KR20200004949A - Illumination system and control method of the illumination system - Google Patents

Abstract

Disclosed are an illumination system and a control method thereof, which can generate a projection light of various shapes to acquire various image data. Here, the illumination system comprises an illumination device and a control device. The illumination device comprises: an illumination unit which includes a plurality of light sources which can individually control lighting in order to project light to an object to be measured; a filming unit which receives the light projected by the illumination unit and reflected by the object to be measured, and generates an image of the object to be measured; and a control unit which can individually control the light sources. In addition, the control device provides pattern information including at least one illumination pattern determining the illuminated light source among the light sources to the control unit, and controls the control unit such that the illumination unit may be illuminated corresponding to the pattern information. Therefore, a user can generate a desired illumination pattern by using the control device to transmit the same to the illumination device, such that the illumination device may be controlled corresponding to the illumination pattern desired by the user to acquire various image data.

Description

Lighting system and its control method {ILLUMINATION SYSTEM AND CONTROL METHOD OF THE ILLUMINATION SYSTEM}

The present invention relates to a lighting system and a control method thereof, and more particularly, to a lighting system and a control method thereof that can be measured by photographing the surface of the measurement object after irradiating light.

In general, the illumination system irradiates the illumination from the upper part of the measurement object disposed on the stage, acquires the reflected light reflected by the measurement object and analyzes the image to measure the shape of the measurement object or to measure the material of the measurement object. Say a device to recognize. That is, the illumination system irradiates light to a measuring object to generate an image of the measuring object, and to control the lighting device and analyze the image of the measuring object to measure the shape and material of the measuring object. It may be provided with a control device for performing the recognition.

The conventional measurement system may directly perform the necessary image analysis by directly photographing the shape of the measurement object, or may perform the required image analysis using the pattern image obtained by irradiating pattern illumination on the measurement object.

As described above, image analysis performed by directly photographing the shape of the measurement object may be generally used to perform an inspection operation using a batch shape of the measurement object through a two-dimensional image of the measurement object. In addition, image analysis performed by using a pattern image obtained by irradiating pattern light on a measurement object may be generally used to perform an inspection operation using three-dimensional shape information of the measurement object.

In general, the conventional lighting system may be provided separately from the illumination system for shooting two-dimensional image and the illumination system for shooting three-dimensional image. Alternatively, a single illumination system for capturing a 3D image may indirectly acquire not only the 3D image but also the 2D image. However, this method has a disadvantage in that it takes time and is difficult to obtain an accurate image, compared to a method of directly photographing a 2D image.

On the other hand, the illumination system may apply a deflectometry technique to determine the state of the surface of the measurement object, that is, the inclination of the surface of the measurement object, the shape of the surface, the surface scratch. For example, the illumination system can apply the deflectometry technique by irradiating a sine wave pattern. Therefore, the lighting system needs to include a light source that can adjust brightness or color for each pixel in order to express a sine wave pattern, and may use a display device such as an LCD monitor.

However, the display device utilized in the lighting system has a planar shape and thus may be difficult to completely and properly cover the top of the lighting system. Accordingly, it is impossible to secure optical data corresponding to the portion not covered by the display device, or the accuracy of the optical data corresponding to the portion not properly covered may be degraded. Furthermore, the measurement range of the measurement object may be limited, it may not be possible to secure the illumination to be irradiated at a low angle, and if the accuracy is low even if the illumination is secured, dark field reflected light may be properly obtained. It is pointed out that the problem is that it is difficult to grasp the surface state, and the light amount is weak and a long exposure time is required for imaging.

In addition, in order to solve the above problems and to expand the user's convenience, it may be necessary to study the automatic control method of the lighting system.

Accordingly, an object of the present invention is to provide a lighting system capable of obtaining various image data by generating various types of irradiation light.

In addition, another object of the present invention is to provide a control method of a lighting system for controlling the lighting system.

A lighting system according to an exemplary embodiment of the present invention includes a lighting device and a control device. The illumination device includes a lighting unit for irradiating light to a measurement object, including a plurality of light sources individually controlled to light up, and receiving light reflected from the measurement object to generate an image of the measurement object. And a controller capable of individually controlling the light sources. The control device provides pattern information including at least one lighting pattern for determining a light source to be turned on among the light sources, and controls the control unit to light the lighting unit according to the pattern information.

The control device may transmit parameter information including mode information for determining one trigger mode among a plurality of trigger modes for operating the lighting device to the controller. In this case, the lighting device may be driven in the trigger mode determined from the mode information.

The parameter information may further include timing information for determining timing of a control signal for controlling the lighting device.

The trigger modes are S / W trigger mode for starting the driving of the lighting device by the lighting trigger signal generated in the control device, and H for starting the driving of the lighting device by the lighting trigger signal generated in the external control device. / W may include a trigger mode.

The S / W trigger mode may include a first trigger mode in which the controller controls driving of the lighting unit in response to the lighting trigger signal received from the control device when the control device transmits an illumination trigger signal to the controller. Can be. In this case, when the controller is driven in the first trigger mode, the control device may transmit a photographing trigger signal to the photographing unit to control driving of the photographing unit.

In the first trigger mode, when the control device transmits an illumination trigger signal to the control unit, the control unit responds to the illumination trigger signal received from the control device, one by one of the plurality of lighting patterns included in the pattern information. The lighting unit may be controlled to be turned on while delaying the lighting delay time included in the timing information. In this case, when the controller is driven in the first trigger mode, the control apparatus may transmit driving of a plurality of photographing trigger signals corresponding to lighting patterns included in the pattern information to the photographing unit one by one to control the driving of the photographing unit. Can be.

The transmission timing of each of the photographing trigger signals may be after a timing at which lighting control of the lighting unit is completed by each of lighting patterns included in the pattern information.

In the S / W trigger mode, when the controller transmits an illumination trigger signal to the controller, the controller controls driving of the illumination unit in response to the illumination trigger signal received from the controller, and captures a photographing trigger signal. It may include a second trigger mode for transmitting to the negative to control the driving of the photographing unit.

In the second trigger mode, when the control device transmits an illumination trigger signal to the control unit, the control unit responds to the illumination trigger signal received from the control device, one by one of the plurality of lighting patterns included in the pattern information. The lighting unit is controlled to turn on the lighting unit while delaying the lighting delay time included in the timing information, and the driving of the photographing unit is controlled by transmitting a plurality of photographing trigger signals corresponding to the lighting patterns included in the pattern information to the photographing unit one by one. can do.

The transmission time of each of the photographing trigger signals may be a point of time delayed by a photographing delay time included in the timing information after the lighting control of the lighting unit is started by each of the lighting patterns included in the pattern information.

In the H / W trigger mode, when the external control device transmits an illumination trigger signal to the control unit, the control unit controls the driving of the illumination unit in response to the illumination trigger signal received from the external control device, and generates a shooting trigger signal. It may include a third trigger mode for transmitting to the photographing unit to control the driving of the photographing unit.

In the third trigger mode, when the control unit receives an illumination trigger signal from the external control device, the controller transmits an imaging trigger signal to the photographing unit while controlling the driving of the lighting unit by delaying the trigger delay time included in the timing information. The driving of the photographing unit may be controlled.

