KR20220068829A - Image generating device having plurality of image generating mode - Google Patents

Abstract

The present invention relates to an image generating device for acquiring an image of an object, which includes: a control unit for generating a first signal and a second signal; a light irradiation unit irradiating the object with light using the first signal and the second signal; and a light receiving unit acquiring a light receiving signal based on light returning from the object. The control unit generates an image of the object based on the first signal, the second signal, and the light receiving signal. The control unit selects a first mode and a second mode for acquiring the image of the object. In a case where the selected mode is the first mode, the control unit adjusts the frequency component of the first signal to a first frequency and adjusts the frequency component of the second signal to a second frequency. In a case where the selected mode is the second mode, the control unit adjusts the frequency component of the first signal to a third frequency and adjusts the frequency component of the second signal to a fourth frequency. At least one of the difference between the first and third frequencies of the first signal and the difference between the second and fourth frequencies of the second signal is a predetermined frequency or more.

Description

An image generating device having a plurality of image generating modes {IMAGE GENERATING DEVICE HAVING PLURALITY OF IMAGE GENERATING MODE}

The present invention relates to an image generating apparatus having a plurality of image generating modes, and more particularly, the image generating apparatus selects a plurality of modes including a high-speed mode or a high-definition mode for generating an image, and provides an image accordingly It relates to an image generating apparatus having a plurality of image generating modes.

The image generating apparatus is for acquiring an image of the object by irradiating light to the object, and is widely used in various fields such as lidar, optical microscope, endoscope, and endoscope.

In particular, the image generating apparatus can acquire an image of the object in real time, so that continuous image acquisition of the object is possible. Accordingly, not only a still image but also an image of the object that changes in real time can be acquired. . However, when light is irradiated to an object using a pattern among the image generating apparatuses, the positions of the light-irradiated pattern and the actual light information obtained by the image generating apparatus are different, so that distortion may occur in the image generated in real time. have.

Accordingly, in order to obtain an accurate position of the information on the light acquired by the image generating apparatus in real time, a calculation for correcting the phase of the signal for the image generating apparatus to restore information about the light returned from the object in real time may have to be done.

An object of the present application is to provide a method and a system for reconstructing an image using a tendency, and correcting a phase of a reconstructed signal for reconstructing an image.

Another object of the present application is to provide a method and system for selecting a frequency of a signal for reconstructing an image in order to take a high-resolution image.

Another object of the present application is to provide a method and system for correcting an image by converting a region of a signal for reconstructing an image.

According to an embodiment of the present invention, in a method of correcting a phase of a reconstructed signal to increase resolution of an image obtained by an image generating apparatus, obtaining an initial phase correction value of an initial reconstructed signal, the initial phase correction Obtaining a first phase correction value based on a first gradient-based minimum value search technique from the value, and a difference value of a predetermined difference between optical information obtained from at least one pixel of an image obtained based on the corrected reconstructed signal if the value is less than or equal to the value, obtaining a second phase correction value based on the first phase correction value, wherein the image is acquired based on the restored signal and the optical information, and the second phase correction value is the The phase of the restored signal is obtained from the first phase correction value based on a second slope-based minimum value search technique, and the first slope-based minimum value search technique has a different unit for searching the phase from the second slope-based minimum value search technique A calibration method may be provided.

Alternatively, in the image generating apparatus for acquiring an image of an object according to an embodiment of the present invention, a first signal having a first frequency component and a first phase component in a first axis direction and a second signal having a first phase component in a first axis direction A control unit for generating a second signal having two frequency components and a second phase component, a light irradiator for irradiating light to the object using the first signal and the second signal, and light returning from the object a light receiving unit configured to obtain a light receiving signal, wherein the control unit obtains a first data set based on the first signal, the second signal and the light receiving signal, wherein the first signal and the second signal are in a first region (domain), the control unit obtains a third signal and a fourth signal corresponding to a second region, the control unit obtains a second data set based on the third signal and the fourth signal, The first data set and the second data set are different from each other, the control unit obtains an adjustment value of the first data set based on the second data set, and the control unit obtains the adjustment value of the first data set based on the adjustment value. An image generating apparatus may be provided in which a third data set obtained by adjusting one data set is obtained, and the controller generates an image of the object by using the third data set.

Alternatively, in the image generating apparatus for acquiring an image of an object according to an embodiment of the present invention, a control unit for generating a first signal and a second signal, and the first signal and the second signal using the and a light irradiator for irradiating light to the object and a light receiving unit for obtaining a light receiving signal based on the light returning from the object, wherein the control unit applies the first signal, the second signal, and the light receiving signal to the object generates an image for the object, and the controller selects a first mode and a second mode for obtaining an image of the object, and when the selected mode is the first mode, the controller selects a frequency component of the first signal adjusting to a first frequency, adjusting a frequency component of the second signal to a second frequency, and when the selected mode is the second mode, the control unit adjusts a frequency component of the first signal to a third frequency, , adjusting the frequency component of the second signal to a fourth frequency, wherein the difference between the first frequency and the third frequency that is the frequency of the first signal or the second frequency and the fourth frequency that is the frequency of the second signal An image generating apparatus may be provided in which at least one of the differences in frequencies differs by a predetermined frequency or more.

According to the embodiment of the present application, a clear image can be obtained in real time by correcting the image using the tendency.

In addition, according to an embodiment of the present application, a high-resolution image may be obtained by adjusting the frequency of a signal for reconstructing an image.

In addition, according to the embodiment of the present application, the image can be corrected at a high speed by converting the region of the signal for restoring the image and correcting the phase of the restored signal.

1 is a schematic diagram illustrating a configuration of an image generating apparatus according to an exemplary embodiment.
2 is a diagram illustrating a pattern to which light is irradiated and a pattern for image restoration according to an exemplary embodiment.
3A is a schematic diagram illustrating a part of an image generating apparatus including a driving unit 130 and a fiber 310 according to an embodiment, and FIG. 3B is a front view of the driving unit 130 and the fiber 310 It is a cross-sectional view from
4 is a block diagram illustrating a method in which an image generating apparatus acquires data for reconstructing an image, according to an exemplary embodiment.
5 is a table schematically illustrating optical information obtained in response to time information, according to an embodiment.
6 is a table schematically showing light information corresponding to coordinate information, according to an embodiment.
7 is a schematic diagram illustrating light information obtained for each pixel of an image to reconstruct an image, according to an exemplary embodiment.
8 is a block diagram illustrating a method in which one frame for acquiring an image is acquired, according to an embodiment.
9 is a diagram illustrating that a shape of a pattern is changed as a frequency of a signal generating a pattern is changed, according to an exemplary embodiment.
10 is a diagram illustrating that one frame is obtained as a pattern is repeated, according to an embodiment.
11 is a diagram illustrating that a plurality of frames are acquired while a pattern is repeated once, according to an embodiment.
12 is a block diagram illustrating a method for the controller 110 to set a frequency to generate a uniform pattern, according to an embodiment.
13 is a diagram illustrating a shape in which a pattern progresses at an arbitrary point in time prior to one cycle in which the pattern is repeated, according to an exemplary embodiment.
14 is a graph illustrating a relationship between a depth and a first axis disjoint frequency according to an exemplary embodiment.
15 is a block diagram illustrating a method for obtaining, by an image generating apparatus, data in which a phase of a reconstructed signal is corrected, according to an exemplary embodiment.
16 is a diagram illustrating an image of an object reconstructed based on a reconstructed signal having a phase delay and an image of an original object, according to an exemplary embodiment.
17 is a table schematically illustrating coordinate information and optical information corresponding to coordinate information based on a phase-delayed reconstruction signal according to an embodiment.
18 is a schematic diagram illustrating an MC phenomenon when a fiber 310 is driven, according to an embodiment.
19 is a block diagram illustrating a method for the controller 110 to correct a phase, according to an embodiment.
20 is a diagram illustrating an image obtained according to a region of a reconstructed signal, according to an exemplary embodiment.
21 is a diagram illustrating an image of a phase region in which a phase delay of a reconstructed signal does not occur and an image in which a phase delay of a reconstructed signal occurs using coordinate information obtained in the phase domain, according to an embodiment.
22 is a block diagram illustrating a method for the controller 110 to obtain an initial phase correction value of a reconstructed signal based on the symmetry of phase domain coordinate information, according to an embodiment.
23 is a table schematically illustrating optical information acquired in coordinate information acquired in a phase domain of a restored signal in response to time information, according to an embodiment.
24 is a graph illustrating summing light information for each coordinate information based on coordinate information obtained in a phase domain, according to an embodiment.
25 is a block diagram illustrating a procedure for obtaining an approximate phase correction value of an initial phase correction value, according to an embodiment.
26 is a diagram illustrating an image obtained when the MC phenomenon does not occur and an image obtained when the MC phenomenon does not occur using coordinate information obtained in the phase domain, according to an embodiment.
27 is a block diagram illustrating a method for the controller 110 to obtain a detailed phase correction value, according to an embodiment.
28 is a schematic diagram illustrating a plurality of pieces of light information acquired for one piece of pixel information, according to an embodiment.
29 is a block diagram illustrating a method for the controller 110 to obtain a detailed phase correction value by comparing a minimum value between optical information acquired in pixel information while adjusting a phase of a restored signal, according to an exemplary embodiment; .
30 is a block diagram illustrating a method for the controller 110 to obtain a detailed phase correction value while additionally adjusting a phase of a restored signal, according to an embodiment.
31 is a diagram illustrating that the shape of a pattern generated as a phase of a driving signal or a restoration signal is changed is repeated, according to an exemplary embodiment;
32 is a diagram illustrating that FF is repeated according to a phase of a first-axis signal and a phase of a second-axis signal of a driving signal or a restoration signal, according to an embodiment.
33 is a diagram illustrating a density of light information acquired for each pixel information in an entire pixel range, according to an exemplary embodiment.
34 is a diagram illustrating coordinate information or light information acquired in pixel information of a partial region of an acquired image, according to an embodiment.
35 is a schematic diagram illustrating a method of correcting a phase based on coordinate information or light information obtained in a partial pixel area, according to an exemplary embodiment.
36 is a schematic diagram illustrating intersecting a pattern appearing according to a driving signal or a restoration signal, according to an embodiment.
37 is a block diagram illustrating a method for the controller 110 to correct the phase of a restored signal by using optical information obtained from coordinate information of a position where a driving signal or a pattern indicated by the restored signal intersects, according to an embodiment; to be.
38 is a schematic diagram illustrating intersection points obtained in different patterns according to an embodiment.
39 is a graph illustrating a difference value between optical information obtained from at least one or more pieces of pixel information that appears as a phase of a reconstructed signal changes, according to an exemplary embodiment.
40 is a diagram illustrating a difference value between optical information obtained from at least one or more pixel information according to the phase of the restored signal when the controller 110 changes the phase of the restored signal to a phase indicating a specific FF, according to an embodiment. It is a graph.
41 is a block diagram illustrating a method for the controller 110 to obtain a final phase correction value of a reconstructed signal using a tendency, according to an embodiment.
42 is a graph illustrating a difference value between optical information obtained from at least one piece of pixel information that appears as a phase of a restored signal is changed in a partial phase region of the restored signal, according to an embodiment.
43 is a block diagram illustrating a method for the controller 110 to obtain a final phase correction value of a reconstructed signal using a slope-based minimum value search technique, according to an embodiment.

The above-mentioned objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. However, since the present invention may have various changes and may have various embodiments, specific embodiments will be exemplified in the drawings and described in detail below.

In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and also, an element or layer may be referred to as “on” or “on” another component or layer. What is referred to includes all cases in which another layer or other component is interposed in the middle as well as directly on top of another component or layer. Throughout the specification, like reference numerals refer to like elements in principle. In addition, components having the same function within the scope of the same idea shown in the drawings of each embodiment will be described using the same reference numerals.

If it is determined that a detailed description of a known function or configuration related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, numbers (eg, first, second, etc.) used in the description process of the present specification are only identification symbols for distinguishing one component from other components.

In addition, the suffixes "module" and "part" for components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have distinct meanings or roles by themselves.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic such as floppy disks. - includes magneto-optical media, and hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

According to an embodiment, in a method of correcting a phase of a reconstructed signal to increase resolution of an image obtained by an image generating apparatus, obtaining an initial phase correction value of an initial reconstructed signal; Obtaining a first phase correction value based on a 1 slope-based minimum value search technique, and when a difference value of optical information obtained from at least one pixel of an image obtained based on the corrected reconstructed signal is less than or equal to a predetermined difference value , obtaining a second phase correction value based on the first phase correction value, wherein the image is obtained based on the restored signal and the optical information, and the second phase correction value is the first phase Obtained based on a second slope-based minimum value search technique from the correction value, the first slope-based minimum value search technique is the second slope-based minimum value search technique and the phase searching unit is different from each other, the phase correction method of the restored signal can be provided.

In addition, when the first phase correction value is within a predetermined range from the first intermediate phase correction value found based on the first slope-based minimum value search technique, and the restored signal is corrected with the first phase correction value, A method of compensating the phase of the restored signal may be provided, wherein the restored signal has a higher filling ratio than when the restored signal is corrected with the first intermediate phase correction value.

In addition, the filling ratio is a ratio of pixels from which optical information is obtained based on the restored signal for restoring the image among all the pixels of the image obtained by the image generating device, the phase correction method of the restored signal may be provided. .

In addition, the first phase correction value is different from the initial phase correction value by an integer multiple of a predetermined phase difference, the phase correction method of the restored signal may be provided.

In addition, the predetermined phase difference, obtained based on the frequency component of the restored signal, the phase correction method of the restored signal may be provided.

In addition, the first gradient-based minimum value search method and the second gradient-based minimum value search method include at least one of a Nelder-Mead method, a Momentum method, an Adagrad method, an Adam method, a Steepest gradient method, or a gradient descent method. A method of correcting the phase of the restored signal may be provided.

In addition, in the first gradient-based minimum value search method and the second gradient-based minimum value search method, a difference value between the phase of the reconstructed signal and the optical information obtained from at least one pixel of the image based on the reconstructed signal is the minimum. A method of correcting the phase of the restored signal may be provided.

In addition, the difference value of the optical information may be a dispersion of the optical information obtained in at least one pixel of the image, the phase correction method of the reconstructed signal may be provided.

In addition, the difference value of the optical information may be a standard deviation of the optical information obtained in at least one pixel of the image, the phase correction method of the reconstructed signal may be provided.

In addition, a unit for searching the phase of the first slope-based minimum value search technique is larger than a unit for searching the phase of the second slope-based minimum value search technique, and a method of correcting the phase of the restored signal may be provided.

In addition, the initial phase correction value and the first phase correction value of the restored signal are within a trend phase range in the entire phase range of the restored signal, the phase correction method of the restored signal may be provided.

In addition, the tendency phase range is the difference between the optical information as the difference values of the optical information obtained for at least one pixel of the image near the second phase correction value of the restored signal are closer to the second phase correction value. A method of correcting the phase of the reconstructed signal in a range in which the values become smaller may be provided.

In addition, there may be provided a computer-readable recording medium in which a program for executing a phase correction method of a restored signal is recorded.

According to another embodiment, in the image generating apparatus for increasing the resolution of an image obtained by correcting a phase of a restored signal, a controller for correcting the phase of the restored signal, a light irradiator for irradiating light to an object, and a light irradiator for irradiating light to an object and returning from the object and a light receiving unit for receiving incoming light information, wherein the control unit obtains an initial phase correction value of an initial restored signal, and the control unit performs a first phase correction based on a first slope-based minimum value search technique from the initial phase correction value. value is obtained, and when the difference value of the optical information acquired for at least one pixel of the image acquired based on the corrected reconstructed signal is less than or equal to a predetermined difference value, the controller performs a second phase correction based on the first phase correction value. two phase correction values are obtained, the image is obtained based on the restored signal and the light information, and the second phase correction value is obtained based on a second slope-based minimum value search technique from the first phase correction value, and , The first gradient-based minimum value search technique may be provided with an image generating apparatus in which a unit for searching a phase is different from that of the second gradient-based minimum value search technique.

According to an embodiment, in an image generating apparatus for acquiring an image of an object, a first signal having a first frequency component and a first phase component in a first axial direction and a second frequency component and a second signal having a first phase component in a second axial direction A control unit for generating a second signal having two phase components, a light irradiator for irradiating light to the object using the first signal and the second signal, and a light receiving signal based on the light returning from the object a light receiving unit, wherein the control unit obtains a first data set based on the first signal, the second signal and the light receiving signal, wherein the first signal and the second signal correspond to a first domain The control unit obtains a third signal and a fourth signal corresponding to the second region, the control unit obtains a second data set based on the third signal and the fourth signal, and the first data set and the second data set are different from each other, the control unit obtains an adjustment value of the first data set based on the second data set, and the control unit adjusts the first data set based on the adjustment value An image generating apparatus may be provided in which a third data set is obtained, and the controller generates an image of the object by using the third data set.

Also, the image generating apparatus may be provided, wherein the adjustment value is obtained based on the symmetry of the second data set.

In addition, the image generating apparatus may be provided, wherein the symmetry is obtained based on a difference value between a light reception signal obtained at a pixel position of at least one second area obtained based on the third signal and the fourth signal. .

Also, the image generating apparatus may be provided, wherein the difference value is obtained based on a difference value of the sum of at least one or more light reception signals.

In addition, the difference value is obtained based on an integral value of at least one light receiving signal obtained in the second area image according to the phase delay components of the third signal and the fourth signal in the second area, A generating device may be provided.

and the difference value is obtained based on a fixed phase delay component of at least one of a phase delay component of the third signal or a phase delay component of the fourth signal in the second region. can

In addition, the fixed phase delay component is plural, and a fixed phase delay component representing a smallest difference value among difference values obtained based on the fixed phase delay component is the adjustment value. have.

In addition, the fixed phase delay component of the third signal is a first phase adjustment value, the fixed phase delay component of the fourth signal is a second phase adjustment value, and the adjustment value is the first phase adjustment value and the second phase adjustment value.

Also, there may be provided an image generating apparatus, wherein the third data set is obtained on the basis that the first signal is adjusted to the first phase adjustment value and the second signal is adjusted to the second phase adjustment value. have.

Also, in the second region, a third phase adjustment value is obtained based on the first phase adjustment value, and in the second region, a fourth phase adjustment value is obtained based on the second phase adjustment value, and the second phase adjustment value is obtained. and the three data sets are obtained on the basis of which the first signal is adjusted to the third phase adjustment value and the second signal is adjusted to the fourth phase adjustment value.

Also, the image generating apparatus may be provided, wherein the first region corresponds to a sine function region, and the second region corresponds to a region in which the first region is transformed by homeomorphic transformation.

Also, an image generating apparatus may be provided in which the second region corresponds to a region obtained by performing phase isomorphic transformation of the first region into a phase region.

In addition, the image generating apparatus may be provided, wherein the image obtained by the image generating apparatus is obtained in the first area.

In addition, the image generating apparatus may be provided, in which a position in the second region appearing based on the third signal and the fourth signal is repeated based on a predetermined period.

According to another embodiment, a control unit for generating a first signal having a first frequency component and a first phase component in a first axial direction and a second signal having a second frequency component and a second phase component in a second axial direction , Obtaining an image of an object in an image generating apparatus comprising: a light irradiator for irradiating light to the object by using the first signal and the second signal; and a light receiver for obtaining a light reception signal based on the light returned from the object In the method for doing this, the method comprising: obtaining a first data set based on the first signal, the second signal, and the light-receiving signal, wherein the first signal and the second signal correspond to a first domain; , obtaining a third signal and a fourth signal corresponding to the second region, obtaining a second data set based on the third signal and the fourth signal, the first data set and the second data sets are different from each other, and obtaining an adjustment value of the first data set based on the second data set, obtaining a third data set obtained by adjusting the first data set based on the adjustment value; The image generating method may include, by the controller, generating an image of the object by using the third data set.

In addition, there may be provided a computer-readable recording medium in which a program for executing the image generating method is recorded.

In an image generating apparatus for acquiring an image of an object according to an embodiment, a controller for generating a first signal and a second signal, and irradiating light to the object using the first signal and the second signal and a light receiving unit for obtaining a light receiving signal based on the light returning from the object, wherein the control unit generates an image of the object based on the first signal, the second signal, and the light receiving signal, , the controller selects a first mode and a second mode for acquiring an image of an object, and when the selected mode is the first mode, the controller adjusts a frequency component of the first signal to a first frequency and adjusts a frequency component of the second signal to a second frequency, and when the selected mode is the second mode, the controller adjusts the frequency component of the first signal to a third frequency, and the second signal adjusts a frequency component of , to a fourth frequency, wherein at least one of a difference between the first frequency and the third frequency that is the frequency of the first signal or a difference between the second frequency and the fourth frequency that is the frequency of the second signal An image generating apparatus may be provided, wherein at least one differs by a predetermined frequency or more.