Specifically, in the third trigger mode, when the external control device transmits an illumination trigger signal to the control unit, the control unit may include a plurality of patterns included in the pattern information in response to the illumination trigger signal received from the external control device. The lighting unit is controlled to turn on the lighting unit while delaying the lighting delay time included in the timing information by one of lighting patterns, and transmits a plurality of shooting trigger signals corresponding to the lighting patterns included in the pattern information to the photographing unit one by one. The driving of the photographing unit can be controlled.

The transmission time of each of the photographing trigger signals may be a point of time delayed by a photographing delay time included in the timing information after the lighting control of the lighting unit is started by each of the lighting patterns included in the pattern information.

In the H / W trigger mode, when the external control device transmits an illumination trigger signal to the control unit, the control unit controls initial driving in the lighting unit in response to an illumination trigger signal received from the external control device, and captures a trigger. And transmitting a signal to the photographing unit to control driving of the photographing unit, and controlling a driving after the initial driving in the lighting unit in response to a photographing completion signal provided from the photographing unit.

In the fourth trigger mode, when the controller receives an illumination trigger signal from the external control device, the controller delays the trigger delay time included in the timing information to control initial driving of the illumination unit, and transmits a photographing trigger signal to the photographing unit. The control unit may control driving of the photographing unit and control driving after the initial driving in the lighting unit in response to a photographing completion signal provided from the photographing unit.

Specifically, in the fourth trigger mode, when the external control device transmits an illumination trigger signal to the control unit, the control unit may include a plurality of patterns included in the pattern information in response to the illumination trigger signal received from the external control device. After controlling the lighting of the lighting unit with the first lighting pattern among the lighting patterns, the first trigger signal is transmitted to the capturing unit to control the first driving of the capturing unit, and then the first photographing completion signal is received from the capturing unit, Thereafter, the controller controls the pattern information in response to an N-th photographing completion signal including the first photographing completion signal until the lighting control of the lighting unit is completed for all of the plurality of lighting patterns included in the pattern information. If the lighting unit is controlled to turn on the N + 1th lighting pattern among the plurality of lighting patterns included After controlling the N + 1 th driving of the photographing unit by transmitting an N + 1 th trigger signal to the photographing unit, the N + 1 th photographing completion signal may be received from the photographing unit (where N is an integer greater than or equal to 1). ).

The point in time at which the N + 1th photographing completion signal is transmitted from the photographing unit to the controller may be after a point in which the Nth driving of the photographing unit is completed.

Subsequently, the control method of the lighting system according to the exemplary embodiment of the present invention includes the step of the control device transmitting the pattern information to the lighting device, and the lighting device is turned on according to the pattern information. At this time, the illumination device includes a lighting unit for irradiating light to the measurement object, including a plurality of light sources that can be individually controlled lighting, and receives the light reflected from the measurement object to receive the image of the measurement object And a controller capable of individually controlling the light sources to be turned on according to the pattern information. The pattern information may include at least one lighting pattern for determining a light source among the light sources.

The control method of the lighting system may further include transmitting, by the control apparatus, parameter information including mode information for determining one of a plurality of trigger modes for operating the lighting apparatus to the controller. have. In this case, the lighting device may be driven in the trigger mode determined from the mode information.

As described above, according to the lighting system and the control method thereof, the user is irradiated with incident light from a plurality of directions to a measurement object using a plurality of light sources, and the light sources are controlled to be turned on according to a preset lighting pattern. According to the type of irradiation light desired by the user, the illumination light of various patterns can be generated only by the illumination system without having an independent lighting device. Accordingly, various images for performing necessary tasks such as shape inspection can be obtained. Accordingly, image analysis can be performed.

In addition, in forming the illumination pattern, since a spatial shape pattern, a temporal change pattern, a spatial change pattern, and the like can be formed, a ring pattern, a grid pattern, a check pattern, a grid transfer pattern, a sine wave pattern, and a section can be formed. Irradiation lights of a wide variety of patterns, such as lighting patterns, can be easily obtained without modifying part of the lighting system or installing additional lighting devices.

For example, the dark field image of the object to be measured, the bright field image, the tilt image using deflectometry, the point light source such as pin illumination, and the dome illumination Images under a variety of lighting forms, such as images, shadow extraction images, can be obtained through a single illumination system. In addition, in order to obtain both the two-dimensional image and the three-dimensional shape information of the measurement object, two lights may be obtained without having both the illumination for the two-dimensional image acquisition and the illumination for the three-dimensional shape information acquisition.

In addition, as the user generates a desired lighting pattern using the control device and transmits the desired lighting pattern to the lighting device, the lighting device may be controlled according to the lighting pattern desired by the user to acquire various image data about the measurement object.

In addition, as the user generates the desired parameter information using the control device and transmits it to the lighting device, the lighting device may be controlled according to the parameter information desired by the user. For example, when the user selects any one trigger mode through the control device and transmits the trigger mode to the lighting device, the lighting device may be driven in the trigger mode selected by the user.

1 is a conceptual diagram illustrating a lighting device of a lighting system according to an embodiment of the present invention.
FIG. 2 is a conceptual diagram for describing an operation of the lighting system of FIG. 1.
3 is a plan view of the lighting cover of the lighting system of FIG.
4 is a conceptual diagram illustrating an embodiment of an illumination pattern in the illumination system of FIG. 1.
5 to 8 are conceptual views illustrating another embodiment of an illumination pattern in the illumination system of FIG. 1.
9 to 12 are conceptual views illustrating another embodiment of an illumination pattern in the illumination system of FIG. 1.
FIG. 13 is a conceptual diagram illustrating a control relationship in the lighting system of FIG. 1.
14 is a flowchart illustrating a control method of the lighting system of FIG. 1.
FIG. 15 is a screen illustrating an example of generating an illumination pattern during an uploading process of the control method of FIG. 14.
FIG. 16 is a screen illustrating an example of generating a group pattern during an uploading process of the control method of FIG. 14.
FIG. 17 is a screen illustrating an example of generating parameter information during an uploading process of the control method of FIG. 14.
18 is a conceptual diagram illustrating an uploading process in the control method of FIG. 14.
FIG. 19 is a conceptual diagram illustrating that a triggering process of the control method of FIG. 14 is driven in a first triggering mode.
20 and 21 are waveform diagrams illustrating timing of the first triggering mode of FIG. 19.
FIG. 22 is a screen illustrating an example of a pattern image generated through a triggering process in the control method of FIG. 14.
FIG. 23 is a conceptual diagram illustrating that a triggering process of the control method of FIG. 14 is driven in a second triggering mode.
24 is a waveform diagram illustrating timing of the second triggering mode of FIG. 23.
FIG. 25 is a conceptual diagram illustrating that a triggering process of the control method of FIG. 14 is driven in a third triggering mode.
FIG. 26 is a waveform diagram illustrating timing of the third triggering mode of FIG. 25.
FIG. 27 is a conceptual diagram illustrating that a triggering process of the control method of FIG. 14 is driven in a fourth triggering mode.
FIG. 28 is a waveform diagram illustrating timing of the fourth triggering mode of FIG. 27.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described in the specification, and that one or more other features It should be understood that it does not exclude in advance the possibility of the presence or addition of numbers, steps, actions, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art.

Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a conceptual diagram illustrating a lighting apparatus of a lighting system according to an embodiment of the present invention, Figure 2 is a conceptual diagram for explaining the operation of the lighting system of FIG.