In addition, the image generating apparatus may be provided, further comprising a mode selector from which the first mode or the second mode can be selected.

Also, the first mode may be a high-speed scan mode, and the second mode may be a high-definition scan mode.

In addition, the high-speed scan mode acquires one image based on a period in which a first scanning pattern that appears based on the first signal adjusted to the first frequency and the second signal adjusted to the second frequency is repeated, The high-definition scan mode acquires at least one image before a period in which a second scanning pattern appearing based on the first signal adjusted to the third frequency and the second signal adjusted to the fourth frequency is repeated. A device may be provided.

In addition, when the frequency component of the first signal changes from the first frequency to the third frequency by more than the predetermined frequency, or the frequency component of the second signal changes from the second frequency to the fourth frequency by the predetermined frequency or more case, a scanning pattern appearing based on the changed first signal and the changed second signal is different from a scanning pattern appearing based on the first signal and the second signal before being changed to the predetermined frequency, the image generating apparatus is provided can be

Also, the scanning pattern may be a pattern obtained when the first signal is applied to a first axis and the second signal is applied to a second axis perpendicular to the first axis, the image generating apparatus may be provided. .

According to another embodiment, based on a control unit for generating a first signal and a second signal, a light irradiator for irradiating light to the object using the first signal and the second signal, and light returning from the object In the image acquisition method of an image generating apparatus including a light receiving unit for obtaining a light receiving signal, the control unit generating an image of the object based on the first signal, the second signal, and the light receiving signal; selecting a first mode and a second mode for obtaining adjusting to a second frequency and when the selected mode is the second mode, adjusting a frequency component of the first signal to a third frequency and adjusting a frequency component of the second signal to a fourth frequency; At least one of the difference between the first frequency and the third frequency that is the frequency of the first signal or the difference between the second frequency and the fourth frequency that is the frequency of the second signal is different by a predetermined frequency or more A method may be provided.

In addition, there may be provided a computer-readable recording medium in which a program for executing the image acquisition method is recorded.

One. image generator general

1.1. image generator

Hereinafter, an image generating apparatus that can be used to acquire an image of an object will be described. Here, the image generating device may be an optical device in which the acquired or provided image is at least one of a reflection image, a fluorescence image, and a transmission image of the object.

1 is a schematic diagram illustrating a configuration of an image generating apparatus according to an exemplary embodiment.

Referring to FIG. 1 , an image generating apparatus according to an exemplary embodiment may include a controller 110 , a light generator 120 , a driver 130 , a light receiver 140 , and a display 160 .

According to an embodiment, the image generating device may include a device for generating an image using light, such as a lidar, a laser scanner, or a confocal microscope.

The controller 110 may run software, a program, or an algorithm necessary for generating and correcting an image. In other words, the controller 110 may receive an electrical signal and output the electrical signal.

For example, the controller 110 may drive software or a program for generating an image or an algorithm for generating an image based on a data acquisition method to be described later.

However, the use of the control unit 110 is not limited to the above-described example, and the control unit 110 may drive software, a program, or an algorithm that can be performed by a typical computing device.

The light generator 120 may generate light in various wavelength bands including infrared rays, ultraviolet rays, and visible rays. The light generated from the light generator 120 may be irradiated to the object.

For example, the light generated by the light generator 120 may be light having a wavelength of 405 nm, 488 nm, or 785 nm for emitting a fluorescent dye, but is not limited thereto. Light having a wavelength band may be light in a wavelength band for emitting a fluorescent material including an autofluorescent biomaterial present in an object.

In addition, the light generated by the light generator 120 may be unamplified light or light amplified by stimulated emission (Light Amplification by the Stimulated Emission of Radiation; hereinafter laser).

The driving unit 130 may drive a configuration on the light movement path so that the path when the light generated by the light generating unit 120 is irradiated to an object is changed. In other words, the driving unit 130 may receive electrical energy or an electrical signal from the control unit 110 to drive a configuration on the light movement path. Here, the configuration on the light movement path may include a fiber 310 serving as a light movement path or a MEMS mirror through which light generated by the light generator 120 is reflected.

For example, the driving unit 130 may be a driving element including an electric motor, a magnetic motor, a piezoelectric element, or a thermoelectric element. However, it is not limited to the above-described example, and the driving unit 130 may include an element capable of generating kinetic energy when an electric or magnetic force is applied.

According to an embodiment, the driving unit 130 may drive the components on the light movement path in at least one direction. That is, the driving unit 130 may receive an electrical signal and apply a force to the components on the optical movement path in at least one or more axial directions.

For example, when one axis is determined in a space in which light is irradiated to the object, the driving unit 130 may apply a force in one axial direction and an axial direction corresponding to a direction perpendicular to the preceding axis. In other words, the driving unit 130 may drive the configuration on the light movement path in one axial direction and an axial direction corresponding to a direction perpendicular to the preceding axis.

The light receiving unit 140 may convert light energy of light returned from the object into electrical energy and transmit it to the control unit 110 . In other words, the light receiving unit 140 may obtain information on the light returned from the object in the form of an electric signal. Hereinafter, for convenience of explanation, the light receiving unit 140 acquires the information of the light returned from the object in the form of an electrical signal and transmits it to the control unit 110 It is expressed as "the control unit 110 acquires the light information", This may mean that the controller 110 does not directly acquire the optical information, and as mentioned above, the optical information acquired by the light receiver 140 is transmitted to the controller 110 . Similarly, “the light receiving unit 140 acquires light information” may also mean that the light receiving unit 140 converts light energy into electrical energy.

In addition, the light information to be described below may include light intensity in units representing the color of light, such as black and white RGB and CMYK, light position information, time information related to the time at which the light is acquired, and the like. However, for convenience of description, light information expressed below may mean light intensity.

Here, the light receiving unit 140 may include an imaging device, a light receiving device, a photographing device, an optical receiver, a light detector, or a light receiving device for acquiring optical information. For example, the light receiving unit 140 may include a CCD, CMOS, PMT (photoelectric amplification tube), or a photodiode. However, the light receiving unit 140 is not limited to the above example, and an element capable of converting light energy into electrical energy may be included in the light receiving unit 140 .

The display unit 160 may display the image generated by the control unit 110 in an identifiable form. In other words, the display unit 160 may receive the image generated by the control unit 110 and display it for the user to identify.

For example, the display unit 160 may include an image display device including a CRT, LCD, LED, or liquid crystal on silicon (LCoS). However, the display unit 160 is not limited to the above example, and a device capable of receiving an electrical signal and displaying an image may be included in the display unit 160 .

According to another embodiment, the image generating apparatus may be provided so as not to include the display unit 160 . That is, referring to FIG. 1 , although it is illustrated that the display unit 160 is included in the image generating apparatus, the present invention is not limited thereto. An image generating device may be provided.

2 is a diagram illustrating a pattern to which light is irradiated and a pattern for image restoration according to an exemplary embodiment. In other words, an electrical signal input by the controller 110 to the driving unit 130 or a restoration signal used by the controller 110 to restore an image may represent a specific pattern.

Fig. 2 (a) shows a spiral pattern, Fig. 2 (b) shows a raster pattern, and Fig. 2 (c) shows a Lissajous pattern.

According to an embodiment, when irradiating light to the object, the image generating apparatus may irradiate light to the object so that a path of the emitted light follows a specific pattern. In other words, when the path through which the light irradiated to the object is irradiated overlaps for a specific time, the path through which the light passes may represent a specific pattern. Here, the overlapping specific time may mean a time at which the pattern is completed.

Referring to FIG. 2 , light irradiated to the object may be irradiated to the object in different patterns according to an electrical signal input to the driving unit 130 . Hereinafter, for convenience of description, irradiation of light to an object may be expressed as scanning the object or scanning light on the object.

For example, referring to FIG. 2A , when the amplitude of the electric signal input to the driving unit 130 is changed, the path of light irradiated to the object may represent a spiral pattern.

In addition, for example, referring to FIG. 2B , an electric signal input to the driving unit 130 includes a first driving signal for driving the driving unit 130 or a configuration on a movement path of light in one axial direction, and the preceding axis When a second driving signal for driving the driving unit 130 or a component on the movement path of light in a direction perpendicular to the direction is included, when the frequency of the first driving signal and the frequency of the second driving signal differ by an integer multiple, The path of the irradiated light may represent a raster pattern.

Also, for example, referring to FIG. 2(c) , an electric signal input to the driving unit 130 includes a first driving signal for driving the driving unit 130 or a configuration on a movement path of light in one axial direction, and the preceding axis. When a second driving signal for driving the driving unit 130 or a component on the movement path of light in a direction perpendicular to the direction is included, when the frequency of the first driving signal and the frequency of the second driving signal are different from each other, the object is irradiated The path of light may exhibit a Lissajous pattern.

According to another embodiment, in the image generating apparatus, when the controller 110 acquires optical information through the light receiving unit 140 , a restoration signal for restoring an image using the acquired optical information may indicate a specific pattern. Here, when the reconstructed signal indicates a specific pattern, it may mean that the pattern is actually expressed in an image reconstructed based on the reconstructed signal, or is not actually displayed on the image, but the signal for forming the above-mentioned specific pattern is It may mean that it is a restoration signal.

According to another exemplary embodiment, the pattern indicated by the driving signal for driving the driving unit 130 and the restoration signal for restoring the image may be the same. In other words, the signal input by the controller 110 to the driver 130 and the signal used by the controller 110 to restore the image may be the same.

According to another embodiment, when a phase delay occurs, a pattern indicated by a driving signal for driving the driving unit 130 and a restoration signal for restoring an image may be different from each other.

For example, the path of light actually irradiated to the object may be different from the pattern indicated by the driving signal, and accordingly, the restoration signal may be a signal indicating a pattern for reflecting the path of light actually irradiated to the object. In other words, the restored signal may be a signal corrected to generate a pattern identical to or similar to a pattern actually irradiated to the object. The correction of the reconstructed signal will be described in detail in a related part below.

Hereinafter, it will be described that the pattern used by the image generating apparatus is a Lissajous pattern, but as described in the above embodiments, various patterns may be used as the pattern used by the image generating apparatus.

1.1.1. General image generating device using fiber 310

According to an exemplary embodiment, an image generating apparatus may be provided in which a path through which light generated by the light generating unit of the image generating apparatus travels is an optical fiber 310 (hereinafter, referred to as a fiber 310 ). In other words, the image generating apparatus in which the configuration on the optical movement path described above is the fiber 310 may be provided.

3(a) is a schematic diagram illustrating a part of an image generating apparatus including a driving unit 130 and a fiber 310 according to an embodiment, and FIG. 3(b) is a front view of the driving unit 130 and the fiber 310 It is a cross-sectional view from

Referring to FIG. 3A , at least a portion of the fiber 310 may be accommodated in at least a portion of the driving unit 130 . In other words, at least a portion of the fiber 310 may be coupled to the driving unit 130 .

Accordingly, when the driving unit 130 receives an electrical signal from the control unit 110 to drive the fiber 310 , the fiber 310 may be driven so that a path through which light is irradiated with respect to a predetermined area of the object exhibits a specific pattern.

As a specific example, when the light generated from the light generator 120 is irradiated to the object, the driver 130 receives an electrical signal capable of generating a Lissajous pattern, and the path through which the fiber 310 points to the object is It can be driven to become a Lissajous pattern.

Although not shown in FIG. 3A , an additional attachment may be attached to the fiber 310 . For example, the additional attachment may be a mass for increasing the amplitude at which the fiber 310 is driven, or a structure attached to the fiber 310 to separate the resonant frequency of the fiber 310 in at least one direction or more. .

Referring to FIG. 3B , the configuration of the driving unit 130 and the fiber 310 according to an exemplary embodiment may be provided.

For example, referring to FIG. 3B , the driving unit 130 may include a first axis driving element, a second axis driving element, and an insulating element. Here, the first axis driving element and the second axis driving element may be separated from each other by an insulating band 132 , and each driving element may be composed of a set of at least one or more driving elements. In other words, the first axis driving element may include at least one driving element so that the driving unit 130 or the fiber 310 is driven in the first axis direction, and the second axis driving element is the driving unit 130 or the fiber The 310 may include at least one driving element to be driven in the second axis direction. Here, when the object is scanned, the first axis and the second axis may be a predetermined axis on a plane on which the object is scanned and an axis perpendicular to the predetermined axis. That is, on a plane in which the object is scanned, the first axis may mean the x-axis, the second axis may mean the y-axis, and conversely, the first axis may mean the y-axis and the second axis may mean the x-axis.

1.1.2. General image generating device that does not use fiber 310

According to an exemplary embodiment, an image generating apparatus may be provided in which the configuration of the optical path through which the light generated by the light generating unit 120 moves is not the fiber 310 . In other words, when light is irradiated to the object, an image generating apparatus for irradiating light in a specific pattern to the object may be provided.

For example, an image generating apparatus in which the configuration on the optical path through which the light generated by the light generating unit 120 moves is a mirror may be provided. Specifically, when the light generated by the light generator 120 is incident on the mirror through a medium capable of transmitting light including air or vacuum, the mirror reflects the light to irradiate the light to the object. . Here, the mirror capable of reflecting light may include a configuration made of a material capable of irradiating light including a MEMS Mirror.

According to another exemplary embodiment, an image generating device that is the light receiving unit 140 may be provided as a configuration on a light path through which the light generated by the light generating unit 120 moves.

For example, when light is irradiated to the object and the light returns from the object, the light receiving unit 140 may be driven by the driving unit 130 . Specifically, the light receiving unit 140 may be driven so that a path of a pixel from which light information is obtained becomes a specific pattern.

1.2. Data Acquisition Method of Image Generating Device

Hereinafter, a method of acquiring data including optical information acquired through the light receiving unit 140 of the image generating apparatus will be described.

4 is a block diagram illustrating a method in which an image generating apparatus acquires data for reconstructing an image, according to an exemplary embodiment.

Referring to FIG. 4, the method for the image generating apparatus to obtain data for reconstructing an image includes obtaining optical information and obtaining time information (S1000), obtaining coordinate information based on the time information (S1200), It may include substituting the optical information into the coordinate information (S1400) and acquiring an image (S1600).

5 is a table schematically illustrating optical information obtained in response to time information, according to an embodiment.

However, the tables regarding the data acquisition method and data storage method shown below, including FIGS. 5, 6, 17 and 23, are schematically prepared tables for convenience of explanation, and data may be obtained in reality as in the table. However, the manner in which the actual data is stored or obtained does not mean that the data is directly stored in the form of a table.

4 and 5 , the step of acquiring optical information and acquiring time information ( S1000 ) is when the control unit 110 acquires optical information through the light receiving unit 140 , time information at which the optical information is acquired may include being obtained together.

Alternatively, with reference to FIGS. 4 and 5 , the step of acquiring optical information and acquiring time information ( S1000 ) is performed by the control unit 110 based on a predetermined time interval regardless of whether the light receiving unit 140 acquires the optical information. It may include obtaining the time information with the data, obtaining the light information based on a predetermined time interval, and matching the obtained time information with the light information.

Here, the acquired time information may be acquired in proportion to the number of acquired optical information. That is, when n pieces of light information are obtained from the light receiving unit 140 , the controller 110 may obtain n pieces of time information. Here, n may be an integer of at least 1 or more.

For example, referring to FIG. 5 , when the light information obtained by the controller 110 is sequentially i1, i2, and i3, and when the respective light information is obtained at t1, t2 and t3, the controller 110 ) indicates that i1 is obtained at time t1, i2 is obtained at time t2, and i3 is obtained at time t3, and data may be acquired or stored.

6 is a table schematically showing light information corresponding to coordinate information, according to an embodiment.

4 and 6 , the step of obtaining coordinate information based on the time information ( S1200 ) may include deriving the coordinate information using the previously obtained time information. In other words, the coordinate information may be obtained by a predetermined relationship between the time information and the coordinate information. Here, the predetermined relationship may be a reconstruction signal for reconstructing coordinate information or an image.

[Formula 1]

Equation 1 is an equation representing a restoration signal that can be used to convert time information into coordinate information and a driving signal for determining a pattern for irradiating light to an object according to an embodiment.

는 제1축 진폭으로, 구동 신호 또는 복원 신호의 제1축으로의 진폭을 나타내고,

는 제1축 주파수로, 구동 신호 또는 복원 신호의 제1축으로의 주파수를 나타내고,

는 시간 정보를 나타내고,

는 제1축 위상으로, 구동 신호 또는 복원 신호의 제1축으로의 위상을 나타낸다. 또한, 수식 1의 y는 제2축 좌표 정보를 나타내고,

는 제2축 진폭으로, 구동 신호 또는 복원 신호의 제2축으로의 진폭을 나타내고,

는 제2축 주파수로, 구동 신호 또는 복원 신호의 제2축으로의 주파수를 나타내고,

는 시간 정보를 나타내고,

는 제2축 위상으로, 구동 신호 또는 복원 신호의 제2축으로의 위상을 나타낸다.Referring to Equation 1, x in Equation 1 represents the first axis coordinate information,

is the first axis amplitude, and represents the amplitude of the driving signal or the restored signal along the first axis,

is the first axis frequency, and represents the frequency of the driving signal or the restoration signal to the first axis,

represents time information,

is the first axis phase, and represents the phase of the driving signal or the restoration signal along the first axis. In addition, y in Equation 1 represents the second axis coordinate information,

is the second axis amplitude, and represents the amplitude of the driving signal or the restored signal along the second axis,

is the second axis frequency, and represents the frequency of the driving signal or the restoration signal along the second axis,

represents time information,

is the second axis phase, and represents the phase of the driving signal or the restoration signal along the second axis.

Hereinafter, for convenience of explanation, a signal representing the first axis coordinate information may be described as a first axis signal, and a signal representing the second axis coordinate information may be described as a second signal.

In addition, here, the unit of the phase may be time, frequency domain, or radian, but is not limited thereto, and any unit capable of expressing a phase may be a unit of a phase.

6 and Equation 1, coordinate information obtained by the controller 110 may mean coordinate information in a Cartesian coordinate system. However, the present invention is not limited thereto, and coordinate information obtainable by the controller 110 includes coordinate information in a polar coordinate system, 3-dimensional coordinate information, 4-dimensional coordinate information, coordinate information in a spherical coordinate system, and coordinates in a cylindrical coordinate system. Information and coordinate information in the Torus coordinate system may be included. However, the coordinate system used in the coordinate information does not mean a coordinate system in one domain, and the same coordinate system may be used even when variables constituting the coordinate system exist in different domains. For example, a Cartesian coordinate system may be used both when time and intensity are used as variables, and when frequency and intensity are used as variables, respectively.

For example, referring to FIGS. 5 and 6 and Equation 1, coordinate information including first-axis coordinate information and second-axis coordinate information may be acquired from time information acquired by the controller 110 .

As a specific example, when the time information is t1, when the acquired optical information is i1, when t1 is substituted into a restoration signal capable of converting the time information into coordinate information, the control unit 110 controls the first axis coordinate information. It is possible to obtain x1 and y1, which is the second axis coordinate information. In other words, when the time information obtained by the control unit 110 is t1, the control unit 110 may obtain coordinate information x1 and y1 that can represent one point on a two-dimensional plane from the time information t1. Similarly, when the time information obtained by the control unit 110 is t2 and t3, the control unit 110 may obtain x2, y2 coordinate information corresponding to the time information t2, and x3, y3 coordinate information corresponding to the time information t3. have. Here, when there are n pieces of time information obtained by the control unit 110, the control unit 110 may obtain n pieces of first-axis coordinate information and second-axis coordinate information (x, y, respectively) corresponding to the time information. have.

4 and 6, in the step of substituting the optical information into the coordinate information (S1400), the controller 110 substitutes the acquired optical information into the coordinate information acquired through time information based on the restored signal in the previous step. may include doing

However, referring to FIG. 4 , the step of obtaining coordinate information based on the time information ( S1200 ) and the step of substituting optical information into the coordinate information ( S1400 ) are illustrated as separate steps, but is not limited thereto. When obtaining the coordinate information, the optical information may be substituted at the same time. In other words, in the already acquired data on time information and light information, the controller 110 may change only time information into coordinate information. Accordingly, the optical information is not actually substituted into the obtained coordinate information, but the optical information may correspond to the coordinate information as the time information is changed to the coordinate information. Hereinafter, the correspondence of optical information to coordinate information or time information is expressed as substituting optical information to time information or coordinate information.