1 and 2, an illumination system according to an exemplary embodiment of the present invention includes an illumination device 100 capable of generating an image of the measurement object MT by irradiating light onto the measurement object MT, and The controller 200 may control the lighting device 100 and analyze the image of the measurement object MT to perform shape measurement and material recognition of the measurement object MT.

First, the lighting device 100 may include a measurement stage 110, an illumination unit 120, a photographing unit 130, and a controller 140.

The measurement stage 110 supports and positions the measurement object MT. The measurement stage 110 may be in an open state upward. In FIG. 1, the measurement stage 110 is fixed, but the position and attitude of the measurement object MT may be controlled by the controller 140 or other control device.

The lighting unit 120 may include a plurality of light sources LS that may irradiate incident light IL with respect to the measurement object MT. For example, the light sources LS may each include a light emitting diode LED. Alternatively, the light sources LS may include other types of light emitting units.

In the present embodiment, the light sources LS are connected to each other in series or serially parallel mixing, and may be individually controlled to be lit, and are disposed to surround the upper portion of the measurement object MT. The incident light IL from a plurality of directions with respect to MT may be selectively irradiated toward the measurement object MT.

The incident direction of the incident light IL may be represented by an incident angle θ that is inclined with respect to a normal direction with respect to the measurement object MT. For example, the incident light IL may be incident in all directions upwards, and the incident light IL may indicate an incident direction at an incident angle θ between an inclination angle of 0 ° to 90 °.

In one embodiment, the lighting unit 120 may further include a lighting cover (CV). The lighting cover CV may be disposed on the measurement object MT to cover the periphery of the measurement object MT. In this case, the light sources LS, for example, light emitting diodes may be disposed on an inner surface of the lighting cover CV.

For example, the light emitting diodes may include at least one of red, green, and blue light emitting diodes, or may be white light emitting diodes. In addition, the light emitting diodes may be light-emitting diodes of different colors alternately arranged on the inner surface of the lighting cover (CV), the light-emitting diodes that change their color may be arranged. In addition, the light emitting diodes may have a fixed brightness or a variable brightness.

3 is a plan view of the lighting cover of the lighting system of FIG.

Referring to FIG. 3, in one embodiment, the light emitting diodes may be formed in a strip type physically and electrically connected to each other. That is, the strip type light emitting diodes may be connected to each other in a strip, as shown in FIG. 3. Meanwhile, the number of light emitting diodes shown in FIG. 3 is set as an example, and may be more or less than this. The same applies to the case of FIGS. 4 to 12 described later.

For example, the lighting cover CV may have a shape including at least a portion of a dome, and the strip type light emitting diodes include a shape including at least a portion of the dome, as shown in FIG. 3. It may be formed of a plurality of rows (R1, R2, ..., Rn-1, Rn) in the. That is, the strip type light emitting diodes may be disposed along a plurality of rings having different diameters.

The light emitting diodes arranged as above may be connected in series. However, in this case, when controlling the lighting of the light emitting diodes, some delay may occur and thus may not be controlled as desired. Therefore, the light emitting diodes may be grouped into a predetermined number of groups.

For example, the connection state of the light emitting diodes may be adjusted according to the number and / or arrangement of the light emitting diodes. That is, the light emitting diodes may be grouped into a plurality of channels based on a predetermined number, may be grouped into a plurality of channels based on the arranged columns, and a plurality of light emitting diodes are considered in consideration of both the number and the arranged columns May be grouped into channels.

In addition, the light emitting diodes forming each ring may be connected to each other in the same row. However, since the number of light emitting diodes is small in the case of a row close to the opening OP (for example, R1), which will be described later, different columns (for example, R1 and R1) may be used for the columns close to the opening OP. By connecting the light emitting diodes of R2), they may be grouped in the same or similar number for each channel. On the other hand, a plurality of groups may be arranged so as not to be connected to each other even in a column far away from the opening OP or in the same row if necessary. On the other hand, the control unit 140 may control the lighting independently by dividing the light emitting diodes divided into a plurality of channels for each channel.

Meanwhile, in order to dissipate heat generated from the light emitting diodes, the lighting cover CV may be formed of a metallic material, for example, aluminum. In addition, by bonding between the connection line between the light emitting diodes and the lighting cover (CV) by using a heat transfer bond or a thermal bond (thermal bond), the light emitting diodes are firmly installed on the lighting cover (CV) while simultaneously radiating heat You can make this possible.

In an embodiment, the lighting cover CV may have an opening OP formed corresponding to an upper portion of the measurement object MT. The opening OP may be used as a passage opened to receive the reflected light RL by the photographing unit 130 to be described later. In addition, the opening OP may be used as a passage for irradiating incident light toward the measurement object MT in an additional illumination (second lighting unit) to be described later.

In an embodiment, the lighting unit 120 may include a first lighting unit 122 and a second lighting unit 124. The first lighting unit 122 may include the light emitting diodes mounted on the lighting cover CV, and may provide incident light IL1 to the measurement object MT. The second lighting unit 124 may provide incident light IL2 to the measurement object MT through the opening OP formed in the lighting cover CV.

As shown in FIG. 1, both the first lighting unit 122 and the second lighting unit 124 provide light generated from the light sources LS described above to the measurement object MT, and the first lighting unit 122 may be mounted on the lighting cover CV, and the second lighting unit 124 may be mounted on a separate plate PL, for example.

In one embodiment, the lighting device 100 may further include a beam splitter 150. For example, as shown in FIGS. 1 and 2, the second lighting unit 124 may be disposed above the opening OP, and the photographing unit 130 is one side of the opening OP. Can be placed in. In this case, the beam splitter 150 transmits the incident light IL2 generated by the second lighting unit 124 to the measurement object MT, and reflects the reflected light RLs by the measurement object MT. The light may be reflected to the photographing unit 130. Accordingly, the reflected light reflected in the same optical axis direction as the optical axis of the second lighting unit 124 may be effectively received by the photographing unit 130.

On the other hand, unlike the arrangement shown in Figures 1 and 2, the second lighting unit 124 may be disposed on one side of the opening (OP), the photographing unit 130 is the upper portion of the opening (OP) It may be arranged in.

Since the incident light IL2 provided from the second illumination unit 124 passes through the beam splitter 150, the amount of light is lost compared to the incident light IL1 provided from the first illumination unit 122. This can happen. In addition, since the light sources of the second illumination unit 124 are located farther from the measurement object MT than the light sources of the first illumination unit 122, the amount of light reaching the measurement object MT is the second illumination unit. 124 may be less than the first lighting unit 122. Therefore, the arrangement density of the light sources of the second illumination unit 124 may be greater than the arrangement density of the light sources of the first illumination unit, thereby compensating for the amount of light lost.

In one embodiment, the lighting unit 120 may include a diffuser (DF). The diffuser DF may be disposed in front of the light sources LS and may diffuse light generated by the light sources LS. In addition, the diffuser DF may have a shape corresponding to the illumination cover CV. Therefore, the opening OPD may be formed in the diffuser DF in the same manner as the opening OP of the lighting cover CV. The diffuser DF may be disposed in front of the light sources LS of the first lighting unit 122 and in front of the light sources LS of the second lighting unit 124.