7 is a schematic diagram illustrating light information obtained for each pixel of an image to reconstruct an image, according to an exemplary embodiment.

However, in the case of the pixel schematic diagram and the restored image when the image is restored, including FIG. 7 below, it is only used for convenience of explanation, and only optical information and coordinate information that are not actually provided with an image are obtained. It can mean status.

4 and 7, the step of obtaining the image (S1600) includes reconstructing the image based on the previously obtained coordinate information and light information.

Here, the previously obtained coordinate information may correspond to pixel information of the reconstructed image. In other words, the coordinate information may be the same as the pixel information, or the pixel information may be derived from the coordinate information. In this case, the pixel information may mean position information including coordinate information of a pixel in the image.

Also, a pixel described below may be a unit for expressing light information in an image. In other words, the image acquired by the controller 110 may include a plurality of pixels for representing light information. Here, the size of the unit pixel may be determined based on the size of the acquired image and the predetermined number of pixels. Similarly, the number of unit pixels may be determined based on the size of an image and the size of pixels.

Also, the obtained image may have various resolutions. For example, the acquired image is 256*256, 512*512, 1024*1024, SVGA(800*600), XGA(1024*768), WXGA(1280*800), FHD(1920*1080), WUXGA( 1920*1200), QHD(2560*1440) or UHD(4K)(3840*2160), UHD(8K)(7680*4320), etc. In the case of having a plurality of pixels for this purpose, it may be included in the resolution of the image obtained by the controller 110 . The above-mentioned resolution may mean the actual number of pixels, but is not limited thereto and may mean the number of pixels based on parts per inch (ppi).

For example, referring to FIG. 7 , an acquired image may include n pixels as a first axis and m pixels as a second axis. In this case, the optical information may be substituted into the pixel information corresponding to the previously obtained coordinate information. Accordingly, when light information is substituted for a plurality of pixels, the controller 110 may acquire an image of the object.

In this case, when the phase of the restored signal for restoring the coordinate information is different from the signal forming the pattern in which the light is actually irradiated to the object, the obtained image may be distorted and provided. Accordingly, the phase correction of the restored signal may be required, and the phase correction of the restored signal will be described in detail in a related part below.

One. Image creation using scanning patterns

Hereinafter, a method of generating an image using a scanning pattern will be described. The image acquired here may be an image for a single moment, or acquiring one frame from successive images of an object may be expressed as acquiring an image.

In other words, when images are continuously acquired with respect to an object, the controller 110 may acquire an image of the object.

8 is a block diagram illustrating a method in which one frame for acquiring an image is acquired, according to an embodiment.

Referring to FIG. 8 , the method of acquiring one frame may include acquiring one frame after a predetermined time ( S2000 ) and acquiring an image ( S2200 ).

According to an embodiment, acquiring one frame after a predetermined time ( S2000 ) may include obtaining, by the controller 110 , one frame at a preset time.

According to another embodiment, in the step (S2000) of obtaining one frame after a predetermined time, based on that the scanning pattern is repeated after a predetermined time, the controller 110 selects one frame for each unit time in which the scanning pattern is repeated. It may include acquiring

According to another embodiment, obtaining one frame after a predetermined time ( S2000 ) may include obtaining, by the controller 110 , one frame before a time at which the scanning pattern is repeated.

Here, the scanning pattern may be a pattern for irradiating light to the object, or may mean a pattern of a restoration signal for restoring an image.

Also, here, when the control unit 110 acquires one frame, it may mean acquiring time information, coordinate information, and light information every predetermined time. Alternatively, the controller 110 acquiring one frame may mean acquiring an image based on the acquired time information, coordinate information, and light information. Alternatively, when the controller 110 acquires one frame, it may mean designating data for generating an image as data for one frame based on time information, coordinate information, and light information for acquiring the image.

According to another embodiment, after one frame is acquired, the controller 110 may additionally acquire an image by using coordinate information acquired for each pixel information or optical information corresponding to the coordinate information.

In other words, after one frame is acquired, the controller 110 does not substitute new coordinate information or optical information corresponding to coordinate information for all pixel information for each frame, but coordinate information or coordinate information to the corresponding pixel information. Whenever optical information corresponding to , is obtained, the optical information may be substituted for the corresponding pixel information. That is, each pixel information may be updated for each pixel regardless of whether one frame is obtained.

Here, the update of the optical information may mean that the value of the optical information substituted for the corresponding pixel information is replaced with the newly acquired optical information.

A condition for the controller 110 to acquire one frame will be described in detail in the related part below.

The step of acquiring the image ( S2200 ) may be the same as the step of acquiring the image ( S1600 ) of FIG. 4 . In other words, the step of obtaining the image ( S2200 ) may be a step of the controller 110 obtaining and providing an image of the object.

1.1. How to select a frequency to create an image

Hereinafter, a method for the control unit 110 to select a frequency of a restoration signal or a driving signal in order to minimize coordinate information or pixel information to which optical information is not substituted will be described.

9 is a diagram illustrating that a shape of a pattern is changed as a frequency of a signal generating a pattern is changed, according to an exemplary embodiment.

According to an embodiment, according to the selection of the first axis frequency and the second axis frequency and the difference between the first axis phase and the second axis phase, the controller 110 may obtain different pattern shapes. In other words, a fill factor (hereinafter referred to as FF) at which a specific area is filled may vary depending on the selection of the first axis frequency and the second axis frequency and the difference between the first axis phase and the second axis phase. Here, FF may be expressed as a percentile percent or may be expressed to have a value between 0 and 1.

및

를 의미할 수 있다. Referring back to Equation 1, the first axis frequency and the second axis frequency are each of the restored signal or the driving signal.

and

can mean

Here, FF may mean a ratio of an area to which light is actually irradiated among an area for scanning an object.

Alternatively, FF may mean a ratio of the number of pixels for which coordinate information or pixel information is obtained by the restoration signal among the total number of pixels of the obtained image. In other words, FF may mean a ratio of the number of pixels from which light information is actually acquired among the total number of pixels of an acquired image.

Accordingly, when the acquired image is restored, if the FF is high, the controller 110 may acquire an image having a substantially high resolution. An image having a substantially higher resolution as referred to herein may mean that light information is acquired in more pixels than an image having a substantially lower resolution. In other words, an image having a substantially higher resolution may mean an image having a higher image quality.

For a specific example, referring to FIG. 9 , FIG. 9 (a) is a view showing a case where the first axis frequency is 4 hz and the second axis frequency is 6 hz, and FIG. 9 (b) is the first axis frequency 7hz, the second axis frequency is 8hz, Fig. 9(c) is a view showing that the first axis frequency is 16hz and the second axis frequency is 19hz.

Here, referring to FIG. 9 , in FF, when the first axis frequency and the second axis frequency are in a similar band, the Great Common Divisor (GCD) of the first axis frequency and the second axis frequency becomes smaller. may be larger.

As a specific example, referring to FIGS. 9(a) and 9(b), the GCD of the first axis frequency and the second axis frequency of FIG. 9(a) is 2, but the first axis frequency of FIG. 9(b) is Since the GCD of the frequency and the second axis frequency is 1, accordingly, the pattern of FIG. 9(b) may have a larger FF than the pattern of FIG. 9(a).

Also, referring to FIG. 9 , FF may be increased when the first axis frequency or the second axis frequency is set to be high.

As a specific example, referring to FIGS. 9(b) and 9(c), the GCD of the first axis frequency and the second axis frequency in FIGS. 9(b) and 9(c) is 1, but FIG. 9( Since the bands of the 1st axis frequency and the 2nd axis frequency of c) are set higher than the bands of the 1st axis frequency and the 2nd axis frequency of FIG. 9(b), the pattern of FIG. FF may be larger than the pattern of

Here, the first axis frequency and the second axis frequency set as the driving signal or the restoration signal may be set based on the resonance frequency of the fiber 310 so that the fiber 310 of the image generating apparatus is resonance driven.

1.2. Frame acquisition method using non-uniform progression pattern and uniform progression pattern

The non-uniform progression pattern and the uniform progression pattern, which will be described below, may be a shape of a pattern indicated by a driving signal or a restoration signal, respectively.

Here, the non-uniform progress pattern may refer to a pattern in which coordinate information or optical information acquired based on a driving signal or a restoration signal while the pattern is in progress is obtained by biasing some pixel information among all pixel information.

Also, the uniform progress pattern may refer to a pattern in which coordinate information or optical information acquired based on a driving signal or a restoration signal while the pattern is in progress is acquired over all pixel information.

10 is a diagram illustrating that one frame is obtained as a pattern is repeated, according to an embodiment.

In FIG. 10 , a region in which a pattern is generated may be a region in an object according to a driving signal.

Alternatively, in FIG. 10 , the region in which the pattern is generated may be a pixel region of at least a portion of an image obtained according to the restoration signal.

Referring to FIG. 10 , a predetermined time for acquiring one frame for acquiring an image may be a time during which a pattern of a driving signal or a restoration signal is repeated once.

According to an embodiment, the pattern indicated by the driving signal or the restoration signal may have the same direction in which the pattern proceeds at the start position and the start position and the direction in which the pattern proceeds at the end position and the end position. In other words, the pattern indicated by the driving signal or the restoration signal may be repeated at regular time intervals. Hereinafter, the repetition time of the pattern indicated by the driving signal or the restoration signal may be expressed as one cycle.

According to another exemplary embodiment, the pattern indicated by the driving signal or the restoration signal starts to be generated and reaches a position that can have the maximum FF in the area of the object irradiated with light or the area of all pixels of the image to be acquired, and then the pattern is resumed You can return to the position where this first occurred. In other words, the pattern generated by the driving signal or the restoration signal may proceed from the starting point to the point having the maximum FF and then proceed to the starting point again.

In this case, the controller 110 may acquire one frame for each time the pattern is repeated once. In other words, the control unit 110 may acquire one frame for each predetermined time that the pattern is repeated once, that is, for each predetermined unit time.

Here, in order to obtain one frame, the pattern indicated by the driving signal or the restoration signal may be either a uniform progression pattern or a non-uniform progression pattern.

Also, whenever one frame is acquired, the controller 110 may perform phase correction of the restored signal for image restoration.

1.3. Frame acquisition method using uniform progression pattern

Hereinafter, a method for acquiring one frame using a uniform progression pattern will be described.

11 is a diagram illustrating that a plurality of frames are acquired while a pattern is repeated once, according to an embodiment.

According to an embodiment, in order for the controller 110 to acquire a plurality of frames, the controller 110 may acquire a plurality of frames during one cycle in which a pattern is repeated from an initial stage in which an image is acquired.

According to another embodiment, in order for the controller 110 to acquire a plurality of frames, the controller 110 initially acquires one frame for one period in order to acquire an image, and then acquires a plurality of frames for one period in which the next pattern is repeated. frames can be obtained.

Referring to FIG. 11 , a plurality of frames may be acquired during one period in which a pattern generated according to a driving signal or a restoration signal is repeated. In other words, before the pattern generated by the driving signal or the restoration signal is repeated, the controller 110 may acquire one frame for image acquisition.

For example, the controller 110 may acquire 5 frames during one period in which the pattern is repeated. Here, the time for acquiring one frame may be a time unit obtained by dividing the time of one cycle in which the pattern is repeated equally into five time units.

Here, when one frame is acquired before the pattern is repeated, the pattern generated by the driving signal or the restoration signal requires that the object be uniformly scanned or pixel coordinate information must be uniformly acquired before one repetition period. can That is, it may mean that the scan must be performed over the entire area of the object being scanned for a time shorter than the period in which the pattern generated by the driving signal or the restoration signal is repeated, or coordinate information must be obtained over the entire acquired pixel area. have.

In the above-mentioned embodiments, whenever one frame is acquired, the controller 110 may perform phase correction of the restored signal for image restoration.

12 is a block diagram illustrating a method for the controller 110 to set a frequency to generate a uniform pattern, according to an embodiment.

Referring to FIG. 12 , the method for the controller 110 to set the frequency to generate a uniform pattern includes the step of setting the initial frequency ( S3000 ), and selecting a frequency candidate from a frequency near the initial frequency in which the initial frequency and the GCD are the same. and selecting a frequency having a uniform pattern from among frequency candidates (S3400).

In the step of setting the initial frequency ( S3000 ), the control unit 110 may include setting the first axis frequency and the second axis frequency of the driving signal or the restoration signal.

According to an embodiment, as described above, the controller 110 sets the initial frequency based on the first-axis frequency and the second-axis frequency of the driving signal or the restoration signal based on the resonance driving frequency of the fiber 310 . can be set by In other words, the first axis of the driving signal and the second axis of the restored signal may have the same direction, and similarly, the first and second axes of the fiber 310 are the first and second axes of the driving signal or the restored signal. can have the same direction as

For example, when the resonance frequency of the first axis of the fiber 310 is 1100 hz, the controller 110 may set the first axis frequency of the driving signal or the restoration signal to a frequency similar to 1100 hz. In addition, in order to minimize the occurrence of a mechanical coupling (hereinafter referred to as MC) phenomenon of the fiber 310 , the control unit 110 sets the second axis frequency of the driving signal or the restoration signal from the first axis frequency of 1100hz to a predetermined value. It can be set to 1300hz, which is separated by the frequency band of . However, the first axis frequency and the second axis frequency to be set are not limited to the above example, and may be determined based on the resonance frequency for resonant driving the fiber 310 as described above.

Here, the MC phenomenon refers to a phenomenon in which the bands of the first axis frequency and the second axis frequency of the driving signal are not sufficiently separated, so that when the fiber 310 is driven in the first axis, it is also driven in the second axis. can do.

In the step (S32000) of selecting a frequency candidate from a frequency near the initial frequency in which the initial frequency and the GCD are the same, the control unit 110 selects a frequency candidate having the same or similar FF as the first axis frequency and the second axis frequency. This may include choosing In other words, the controller 110 may change the initial frequency to obtain a plurality of frequency candidate groups having the same or similar FF within a range where the difference from the initial frequency is not large.

Here, the frequency adjacent to the initial frequency set by the controller 110 may be a frequency having a predetermined band from the first axis frequency and the second axis frequency, which are the selected initial frequencies. For example, the neighboring frequency may mean a frequency within 10 Hz from the initial frequency. However, it is not limited to the above-mentioned example, and the neighboring frequency may be selected within a range in which the initial frequency and FF are not significantly different. In addition, the neighboring frequency may be a frequency selected within a range in which the MC phenomenon does not occur when the frequency is changed from the initial frequency. However, the present invention is not limited thereto, and a neighboring frequency may be selected even within a range in which the FF is significantly different.

The neighboring frequency candidates selected from the initial frequency may be plural. In other words, a plurality of first-axis frequency candidates and a plurality of second-axis frequency candidates may be selected. Here, the selection of a frequency candidate may mean that the controller 110 calculates a plurality of frequencies or stores them in the form of data.

In the step of selecting a frequency having a uniform pattern from among the frequency candidates ( S3400 ), the control unit 110 so that the pattern generated by the driving signal or the restoration signal is uniform in the area of the object irradiated with light or the entire pixel area for obtaining an image. ) may include selecting the frequency of the driving signal or the restoration signal.

13 is a diagram illustrating a shape in which a pattern progresses at an arbitrary point in time prior to one cycle in which the pattern is repeated, according to an exemplary embodiment.

Specifically, FIG. 13(a) is a diagram illustrating a relatively non-uniformly progressing pattern, and FIG. 13(b) is a diagram illustrating a relatively uniformly progressing pattern.

According to an embodiment, whether the pattern progresses uniformly may mean that the pattern progresses uniformly when the size of a space through which the pattern does not pass during the pattern progress is small.

For example, referring to FIGS. 13(a) and 13(b), FIG. 13(a) shows that the path along which the pattern proceeds is concentrated on a partial area of the object or some pixel area of the acquired image, and the pattern passes Since the size of the largest space is large, FIG. 13(a) may mean that the pattern has a relatively non-uniform pattern. However, in FIG. 13(b), the path through which the pattern proceeds spans the entire area of the object or the entire pixel area of the image to be acquired, so the size of the largest space through which the pattern does not pass is small, and FIG. 13(b) is relatively It may mean having a uniform pattern.

Hereinafter, for convenience of description, a space through which a pattern does not pass is expressed as a hole, and a size of the hole is expressed as a depth. Here, the depth may mean the area of the hole or the length of the hole along the first axis or the second axis. In this case, the unit indicating the depth may be expressed based on the metric system, which is the unit indicating the length, or may be expressed based on the number of pixels corresponding to the depth. Alternatively, the depth, which is the size of the hole, may be the smallest value among the distances from the center of the hole to the vertices of the hole. That is, when the hole has a shape similar to a quadrangle, the depth may mean the shortest distance from the center of the hole to each vertex.

According to an embodiment, the depth, which is the size of the hole, may be determined by the first axial disproportionate frequency or the second axial disproportionate frequency. Here, the first axial disproportionate frequency may mean a value obtained by dividing the first axial frequency by the greatest common divisor of the first axial frequency and the second axial frequency. It may mean a value obtained by dividing the 1st axis frequency and the 2nd axis frequency by the greatest common divisor.

14 is a graph illustrating a relationship between a depth and a first axis disjoint frequency according to an exemplary embodiment.

는 제1축 서로소 주파수를 의미하고, y축은 홀의 크기인 깊이를 의미한다. 또한, 그래프 내에서의 실선은 해당 주파수에서의 최대 FF를 의미하고, 점선은 해당 주파수의 최소 FF를 의미한다. The x-axis of Fig. 14

The first axis denotes a disjoint frequency, and the y-axis denotes the depth, which is the size of the hole. In addition, the solid line in the graph means the maximum FF at the corresponding frequency, and the dotted line means the minimum FF of the corresponding frequency.

Referring to FIG. 14 , as the first axis relative frequency increases, the depth may become smaller. In other words, in the case of frequencies in a similar band from the first axis frequency and the second axis frequency, the depth may be smaller as the GCD becomes smaller.

According to an embodiment, the depth of the largest hole during the pattern process may increase as the ratio of the first axis frequency to the second axis frequency approaches a simple integer ratio. Here, a simple integer ratio may mean that the second axis frequency is increased compared to the first axis frequency. Alternatively, a simple integer ratio may mean that when the GCD of the first axis frequency and the second axis frequency is 1, the second axis frequency is increased compared to the first axis frequency. In other words, approaching the simple integer ratio may mean that the ratio of the second axis frequency to the first axis frequency becomes smaller.

According to an embodiment, in order to acquire a plurality of frames per cycle in which the pattern is repeated, a first frequency with a high level and a small depth of a largest hole among nearby frequency candidates having the same GCD as the first and second frequencies initially selected A frequency and a second frequency may be provided.

1.4. Changing the mode of the imaging device

According to an embodiment, an image generating apparatus having a plurality of modes for generating an image may be provided.

For example, in order to obtain and provide an image and an image of an object, the image generating apparatus may provide a high-definition mode. Here, in order to provide the high-definition mode, a method in which the control unit 110 described above acquires one frame for each period in which the pattern is repeated may be used.

Alternatively, for example, in order to obtain and provide an image and an image of an object, the image generating apparatus may provide a high-speed mode. Here, in order to provide the high-speed mode, a method in which the above-described controller 110 acquires a plurality of frames at each period in which the pattern is repeated may be used. In other words, the high-speed mode may provide an image or video having an improved frame rate. Here, the frame rate may mean the number of frames obtained and provided by the image generating apparatus per second. Alternatively, the high-speed mode may provide an image or video in which motion artifacts caused by movement are reduced.

Alternatively, for example, the image generating apparatus may provide enlargement and reduction modes for the object. Here, in order to provide an enlargement or reduction mode for the object, the controller 110 may change the voltage of the driving signal input to the driving unit 130 or change the amplitude of the driving signal. That is, when the voltage or amplitude of the driving signal is increased, the driving range of the fiber 310 is increased, so that a reduced image of the object can be provided. Alternatively, when the voltage or amplitude of the driving signal is reduced, the range in which the fiber 310 is driven is reduced to provide an enlarged image of the object.

In addition, the plurality of modes may further include a high-definition providing mode using artificial intelligence including machine learning or neural networks in addition to the above-mentioned examples.

One. image correction

Hereinafter, when the phase of the restored signal for restoring the coordinate information or the pixel information is different from the phase of the signal constituting the pattern in which light is actually irradiated to the object and the obtained image is distorted, the controller 110 controls the phase of the restored signal A method of correcting .

Here, correcting the phase of the restored signal may include the controller 110 reflecting the phase correction value in the restored signal, and the controller 110 acquiring coordinate information based on the restored signal to which the phase correction value is reflected. .

1.1. Image Correction Method General

15 is a block diagram illustrating a method for obtaining, by an image generating apparatus, data in which a phase of a reconstructed signal is corrected, according to an exemplary embodiment.

15 , the method for the controller 110 to obtain an image in which the phase of the reconstructed signal is corrected includes obtaining optical information and obtaining time information (S1000), obtaining coordinate information based on the time information (S1000). S1200), substituting optical information into the coordinate information (S1400), obtaining a phase correction value to correct the phase of the restored signal (S1500), and obtaining an image (S1600).

4 and 15, in the method of obtaining the phase-corrected data, the image generating apparatus of FIG. 4 obtains data for reconstructing an image, by obtaining a phase correction value to obtain the phase of the reconstructed signal A step of correcting (S1500) may be included.

In order to obtain a phase correction value and correct the phase of the restored signal (S1500), the controller 110 uses artificial intelligence using deep learning or neural network learning to reduce distortion of the acquired image, or a phase correction algorithm Compensating the phase of the restored signal using a method such as correction of the coordinate information or pixel information obtained based on the restored signal accordingly.

16 is a diagram illustrating an image of an object reconstructed based on a reconstructed signal having a phase delay and an image of an original object, according to an exemplary embodiment.

Specifically, FIG. 16 (a) is a diagram illustrating that an image of an object is acquired based on a restored signal in which a phase delay occurs, and FIG. 16 (b) is an image of an object based on a restored signal in which a phase delay does not occur. It is a diagram showing that obtained.

Here, the delayed phase of the restored signal is the phase of the first axis signal and the second axis signal and the first axis signal and the second axis signal forming a pattern generated when light is irradiated to the object based on the driving signal. These can mean different things. That is, the fact that the phase delay of the restored signal does not occur may mean that the pattern in which light is irradiated to the object and the pattern based on the restored signal are the same or similar to each other.

In other words, when the phase of the restored signal is delayed, when coordinate information or pixel information is obtained based on the restored signal, optical information is obtained from the coordinate information or pixel information obtained based on the restored signal whose phase is not delayed. Compared to that, it may mean that it is acquired in other coordinate information or pixel information.

17 is a table schematically illustrating coordinate information and optical information corresponding to coordinate information based on a phase-delayed reconstruction signal according to an embodiment.

For example, referring to FIGS. 6 and 17 , when coordinate information is obtained based on a reconstructed signal whose phase is not delayed in FIG. 6 and optical information corresponding thereto is obtained, FIG. 17 is based on a reconstructed signal with a delayed phase This may mean that coordinate information is obtained and corresponding optical information is displayed. Here, when the optical information acquired at the x1, one of the first coordinate information and the y1 coordinate, which is one of the second coordinate information, is based on the reconstructed signal whose phase is not delayed, i1, one of the optical information, is obtained. However, when the phase is delayed, i2 may be obtained. That is, when the phase of the reconstructed signal is delayed, different optical information may be obtained in the coordinate information indicating the same coordinates as compared to the case where the phase of the reconstructed signal is not delayed.

As described above, as the phase of the reconstructed signal is delayed for a predetermined reason, the light information for reconstructing an image may not be obtained at the coordinates at which the original light information should be obtained, but may be obtained at other coordinates.

Here, the phase of the restored signal may occur because the actual driving signal and the signal through which the fiber 310 is driven are different from each other. Alternatively, the phase of the reconstructed signal may be delayed due to motion occurring when an actual user operates the image generating apparatus. Alternatively, the phase of the restored signal may be delayed due to a time difference until the light returning from the object is acquired by the light receiving unit 140 . Alternatively, when the driving unit 130 is driven by the driving signal, the phase of the restoration signal may be delayed because the driving unit 130 does not actually drive according to the driving signal. In addition to the above examples, the phase of the restored signal may be delayed due to physical characteristics caused by the driver 130 , the fiber 310 , and the light receiver 140 .

In addition, image distortion may occur in addition to the case where the phase of the restored signal is delayed.

18 is a schematic diagram illustrating an MC phenomenon when a fiber 310 is driven, according to an embodiment.

Here, the ellipse shown in FIG. 18 may indicate the movement of the end of the fiber 310 or may indicate the trajectory of the light irradiated onto the object.

Specifically, FIG. 18(a) illustrates the trajectory of light at the end of the fiber 310 or the object when the driving unit 130 drives the fiber 310 only along the first axis, according to an embodiment. have. Also, according to an exemplary embodiment, FIG. 18(b) may show a trajectory of light at an end of the fiber 310 or an object when the driving unit 130 drives the fiber 310 only along the second axis. .

According to an embodiment, even when the driving unit 130 drives the fiber 310 in only one axis, the fiber 310 may be driven in the other axis. Here, when the driving unit 130 drives the fiber 310 in one axis, driving the fiber 310 in the other axis may mean that the MC phenomenon has occurred.

For example, referring to FIGS. 18(a) and 18(b) , the axis on which the driving unit 130 intends to drive the fiber 310 may be an axis driven in the range R, but in reality, the driving unit 130 Actuation may occur in the axial direction, which is driven by an unintended range of r. In other words, the driving unit 130 may apply a force or signal to drive the fiber 310 in the first axis or the second axis by the R range, but the fiber 310 may apply r in the second axis or the first axis. It can be driven additionally as much as the range.

This may mean that the axis on which the driving unit 130 drives the fiber 310 and the axis on which the fiber 310 is resonance driven are different from each other, and thus the MC phenomenon occurs. Alternatively, when the frequency separation between the first axis and the second axis of the fiber 310 does not sufficiently occur, it may mean that the MC phenomenon occurs.

When the MC phenomenon occurs, the restored signal may acquire coordinate information by additionally acquiring a first axis MC signal and a second axis MC signal in addition to the first axis signal and the second axis signal. In other words, in order to restore the restored signal to a signal constituting a pattern in which light is actually irradiated to the object, in addition to acquiring the phase delay values of the first axis signal and the second axis signal, the additional first axis MC signal and the second axis signal It may be necessary to acquire the MC signal.

Here, the first axis MC signal may be the same as the frequency of the second axis signal, and similarly, the second axis MC signal may be the same as the frequency of the first axis signal. This is because, for example, when the MC phenomenon occurs, the fiber 310 is driven by the first axis and the second axis even though the driving signal input from the driving unit 130 is the first axis signal.

In addition, the control unit 110 sets the initial signal of the first axis MC signal and the second axis MC signal, in addition to correcting the phase delay of the first axis signal and the second axis signal from the initial signal of the restored signal, The phase delay of the uniaxial MC signal and the second axial MC signal may be corrected. This is because, based on the first axis MC signal and the second axis MC signal initially set by the controller 110 , the image can be obtained by correcting a difference from a pattern in which light is actually irradiated to the object.

Accordingly, apart from the phase delay, image distortion may occur as the MC phenomenon occurs, and the control unit 110 corrects the delayed phase of the restored signal or generates an MC phenomenon based on the restored signal. can be corrected.

19 is a block diagram illustrating a method for the controller 110 to correct a phase, according to an embodiment.

Referring to FIG. 19 , the method for the control unit 110 to correct the phase may include the control unit 110 obtaining an initial phase correction value (S4000) and obtaining a detailed phase correction value (S4200). have.

Here, the phase correction value may mean a value for correcting the delayed phase of the restored signal. In other words, the phase correction value may be a value added to or subtracted from the phase of the restored signal in order to correct the phase of the restored signal.

Here, the method for the controller 110 to correct the phase may be a step included in the step S1500 of correcting the phase of the restored signal by obtaining the phase correction value of FIG. 15 or the same step.

The step of obtaining the initial phase correction value (S4000) includes obtaining, by the controller 110, a phase that is approximately close to the delayed phase of the restored signal in the entire phase range of the restored signal in order to correct the delayed phase of the restored signal. can do. Here, the neighboring phase of the delayed phase of the restored signal in which the initial phase correction value is located may have a different neighboring range according to the initial phase correction method.

In the following related part, the control unit 110 obtaining the initial phase correction value will be described in detail.

In the step of obtaining a detailed phase correction value (S4200), the control unit 110 changes the phase of the restored signal to correct the delayed phase of the restored signal, to obtain a delayed phase value of the actual restored signal from the initial phase correction value, It may include generating coordinate information. Here, the detailed phase correction value may be the same as or substantially the same as the phase delay value of the actual restored signal.

In this case, the fact that the detailed phase correction value and the phase delay value of the actual restored signal are substantially the same may mean that the detailed phase correction value is within an error range from the phase delay value of the actual restored signal. Here, the error range may be determined by the quality of the image acquired by the image generating apparatus.

According to an embodiment, when the quality of the image provided by the image generating apparatus is high, the error range may be set small. In other words, the search phase unit searched by the controller 110 to obtain the detailed phase correction value may be set small.

According to another exemplary embodiment, when the quality of the image provided by the image generating apparatus is low, the error range may be set to be large. In other words, the search phase unit searched for by the controller 110 in order to obtain the detailed phase correction value may be set to be large.

In addition to the above-described embodiments, the controller 110 may search for a detailed phase correction value based on a fixed search phase unit to obtain a detailed phase correction value.

Searching for the phase correction value by the aforementioned controller 110 may mean acquiring a phase correction value, which will be described below.

1.2. Acquisition of initial phase correction values

Hereinafter, a method for the controller 110 to obtain an initial phase correction value will be described.

However, the initial phase correction does not mean that the controller 110 corrects only the initial phase of the restored signal, and the controller 110 may acquire a detailed phase correction value as a method for acquiring the initial phase correction value.

1.2.1. Types of Initial Phase Correction Methods

According to an embodiment, the user of the image generating apparatus may search for an initial phase correction value while directly changing the phase of the reconstructed signal.

For example, when the image generating apparatus includes a phase adjuster capable of adjusting the phases of the first axis signal and the second axis signal of the restored signal, the user may adjust the phase of the restored signal by using the phase adjuster. Here, the control unit 110 may generate coordinate information or pixel information based on the phase of the restored signal adjusted by the user using the phase control unit, and the display unit 160 may generate coordinate information or pixel information and light information based on the coordinate information or pixel information and light information. Images can be displayed. Accordingly, the user may acquire an image of the object while adjusting the phase of the reconstructed signal using the phase adjuster.

According to another embodiment, a random search method may be used for the controller 110 to perform initial phase correction.

For example, the random search method may include a method of selecting a phase similar to the delayed phase of the restored signal as an initial phase correction value for each phase by setting the phase of the restored signal to a plurality of arbitrary phase values. Accordingly, the controller 110 may obtain a detailed phase correction value based on the selected initial phase correction value.

According to another embodiment, in order for the controller 110 to perform the initial phase correction, an exhaustive search (brute-force search) method may be used.

For example, in the complete search method, the controller 110 sets the phase of the restored signal to each phase in the entire phase range of the restored signal, and selects a phase similar to the delayed phase of the restored signal for each phase as the initial phase correction value. methods may be included.

In addition, according to another embodiment, the controller 110 does not acquire coordinate information in a sine function domain, which is a form of a restored signal, in order to perform initial phase correction, but coordinate information in a phase domain. may be obtained to perform initial phase correction.

A method in which the controller 110 obtains the phase correction value of the restored signal in the phase domain will be described in detail in a related part below.

In addition to the above-mentioned embodiments, in order to obtain an initial phase correction value, the control unit 110 uses a convexity method using a tendency according to a change in the phase value of the reconstructed signal, artificial intelligence including machine learning or neural network learning. The initial phase correction value may be obtained based on the used lowest value search method or a typical algorithm for searching the lowest value.

1.2.2. Orbifold Method

Hereinafter, according to an embodiment, the controller 110 does not acquire coordinate information in a sine function domain, which is a form of a restored signal, in order to perform initial phase correction, but coordinates in a phase domain. A description will be given of obtaining information and performing initial phase correction.

Here, the domain may mean the dimension of the reconstructed signal used by the controller 110 to obtain coordinate information. In other words, the area may mean a space in which the control unit 110 arranges the restoration signal in order to obtain coordinate information.

According to an embodiment, the controller 110 may obtain coordinate information in the phase domain based on the orbifold method and perform phase correction of the restored signal. Here, the orbifold method may mean performing phase correction in a region other than the sine function region of the restored signal.

For example, when the reconstructed signal converts time information into coordinate information based on a sine function including a trigonometric function, the obtained coordinate information may mean that it is obtained in a sine function area, and the reconstructed signal is a sine function area can mean that

Hereinafter, a region in which the corrected phase value of the restored signal is obtained will be described.

1.2.2.1. Area where the correction phase value is obtained

According to an embodiment, the region of the reconstructed signal may be a sine function region.

For example, referring back to Equation 1, when the restored signal converts time information into coordinate information based on a sine function including a trigonometric function, the obtained coordinate information may mean that it is obtained in the sine function area, , may mean that the region of the restored signal is a sine function region.

According to another embodiment, the region of the restored signal may be a phase region.

[Equation 2]

Equation 2 is an equation representing a restored signal in the phase domain that can be used to convert time information into coordinate information, according to an embodiment.

는 제1축 진폭으로, 구동 신호 또는 복원 신호의 제1축으로의 진폭을 나타내고,

는 제1축 주파수로, 구동 신호 또는 복원 신호의 제1축으로의 주파수를 나타내고, t는 시간 정보를 나타내고,

는 제1축 위상으로, 구동 신호 또는 복원 신호의 제1축으로의 위상을 나타내며, 제1 축으로의 위상 지연 성분을 의미할 수 있다. 또한, y'는 위상 영역에서 변환된 제2축 위상 영역 좌표 정보를 나타내고,

는 제2축 진폭으로, 구동 신호 또는 복원 신호의 제2축으로의 진폭을 나타내고,

는 제2축 주파수로, 구동 신호 또는 복원 신호의 제2축으로의 주파수를 나타내고,

는 시간 정보를 나타내고,

는 제2축 위상으로, 구동 신호 또는 복원 신호의 제2축으로의 위상을 나타내며, 제2 축으로의 위상 지연 성분을 의미할 수 있다. 또한, mod는 modulus 연산자인 나머지 연산자를 의미할 수 있으며, T는 미리 정해진 주기를 의미할 수 있다. 즉, (mod T) 는 미리 정해진 주기마다 위상 영역 좌표 정보가 반복되는 것을 의미할 수 있다. 수식 2 및 다시 수식 1을 참조하면, 사인 함수 영역의 복원 신호에서 사인 함수의 변수로 사용되는 주파수, 시간 정보 및 위상을 기초로 위상 영역의 복원 신호가 획득될 수 있다. 다시 말해, 위상 영역의 복원 신호는 시간 정보에 대하여 사인 함수의 형식이 아닌, 1차 함수의 형식을 가질 수 있다. Referring to Equation 2, x' represents the first axis phase domain coordinate information transformed in the phase domain,

is the first axis amplitude, and represents the amplitude of the driving signal or the restored signal along the first axis,

is the first axis frequency, represents the frequency of the drive signal or the first axis of the restoration signal, t represents time information,

is the first axis phase, represents the phase of the driving signal or the restoration signal along the first axis, and may mean a phase delay component along the first axis. In addition, y' represents the second axis phase domain coordinate information transformed in the phase domain,

is the second axis amplitude, and represents the amplitude of the driving signal or the restored signal along the second axis,

is the second axis frequency, and represents the frequency of the driving signal or the restoration signal along the second axis,

represents time information,

is the second axis phase, indicating the phase of the driving signal or the restoration signal along the second axis, and may mean a phase delay component along the second axis. In addition, mod may mean a remainder operator that is a modulus operator, and T may mean a predetermined period. That is, (mod T) may mean that the phase domain coordinate information is repeated every predetermined period. Referring back to Equation 2 and Equation 1 again, the restored signal in the phase domain may be obtained based on frequency, time information, and phase used as variables of the sine function in the reconstructed signal in the sine function domain. In other words, the reconstructed signal in the phase domain may have a form of a first-order function, not a form of a sine function, with respect to time information.

Also, according to an embodiment, the first-axis phase region coordinate information or the second-axis phase region coordinate information of Equation 2 may be repeated at regular intervals as the acquired time information increases. In other words, referring to Equation 2, when the level at which the time information is increased according to the predetermined period T exceeds the predetermined period, the time information may be repeated back to the initial value. For example, when the predetermined period T is 2π, the first-axis phase domain coordinate information or the second-axis phase domain coordinate information may be repeated as an initial value every 2π, which is one period of the basic sine function. However, the present invention is not limited thereto, and the predetermined period T may be designated as various periods such as 2π or 4π. In addition to the aforementioned embodiments, for example, the region of the reconstructed signal may be obtained in various regions including a Fourier domain, a Laplace domain, and a z-transform domain. Here, the Fourier domain, Laplace domain, and z-transform domain of the reconstructed signal may be areas in which Fourier transform, Laplace transform, and z-transform are performed in the reconstructed function of the sine function domain, respectively.

20 is a diagram illustrating an image obtained according to a region of a reconstructed signal, according to an exemplary embodiment.

Specifically, FIG. 20 (a) is a diagram illustrating that the restored signal acquires an image of the object in the sine function domain, and FIG. 20 (b) is a diagram illustrating that the restored signal acquires an image of the object in the phase domain to be.

According to an embodiment, referring to FIG. 20 , the controller 110 may acquire an image using coordinate information acquired in the sine function domain and an image using coordinate information acquired in the phase domain. Here, the acquisition of the image may mean a step of acquiring coordinate information using a reconstructed signal and substituting optical information for each coordinate information.

Here, the number of coordinate information acquired in the phase domain may be greater than the number of coordinate information acquired in the sine function domain.

For example, referring back to Equation 1 and Equation 2, Equation 1 and Equation 2 respectively indicate the sine function region of the restored signal, and Equation 2 indicates the phase region of the restoration function. In this case, referring to Equation 2, the first-axis phase region coordinate information is a linear function for time information, and one piece of coordinate information for one piece of time information may be obtained. However, referring to Equation 1, the first-axis coordinate information Information is a sine function for time information, and one piece of coordinate information may be obtained for two or more pieces of time information.

Accordingly, the image obtained by the control unit 110 using the coordinate information obtained in the phase domain is an image obtained by the control unit 110 using the coordinate information obtained in the sine function domain, in which the upper, lower, left and right sides are symmetrical. may be provided in the form.

In addition, the coordinate information obtained in the phase domain may be more than the coordinate information obtained in the sine function domain. As a specific example, the number of coordinate information acquired in the phase domain may be four times or more than the number of coordinate information acquired in the sine function domain.

In addition, since the coordinate information obtained in the phase region has a symmetric shape compared to the coordinate information obtained in the sine region, the number of pixel information obtained based on the coordinate information obtained in the phase region is obtained in the sine region. It may be more than the number of pixel information obtained based on the coordinate information.

As a specific example, when pixel information obtained in the sine function domain has a number of 512 * 512 in the first axis and the second axis, respectively, pixel information obtained in the phase domain is obtained in the first axis and second axis The number may be 1024*1024.

However, the exemplary embodiment is not limited thereto, and the pixel information obtained in the phase region may have various numbers of pixels. Specifically, the number of pixels may be 512*512, 2048*2048, 4096*4096, or the like, or the user may arbitrarily set the number of pixel information.

1.2.2.2. Phase correction method using Orbifold method

Hereinafter, a method for the control unit 110 to correct the phase of the restored signal using the orbifold method according to an embodiment will be described.

21 is a diagram illustrating an image of a phase region in which a phase delay of a restored signal does not occur and an image in which a phase delay of a restored signal occurs using coordinate information obtained in the phase region, according to an embodiment.

According to an embodiment, when referring to FIG. 21 , when a phase delay does not occur in the restored signal, the image in the phase domain obtained using coordinate information obtained in the phase domain is the midpoint of the image acquired in the phase domain. may be symmetric with respect to .

In other words, when a phase delay occurs in the restored signal, the image acquired in the phase region may not be symmetric with respect to the midpoint of the acquired image.