The photographing unit 130 may acquire the reflected light RLs by the measurement object MT according to the incident light emitted by the illumination unit 120. As described above, the photographing unit 130 may be arranged to receive the reflected light RL reflected from the measurement object MT through the opening OP, and through the beam splitter 150. The reflected light RL can be received.

The photographing unit 130 may be installed to adjust the light receiving angle in order to interpret various signal patterns according to a desired method. In addition, the photographing unit 130 considers the installation error of the beam splitter 150, the processing error of the opening OPD formed in the diffuser DF, and the diversity of the size or resolution of the photographing unit 130 itself. In addition, it may have an installation tolerance.

In one embodiment, the photographing unit 130 may include an optical sensor capable of measuring the intensity of the reflected light RL reflected by the incident light (MT), CCD or CMOS It may also include a camera such as a camera. In addition, the photographing unit 130 may further include a lens disposed in front of the optical sensor or the camera.

The controller 140 may control the light sources LS in a serial communication method, a parallel communication method, or a communication method in which serial and parallel are mixed, and control the light sources LS to be turned on according to a preset lighting pattern. Can be.

As described above, the light sources LS may include a plurality of channels connected in series with each other. In this case, the controller 140 may control the lighting of the light sources LS for each channel connected in series with each other. That is, as the light sources LS are formed in series with a connection structure for data transmission, the controller 140 may individually control the light sources LS by a serial communication method.

The light sources LS may be divided into a plurality of sections for partial or area control by a parallel communication method. However, in order to implement various types of free lighting, a plurality of wires may be necessary because the size of the sections is set to be smaller and then connected to the controller 140 as many as the number of sections. In addition, in order to adjust the brightness of each of the sections is required to control quickly with a relatively high current, the structure of the lighting device and its control device can be complicated and the manufacturing cost can be increased, and the control in terms of section control Because of its low degree of freedom, it can be difficult to implement various types of lighting.

However, in the case of following the serial communication method such as the lighting unit 120, the light source LS may be individually controlled by having a connection structure formed in series for data transmission, thereby freely implementing a form of lighting. In order to implement such a serial communication scheme, the control unit 140 may include a circuit that enables serial communication such as a latch, and a pulse width modulation (pulse) modulating the brightness of the light sources LS. width modulation (PWM), DA converter, and the like.

On the other hand, as described above, when connecting a plurality of light sources (LS) in series, it may be necessary to collectively control the lighting, brightness, etc. of each light source (LS), and thus may cause some time delay, The controller 140 may control the light sources LS in a communication method in which serial and parallel are mixed. That is, the light sources LS may be grouped into a predetermined number of channels that may be controlled in a serial communication manner, and as the channels are controlled in a parallel communication manner, the light sources LS may be controlled in a serial communication manner only. A time delay that occurs when can be avoided.

Since the lighting unit 120 has a structure capable of irradiating light in almost all directions with respect to the measurement object MT, the control unit 140 is configured such that the light sources LS are turned on according to various lighting patterns. The light sources LS may be controlled.

In the present embodiment, the illumination pattern may be a pattern (hereinafter, referred to as a “spatial shape pattern”) in which a combination of incident lights by light sources that are turned on according to a spatial position is irradiated to have a specific shape. For example, the specific shape of the spatial shape pattern may be simply a one-dimensional point shape, a linear shape, or a two-dimensional surface shape.

In example embodiments, the spatial shape pattern may include a ring pattern. In this case, light sources positioned in a direction corresponding to a specific incident angle with respect to the measurement object MT are turned on, and the remaining light sources are not turned on. A ring pattern of incident angle can be formed. The ring pattern may have a one-dimensional ring shape or a two-dimensional ring shape composed of a plurality of adjacent rows.

From the ring pattern images according to various incidence angles and combinations thereof obtained by adjusting the incidence angle of the ring pattern, the reflection brightness distribution may be obtained and accordingly, the inclination of the surface of the measurement object MT may be obtained. The degree of glare can be quantified. In addition, by forming the incidence angle of the ring pattern relatively low (ie, increasing θ in FIG. 2), when the measurement object MT is a flat object, diffuse reflection light excluding mirror reflection light may be obtained.

In another embodiment, the spatial shape pattern may include a grid pattern, a check pattern, and the like. The grid pattern or the check pattern detects the distortion of the pattern in the photographed image of the reflected light reflected from the surface of the measurement object MT, and from this, the state of bending, distortion, etc. of the surface of the measurement object MT may be determined. have.

In the present embodiment, the illumination pattern may be a pattern (hereinafter, referred to as a “temporal change pattern”) in which the spatial shape pattern changes over time. For example, the temporal change pattern may include a lattice transfer pattern that sequentially moves by a predetermined interval in time. At this time, by turning on the light sources so as to form a grid pattern of a predetermined pitch and sequentially changing the spatial shape patterns that do not light the remaining light sources, a grid-transfer pattern that is phase-transition can be formed. In addition, the grating transfer pattern may be formed in the form of a sine wave pattern.

In the present embodiment, the illumination pattern may be a pattern (hereinafter, referred to as a “spatial change pattern”) in which the spatial shape pattern changes according to a spatial position. For example, the spatial change pattern may include a section illumination pattern having the same shape as the lighting light sources, but changing the shape according to the spatial position. At this time, the section illumination irradiated from all directions by moving the lighting position in all directions by using a spatial shape pattern that turns on the light sources and does not light the remaining light sources so as to form illumination of a surface light source having a predetermined shape as one section. You may form a pattern.

As such, the controller 140 may control the lighting of the light sources LS according to an illumination pattern including a spatial shape pattern, a temporal change pattern, and a spatial change pattern. In detail, the illumination pattern may include various patterns such as a ring pattern, a grid pattern, a check pattern, a grid transfer pattern, a sine wave pattern, a section lighting pattern, and all of the various lighting patterns are controlled by the controller 140. By the lighting unit 120 may be applied.

The controller 140 may apply the color of the light sources LS to the spatial shape pattern, the temporal change pattern, and the spatial change pattern (hereinafter, referred to as a “color pattern”). The light sources LS to be turned on. That is, the controller 140 may control the lighting of the light sources LS according to the color pattern. By the lighting control according to the color pattern, it is possible to grasp the color of the measurement object (MT), can be obtained by dividing the diffuse reflection color, glitter color, etc., and also the color according to the surface slope of the measurement object (MT) Can be obtained.

4 is a conceptual diagram illustrating an embodiment of an illumination pattern in the illumination system of FIG. 1. The small circles shown in FIG. 4 represent the light sources LS of the first lighting unit 122, and the large circles surrounding the small circles represent the boundary OL of the lighting cover CV of the first lighting unit 122. Can be. The inside of the small circles may be black to turn on the light source (ON), and the inside of white circles may be off to the light source (OFF).

As shown in FIG. 4, the illumination pattern may be a ring pattern irradiated at various angles. The ring pattern may be used when irradiating light onto the measurement object MT at a specific irradiation angle, thereby directly photographing a two-dimensional image of the measurement object MT at a specific irradiation angle. In this case, the user uses the illumination pattern as the spatial shape pattern. On the other hand, according to the needs of the user, the irradiation angle can be changed, in this case, the ring pattern corresponding to the irradiation angle to be changed can be turned on.