Accordingly, when a symmetric phase of an image obtained in the phase domain is searched for by using the coordinate information obtained in the phase domain, the controller 110 may obtain a phase delay value of the reconstructed signal. In other words, an image obtained based on the coordinate information obtained in the phase domain is symmetrical with respect to the midpoint of the first and second axes of the phase domain coordinate information, but in the case of a restored signal with a phase delay, in the phase domain When an image obtained based on the obtained coordinate information is symmetrical at a position deviating from the midpoint of the first and second axes of the phase domain coordinate information, and accordingly, a symmetrical phase is searched for at a location deviating from the midpoint, the control unit (110) may obtain a phase delay value of the restored signal.

22 is a block diagram illustrating a method for the controller 110 to obtain an initial phase correction value of a reconstructed signal based on the symmetry of phase domain coordinate information, according to an embodiment.

Referring to FIG. 22 , in the method for the controller 110 to obtain the initial phase correction value of the restored signal, the controller 110 substitutes the optical information into the phase domain coordinate information ( S4020 ), and the controller 110 performs the phase It may include a step of determining the symmetry in the region coordinate information (S4040) and a step of the controller 110 obtaining an initial phase correction value (S4060).

Here, the method in which the controller 110 obtains the initial phase correction value of the restored signal may be the same step as or included in the above-mentioned step S4000 in which the controller 110 acquires the initial phase correction value.

23 is a table schematically illustrating optical information acquired in coordinate information acquired in a phase domain of a reconstructed signal in response to time information, according to an embodiment.

According to an embodiment, referring to FIGS. 22 and 23 , in the step of the controller 110 substituting the optical information into the phase domain coordinate information ( S4020 ), the controller 110 corresponds to the time information in the phase domain of the restored signal. to obtain coordinate information, and may include obtaining optical information corresponding to the obtained coordinate information.

Here, when the control unit 110 acquires coordinate information in the phase domain, as mentioned above, regardless of whether the light receiving unit 140 acquires the light information, the control unit 110 determines the time based on a predetermined time interval. It may mean acquiring information and acquiring coordinate information based on the acquired time information.

For example, referring back to Equation 2, the controller 110 may obtain first-axis phase domain coordinate information and second-axis phase domain coordinate information transformed in the phase domain based on time information. Accordingly, the controller 110 may make the optical information corresponding to the time information correspond to the coordinate information obtained in the phase domain. In other words, the controller 110 may acquire data so that the optical information corresponds to the coordinate information obtained in the phase domain.

24 is a graph illustrating summing light information for each coordinate information based on coordinate information obtained in a phase domain, according to an embodiment.

Specifically, in Fig. 24(a), the horizontal axis indicates the first-axis phase region coordinate information, and the vertical axis indicates the sum of the optical information. In addition, in Fig. 24(b), the horizontal axis indicates the second-axis phase region coordinate information, and the vertical axis indicates the sum of the optical information. However, the present invention is not limited thereto, and the vertical axis may be a product of optical information or an integral value of optical information according to phase domain coordinate information. Hereinafter, for convenience of explanation, it will be described that the vertical axis represents the sum of optical information.

Here, according to an embodiment, the sum of light information may mean the sum of at least one or more pieces of light information obtained from each phase domain coordinate information.

For example, when one piece of first-axis phase region coordinate information is fixed, a plurality of pieces of light information may correspond to coordinate positions indicated by the fixed first-axis coordinate information and a plurality of non-fixed second-axis phase region coordinate information. and at least one or more pieces of optical information among the above optical information may be combined. In other words, in a two-dimensional Cartesian coordinate system, the x-axis is fixed and the summation may be performed using values of at least one or more y-axis coordinates among the entire y-axis range. Similarly, when the second-axis phase region coordinate information is fixed, the sum of the optical information may be possible in the same manner as described above.

According to another embodiment, the sum of light information may mean representing an average after at least one piece of light information obtained from each phase domain coordinate information is summed.

22 and 24, the step of the controller 110 determining the symmetry in the phase domain coordinate information (S4040) is performed by the controller 110 on the first axis phase domain coordinate information or the second axis phase domain coordinate information. It may include a method of determining symmetry in specific phase domain coordinate information.

Here, the symmetry indicates that the sum of the optical information or the optical information obtained from the coordinate information separated by the same distance - the same coordinate information distance - based on the specific first-axis phase region coordinate information or the specific second-axis phase region coordinate information is the same or similar can mean that

Also, determining the symmetry may mean that the first value and the last value of the first axis phase region coordinate information or the second axis phase region coordinate information are determined in a situation in which they are continuous. For example, in the first axis phase region coordinate information, the first value x'1 and the last value x'n are consecutive values, and a value at the same distance from x'1 is x', which is the next value of x'1. 2 and x'n.

According to an embodiment, in order for the control unit 110 to determine the symmetry in the phase domain coordinate information, the control unit 110 controls the specific first axis based on the first axis phase domain coordinate information and the second axis phase domain coordinate information. It may be determined based on the difference between the sum of the optical information in the coordinate information separated by the same distance from the axial phase region coordinate information or the second axis phase region coordinate information.

Here, what the controller 110 calculates based on the difference between the sums of the optical information may be a value obtained by adding all the difference values of the sums of the optical information in the plurality of phase domain coordinate information acquired by the controller 110 .

For example, referring to FIG. 23, when the first axis phase domain coordinate information, x'1, x'2, x'3, x'4, and x'5, is sequential in the coordinate information in the phase domain, Based on x'3, the difference between the sum of the optical information acquired in the x'1 coordinate information and the optical information acquired in the x'5 coordinate information, the sum of the optical information acquired in the x'2 coordinate information, and the x'4 coordinates It is possible to obtain the sum of the acquired optical information in the information. Accordingly, if it is symmetric based on the x'3 coordinate information, the difference value of the sum of the optical information of the x'1 and x'5 coordinate information based on the x'3 coordinate information and the x'2 and x'4 coordinates The difference value of the sum of the optical information of the information may be smaller than that based on other phase domain coordinate information.

Similarly, the method of determining the symmetry of the second-axis phase domain coordinate information in the above-mentioned first-axis phase domain coordinate information may be used.

According to another embodiment, in order to determine the symmetry in the phase domain coordinate information, the control unit 110 controls the first specific first axis phase domain coordinate information or the second axis phase domain coordinate information as a reference. The sum of the optical information from the axial phase region coordinate information or the second axis phase region coordinate information to the coordinate information separated by the same distance may be integrated.

In addition, according to another embodiment, in order to determine the symmetry in the phase domain coordinate information, the control unit 110 controls a specific first axis phase domain coordinate information or a specific second axis phase domain coordinate information based on the second axis phase domain coordinate information. It may be determined based on the multiplication between the sum of the optical information in the coordinate information separated by the same distance from the uniaxial phase region coordinate information or the second axis phase region coordinate information.

In the above-mentioned embodiments, the specific first-axis phase domain coordinate information or the specific second-axis phase domain coordinate information may be coordinate information predetermined for determining symmetry. In other words, coordinate information as a reference for determining symmetry may be predetermined, and accordingly, it is possible to determine all of the symmetry from each of the coordinate information on the first axis phase region coordinate information or the second axis phase region coordinate information. have. That is, the first-axis phase region coordinate information or the second-axis phase region coordinate information for determining symmetry may be at least one piece of coordinate information.

Referring to FIG. 22 , the step ( S4060 ) of the controller 110 acquiring the initial phase correction value is the symmetry determined from the specific first-axis phase region coordinate information or the specific second-axis phase region coordinate information determined by the controller 110 previously ( S4060 ). It may include obtaining an initial phase correction value based on .

According to an embodiment, the control unit 110 determines the symmetry in each of the plurality of coordinate information, obtains the most symmetrical first-axis phase region coordinate information or specific second-axis phase region coordinate information, and obtains the obtained coordinates A phase corresponding to the information may be obtained as an initial phase correction value of the reconstructed signal.

For example, when the sum of the difference values of the sums of the optical information obtained from the coordinate information located at the same distance based on the specific first-axis phase region coordinate information is the smallest, the controller 110 controls the specific first axis A phase corresponding to the phase domain coordinate information may be obtained as an initial phase correction value of the reconstructed signal.

25 is a block diagram illustrating a procedure for obtaining an approximate phase correction value of an initial phase correction value, according to an embodiment.

22 and 25 , the step of the controller 110 obtaining an approximate phase correction value of the initial phase correction value ( S4100 ) is performed after the controller 110 acquiring the initial phase correction value ( S4060 ). (110). In other words, the step (S4100) of the controller 110 acquiring the approximate phase correction value of the initial phase correction value is to be performed by the controller 110 before the step (S4200) of the controller 110 acquiring the detailed phase correction value. can

According to an embodiment, in the step (S4100) of the controller 110 obtaining the approximate phase correction value of the initial phase correction value, the controller 110 selects the initial phase correction value and the phase domain coordinate information corresponding to the initial phase correction value. and obtaining approximate phase domain coordinate information close to the detailed phase correction value and a phase value corresponding to the approximate phase domain coordinate information based on the symmetry of .

For example, referring to FIGS. 23 and 25 , when the first-axis phase region coordinate information corresponding to the initial phase correction value obtained by the controller 110 is x′2, it corresponds to the first-axis approximate phase correction value. The approximate first-axis phase region coordinate information to The first axis phase region coordinate information having a value of 0 or close to 0 may be obtained.

와 같이 x 값이 b인 지점에서 좌우 대칭인 함수를 의미할 수 있다. 즉, x'1, x'2 및 x'3와 각각의 좌표 정보에 대응하는 광 정보의 합을 위 수식의 각각 x및 y에 대입하는 경우, 좌우 대칭을 이루는 근사 제1축 위상 영역 좌표 정보인b가 획득될 수 있다. 이에 다라, 근사 제1축 위상 영역 좌표 정보에 대응되는 근사 위상 보정 값이 제어부(110)에 획득될 수 있다. Here, for example, the left-right symmetric function to approximate is

It can mean a function that is symmetrical at the point where the x value is b as shown in Fig. That is, when the sum of x'1, x'2, and x'3 and the light information corresponding to each coordinate information is substituted for x and y in the above equations, the approximate first-axis phase region coordinate information forming left-right symmetry In b can be obtained. Accordingly, an approximate phase correction value corresponding to the approximate first-axis phase region coordinate information may be obtained from the controller 110 .

Also, the approximate second-axis phase region coordinate information and the second-axis approximate phase correction value may be obtained in the same manner as in the above method of obtaining the approximate first-axis phase region coordinate information and the first-axis approximate phase correction value.

According to an embodiment, the approximate phase correction value obtained in the step (S4100) of the controller 110 acquiring the approximate phase correction value of the initial phase correction value is the approximate phase correction value obtained in the step (S4200) of the controller 110 acquiring the detailed phase correction value ) can be used in

1.2.2.3. Mechanical coupling correction method using Orbifold method

26 is a diagram illustrating an image obtained when the MC phenomenon does not occur and an image obtained when the MC phenomenon does not occur using coordinate information obtained in the phase domain, according to an embodiment.

Specifically, referring to Fig. 26, Fig. 26 (a) is a view showing an image obtained based on the phase domain coordinate information obtained when the phase delay and MC phenomenon do not occur, and Fig. 26 (b) is the phase delay It is a diagram showing an image obtained based on the phase domain coordinate information obtained when the MC phenomenon does not occur, but is obtained.

According to an embodiment, based on the phase domain coordinate information, the control unit 110 may obtain whether an MC phenomenon has occurred, and when the MC phenomenon has occurred, the control unit 110 includes optical information corresponding to the phase domain coordinate information. Based on these factors, it is possible to correct the MC phenomenon.

In other words, the controller 110 may acquire the first axis MC signal and the second axis MC signal based on the optical information obtained in the phase domain coordinate information.

For example, when the controller 110 acquires the phases of the first-axis MC signal and the second-axis MC signal based on the phase domain coordinate information, the controller 110 uses the restored signal as the first-axis signal and the second-axis signal. In addition to the signal, the image may be reconstructed in consideration of the first axis MC signal and the second axis MC signal.

Here, the controller 110 uses the phases of the first axis signal, the second axis signal, the first axis MC signal, and the second axis MC signal as variables to obtain the first axis MC signal and the second axis MC signal. Operations can be performed based on the rotation matrix. In addition, the controller 110 may acquire the phases of the first axis signal, the second axis signal, the first axis MC signal, and the second axis MC signal as a result of the operation.

1.3. Acquisition of detailed correction values of phase

Hereinafter, a method for the controller 110 to obtain a detailed phase correction value will be described.

However, the detailed phase correction does not mean that the controller 110 acquires the detailed phase correction value only after acquiring the initial phase correction value for the phase of the restored signal, and the controller 110 does not acquire the initial phase correction value An initial phase correction value may be obtained by performing a method of obtaining a detailed phase correction value or using a method for obtaining a detailed phase correction value.

1.3.1. Detailed correction method of phase General

27 is a block diagram illustrating a method for the controller 110 to obtain a detailed phase correction value, according to an embodiment.

Specifically, referring to FIG. 27 , the method for the control unit 110 to obtain the detailed phase correction value includes the steps of the control unit 110 obtaining a difference value between the optical information obtained for each pixel information ( S4220 ) and the control unit Correcting the phase of the restored signal so that the difference value between the optical information obtained by 110 is minimized ( S4240 ) may be included.

Here, referring to FIGS. 19 and 27 , the method for the controller 110 to obtain the detailed phase correction value may be included in or the same step as the step ( S4200 ) of the previous controller 110 acquiring the detailed phase correction value. .

28 is a schematic diagram illustrating a plurality of pieces of light information acquired for one piece of pixel information, according to an embodiment. The obtained plurality of optical information may include a first optical information set and a second optical information set.

Here, the first optical information set and the second optical information set may be optical information acquired at different times. In addition, each of the first optical information set and the second optical information set may include at least one or more optical information.

For example, the first optical information set may be optical information corresponding to continuous time information, and the second optical information set is a continuous set of optical information after a predetermined time has elapsed from the continuous time information obtained by the first optical information set. It may be optical information corresponding to time information.

As a specific example, when the first optical information set and the second optical information set each include three pieces of optical information, the optical information corresponding to the first optical information set corresponds to 1 microsecond, 1.1 microseconds, and 1.2 microseconds. may be optical information obtained by doing so, and the optical information corresponding to the second optical information set may be optical information acquired corresponding to 5 microseconds, 5.1 microseconds, and 5.2 microseconds. Here, time information may be acquired in units of 0.1 microseconds, and accordingly, optical information may also be acquired in units of 0.1 microseconds. However, the time information at which the first optical information set and the second optical information set are acquired is not limited to the above example, and a pattern generated according to a unit time at which time information is acquired and a driving signal or a restoration signal is completed once. It may vary depending on the time required.

In other words, the difference in the time information at which the first optical information set and the second optical information set are acquired is a pattern generated by a driving signal or a restoration signal in pixel information for which the first optical information set and the second optical information set are acquired. This can mean intersecting.

Referring to FIGS. 27 and 28 , in the step S4220 , in which the control unit 110 obtains a difference value between the light information obtained for each pixel information, the control unit 110 receives the light corresponding to the coordinate information obtained for the pixel information. and obtaining a difference value between the information.

According to an embodiment, the pixel information may mean location information on which a single pixel is located among all pixels, and the pixel information may include a plurality of coordinate information.

In other words, a plurality of pieces of coordinate information may represent one pixel information.

For example, the first light information set may be composed of a plurality of pieces of light information corresponding to a plurality of pieces of coordinate information, and a position indicated by a plurality of pieces of coordinate information constituting the first light information set indicates a position within one pixel information. can point to In other words, although a plurality of pieces of coordinate information may indicate different positions, one piece of pixel information may include different positions indicated by a plurality of pieces of coordinate information.

This may mean that a plurality of pieces of light information can be obtained in one pixel information.

According to an embodiment, the difference value of the plurality of pieces of light information may mean including a difference, average, variance, and standard deviation between the pieces of light information.

For example, a difference between a value obtained by adding light information constituting the first light information set and a value obtained by adding light information constituting the second light information set may mean a difference value between a plurality of pieces of light information.

As another example, an average optical information value of at least some of the optical information constituting the first optical information set and the second optical information set may mean a difference value between the plurality of optical information.

Also, as another example, dispersion of a plurality of optical information from an average optical information value of at least some of the optical information constituting the first optical information set and the second optical information set may mean a difference value of optical information.

Also, as another example, the standard deviation of the plurality of optical information from the average optical information value of at least some of the optical information constituting the first optical information set and the second optical information set may mean a difference value of optical information. .

However, the present invention is not limited to the above example, and obtaining a difference value between light information may mean indicating that a plurality of pieces of light information obtained for pixel information are uniform. Here, that the plurality of pieces of optical information is uniform may mean whether the plurality of pieces of acquired optical information have the same or similar optical information.

Here, when the phase delay of the restored signal does not occur, a plurality of pieces of light information obtained for pixel information may all have the same value. That is, the difference value between the plurality of pieces of light information may be 0 or a value close to 0.

However, when a phase delay of the restored signal occurs, a difference value between a plurality of pieces of optical information obtained in pixel information may be generated. That is, as the phase-delayed value of the reconstructed signal increases, the difference value between the plurality of pieces of optical information obtained in the pixel information may increase.

Referring to FIG. 27 , in the step S4240 of the controller 110 correcting the phase of the restored signal so that the difference value between the optical information is minimized, the phase of the restored signal is changed and the difference value between the optical information obtained from the pixel information. The control unit 110 may include determining whether this is minimized.

According to an embodiment, the user of the image generating apparatus may manually change the phase of the restored signal and adjust the difference value between the optical information acquired by the controller 110 to be the minimum.

According to another embodiment, the controller 110 may change the phase of the restored signal so that the difference between the optical information obtained in the pixel information is minimized while changing the phase of the restored signal in a minimum unit capable of changing. .

According to another embodiment, the controller 110 may change the phase of the restored signal so that a difference value between optical information obtained from pixel information is minimized while arbitrarily changing the phase of the restored signal.

According to another embodiment, the controller 110 may change the phase of the restored signal so that a difference value between optical information obtained from pixel information is minimized while changing the phase of the restored signal in a predetermined phase adjustment unit. .

In the above-mentioned embodiments, the controller 110 may obtain a difference value between the optical information obtained in the pixel information whenever the phase is adjusted, but the present invention is not limited thereto and the controller 110 restores at least one in advance. A difference value between the optical information obtained in the pixel information may be obtained based on the phase value of the signal.

29 is a block diagram illustrating a method for the controller 110 to obtain a detailed phase correction value by comparing a minimum value between optical information acquired in pixel information while adjusting a phase of a restored signal, according to an exemplary embodiment; .

Referring to FIG. 29 , the control unit 110 compares the minimum values between the optical information obtained in pixel information while adjusting the phase of the restored signal and obtains the detailed phase correction value, the control unit 110 controls each pixel. After obtaining a difference value between the optical information obtained in the information (S4220), the controller 110 adjusts the phase of the restored signal (S4242), the controller 110 adjusts the phase of the restored signal, each Comparing the difference value between the optical information before and after adjusting the phase of the restored signal before the control unit 110 adjusts the phase of the restored signal (S4244) It may include step S4246 and a step of correcting the phase of the restored signal by the controller 110 to the phase value of the restored signal when the difference value before adjusting the phase of the restored signal is obtained (S4248).

Referring to FIG. 29 , in the step S4220 , in which the controller 110 obtains a difference value between the optical information acquired for each pixel information, the controller 110 of FIG. 27 obtains the optical information acquired for each pixel information. It may be the same step as the step of obtaining a difference value ( S4220 ).

Referring to FIG. 29 , the step ( S4242 ) of the controller 110 adjusting the phase of the restored signal may include a method in which the controller 110 adjusts the phase of the restored signal based on the aforementioned embodiments. .

According to an embodiment, when the controller 110 adjusts the phase of the restored signal, the controller 110 may adjust the phase of the restored signal based on a predetermined phase adjustment unit.

A predetermined phase adjustment unit for the control unit 110 to adjust the phase of the restored signal will be described in detail in a related part below.

According to another embodiment, when the controller 110 adjusts the phase of the restored signal, the controller 110 may arbitrarily adjust the phase of the restored signal.

According to another embodiment, when the controller 110 adjusts the phase of the restored signal, the controller 110 may adjust the phase of the restored signal based on the minimum phase unit capable of adjusting the phase of the restored signal.

Referring to FIG. 29 , after the controller 110 adjusts the phase of the reconstructed signal, the step of obtaining the optical information difference value obtained for each pixel information ( S4244 ) is that the controller 110 obtains each pixel information. In step S4220 of obtaining a difference value between the optical information used, the method may include a method in which the controller 110 acquires a difference value between the optical information acquired for each pixel information.

Here, when the controller 110 adjusts the phase of the restored signal, the optical information obtained for each pixel information may be different from the optical information before the controller 110 adjusts the phase of the restored signal. In other words, when the controller 110 adjusts the phase of the restored signal, the coordinate information obtained based on the restored signal may be different from the coordinate information before the controller 110 adjusts the phase of the restored signal, Accordingly, the optical information corresponding to the coordinate information included in the pixel information may be changed before and after the controller 110 adjusts the phase of the reconstructed signal.

Referring to FIG. 29 , in the step of comparing the difference value between the optical information before the controller 110 adjusts the phase of the restored signal and after adjusting the phase of the restored signal ( S4246 ), the controller 110 controls the restored signal. Obtaining the difference value of the optical information obtained from the pixel information before and after adjusting the phase of and comparing a difference value of the obtained light information to the pixel information.

In this case, the control unit 110 compares the difference value of the optical information obtained from the pixel information before adjusting the phase of the reconstructed signal with the difference value of the light information obtained from the pixel information after adjusting the phase of the reconstructed signal. That is, the controller 110 may compare the difference value of the optical information obtained immediately before the step of adjusting the phase of the restored signal with the difference value of the optical information obtained immediately after the step of adjusting the phase of the restored signal.

For example, when the step of the controller 110 adjusting the phase of the restored signal exists at least once, the difference value of the optical information compared by the controller 110 is after the phase adjustment before the last phase adjustment and the last phase This may mean comparing the difference value of the light information obtained from the pixel information before the adjustment with the difference value of the light information obtained from the pixel information after the last phase adjustment.

Hereinafter, for convenience of explanation, the difference value of the optical information obtained from the pixel information before the controller 110 adjusts the phase of the restored signal may be expressed as the optical information difference value before the phase adjustment, and the controller 110 After the phase of the restored signal is adjusted, the difference value of the optical information obtained from the pixel information may be expressed as the optical information difference value after the phase adjustment.

Here, when the optical information difference value before the phase adjustment is greater than the optical information difference value after the phase adjustment, the controller 110 may adjust the phase of the restored signal again. In other words, when the optical information difference value before the phase adjustment is greater than the optical information difference value after the phase adjustment, the controller 110 adjusts the phase of the restored signal ( S4242 ) may be performed again.

Here, if the optical information difference value before the phase adjustment is smaller than the optical information difference value after the phase adjustment, the controller 110 controls the restored signal based on the phase adjusted before the controller 110 finally adjusts the phase of the restored signal. can restore the status of In other words, when the optical information difference value before the phase adjustment is smaller than the optical information difference value after the phase adjustment, the controller 110 restores the difference value before the controller 110 adjusts the phase of the restored signal when the difference value is obtained Correcting the phase of the restored signal with the phase value of the signal ( S4248 ) may be performed.

Referring to FIG. 29, the step of correcting the phase of the restored signal with the phase value of the restored signal when the difference value before the controller 110 adjusts the phase of the restored signal is obtained (S4248) is performed by the controller 110 Finally, it may include correcting the phase of the restored signal based on the phase of the restored signal adjusted just before adjusting the phase of the restored signal.

Here, the phase of the restored signal adjusted just before the controller 110 finally adjusts the phase of the restored signal may mean the phase value of the restored signal that is the basis for obtaining the optical information difference value before the phase adjustment. . In other words, the phase of the restored signal adjusted just before the control unit 110 last adjusts the phase of the restored signal is the difference between the restored signal when the difference value before the controller 110 adjusts the phase of the restored signal is obtained. When the step of adjusting the phase of the restored signal by the controller 110 is included before the step of correcting the phase of the restored signal with the phase value ( S4248 ) is included, the restored signal before finally adjusting the phase of the restored signal can be obtained based on the phase of .

Here, as described above, correcting the phase of the restored signal may include obtaining the coordinate information by the controller 110 based on the phase correction value of the restored signal.

In this case, the phase value used by the controller 110 to correct the phase of the restored signal may be the detailed phase correction value.

30 is a block diagram illustrating a method for the controller 110 to obtain a detailed phase correction value while additionally adjusting a phase of a restored signal, according to an embodiment.

Referring to FIG. 30 , the method for the controller 110 to obtain a detailed phase correction value while additionally adjusting the phase of the restored signal includes the steps of the controller 110 adjusting the phase of the restored signal ( S5000 ), the controller 110 . ) after adjusting the phase of the restored signal, obtaining the optical information difference value obtained for each pixel information ( S5200 ) and before the controller 110 adjusts the phase of the restored signal and adjusting the phase of the restored signal Comparing the difference values between the subsequent light information (S5400) may be included.

According to an embodiment, the controller 110 adjusts the phase of the restored signal in a predetermined phase adjustment unit, and then acquires the phase of the restored signal corresponding to the minimum difference value of the optical information, and then adjusts the predetermined phase By adjusting the phase of the reconstructed signal in a unit smaller than the unit, a minimum difference value of optical information may be obtained, and a phase correction value of the reconstructed signal corresponding to a minimum optical information difference value may be obtained.

For example, referring to FIGS. 29 and 30 , the method for the controller 110 to obtain a detailed phase correction value while additionally adjusting the phase of the restored signal is performed by the controller 110 in FIG. Comparing the difference value between the optical information before adjusting the phase and after adjusting the phase of the restored signal (S4246) and restoration when the difference value before the controller 110 adjusts the phase of the restored signal is obtained It may be performed by the controller 110 between the steps of correcting the phase of the restored signal with the phase value of the signal ( S4248 ).

Referring to FIG. 30 , the step (S5000) of the controller 110 adjusting the phase of the restored signal is that the controller 110 adjusts the phase of the restored signal based on a smaller phase adjustment unit than the previous predetermined phase adjustment unit. may include

For example, when the controller 110 adjusts the phase of the restored signal by the first phase adjustment unit in step S4242 of the controller 110 adjusting the phase of the restored signal, the controller 110 controls the phase of the restored signal In the step of adjusting ( S5000 ), the controller 110 may adjust the phase of the restored signal based on a second phase adjustment unit smaller than the first phase adjustment unit.

As a specific example, when the first phase adjustment unit is 0.1 seconds, the second phase adjustment unit may be set to 0.05 seconds which is smaller than the first phase adjustment unit, and the controller 110 controls the restored signal based on the first phase adjustment unit. After obtaining the phase of the restored signal in which the optical information difference value obtained from the pixel information is minimized by adjusting the phase of It is possible to obtain a phase of the reconstructed signal in which the optical information difference value obtained from the two is minimized.

29 and 30 , after the controller 110 adjusts the phase of the restored signal, obtaining a difference value of optical information obtained for each pixel information ( S5200 ) and the controller 110 performs the phase of the restored signal Comparing the difference value between the optical information before and after adjusting the phase of the restored signal ( S5400 ) is optical information obtained from each pixel information after the controller 110 adjusts the phase of the restored signal Same or similar to the step of obtaining a difference value (S4244) and comparing the difference value between the optical information before the controller 110 adjusts the phase of the reconstructed signal and after adjusting the phase of the reconstructed signal (S4246) may be a step.

In other words, after the controller 110 adjusts the phase of the restored signal, obtaining a difference value of optical information obtained for each pixel information ( S5200 ) and before the controller 110 adjusts the phase of the restored signal and restored Comparing the difference value between the optical information after adjusting the phase of the signal ( S5400 ) may be performed by the controller 110 in the same manner as the method used in the aforementioned step.

1.3.2. Predetermined Phase Adjustment Units

Hereinafter, in order for the controller 110 to adjust the phase of the restored signal, a predetermined phase adjustment unit, which is a unit for adjusting the phase, will be described.

Here, the predetermined phase adjustment unit may be expressed as a dip.

31 is a diagram illustrating that the shape of a pattern generated as a phase of a driving signal or a restoration signal is changed is repeated, according to an exemplary embodiment;

Specifically, FIGS. 31A and 31C show the same pattern shape, but may be a pattern in which the phase of the driving signal or the restoration signal is different by a predetermined phase adjustment unit. Fig. 31(b) shows the shape of a pattern different from that of Fig. 31(a) or Fig. 31(c), which is predetermined from the phase of the driving signal or the restoration signal that is the basis of Fig. 31(a) or Fig. 31(c). The pattern may be different by half of the phase adjustment unit.

According to an embodiment, whenever the phase of the first axis signal or the phase of the second axis signal of the driving signal or the restoration signal is adjusted or changed by a predetermined phase adjustment unit, the shape of the pattern indicated by the driving signal or the restoration signal is repeated can be In other words, when the pattern indicated by the driving signal or the restoration signal is repeated, the phase of the first axis signal or the phase of the second axis signal of the driving signal or the restoration signal may differ by a predetermined phase adjustment unit.

For example, referring to FIG. 31 , when the phase of the driving signal or the restoration signal is adjusted from the driving signal or the restoration signal, which is the basis of FIG. The pattern in Fig. 31(c) can be shown. Here, the patterns of FIGS. 31(a) and 31(c) may have the same shape as each other, and in this case, the phase of the driving signal or the restoration signal that is the basis of FIG. 31(a) and the phase of FIG. 31(c) The phases of the driving signal or the restoration signal may be different from each other by a dip, which is a predetermined phase adjustment unit.

32 is a diagram illustrating that FF is repeated according to a phase of a first-axis signal and a phase of a second-axis signal of a driving signal or a restoration signal, according to an embodiment.

In FIG. 32 , the x-axis represents the phase of the first-axis signal of the driving signal or the restored signal, and the y-axis represents the phase of the second-axis signal of the driving signal or the restored signal.

In addition, the fact that the colors shown in FIG. 32 are identical to each other indicates that the patterns represented by the driving signal or the restoration signal have the same or similar FFs. Here, the color shown in FIG. 32 may indicate that the FF increases as the brightness increases, that is, from black to white.

In this case, referring to FIG. 32 , the color shown in FIG. 32 may mean a difference value of light information obtained for each pixel information of an image in addition to FF.

According to an embodiment, whenever the phase of the driving signal or the restoration signal is adjusted or changed by a predetermined phase adjustment unit, the FF indicated by the driving signal or the restoration signal may be repeated. In other words, whenever the first axis signal or the second axis signal of the driving signal or the restoration signal is changed by a dip, the FF of the driving signal or the restoration signal may be the same.

Specifically, referring to FIG. 32 , as the phase of the first axis signal or the phase of the second axis signal of the driving signal or the restoration signal is changed, FF may be repeatedly changed, and in this case, the first axis signal in which FF is repeated A phase of or an interval between the phases of the second axis signal may be a dip, which is a predetermined phase adjustment unit.

[Equation 3]

는 구동 신호 또는 복원 신호의 제1축 주파수를 나타내고,

는 구동 신호 또는 복원 신호의 제2축 주파수를 나타낸다. Referring to Equation 3, dip represents a predetermined phase adjustment unit, GCD represents the greatest common divisor of the first-axis frequency and the second-axis frequency of the driving signal or the restored signal,

represents the first axis frequency of the driving signal or the restoration signal,

denotes the second-axis frequency of the driving signal or the restoration signal.

According to an embodiment, a predetermined phase adjustment unit for the controller 110 to adjust the phase of the restored signal may be obtained based on the first axis frequency and the second axis frequency of the restored signal. In other words, the controller 110 may obtain a predetermined phase adjustment unit for adjusting the phase of the restored signal based on the first axis frequency and the second axis frequency of the restored signal.

According to another embodiment, the predetermined phase adjustment unit for the controller 110 to adjust the phase of the restored signal may be obtained based on the first axis disjoint frequency and the second axis disproportionate frequency of the restored signal. In other words, the control unit 110 may obtain a predetermined phase adjustment unit for adjusting the phase of the restored signal based on the first axis disjoint frequency and the second axis disjoint frequency of the restored signal.

1.3.3. BPSA

Hereinafter, the control unit 110 adjusts the phase of the restored signal using the BPSA method will be described.

Here, BPSA is an abbreviation of Boundary Phase Search Algorithm, and may refer to a method in which the controller 110 obtains a detailed phase correction value of a reconstructed signal using only some pixel information. In particular, pixel information near the boundary of an image This may refer to a method in which the controller 110 obtains a detailed phase correction value of the restored signal by using the optical information corresponding to .

In this case, the vicinity of the boundary of the image means an area as many as a predetermined number of pixels from the ends of the image in which pixel information is obtained to the top, bottom, left, and right of the image acquired by the controller 110 toward the inside of the image. can In other words, the vicinity of the boundary of the image may mean an edge in the entire pixel area of the acquired image. Here, the predetermined number of pixels is an arbitrarily set value and may be changed in consideration of the amount of computation of the controller 110 .

That is, when the controller 110 uses the BPSA method, since the minimum value of the optical information can be calculated by using the coordinate information or optical information obtained for some pixel information instead of the entire pixel information, the controller 110 controls the restoration signal. The time required for correcting the phase may be reduced. In other words, when the control unit 110 uses the BPSA method, the amount of calculation of the control unit 110 may be reduced. That is, the speed at which the controller 110 corrects the phase of the restored signal may be increased.

Here, the acquisition of coordinate information in the pixel information may mean that the position on all pixels indicated by the coordinate information is included in the position indicated by the specific pixel information, and similarly, obtaining the optical information is a coordinate corresponding to the optical information. It may mean that the position on all pixels indicated by the information is included in the position indicated by the specific pixel information. Hereinafter, for convenience of description, it is expressed that the position indicated by the coordinate information or the position indicated by the coordinate information corresponding to the light information is included in the position indicated by the pixel information as the obtained coordinate information or the light information.

33 is a diagram illustrating a density of light information acquired for each pixel information in an entire pixel range, according to an exemplary embodiment.

Referring to FIG. 33 , the bar graphs on the horizontal axis and the vertical axis are graphs representing the number of light information or coordinate information acquired for corresponding pixel information or the density of the light information or coordinate information, respectively. Specifically, the bar graphs displayed on the horizontal axis and the vertical axis may indicate the number or density of coordinate information or light information included in pixel information obtained on an entire axis.

Referring to FIG. 33 , pixel information having a darker color in the entire pixel range of an acquired image may be pixel information in which coordinate information or light information is acquired more than pixel information having a bright color. In other words, the density of coordinate information or light information obtained for pixel information having a darker color may be higher than that of pixel information having a lighter color.

Here, referring to FIG. 33 , a darker color may mean that the color becomes darker from white to black.

34 is a diagram illustrating coordinate information or light information acquired in pixel information of a partial region of an acquired image, according to an embodiment.

As a specific example, referring to Fig. 34, Fig. 34 (a) is a diagram showing coordinate information or light information obtained near a central area in which the number or density of coordinate information or light information is small in the entire pixel area, and , Fig. 34(b) is a diagram showing coordinate information or light information obtained near a boundary area in which a large number or density of coordinate information or light information is obtained in the entire pixel area.

Referring to FIG. 34, the number of coordinate information or light information obtained in a specific pixel region may be greater or the density thereof may be higher than that of other pixel regions.

For example, when the driving signal or the restoration signal indicates a Lissajous pattern, coordinate information or light information included in a pixel region including pixel information is acquired in a greater number of cases in the edge region than in the center region in the entire pixel region; The density of the obtained coordinate information or light information may be higher.

Here, for example, the number of coordinate information or light information obtained from the edge pixel region among the total number of coordinate information or total light information obtained may be at least 50% or more.

35 is a schematic diagram illustrating a method of correcting a phase based on coordinate information or light information obtained in a partial pixel area, according to an exemplary embodiment.

Referring to FIG. 35 , in a method of correcting a phase based on coordinate information or light information obtained in a partial pixel area, the controller 110 obtains a difference value between light information obtained in some pixel information among all pixel information The step (S6000) and the step (S6200) of the controller 110 correcting the phase so that the difference value between the optical information is minimized may be included.

Here, the method of correcting the phase based on the coordinate information or the light information obtained in the partial pixel area may be included in the step ( S4200 ) of the controller 110 obtaining the detailed phase correction value.

Referring to FIG. 35 , the step of the controller 110 acquiring a difference value between the optical information acquired for some pixel information among all the pixel information ( S6000 ) is the control unit 110 acquiring all coordinate information acquired and all optical information corresponding to the information. It may include obtaining a difference value by using light information corresponding to some coordinate information among the obtained coordinate information instead of using .

According to an embodiment, the controller 110 may obtain a difference value using coordinate information or light information obtained in the edge pixel region. Here, the edge pixel area may refer to pixel information near the boundary of the image, as described above.

Specifically, the coordinate information obtained in the edge pixel area may refer to coordinate information obtained in the pixel information of at least one layer or more at the edge of the entire acquired pixel area.

Here, the pixel information of one layer may mean information of all pixels positioned in any one direction selected from the first axis and the second axis. For example, when 256 pieces of pixel information exist as the first axis, pixel information of one layer may mean 256 pieces of pixel information.

According to another embodiment, the controller 110 may obtain a difference value by using at least one piece of light information among light information corresponding to coordinate information obtained in the edge pixel region. In other words, when light information corresponding to one pixel information in the edge pixel area exists, the controller 110 may obtain a difference value by using a part of the corresponding light information instead of all of the light information.

In the following related part, the control unit 110 obtaining the difference value by using at least one or more pieces of light information among the light information corresponding to the coordinate information will be described in detail.

Referring to FIG. 35 , the step of correcting the phase so that the difference value between the optical information is minimized by the controller 110 ( S6200 ) includes the controller 110 correcting the phase of the restored signal so that the difference value between the optical information is minimized. It may be the same step as step S4240 or a step included therein.

According to an embodiment, the controller 110 may obtain a difference value between the optical information by using coordinate information or optical information obtained from partial pixel information among all pixel information.

Accordingly, the controller 110 restores the restored signal as in the step (S4240) of correcting the phase of the restored signal so that the difference value between the obtained optical information is minimized, and the previous controller 110 is the difference value between the optical information is minimized. By changing the phase of the signal, it may be determined whether a difference value between the optical information obtained in the pixel information is minimized.

1.3.4. GPSA

Hereinafter, the control unit 110 adjusts the phase of the restored signal using the GPSA method will be described.

Here, GPSA is an abbreviation of Global Phase Search Algorithm, and the control unit 110 obtains a detailed phase correction value of the restored signal by using at least one piece of optical information among optical information corresponding to coordinate information acquired for some pixel information. It can mean how In particular, the used light information may be light information indicating the same or similar position of the corresponding coordinate information.

When the control unit 110 uses the GPSA method, similar to the control unit 110 using the BPSA method, since some of the total optical information obtained for the entire pixel information is used, the amount of calculation of the control unit 110 can be reduced, Accordingly, the speed at which the controller 110 corrects the phase of the restored signal may be increased.

36 is a schematic diagram illustrating intersecting a pattern appearing according to a driving signal or a restoration signal, according to an embodiment.

For a specific example, referring to FIG. 36 , FIG. 36 (a) is a diagram illustrating that a pattern represented by a driving signal or a restoration signal intersects the pattern in an intersecting pixel region, and FIG. 36 (b) is a diagram in the intersecting pixel region. It is a diagram illustrating first intersecting light information and second intersecting light information obtained by coordinate information having the same or similar positions of points where patterns intersect.

According to an embodiment, the difference value between the optical information acquired by the controller 110 may be a difference value between optical information acquired in the same or similar coordinate information as a position where a pattern indicated by a driving signal or a restoration signal intersects. have.

Here, the position where the pattern intersects may mean that the pattern intersects when the same coordinate information is indicated at different points in time can mean

For example, referring to FIGS. 5, 6, and 36 above, the difference value between the light information obtained by the controller 110 may be a difference value between the first intersecting light information and the second intersecting light information.

Here, although the time information obtained by corresponding the first intersecting light information and the second intersecting light information is different, the positions indicated by the coordinate information corresponding to the first intersecting light information and the second intersecting light information may be the same or similar. .

As a specific example, referring to FIGS. 5 and 6 above, i1 obtained in response to t1 may be first intersecting light information, and t2 obtained in correspondence to t2 may be second intersecting light information. Here, coordinate information corresponding to t1 may be x1 and y1, and coordinate information corresponding to t2 may be x2 and y2. In this case, the positions of the coordinate information indicated by x1 and y1 and the positions of the coordinate information indicated by x2 and y2 may be the same or similar to each other. That is, although time information obtained by corresponding to i1 and i2 is different from each other, positions indicated by coordinate information corresponding to i1 and i2 may be the same or similar to each other.