5 to 8 are conceptual views illustrating another embodiment of an illumination pattern in the illumination system of FIG. 1. The small circles, the large circles, the black ones and the white ones shown in FIGS. 5 to 8 are the same as those of FIG. 4.

5 to 8, the illumination pattern may be a sinusoidal pattern that changes with time. The sine wave pattern may be used when irradiating light of a sine wave pattern to the measurement object MT, and thus may be used when analyzing a three-dimensional shape of the measurement object MT. In this case, the user uses the illumination pattern as the temporal change pattern.

In this case, the wavelength of the sine wave pattern may have a relatively large value such that almost one wavelength is formed inside the dome shape as shown in FIGS. 5 to 8. In this case, since the 2π ambiguity is hardly affected, the measurement range is widened. Alternatively, the wavelength of the sinusoidal pattern may have a relatively small value in the dome shaped measurement portion. In this case, there is an advantage that the precision is increased. Therefore, even when the sine wave pattern is used, since the wavelength can be freely selected and changed, it is possible to easily select and adjust the priority among the measurement range and the precision that are in a trade-off relationship with each other.

5 to 8, all of the small circles are shown to be the same as turning on the light source (ON), but in order to implement the sine wave pattern more effectively, the turned on light source LS is turned on. They may have a lower brightness when located outside, and may have a higher brightness when located outside.

In addition, although the lighting display is abbreviate | omitted in the part corresponding to the said opening OP (FIG. 3) in FIGS. 5-8, the 2nd lighting part 124 corresponding to the opening OP (refer FIG. 1). Can be turned on. For example, in FIG. 6, the central part corresponding to the opening OP may be turned on.

9 to 12 are conceptual views illustrating another embodiment of an illumination pattern in the illumination system of FIG. 1. The small circles, the large circles, the black ones and the white ones shown in FIGS. 9 to 12 are the same as those of FIG. 4.

9 to 12, the illumination pattern may be an illumination section pattern for each direction in which a lighting position is changed. The direction-specific illumination section pattern may be used when irradiating light having a specific area to the measurement object MT in various directions, thereby detecting edges of the measurement object MT or the measurement object ( It can be used to remove the highlight of MT). In this case, the user uses the illumination pattern as the spatial change pattern.

In this case, the direction-specific illumination section pattern may be formed such that the illumination section of a specific region moves in four directions as shown in FIGS. 9 to 12. In this case, since the four sides of the measurement object MT are examined, the edges or highlights of the measurement object MT may be detected by using the four images photographed or the images edited or combined therewith. . For example, an edge of the measurement object MT (eg, an object having a protruding contour such as a coin) may be detected by selecting and combining pixels of maximum brightness in the images, and the images may be detected. By selecting and combining the pixels of the minimum brightness in the image, highlights of the measurement object MT (eg, vinyl), that is, sparking disturbance of the vinyl may be removed.

As such, since irradiation light having various lighting patterns may be generated by the control of the controller 140, only the illumination system 100 may obtain desired irradiation light. In addition, various images may be obtained by the irradiation light obtained as described above, and thus various image analyzes may be easily performed. For example, in order to obtain both the 2D image and the 3D shape information of the measurement object MT, it is not necessary to include both the illumination for obtaining the 2D image and the illumination for acquiring the 3D shape information. Two lights can be obtained and used for image analysis.

Referring back to FIG. 1, the lighting system 100 may further include a housing 160 accommodating at least the lighting unit 120, the photographing unit 130, the beam splitter 150, and the like. The housing 160 may independently include housings that individually or partially combine the first lighting unit 122, the second lighting unit 124, the photographing unit 130, the beam separation unit 150, or the like. It may be provided, or may optionally accommodate the measurement stage 110, the control unit 140 and the like.

The control device 200 may control the lighting device 100 to obtain an image of the measurement object MT from the lighting device 100, and analyze the image of the measurement object MT to measure the measurement. Shape measurement and material recognition of the object MT may be performed. For example, the control device 200 may control the driving of the lighting unit 120 by controlling the controller 140, and control the photographing unit 130 to be photographed by the photographing unit 130. An image of the measurement object MT may be provided. In addition, although the control device 200 may directly control the driving of the photographing unit 130, the control device 200 may indirectly control the driving of the photographing unit 130 through the control unit 140. In the present embodiment, the control device 200 may be, for example, a computer system.

According to the illumination system as described above, by irradiating incident light from a plurality of directions to the object to be measured using a plurality of light sources, and by controlling the light sources to be turned on according to a predetermined illumination pattern, the type of irradiation light desired by the user Accordingly, the illumination light of various patterns can be generated only by the illumination system without having an independent lighting device. Accordingly, various images for performing necessary tasks such as shape inspection can be obtained, thereby performing image analysis accordingly. Can be.

In addition, in forming the illumination pattern, since a spatial shape pattern, a temporal change pattern, a spatial change pattern, and the like can be formed, a ring pattern, a grid pattern, a check pattern, a grid transfer pattern, a sine wave pattern, and a section can be formed. Irradiation lights of a wide variety of patterns, such as lighting patterns, can be easily obtained without modifying part of the lighting system or installing additional lighting devices.

For example, the dark field image of the object to be measured, the bright field image, the tilt image using deflectometry, the point light source such as pin illumination, and the dome illumination Images under a variety of lighting forms, such as images, shadow extraction images, can be obtained through a single illumination system. In addition, in order to obtain both the two-dimensional image and the three-dimensional shape information of the measurement object, two lights may be obtained without having both the illumination for the two-dimensional image acquisition and the illumination for the three-dimensional shape information acquisition.

Hereinafter, the control of the lighting system described above will be described in detail.

FIG. 13 is a conceptual diagram illustrating a control relationship in the lighting system of FIG. 1.

Referring to FIG. 13, a plurality of light sources included in the lighting unit 120 may be grouped into a plurality of channels, for example, eight channels. The channels may be electrically connected to channel output terminals ch0, ch1, ..., ch7 of the controller 140, respectively. Accordingly, the controller 140 may control the channels by a parallel communication method, and control light sources included in each of the channels by a serial communication method. On the other hand, the control unit 140 may include a central processing unit and a memory.

The controller 140 may be electrically connected to the control device 200 to transmit and receive signals, and accordingly, the control device 200 may control the controller 140. Alternatively, the controller 140 may be electrically connected to the external control device 300 through an input terminal Tin to receive a signal, and thus the external control device 300 may control the controller 140. Can be controlled. The external control device 300 may be a computer system in the same manner as the control device 200, but may be a programmable logic controller (PLC) capable of controlling a plurality of devices.

The photographing unit 130 may be electrically connected to the control device 200 to transmit and receive signals, and thus the control device 200 controls the photographing unit 130 or from the photographing unit 130. The photographed image may be provided. In addition, the photographing unit 130 may be electrically connected to the output terminal Tout of the controller 140, and may be controlled by the control device 200, or through the output terminal or other input terminals. Any signal may be transmitted to the controller 140. Meanwhile, the control device 200 may be directly provided with the image generated by the photographing unit 130 from the photographing unit 130, but is first transmitted to the controller 140, and then the controller 140 receives the image. You may be provided.

Hereinafter, a method of controlling the lighting system using the control relationship of the lighting system illustrated in FIG. 13 will be described in detail.

FIG. 14 is a flowchart illustrating a control method of the lighting system of FIG. 1, and FIG. 15 is a screen illustrating an example of generating an illumination pattern during an uploading process among the control methods of FIG. 14, and FIG. 16 is a flowchart of the control method of FIG. 14. FIG. 17 is a screen illustrating an example of generating a group pattern during an uploading process, and FIG. 17 is a screen illustrating an example of generating parameter information during an uploading process among the control method of FIG. 14, and FIG. 18 is an uploading process of the control method of FIG. 14. Is a conceptual diagram showing.

14 to 18, first, the control device 200 may upload pattern information and parameter information to the lighting device 100 (S100).

Specifically, for example, the control device 200 may generate the pattern information including the information on the illumination pattern. In this case, the pattern information may include information on at least one lighting pattern. For example, the user may generate a single lighting pattern by selecting a light source to be turned on through the screen as shown in FIG. 15, and generate a plurality of lighting patterns by continuously selecting the light source in this manner.

In the present embodiment, the pattern information may include information on one lighting pattern or may include information on a plurality of lighting patterns. The pattern information may include information on at least one group pattern including at least one lighting pattern. For example, the pattern information may include information about a plurality of group patterns, each of which includes at least one lighting pattern.

In addition, the control device 200 may generate the parameter information including various control information for controlling the lighting unit 120. For example, the parameter information may include timing information for determining various delay times, mode information for determining a triggering mode, network information for determining a network of each component, and configuration information for determining other control elements. have.

In the present embodiment, the timing information may include information on an illumination delay time, an imaging delay time, and a trigger delay time. The illumination delay time may mean a time interval from when the lighting unit 120 is controlled by a plurality of lighting patterns until the control of one lighting pattern is completed and the control of another lighting pattern starts. The photographing delay time may mean a time interval between the start of the control of the lighting unit 120 by one lighting pattern and the start of the control of the photographing unit 130 for capturing the lighting pattern. The trigger delay time may mean a time interval until the control unit 140 starts to control the lighting unit 120 by the first lighting pattern after receiving the lighting trigger signal from the external control device 300. have. In FIG. 17, the illumination delay time is indicated as 'On-Time Delay', the shooting delay time is indicated as 'Out Trigger Delay', and the trigger delay time is indicated as 'PLC IN-Trigger Delay'. have.

In the present embodiment, the mode information may include mode selection information that determines one of the plurality of trigger modes. In this case, the trigger modes are the S / W trigger mode for starting the driving of the lighting device 100 by the lighting trigger signal generated by the control device 200 and the lighting trigger generated by the external control device 300. It may include a H / W trigger mode for starting the driving of the lighting device 100 by a signal.

The S / W trigger mode may include a first trigger mode and a second trigger mode. The first trigger mode may mean a mode in which the control device 200 controls both the controller 140 and the photographing unit 130. The second trigger mode may refer to a mode in which the control device 200 controls the controller 140 and the photographing unit 130 controls the controller 140.

The H / W trigger mode may include a third trigger mode and a fourth trigger mode. The third trigger mode may refer to a mode in which the external control device 300 controls the controller 140 and the controller 140 controls the photographing unit 130. In the fourth trigger mode, the external control device 300 controls the controller 140, the controller 140 controls the photographing unit 130, and the photographing unit 130 again controls the controller 140. It may mean a mode for controlling.

As such, when the control device 200 generates the pattern information and the parameter information, the control device 200 uploads the pattern information and the parameter information to the control unit 140 to perform the control of the control unit 140. Can be stored in memory. In this case, the uploading of the pattern information and the parameter information may be performed independently of each other or simultaneously.

Meanwhile, the lighting unit 120 may investigate all patterns included in the pattern information stored in the memory of the controller 140, but may also examine only some selected patterns of the stored pattern information. For example, after the control apparatus 200 uploads the pattern information to the controller 140, a selection pattern that determines a pattern to be actually applied by the lighting unit 120 from the pattern information stored in the memory of the controller 140. The information may be uploaded to the controller 140 and stored in the memory of the controller 140, and then the lighting unit 120 may examine a pattern included in the selection pattern information.

Subsequently, the lighting device 100 may be triggered and driven using the pattern information and the parameter information. For example, the lighting device 100 may be driven in any one of the first trigger mode, the second trigger mode, the third trigger mode, and the fourth trigger mode.

FIG. 19 is a conceptual diagram illustrating that a triggering process of the control method of FIG. 14 is driven in a first triggering mode. FIGS. 20 and 21 are waveforms illustrating timings of a first triggering mode of FIG. 19. 14 is a screen illustrating an example of a pattern image generated through a triggering process of the control method of FIG. 14.

19 to 22, when the control mode of the lighting apparatus 100 is determined as the first trigger mode based on the mode information of the parameter information, the lighting apparatus 100 is driven in the first trigger mode. Can be. In this case, the first trigger mode may be divided into a case in which one lighting pattern is included in the selection pattern information as shown in FIG. 20 and a case in which a plurality of lighting patterns are included in the selection pattern information as shown in FIG. 21. .

First, when the control pattern 200 transmits an illumination trigger signal to the control unit 140 when the selection pattern information includes one lighting pattern, the control unit 140 transmits from the control device 200. In response to the received lighting trigger signal, the lighting unit 120 may be controlled to be turned on by one lighting pattern included in the selection pattern information. Subsequently, after the lighting control by the lighting pattern is completed in the lighting unit 120, the controller 140 controls the lighting unit 120 to remain in an ON state, and then transmits an end signal from the control apparatus 200. When received, the lighting unit 120 may be turned off.

Meanwhile, when the control device 200 transmits a shooting trigger signal to the photographing unit 130, the photographing unit 130 performs photographing for a predetermined time in response to the photographing trigger signal received from the control device 200. Can be done. In this case, the transmission time of the photographing trigger signal may be after a time point at which the lighting control by the lighting pattern is completed in the lighting unit 120. Thereafter, the image photographed by the photographing unit 130 may be transmitted to the control device 200 and stored and displayed on the display device.

Subsequently, when the selection pattern information includes a plurality of lighting patterns, when the control device 200 transmits an illumination trigger signal to the control unit 140, the control unit 140 transmits from the control device 200. In response to the received lighting trigger signal, the lighting unit 120 may be controlled to be turned on with the first lighting pattern which is the first among the plurality of lighting patterns included in the selection pattern information. Then, after the lighting control by the lighting pattern is completed in the lighting unit 120, the control unit 140 delays the lighting delay time included in the timing information of the parameter information by the lighting unit 120 in the next lighting pattern. Lighting can be controlled. In the same way, the controller 140 may control the lighting unit 120 to be turned on while delaying the lighting patterns included in the selection pattern information by the lighting delay time, and then turn off the lighting unit 120.

Meanwhile, the control apparatus 200 may transmit a plurality of photographing trigger signals to the photographing unit 130 one by one in response to the lighting patterns included in the selection pattern information. In this case, the transmission timing of each of the photographing trigger signals may be after a timing at which the lighting control is completed by each of the lighting patterns included in the selection pattern information. As a result, the photographing unit 130 may perform photographing for a predetermined time whenever the lighting unit 120 is turned on one by one according to the lighting patterns. Thereafter, the plurality of images photographed by the photographing unit 130 may be displayed on the display device while being generated one by one or in real time every time they are generated and transmitted to the control device 200 at once. For example, a plurality of images displayed through the display device may be displayed as shown in FIG. 22.