According to an embodiment, the controller 110 may correct the phase of the restored signal using only optical information corresponding to coordinate information of a point where the driving signal or the pattern indicated by the restored signal intersects.

Hereinafter, a method in which the controller 110 corrects the phase of the restored signal using only optical information corresponding to coordinate information of a point where the driving signal or the pattern indicated by the restored signal intersects will be described.

Hereinafter, for convenience of description, the position indicated by the coordinate information may be expressed as the same or similar to the position indicated by the coordinate information. Also, when the control unit 110 acquires the coordinate information, it may mean that the position indicated by the coordinate information is also acquired.

37 is a block diagram illustrating a method for the controller 110 to correct the phase of a restored signal by using optical information obtained from coordinate information of a position where a driving signal or a pattern indicated by the restored signal intersects, according to an embodiment; to be.

Referring to FIG. 37 , in a method for the controller 110 to correct the phase of the restored signal using optical information obtained in coordinate information of a position where the driving signal or the pattern indicated by the restored signal intersects, the controller 110 performs the phase A step of obtaining an offset for the coordinate information where the pattern intersects based on the restored signal before correcting (S7000), the control unit 110 so that the difference between the optical information obtained for each coordinate information in the obtained offset is minimized Obtaining a first phase correction value and a minimum offset ( S7200 ), the controller 110 changes the phase of the restored signal, and a second phase correction value in which the difference in optical information is minimized based on the coordinate information of the minimum offset It may include obtaining (S7400) and the control unit 110 correcting the phase of the restored signal based on the first phase correction value and the second phase correction value (S7600).

Here, in the method for the controller 110 to correct the phase of the restored signal using optical information obtained in coordinate information of a position where the driving signal or the pattern indicated by the restored signal intersects, the previous controller 110 determines the detailed phase correction value. may be included in the step of obtaining ( S4200 ).

[Equation 4]

Equation 4 is an equation representing a restoration signal that can be used to convert time information into coordinate information and a driving signal for determining a pattern for irradiating light to an object, according to an embodiment.

와 제1 주파수를 기초로

가 획득될 수 있다. 보다 구체적으로,

는 구동 신호 또는 복원 신호가 t=0일 때의 제1축 구동 신호 또는 제1축 복원 신호의 위상을 나타낼 수 있다. 또한, 여기서 c는 패턴의 모양이 결정되기 위한 요소일 수 있다.

와 제2 주파수를 기초로

가 획득될 수 있다. 즉, 제1축 구동 신호 또는 제1축 복원 신호의 위상은 제2축 구동 신호 또는 제2축 복원 신호의 위상과 c만큼 차이가 날 수 있다. 또한, 구동 신호 또는 복원 신호에 의해 나타나는 패턴이 시작하는 위치는

및 c에 의해서 결정될 수 있다. 다시 말해, 패턴이 시작하는 위치는 t=0 일 때 수식 4에 기초하여 나타나는 좌표 정보일 수 있다. Equation 4 is an expression showing the initial time of Equation 1, that is, when t=0. here,

and based on the first frequency

can be obtained. More specifically,

may represent the phase of the first axis driving signal or the first axis restoration signal when the driving signal or the restoration signal is t=0. Also, where c may be a factor for determining the shape of the pattern.

and based on the second frequency

can be obtained. That is, the phase of the first axis driving signal or the first axis restoration signal may be different from the phase of the second axis driving signal or the second axis restoration signal by c. In addition, the position where the pattern indicated by the driving signal or the restoration signal starts is

and c. In other words, the position where the pattern starts may be coordinate information that appears based on Equation 4 when t=0.

와

는 제1 축 구동 신호 또는 제1 축 복원 신호의 위상을 의미할 수 있고,

와

는 제2축 구동 신호 또는 제2축 복원 신호의 위상을 의미할 수 있다. 즉,

와

는 각각 제1 주파수와 제2 주파수가 고정되어 있는 경우 실질적으로

및

에 비례하는 구동 신호 또는 복원 신호의 위상을 의미할 수 있다,At this time,

Wow

may mean the phase of the first axis driving signal or the first axis restoration signal,

Wow

may mean the phase of the second-axis driving signal or the second-axis restoration signal. in other words,

Wow

is substantially when the first frequency and the second frequency are fixed, respectively.

and

may mean a phase of a driving signal or a restoration signal proportional to

Referring to FIGS. 37 and 7 , the step (S7000) of the controller 110 obtaining an offset for the coordinate information at which the pattern intersects based on the restored signal before correcting the phase (S7000) is performed by the controller 110 to correct the phase. Based on the previous reconstruction signal, the coordinate information may include the step of obtaining the same or similar time information or coordinate information. Here, the offset may mean a plurality of pieces of coordinate information corresponding to a plurality of intersection points where a pattern indicated by the driving signal or the restoration signal intersects. Alternatively, the offset may mean at least one or more pieces of time information corresponding to at least one intersection point at which a pattern indicated by the driving signal or the restoration signal intersects.

According to an embodiment, when the control unit 110 obtains the offset for the coordinate information where the pattern intersects, there are a plurality of intersection points where the pattern indicated by the driving signal or the restoration signal intersects, and at this time, at the plurality of intersection points It may be to acquire a plurality of corresponding coordinate information.

For example, referring to FIGS. 5 and 6 above, the control unit 110 may obtain optical information i1 to i4 corresponding to time information t1 to t4, respectively. Here, the time information t1 to t4 may correspond to x1 to x4, which is first-axis coordinate information of the driving signal or the restored signal, respectively, and t1 to t4 are y1, which is the second-axis coordinate information of the driving signal or the restored signal, respectively. to y4 may correspond. That is, the optical information i1 to i4 obtained by the controller 110 sequentially includes x1 to x4, which is the first axis coordinate information of the driving signal or the restored signal, and y1 to y4, which is the second axis coordinate information of the driving signal or the restored signal, respectively. can be matched with

Here, for example, the positions indicated by the coordinate information x1 and y1 corresponding to the time information t1 and the positions indicated by the coordinate information x3 and y3 corresponding to the time information t3 may be the same or similar to each other. Similarly, the positions indicated by the coordinate information x2 and y2 corresponding to the time information t2 and the positions indicated by the coordinate information x4 and y4 corresponding to the time information t4 may be the same or similar to each other.

In this case, the offsets obtained by the controller 110 may be (t1, t3) and (t2, t4) based on the time information. Alternatively, the offsets obtained by the controller 110 may be (x1, y1) and (x3, y3) and (x2, y2) and (x4, y4) based on the coordinate information. In other words, when the coordinate information indicated by the at least two pieces of time information is the same as or similar to each other, the offsets obtained by the controller 110 may constitute one offset by the at least two pieces of time information, and a plurality of intersecting patterns It may be a plurality of offsets configured based on time information respectively corresponding to the points. In addition, as for the offsets obtained by the control unit 110 , at least two coordinate information of a point where the pattern intersects may constitute one offset, and at least two pieces of coordinate information for a plurality of points where the pattern intersects are plural. It may be an offset obtained.

Hereinafter, for convenience of description, it will be described that the controller 110 acquires at least one offset as the controller 110 acquires the offset.

Also, according to an embodiment, the controller 110 may obtain an offset based on the restored signal before the phase is corrected. Here, the restored signal before the phase is corrected may mean that there is no phase-related element in the restored signal.

및

가 0인 신호일 수 있다. 다시 말해, 제어부(110)가 오프셋을 획득하는 복원 신호는

및

가 0인 신호일 수 있다.For example, referring to Equations 1 and 4 above, the restored signal for which the control unit 110 obtains the offset is

and

may be a signal equal to 0. In other words, the restored signal for which the control unit 110 obtains the offset is

and

may be a signal equal to 0.

That is, the controller 110 may change the time information and obtain time information corresponding to coordinate information of a point where the pattern indicated by the restored signal intersects or coordinate information of a point where the pattern indicated by the restored signal intersects.

As a result, the controller 110 may obtain an offset based on the restored signal having a phase of zero.

38 is a schematic diagram illustrating intersection points obtained in different patterns according to an embodiment.

Specifically, referring to Equation 1, Equation 4, and FIG. 38, in FIGS. 38 (a) and 38 (b), except for c, which is an element for determining the shape of a pattern, the rest are the same driving signal or restoration signal. It may be the patterns that have appeared. In other words, FIGS. 38(a) and 38(b) may be a pattern in which the first-axis signal and the second-axis signal appear based on signals having the same frequency and amplitude, but the first-axis signal and the second-axis signal When the phases of are different by c, there may be patterns having different values of c.

According to an exemplary embodiment, even if the phase difference between the first axis signal and the second axis signal of the driving signal or the restoration signal representing the pattern is changed, the time interval for reaching the points at which the intersection occurs in the direction in which the pattern progresses is the same can do.

For example, referring to Equation 1, Equation 4, and FIG. 38 above, when the direction in which the pattern proceeds from the first intersection point to the second intersection point in FIG. 38(a) is the coordinate information of the first intersection point The time interval between the time information corresponding to and the time information corresponding to the coordinate information of the second intersection point is the third when the pattern advances from the third intersection point to the fourth intersection point in FIG. The time interval between the time information corresponding to the coordinate information of the intersection point and the time information corresponding to the coordinate information of the fourth intersection point may be the same.

That is, the time information corresponding to the offsets respectively obtained from the driving signal or the restoration signal representing two patterns having different phase differences between the first axis signal and the second axis signal may be different by the same time interval. In other words, even if the phases of the first axis signal and the second axis signal of the driving signal and the restoration signal are different from each other, the time interval between the time information corresponding to the obtained offsets and the time information at which the offsets are obtained is the same can do.

37 and 38 , the step (S7200) of the controller 110 obtaining a first phase correction value and a minimum offset such that the difference between the optical information obtained in each coordinate information from the obtained offset is minimized is the control unit (110) changing the time information corresponding to the obtained offset at various time intervals, obtaining time information in which the difference value of the optical information at the offsets is the minimum, and obtaining the minimum offset corresponding thereto have.

를 변경시켜가며 변경된 오프셋을 획득하는 것을 의미할 수 있다.Here, with reference to Equations 1 and 4 above, the control unit 110 changing the time information of the offset is that of the driving signal or the restoration signal.

It may mean acquiring a changed offset while changing .

를 변경시키는 경우, 변경된 오프셋에 대응하는 좌표 정보의 광 정보의 차이가 최소가 되는

일 수 있다. 이때, 구동 신호 또는 복원 신호의

가 제1 위상 보정 값인 경우, 제어부(110)가 획득하는 오프셋이 최소 오프셋일 수 있다.In addition, referring to Equations 1 and 4 above, the controller 110 controls the first phase correction value to minimize the difference in optical information.

When changing , the difference between the optical information of the coordinate information corresponding to the changed offset is minimized

can be At this time, the driving signal or the restoration signal

When is the first phase correction value, the offset obtained by the controller 110 may be the minimum offset.

를 변경시켜가며 제1 위상 보정 값 및 최소 오프셋을 획득할 수 있다.According to an embodiment, the control unit 110 controls the

The first phase correction value and the minimum offset may be obtained by changing .

를 복수의 값으로 변경시킨 복수의 오프셋들 중 광 정보의 차이가 최소가 되는 제1 위상 보정 값 및 그에 대응되는 최소 오프셋을 획득할 수 있다.According to another embodiment, the control unit 110 of the restored signal

A first phase correction value at which a difference in optical information is minimized and a corresponding minimum offset may be obtained among a plurality of offsets obtained by changing α to a plurality of values.

를 변경시키는 단위 또는 제어부(110)가 획득하는 복수의

사이의 간격은 미리 정해질 수 있다. 즉, 제어부(110)는 미리 정해진 간격으로

를 변경시켜가며 광 정보의 차이가 최소가 되는 제1 위상 보정 값 및 그에 대응하는 최소 오프셋을 획득할 수 있으며, 또한 미리 정해진 간격으로 복수의

를 획득하고, 그에 대응되는 복수의 오프셋들 중 광 정보의 차이가 최소인

를 제1 위상 보정 값으로 획득하고, 제1 위상 보정 값에 대응하는 최소 오프셋을 획득할 수 있다.At this time, in the previous embodiments, the control unit 110

A unit or a plurality of units obtained by the control unit 110 to change

The interval between them may be predetermined. That is, the control unit 110 at a predetermined interval

It is possible to obtain a first phase correction value at which the difference in optical information is minimized and a corresponding minimum offset by changing

is obtained, and the difference in optical information among a plurality of offsets corresponding thereto is

may be obtained as the first phase correction value, and a minimum offset corresponding to the first phase correction value may be obtained.

사이의 간격은 연속적으로 변경되는

사이의 차이를 의미할 수 있다. 예를 들어, 복수의

에 포함되는

,

및

가 연속적인 경우, 복수의

사이의 간격은

과

의 차이를 의미할 수 있다.Here, a plurality of the controller 110 obtains

The interval between is continuously changed

It could mean the difference between For example, multiple

included in

,

and

If is continuous, plural

the spacing between

class

may mean the difference between

Here, the plurality of offsets may be obtained by the controller 110 in the form of a lookup table (LUT). That is, when outputting a plurality of offsets, the controller 110 may output time information or coordinate information corresponding to the plurality of offsets at once.

를 변경시키는 단위 또는 제어부(110)가 획득하는 복수의

사이의 미리 정해진 간격은 딥일 수 있다. 다만, 이에 제한되지 않고, 제어부(110)가

를 변경시키는 단위 또는 제어부(110)가 획득하는 복수의

사이의 미리 정해진 간격은 제어부(110)가 위상을 변경시킬 수 있는 최소 단위일 수 있다. 여기서 제어부(110)가 위상을 변경시킬 수 있는 최소 단위는 구동 신호 또는 복원 신호에 기초하여 획득되는 좌표 정보가 실질적으로 변경되기 위한 단위일 수 있다.Here, for example, the control unit 110

A unit or a plurality of units obtained by the control unit 110 to change

The predetermined interval between may be dips. However, it is not limited thereto, and the control unit 110

A unit or a plurality of units obtained by the control unit 110 to change

The predetermined interval therebetween may be a minimum unit in which the controller 110 can change the phase. Here, the minimum unit in which the controller 110 can change the phase may be a unit in which coordinate information obtained based on the driving signal or the restoration signal is substantially changed.

Referring to FIG. 37, the control unit 110 changes the phase of the restored signal, and based on the coordinate information of the minimum offset, obtaining a second phase correction value at which the difference in optical information is minimized (S7400) is performed by the control unit ( 110) changing the phase difference between the first axis signal and the second axis signal of the restored signal and obtaining a phase difference in which the difference in optical information in the coordinate information corresponding to the obtained minimum offset is minimized can

Here, referring to Equations 1 and 4 above, the phase difference between the first axis signal and the second axis signal of the restored signal may be c.

In this case, referring to FIG. 38 , when the phase difference between the first axis signal and the second axis signal of the restored signal is different, the shape of the pattern displayed according to the restored signal may also be different. Accordingly, the difference in the optical information in the coordinate information corresponding to the obtained minimum offset may also vary according to the change in the phase difference between the first-axis signal and the second-axis signal of the reconstructed signal.

In other words, when the control unit 110 changes the phase difference between the first axis signal and the second axis signal of the restored signal, time information corresponding to the minimum offset and optical information in coordinate information obtained based on the restored signal It is possible to obtain a phase difference value in which the difference between . That is, the second phase correction value may mean a phase difference value at which the difference between the time information corresponding to the minimum offset and the optical information in the coordinate information obtained based on the reconstructed signal is the minimum. Also, the second phase correction value may mean c at which the difference between the time information corresponding to the minimum offset and the optical information in the coordinate information obtained based on the corresponding restored signal is the minimum.

According to an embodiment, the controller 110 may acquire the second phase correction value while changing c of the restored signal.

According to another embodiment, the control unit 110 determines the difference between the optical information based on the restored signals obtained by changing the c of the restored signal to a plurality of values and the plurality of coordinate information obtained based on time information corresponding to the minimum offset. The minimum second phase correction value may be obtained.

In this case, in the above embodiments, a unit for changing c by the controller 110 or an interval between a plurality of cs changed by the controller 110 may be predetermined.

Here, for example, a predetermined interval of a plurality of c or a unit for changing c may be the aforementioned dip. Here, the predetermined intervals of a plurality of c may mean a difference between continuously changed c's. For example, when c1, c2, and c3 included in a plurality of cs are continuous, an interval between the plurality of cs may mean a difference between c1 and c2.

Alternatively, as another example, a predetermined interval of a plurality of c or a unit for changing c may be based on the number of images acquired by the controller 110 in one second. Specifically, the number of images acquired by the controller 110 for 1 second may be a sampling rate, and a predetermined interval of a plurality of c or a unit for changing c may be an inverse of the sampling rate.

Alternatively, for another example, a predetermined interval of a plurality of c or a unit for changing c may be a minimum unit in which the controller 110 can change a phase. Here, the minimum unit in which the controller 110 can change the phase may be a unit in which coordinate information obtained based on a driving signal or a restoration signal is substantially changed.

Here, a plurality of pieces of coordinate information obtained based on the time information corresponding to the minimum offset and the restored signals in which the controller 110 changes the c of the restored signal to a plurality of values, and optical information corresponding to the plurality of coordinate information The data may be obtained by the control unit 110 in the form of a lookup table. That is, when the controller 110 outputs a plurality of coordinate information obtained on the basis of the restored signals obtained by changing the c of the restored signal to a plurality of values and time information corresponding to the minimum offset, the controller ( 110) may output the coordinate information corresponding to the plurality of coordinate information obtained based on the restored signals obtained by changing the c of the restored signal to a plurality of values and the time information corresponding to the minimum offset at a time.

Referring to FIG. 37 , the step of the controller 110 correcting the phase of the restored signal based on the first phase correction value and the second phase correction value ( S7600 ) is performed by the controller 110 with the first axis signal of the restored signal and the second phase correction value. It may include setting the phase of the second axis signal to the first phase correction value and the second phase correction value.

또는

를 제1 위상 보정 값으로 설정할 수 있고, 제2축 신호의 위상인

또는

를 제1 위상 보정 값과 제2 위상 보정 값의 합으로 설정할 수 있다. Specifically, referring to Equations 1 and 4 above, the control unit 110 controls the phase of the first axis signal.

or

can be set as the first phase correction value, and the phase of the second axis signal

or

may be set as the sum of the first phase correction value and the second phase correction value.

Here, when the controller 110 corrects the phase of the restored signal, it may mean that the controller 110 sets the phase of the restored signal to a specific phase.

1.3.5. SRSA

Hereinafter, the control unit 110 adjusts the phase of the restored signal using the SRSA method will be described.

Here, SRSA is an abbreviation of Sequential Region Phase Search Algorithm. As the phase of the reconstructed signal approaches the final phase correction value, the difference value of the optical information obtained from at least one or more pixel information tends to decrease. may mean a method of obtaining a detailed phase correction value of the restored signal.

Here, the final phase correction value may be the phase of the delayed reconstructed signal. Alternatively, the final phase correction value may be the phase of the restored signal obtained by the controller 110 through the detailed phase correction method.

Also, here, the tendency may mean that as the phase of the reconstructed signal approaches the final phase correction value, there is a slope in which a difference value of optical information obtained from at least one or more pixel information becomes smaller in proportion to a change in phase. Alternatively, the tendency may mean convexity having a slope in which a difference value of optical information obtained from at least one or more pixel information becomes smaller in proportion to a change in phase as the phase of the reconstructed signal approaches the final phase correction value. . That is, as the phase of the reconstructed signal approaches the final phase correction value, a difference value of optical information obtained from at least one or more pixel information may exhibit convexity in a region around the final phase correction value.

39 is a graph illustrating a difference value between optical information obtained from at least one or more pieces of pixel information that appears as a phase of a reconstructed signal changes, according to an exemplary embodiment.

Here, the x-axis of FIG. 39 represents the phase of the first-axis signal or the second-axis signal of the reconstructed signal, and the y-axis represents the difference value of the optical information obtained from the pixel information, in particular, the dispersion between the optical information. . In this case, the negative sign of the phase of the 1-axis signal or the phase of the second-axis signal of the restored signal means that the last value of the range in the phase range in which the first-axis signal or the second-axis signal is repeated is used as a reference value can do.