FIG. 23 is a conceptual diagram illustrating that a triggering process of the control method of FIG. 14 is driven in a second triggering mode, and FIG. 24 is a waveform diagram illustrating timing of the second triggering mode of FIG. 23.

23 and 24, when the control mode of the lighting apparatus 100 is determined as the second trigger mode based on the mode information of the parameter information, the lighting apparatus 100 is driven in the second trigger mode. Can be.

In detail, when the control device 200 transmits an illumination trigger signal to the controller 140, the controller 140 responds to the illumination trigger signal received from the control device 200. ) And the photographing unit 130 may be controlled.

First, the control unit 140 may control lighting to one of the first lighting patterns in order among the plurality of lighting patterns included in the selection pattern information in response to the lighting trigger signal transmitted from the control device 200. . Then, after the lighting control by the lighting pattern is completed in the lighting unit 120, the control unit 140 delays the lighting delay time included in the timing information of the parameter information by the lighting unit 120 in the next lighting pattern. Lighting can be controlled. In the same way, the controller 140 may control the lighting unit 120 to be turned on while delaying the lighting patterns included in the selection pattern information by the lighting delay time, and then turn off the lighting unit 120.

In response to the lighting patterns included in the selection pattern information, the controller 140 may transmit a plurality of photographing trigger signals to the photographing unit 130 one by one. In this case, the transmission time of each of the photographing trigger signals may be a point of time delayed by the photographing delay time included in the timing information of the parameter information after the lighting control is started by each of the lighting patterns included in the selection pattern information. As a result, the photographing unit 130 may perform photographing for a predetermined time whenever the lighting unit 120 is turned on one by one according to the lighting patterns. Thereafter, the plurality of images photographed by the photographing unit 130 may be displayed on the display device while being generated one by one or in real time every time they are generated and transmitted to the control device 200 at once.

FIG. 25 is a conceptual diagram illustrating that a triggering process of the control method of FIG. 14 is driven in a third triggering mode, and FIG. 26 is a waveform diagram illustrating timing of the third triggering mode of FIG. 25.

25 and 26, when the control mode of the lighting apparatus 100 is determined as the third trigger mode by the mode information of the parameter information, the lighting apparatus 100 is driven in the third trigger mode. Can be.

In detail, when the external control device 300 transmits an illumination trigger signal to the controller 140, the controller 140 responds to the illumination trigger signal received from the control device 200. 120 and the photographing unit 130 may be controlled.

First, when the control unit 140 receives an illumination trigger signal from the external control device 300, the controller 140 delays by a trigger delay time included in the timing information of the parameter information, and the plurality of lighting patterns included in the selection pattern information. The lighting control can be controlled by the one lighting pattern that is the first in the sequence. Then, after the lighting control by the lighting pattern is completed in the lighting unit 120, the control unit 140 delays the lighting delay time included in the timing information of the parameter information by the lighting unit 120 in the next lighting pattern. Lighting can be controlled. In the same way, the controller 140 may control the lighting unit 120 to be turned on while delaying the lighting patterns included in the selection pattern information by the lighting delay time, and then turn off the lighting unit 120.

In response to the lighting patterns included in the selection pattern information, the controller 140 may transmit a plurality of photographing trigger signals to the photographing unit 130 one by one. In this case, the transmission time of each of the photographing trigger signals may be a point of time delayed by the photographing delay time included in the timing information of the parameter information after the lighting control is started by each of the lighting patterns included in the selection pattern information. As a result, the photographing unit 130 may perform photographing for a predetermined time whenever the lighting unit 120 is turned on one by one according to the lighting patterns. Thereafter, the plurality of images photographed by the photographing unit 130 may be displayed on the display device while being generated one by one or in real time every time they are generated and transmitted to the control device 200 at once.

FIG. 27 is a conceptual diagram illustrating that a triggering process of the control method of FIG. 14 is driven in a fourth triggering mode, and FIG. 28 is a waveform diagram illustrating timing of the fourth triggering mode of FIG. 27.

27 and 28, when the control mode of the lighting apparatus 100 is determined as the fourth trigger mode based on the mode information of the parameter information, the lighting apparatus 100 is driven in the fourth trigger mode. Can be.

In detail, when the external control device 300 transmits an illumination trigger signal to the controller 140, the controller 140 responds to the illumination trigger signal received from the control device 200. 120 and the photographing unit 130 may be controlled.

First, when the control unit 140 receives an illumination trigger signal from the external control device 300, the controller 140 delays the lighting delay time included in the timing information of the parameter information, and thus, the plurality of lighting patterns included in the selection pattern information. The lighting control can be controlled by the first lighting pattern that comes first in the sequence.

Thereafter, the control unit 140 delays the shooting delay time included in the timing information of the parameter information after the control by the first lighting pattern is started, and transmits the first shooting trigger signal to the shooting unit 130. Can be. In this case, the transmission time point of the first photographing trigger signal may be after a time point at which the control by the first lighting pattern is completed.

Thereafter, the photographing unit 140 may generate a first image by performing photographing for a predetermined time in response to the first photographing trigger signal. In addition, the photographing unit 140 may transmit the first photographing completion signal to the controller 140 after the photographing by the first photographing trigger signal is completed.

Subsequently, when the controller 140 receives the first photographing completion signal from the photographing unit 140, the controller 140 may control lighting to a second lighting pattern among a plurality of lighting patterns included in the selection pattern information.

Thereafter, the controller 140 may delay the photographing delay time by the photographing delay time after the control by the second lighting pattern is started, and transmit the second photographing trigger signal to the photographing unit 130. In this case, the transmission time point of the second photographing trigger signal may be after a time point when the control by the second lighting pattern is completed.

Thereafter, the photographing unit 140 may generate a second image by performing photographing for a predetermined time in response to the second photographing trigger signal. In addition, the photographing unit 140 may transmit a second photographing completion signal to the controller 140 after the photographing by the second photographing trigger signal is completed.

In this manner, the controller 140 may control lighting of the lighting unit 120 by one of the lighting patterns included in the selection pattern information, and the photographing unit 130 may have an image corresponding to the lighting patterns. You can shoot them one by one. In this case, when the control unit 140 controls the lighting unit 120 to turn on the lighting patterns included in the selection pattern information, the lighting unit 120 may be turned off.

Meanwhile, the plurality of images photographed by the photographing unit 130 may be displayed on the display device while being transmitted to the control device 200 at once and generated in real time or after all are generated one by one every time they are generated.

As such, according to the present exemplary embodiment, as the user generates the desired lighting pattern by using the control device 200 and transmits the desired lighting pattern to the lighting device 100, the lighting device 100 may have the lighting pattern desired by the user. As can be freely controlled, various image data for the measurement object MT can be obtained.

In addition, as the user generates the desired parameter information by using the control device 200 and transmits the desired parameter information to the lighting device 100, the lighting device 100 may be controlled according to the user desired parameter information. . For example, when a user selects any one trigger mode through the control device 200 and transmits the trigger mode to the lighting device 100, the lighting device 100 may be driven in the trigger mode selected by the user.

Although the detailed description of the present invention described above has been described with reference to preferred embodiments of the present invention, those skilled in the art or those skilled in the art will have the idea of the present invention described in the claims to be described below. And various modifications and variations of the present invention without departing from the scope of the art. Therefore, the above description and the drawings below should be construed as illustrating the present invention, not limiting the technical spirit of the present invention.

100: lighting system 110: measuring stage
120: lighting unit 130: shooting unit
140: control unit MT: measuring object
150: beam separation unit 160: housing
200: control device 300: external control device

Claims (20)

An illumination unit for irradiating light to the measurement object including a plurality of light sources that can be individually controlled to light, a photographing unit for receiving the light reflected by the illumination unit reflected from the measurement object to generate an image of the measurement object, And a control unit for individually controlling the light sources; And
And a control device which provides the controller with pattern information including at least one lighting pattern for determining a light source to be turned on among the light sources, and controls the controller to turn on the lighting unit according to the pattern information. The method of claim 1,
The control device
Transmitting parameter information including mode information for determining one of a plurality of trigger modes for operating the lighting device, to the controller;
The lighting device
Illumination system, characterized in that driven in the trigger mode determined from the mode information. The method of claim 2,
The parameter information is
And timing information for determining a timing of a control signal for controlling the lighting device. The method of claim 3,
The trigger modes
S / W trigger mode for starting the driving of the lighting device by the lighting trigger signal generated by the control device; And
And an H / W trigger mode for starting the driving of the lighting device by the lighting trigger signal generated by an external control device. The method of claim 4, wherein
The S / W trigger mode is
When the control device transmits an illumination trigger signal to the control unit, the control unit includes a first trigger mode for controlling the driving of the lighting unit in response to the light trigger signal received from the control device,
The control device
And when the controller is driven in the first trigger mode, controlling a driving of the photographing unit by transmitting a photographing trigger signal to the photographing unit. The method of claim 5,
The first trigger mode is
When the control device transmits an illumination trigger signal to the control unit, the control unit includes one by one of the plurality of lighting patterns included in the pattern information in order in response to the illumination trigger signal received from the control device. The lighting unit is controlled to be turned on while delaying by a predetermined lighting delay time,
The control device
When the control unit is driven in the first trigger mode, the illumination system to control the driving of the photographing unit by transmitting a plurality of photographing trigger signals corresponding to the lighting patterns included in the pattern information to the photographing unit one by one . The method of claim 6,
The transmission time of each of the photographing trigger signals is
Illumination system, characterized in that after the time point of the lighting control is completed by each of the lighting patterns included in the pattern information. The method of claim 4, wherein
The S / W trigger mode is
When the controller transmits an illumination trigger signal to the controller, the controller controls the driving of the lighting unit in response to the illumination trigger signal received from the controller, while transmitting a photographing trigger signal to the photographing unit to drive the photographing unit. And a second trigger mode to control the lighting system. The method of claim 8,
The second trigger mode is
When the control device transmits an illumination trigger signal to the control unit, the control unit includes one by one of the plurality of lighting patterns included in the pattern information in order in response to the illumination trigger signal received from the control device. Lighting the lighting unit while delaying the lighting delay time and transmitting a plurality of shooting trigger signals corresponding to the lighting patterns included in the pattern information to the imaging unit one by one to control driving of the imaging unit system. The method of claim 9,
The transmission time of each of the photographing trigger signals is
And a time delayed by a shooting delay time included in the timing information after the lighting control of the lighting unit is started by each of the lighting patterns included in the pattern information. The method of claim 4, wherein
The H / W trigger mode is
When the external control device transmits an illumination trigger signal to the control unit, the control unit controls the driving of the illumination unit in response to an illumination trigger signal received from the external control device, and transmits an image capture trigger signal to the image capture unit to capture the image. And a third trigger mode for controlling the driving of the negative. The method of claim 11,
The third trigger mode is
When the control unit receives the lighting trigger signal from the external control device, the driving unit controls the driving of the lighting unit by controlling the driving of the lighting unit by delaying the trigger delay time included in the timing information, and controlling the driving of the shooting unit. Lighting system, characterized in that. The method of claim 11,
The third trigger mode is
When the external control device transmits an illumination trigger signal to the control unit, the control unit controls the timing information in order of one of a plurality of lighting patterns included in the pattern information in response to the illumination trigger signal received from the external control device. Controlling the lighting of the lighting unit while delaying the lighting delay time included in the lighting unit, and controlling driving of the photographing unit by transmitting a plurality of photographing trigger signals corresponding to the lighting patterns included in the pattern information to the photographing unit one by one. Lighting system. The method of claim 13,
The transmission time of each of the photographing trigger signals is
And a time delayed by a shooting delay time included in the timing information after the lighting control of the lighting unit is started by each of the lighting patterns included in the pattern information. The method of claim 4, wherein
The H / W trigger mode is
When the external control device transmits an illumination trigger signal to the controller, the controller controls the initial driving in the lighting unit in response to the illumination trigger signal received from the external control device, and transmits a shooting trigger signal to the photographing unit. And a fourth trigger mode for controlling driving of the photographing unit and controlling driving after the initial driving in the lighting unit in response to a photographing completion signal provided from the photographing unit. The method of claim 15,
The fourth trigger mode is
When the controller receives the illumination trigger signal from the external control device, the controller delays the trigger delay time included in the timing information to control initial driving of the lighting unit, and transmits a photographing trigger signal to the photographing unit to drive the photographing unit. And controlling driving after the initial driving in the lighting unit in response to a shooting completion signal provided from the shooting unit. The method of claim 15,
The fourth trigger mode is
When the external control device transmits an illumination trigger signal to the control unit, the lighting unit is the first lighting pattern among a plurality of lighting patterns included in the pattern information in response to the lighting trigger signal received from the external control device. While controlling the lighting, by transmitting the first trigger signal to the photographing unit to control the first driving of the photographing unit, and receives the first photographing completion signal from the photographing unit,
Thereafter, the controller controls the pattern information in response to an N-th photographing completion signal including the first photographing completion signal until the lighting control of the lighting unit is completed for all of the plurality of lighting patterns included in the pattern information. After lighting the lighting unit with an N + 1th lighting pattern among a plurality of lighting patterns included, the N + 1th trigger signal is transmitted to the photographing unit to control the N + 1th driving of the photographing unit, and then the photographing unit Lighting system, characterized in that receiving an N + 1th shooting completion signal from the data source, where N is an integer of 1 or more. The method of claim 17,
The time point at which the N + 1th shooting completion signal is transmitted from the photographing unit to the controller is
Illumination system, characterized in that after the time point that the N-th drive of the photographing unit is completed. Transmitting, by the control device, the pattern information to the lighting device; And
Lighting the lighting apparatus according to the pattern information;
The lighting device
An illumination unit for irradiating light to the measurement object including a plurality of light sources that can be individually controlled to light, a photographing unit for receiving the light reflected by the illumination unit reflected from the measurement object to generate an image of the measurement object, And a controller for individually controlling the light sources to be turned on according to the pattern information.
The pattern information
And at least one lighting pattern for determining a light source to be turned on among the light sources. The method of claim 19,
Transmitting, by the control device, parameter information including mode information for determining one of a plurality of trigger modes for operating the lighting device, to the controller;
And the lighting device is driven in a trigger mode determined from the mode information.

Images