Specifically, referring to FIG. 39, FIG. 39 (a) is a diagram illustrating a difference value between optical information obtained for each pixel information obtained in the entire phase range of the first axis signal or the second axis signal of the restored signal, FIG. 39(b) shows a difference value between optical information obtained for each pixel information obtained in a partial phase region of the first axis signal or the second axis signal of the restored signal, which is within the first tendency range of FIG. 39(a). the drawing shown.

Here, the difference value of the light information obtained for each pixel information may be, for example, the sum of the difference values of the light information obtained for each pixel information. However, the present invention is not limited thereto, and a difference value between light information obtained for each pixel information may be the aforementioned difference value.

Here, the entire phase range may mean that the phase range of the reconstructed signal is 0 to 2π in the radian range. Here, the range in radians may be changed to a range according to time. The change of the radian range to the range according to time may be changed according to the frequency of the first axis signal or the frequency of the second axis signal of the reconstructed signal.

According to an exemplary embodiment, a difference value between optical information obtained from respective pieces of pixel information according to the phase of the first axis signal or the second axis signal of the restored signal may indicate a tendency according to a phase change.

For example, referring to FIG. 39 , in a range other than the first tendency range among the entire phase range of the reconstructed signal, the difference value between the optical information obtained for each pixel information may not indicate a tendency according to the phase change. have.

However, within the first trend range among the entire phase range of the reconstructed signal, a difference value between optical information acquired for each pixel information with a specific phase may exhibit a tendency according to a change in phase.

According to an embodiment, the controller 110 may acquire the phase of the restored signal belonging to the first tendency range by using the initial phase correction method.

That is, the initial phase correction value of the restored signal obtained by the controller 110 using the initial phase correction method may be a phase within the first tendency range.

40 is a diagram illustrating a difference value between optical information obtained from at least one or more pixel information according to the phase of the restored signal when the controller 110 changes the phase of the restored signal to a phase indicating a specific FF, according to an embodiment; It is a graph.

Here, the x-axis of FIG. 40 represents the phase of the first-axis signal or the second-axis signal of the reconstructed signal, and the y-axis represents the difference value of the optical information obtained from the pixel information, in particular, the dispersion between the optical information. .

Referring to FIG. 40 , when the controller 110 obtains a difference value between optical information obtained for each pixel information only with a phase indicating a specific FF for the phase of the restored signal, the difference value according to the phase of the restored signal is a peak. It does not show a peak, and it can show a certain tendency according to the change of the phase.

Here, the peak of the difference value according to the phase of the restored signal may appear as the FF according to the phase of the restored signal changes.

In this case, when the difference value according to the phase of the restored signal indicates a peak, the controller 110 may obtain the detailed phase correction value of the restored signal as a value other than the final phase correction value. Here, when the control unit 110 obtains the detailed phase correction value of the restored signal as a different phase correction value, it may mean that the difference value between the optical information obtained for each pixel information is a local minimum. have. Also, the controller 110 acquiring the detailed phase correction value of the restored signal may mean that the difference value between the optical information acquired for each pixel information is a global minimum.

According to an embodiment, referring to FIG. 40 , when the difference value between the optical information obtained for each pixel information has a constant tendency, the controller 110 may perform phase correction of the restored signal based on the tendency. have.

Hereinafter, when a difference value between optical information obtained for each pixel information has a constant tendency, a method for the controller 110 to perform phase correction of the restored signal based on the tendency will be described.

41 is a block diagram illustrating a method for the controller 110 to obtain a final phase correction value of a reconstructed signal using a tendency, according to an embodiment.

Referring to FIG. 41, the method for the controller 110 to obtain the final phase correction value of the restored signal using the tendency is that the controller 110 acquires the phase of the restored signal having the largest FF near the initial phase correction value. Step S8000, the control unit 110 obtaining an intermediate phase correction value in which the difference value between the optical information obtained in at least one or more pixel information is the minimum based on the tendency from the phase of the restored signal having the greatest FF ( S8200) and the control unit 110, based on the tendency from the intermediate phase correction value, obtaining a final phase correction value in which the difference value between the optical information obtained for at least one or more pixel information is minimized (S8400) may be included. .

Here, the method for the controller 110 to obtain the final phase correction value of the restored signal by using the tendency may be included in the step ( S4200 ) of the controller 110 obtaining the detailed phase correction value.

Referring to FIG. 41, in the step of the controller 110 acquiring the phase of the restored signal having the largest FF near the initial phase correction value (S8000), the controller 110 selects the initial phase correction value that is a phase within the first tendency range. based on the detailed phase correction.

Here, the vicinity of the initial phase correction value may mean setting a range based on the dip centered on the initial phase correction value. Specifically, in the controller 110 , having a phase range equal to half of the dip centered on the initial phase correction value may mean the vicinity of the initial phase correction value.

Also, here, obtaining the phase of the reconstructed signal having the largest FF may mean that the density of pixel information from which optical information is obtained is high.

Referring to FIG. 41 , the step of obtaining, by the control unit 110, an intermediate phase correction value in which a difference value between optical information obtained from at least one or more pixel information is minimized based on a tendency from the phase of the restored signal having the greatest FF ( S8200 ) may include obtaining, by the controller 110 , an intermediate phase correction value based on a minimum value search method based on a tendency.

Here, the minimum value search method based on the tendency may be a slope-based search algorithm including the Nelder-Mead method, Momentum method, Adagrad method, Adam method, Steepest gradient method, or Gradient descent method. have.

For example, in the minimum phase value search method based on the tendency, the control unit 110 changes the phase of the restored signal by the dip, and at least one using coordinate information obtained based on the restored signal corresponding to the phase changed by the dip. This may mean using a difference value between the acquired light information for the above pixel information.

Alternatively, in the minimum value search method based on the tendency, the controller 110 changes the phase of the restored signal by an integer multiple of the dip, and uses coordinate information obtained based on the restored signal corresponding to the phase changed by an integer multiple of the dip. It may mean using a difference value between light information obtained for one or more pixel information. Here, the integer multiple of the dip, which is the changed unit, may be a different integer multiple each time the phase of the reconstructed signal is changed.

Alternatively, the minimum value search method based on the tendency is obtained based on the restored signal corresponding to the phase changed by the predetermined phase correction unit while the controller 110 changes the phase of the restored signal in a predetermined phase correction unit rather than a dip. It may mean using a difference value between light information obtained for at least one piece of pixel information using coordinate information.

In this case, the controller 110 may obtain an intermediate phase correction value that minimizes the difference between the acquired pixel information and the acquired optical information by using the phase of the restored signal that is changed based on the tendency.

42 is a graph illustrating a difference value between optical information obtained from at least one or more pieces of pixel information that appears as a phase of a restored signal is changed in a partial phase region of the restored signal, according to an embodiment.

Here, the x-axis of FIG. 42 represents the phase of the first-axis signal or the second-axis signal of the reconstructed signal, and the y-axis represents the difference value of the optical information obtained from the pixel information, in particular, the dispersion between the optical information. .

In this case, referring to FIG. 42 , a change in the difference value between the optical information acquired for each pixel information according to the phase change of the reconstructed signal may have a tendency even in the second tendency range.

Also, referring to FIG. 42 , the range of the x-axis region of FIG. 42 may be a dip.

41 and 42 , the step of obtaining, by the control unit 110, a final phase correction value in which a difference value between optical information obtained for at least one or more pixel information is minimized based on a tendency from the intermediate phase correction value ( S8400 may include obtaining, by the controller 110 , a final phase correction value based on a tendency in a second tendency range, which is a partial phase range of the obtained reconstructed signal.

Here, the intermediate phase correction value obtained by the controller 110 may be within the second tendency range.

According to an embodiment, even within the second tendency range, the controller 110 may obtain the final phase correction value based on the tendency.

In this case, the controller 110 may obtain a final phase correction value in which a difference value between the acquired optical information and the acquired pixel information is minimized based on the changed phase of the reconstructed signal.

Here, the controller 110 may set the unit for changing the phase within the second tendency range to a predetermined unit smaller than the dip.

Accordingly, the control unit 110 changes in a predetermined unit smaller than the dip in order to search for the minimum value based on the tendency, and the final phase correction value at which the difference value between the light information obtained in at least one or more pixel information becomes the minimum. can be obtained

Alternatively, the controller 110 may set the unit for changing the phase within the second tendency range as an integer multiple of a predetermined unit smaller than the dip.

Accordingly, the control unit 110 changes to an integer multiple of a predetermined unit smaller than the dip in order to search for the minimum value based on the tendency, and the final phase correction in which the difference value between the optical information obtained from at least one or more pixel information is minimized value can be obtained.

43 is a block diagram illustrating a method for the controller 110 to obtain a final phase correction value of a reconstructed signal using a slope-based minimum value search technique, according to an embodiment.

Here, the method for the controller 110 to obtain the final phase correction value of the restored signal using the slope-based minimum value search technique may be included in the step ( S4200 ) of the controller 110 obtaining the detailed phase correction value.

Referring to FIG. 43 , in the method for the controller 110 to obtain the final phase correction value of the restored signal using the gradient-based minimum value search technique, the controller 110 performs the first phase correction using the first gradient-based search technique. In the step of searching for a value ( S9000 ), when the controller 110 corrects the restored signal with the first phase correction value, the difference value of the optical information obtained from at least one or more pixel information is compared with a predetermined difference value, or the first Comparing the change value of the phase unit changed in the gradient-based search method with a predetermined phase change value (S9200), the control unit 110 searching for a second phase correction value using the second gradient-based search method (S9200) S9400) and when the controller 110 corrects the reconstructed signal with the second phase correction value, a difference value of optical information obtained from at least one or more pixel information is compared with a predetermined difference value or changed in a second gradient-based search technique and comparing the change value in phase units with a predetermined phase change value ( S9600 ).

Referring to FIG. 43 , in the step of the controller 110 searching for the first phase correction value using the first gradient-based search technique ( S9000 ), in order for the controller to obtain the phase correction value of the restored signal, the first gradient-based search method is performed. It may include using a search technique.

Here, the first gradient-based search technique may refer to the trend-based search method or the gradient-based minimum value search algorithm described above.

In this case, the first gradient-based search technique changes the phase of the restored signal differently each time it is searched and searches for the phase value of the restored signal in which the difference value of the optical information obtained from at least one or more pixel information is the minimum. have.

In addition, the first phase correction value may be obtained as a result of the first gradient-based search method, but the controller may obtain the first phase correction value based on the result of the first gradient-based search method.

Specifically, the phase correction value of the restored signal obtained by the result of the first slope-based search technique may be the first intermediate phase correction value, wherein the first phase correction value is the maximum FF in the phase adjacent to the first intermediate phase correction value. may be a phase value representing

Referring to FIG. 43 , when the controller 110 corrects the reconstructed signal with the first phase correction value, a difference value of optical information obtained from at least one or more pixel information is compared with a predetermined difference value, or a first gradient-based search is performed. Comparing the change value of the phase unit changed in the technique with the predetermined phase change value (S9200) is such that the controller 110 additionally corrects the first phase correction value based on the predetermined difference value or the predetermined phase change value. may include doing

Specifically, when the controller corrects the reconstructed signal based on the first phase correction value obtained in the previous step, when the difference value of the optical information obtained for at least one or more pixel information is greater than the predetermined difference value, the controller Searching for the first phase correction value using the first slope-based search technique based on the first phase correction value obtained in step S9000 may be performed again. The first phase correction value obtained here may be different from the previously obtained first phase correction value.

Similarly, when the controller corrects the restored signal based on the first phase correction value obtained in the previous step, the change value of the phase changed to obtain the first phase correction value in the first slope-based search technique is a predetermined phase If it is greater than the change value, the controller may again perform the step of searching for the first phase correction value ( S9000 ) using the first slope-based search technique based on the first phase correction value obtained in the previous step.

In addition, when the controller corrects the restored signal based on the first phase correction value obtained in the previous step, when the difference value of the optical information obtained for at least one or more pixel information is smaller than the predetermined difference value, the controller performs the previous step Searching for a second phase correction value using a second slope-based search technique based on the first phase correction value obtained in step S9400 may be performed.

Similarly, when the controller corrects the restored signal based on the first phase correction value obtained in the previous step, the change value of the phase changed to obtain the first phase correction value in the first slope-based search technique is a predetermined phase If the change value is smaller than the change value, the controller may perform an operation S9400 of searching for a second phase correction value using a second slope-based search technique based on the first phase correction value obtained in the previous step ( S9400 ).

Here, the predetermined phase change value or the predetermined difference value may be a value arbitrarily set by the user in consideration of the amount of computation of the controller.

Referring to FIG. 43 , in the step of the controller 110 searching for the second phase correction value using the second gradient-based search technique ( S9400 ), in order for the controller to obtain the phase correction value of the reconstructed signal, the second gradient-based It may include using a search technique.

Here, the second gradient-based search method may use the same method as the previous first gradient-based search method, but the first gradient-based search method and the second gradient-based search method calculate a minimum value based on different phase change values. can explore.

As a specific example, the first gradient-based search method and the second gradient-based search method may search for a minimum value while changing the phase of the reconstructed signal to be an integer multiple of a specific phase change value. However, the present invention is not limited thereto, and the first gradient-based search method and the second gradient-based search method are a constant multiple of a specific phase change value, where the multiple may mean a multiple of a number including integers, rational numbers, and irrational numbers. Based on -, the minimum value can be searched for.

Referring to FIG. 43 , when the controller 110 corrects the reconstructed signal with the second phase correction value, the difference value of optical information obtained from at least one or more pixel information is compared with a predetermined difference value, or a second gradient-based search is performed. Comparing the change value of the phase unit changed in the technique with the predetermined phase change value (S9600) is such that the controller 110 additionally corrects the second phase correction value based on the predetermined difference value or the predetermined phase change value. may include doing

Specifically, when the controller 110 corrects the reconstructed signal with the second phase correction value, the difference value of the optical information obtained from at least one or more pixel information is compared with a predetermined difference value or changed in the second gradient-based search technique. In the step of comparing the change value in phase units to a predetermined phase change value ( S9600 ), the difference in optical information obtained from at least one or more pixel information when the controller 110 corrects the restored signal with the first phase correction value It may be similar to the step of comparing the value with a predetermined difference value or comparing the phase-unit change value changed in the first gradient-based search method with a predetermined phase change value ( S9200 ).

That is, when the controller corrects the reconstructed signal based on the second phase correction value obtained in the previous step, when the difference value of the optical information obtained for at least one or more pixel information is greater than the predetermined difference value, the controller performs the previous step Searching for a second phase correction value using a second slope-based search technique based on the second phase correction value obtained in step S9400 may be performed again. The second phase correction value obtained here may be different from the previously obtained second phase correction value.

Similarly, when the controller corrects the restored signal based on the second phase correction value obtained in the previous step, the change value of the phase changed to obtain the second phase correction value in the second slope-based search technique is a predetermined phase If it is greater than the change value, the controller may again perform the step of searching for the second phase correction value ( S9400 ) by using the second slope-based search technique based on the second phase correction value obtained in the previous step.

In addition, when the controller corrects the restored signal based on the second phase correction value obtained in the previous step, when the difference value of the optical information obtained for at least one or more pixel information is smaller than the predetermined difference value, the controller performs the previous step The second phase correction value obtained in ? may be set as the final phase correction value of the restored signal.

Similarly, when the controller corrects the restored signal based on the second phase correction value obtained in the previous step, the change value of the phase changed to obtain the second phase correction value in the second slope-based search technique is a predetermined phase When it is smaller than the change value, the controller may set the second phase correction value obtained in the previous step as the final phase correction value of the restored signal.

Similarly, the predetermined phase change value or the predetermined difference value may be a value arbitrarily set by the user in consideration of the amount of computation of the controller, and when the controller 110 corrects the restored signal with the second phase correction value, at least one or more pixel information A predetermined difference value in the step (S9600) of comparing the difference value of the optical information obtained in . Alternatively, the predetermined phase change value may be obtained by comparing a difference value of optical information obtained from at least one or more pixel information with a predetermined difference value when the controller 110 corrects the restored signal with a first phase correction value, or a first slope It may be different from the predetermined difference value or the predetermined phase change value in the step ( S9200 ) of comparing the change value of the phase unit to be changed in the base search technique with the predetermined phase change value.

According to an embodiment, the methods in which the controller 110 searches for a phase correction value for correcting the phase of the restored signal may be mixed and used.

Also, according to an embodiment, the controller may simultaneously correct the phases of the first-axis signal and the second-axis signal of the restored signal. Here, when the control unit corrects the phase at the same time, it may mean that the control unit corrects the phase of the first axis signal and the phase of the second axis signal of the restored signal using the method of the above-described embodiments.

Also, according to an embodiment, the controller may sequentially correct the phases of the first axis signal and the second axis signal of the restored signal. In other words, the control unit corrects the phase of the second axis signal after correcting the phase of the first axis signal of the restored signal, or corrects the phase of the first axis signal after correcting the phase of the second axis signal of the restored signal. can Here, when the control unit corrects the phase at the same time, it may mean that the control unit corrects the phase of the first axis signal and the phase of the second axis signal of the restored signal using the method of the above-described embodiments.

As described above, although the embodiments have been described with reference to the limited embodiments and drawings, various modifications and variations are possible from the above description by those skilled in the art. For example, the described techniques are performed in an order different from the described method, and/or the described components of the system, structure, apparatus, circuit, etc. are combined or combined in a different form than the described method, or other components Or substituted or substituted by equivalents may achieve an appropriate result.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Image generating device 100 Control unit 110
Light generator 120 Driver 130
Receiver 140 Display 160
Fiber 310

Claims (8)

An image generating apparatus for acquiring an image of an object, comprising:
a control unit for generating the first signal and the second signal;
a light irradiator for irradiating light to the object using the first signal and the second signal; and
and a light receiving unit for obtaining a light receiving signal based on the light returning from the object
The control unit generates an image of the object based on the first signal, the second signal, and the light-receiving signal,
The control unit selects a first mode and a second mode for acquiring an image of the object,
When the selected mode is the first mode, the control unit adjusts a frequency component of the first signal to a first frequency and adjusts a frequency component of the second signal to a second frequency,
When the selected mode is the second mode, the control unit adjusts the frequency component of the first signal to a third frequency and adjusts the frequency component of the second signal to a fourth frequency,
At least one of the difference between the first frequency and the third frequency that is the frequency of the first signal or the difference between the second frequency and the fourth frequency that is the frequency of the second signal is different by a predetermined frequency or more,
image generating device.
The method according to claim 1,
A mode selection unit from which the first mode or the second mode can be selected; further comprising,
image generating device.
The method according to claim 1,
The first mode is a high-speed scan mode, and the second mode is a high-definition scan mode,
image generating device.
4. The method according to claim 3,
The high-speed scan mode acquires one image based on a period in which a first scanning pattern that appears based on a first signal adjusted to the first frequency and a second signal adjusted to the second frequency is repeated,
The high-definition scan mode acquires at least one image before a period in which a second scanning pattern appearing based on the first signal adjusted to the third frequency and the second signal adjusted to the fourth frequency is repeated,
image generating device.
The method according to claim 1,
When the frequency component of the first signal changes from the first frequency to the third frequency by more than the predetermined frequency or when the frequency component of the second signal changes from the second frequency to the fourth frequency by the predetermined frequency or more,
A scanning pattern appearing based on the changed first signal and the changed second signal is different from a scanning pattern appearing based on the first signal and the second signal before being changed to the predetermined frequency;
image generating device.
6. The method of claim 5,
The scanning pattern is a pattern obtained when the first signal is applied to a first axis and the second signal is applied to a second axis perpendicular to the first axis,
image generating device.
A control unit for generating a first signal and a second signal, a light irradiator for irradiating light to an object using the first signal and the second signal, and a light receiving unit for obtaining a light receiving signal based on the light returning from the object An image acquisition method of an image generating device comprising:
generating, by the controller, an image of the object based on the first signal, the second signal, and the light reception signal;
selecting a first mode and a second mode for acquiring an image for
when the selected mode is the first mode, adjusting a frequency component of the first signal to a first frequency and adjusting a frequency component of the second signal to a second frequency; and
when the selected mode is the second mode, adjusting a frequency component of the first signal to a third frequency and adjusting a frequency component of the second signal to a fourth frequency;
At least one of the difference between the first frequency and the third frequency that is the frequency of the first signal or the difference between the second frequency and the fourth frequency that is the frequency of the second signal is different by a predetermined frequency or more,
How to acquire images.
A computer-readable recording medium in which a program for executing the method of claim 8 is recorded.

Images