KR101968195B1 - Oral Scanner Having All direction View Angle - Google Patents

Abstract

According to an embodiment of the present invention, an oral scanner having a full-field angle of view includes: a omnidirectional lens; A cone mirror for reflecting the light reflected from the subject to the omnidirectional lens; A lens array unit for improving the efficiency of light from the omnidirectional lens; And an image sensor receiving the light from the lens array unit and providing an oral scanner having a full-field angle of view.

Description

(Oral Scanner Having All Directions View Angle)

The present invention relates to an oral scanner having an omnidirectional angle of view. And more particularly, to an oral scanner having an omnidirectional angle of view capable of photographing an entire area of a subject using only a minimum photographing using a 360-degree angle of view of the omnidirectional lens.

 Non-contact scanners that use laser or light have a wide range of applications. There is a wide range of applications such as engineering, film, animation, industrial design, medical, artwork, fancy, cultural materials, restoration and entertainment.

Especially, in order to shorten the manufacturing time of the product in the industrial field, many investments and research are carried out, and the scanner is used for the purpose of reducing the cost at various stages during the development and mass production of the product. Being able to handle what exists in reality as three-dimensional digital data has many advantages. You do not have to work every day in dangerous places, you can open the necessary information back to your computer at any time, and accurate real-world 3D dimension and shape information makes the future more accurate by simulation and duplication process.

Scanners are also used in the medical field to create customized instruments for the shape of patients to make orthodontic appliances, teeth, and so on.

However, the conventional scanner is inserted into the oral cavity to photograph only the maximum number of teeth, and there is a problem that the inconvenience of the patient is increased due to an increase in time to be inserted into the oral cavity. In addition, there is a problem in that the precision of the manufactured artificial tooth is greatly reduced due to the cumulative error occurring when the images generated according to the plurality of photographs are synthesized when generating the three-dimensional model of the teeth in the oral cavity of the patient for the production of artificial teeth have.

Also, there is a limitation in manufacturing positive artifacts in a very short time due to an increase in time required for scanning a subject and an increase in time required for synthesizing a plurality of images.

In this regard, JP5784381 B2 discloses a scanner capable of photographing the entire teeth of an upper or lower mandible using a spherical reflector. However, in the case of a fish-eye lens having a wide angle of view, There is a serious problem of distortion.

In addition, in the case of teeth in the oral cavity, there is a problem that the fisheye lens is disposed to surround the edge of the oral cavity.

Patent Document 1: JP5784381 B2

The embodiment of the present invention can provide a scanner capable of scanning at a time even a subject having a complex angle of view and having a full angle of view.

A scanner having a full-field angle of view according to an embodiment of the present invention includes: a omnidirectional lens; A cone mirror for reflecting the light reflected from the subject to the omnidirectional lens; A lens array unit for improving the efficiency of light from the omnidirectional lens; And an image sensor receiving the light from the lens array unit and providing the scanner with a full-field angle of view.

According to another aspect of the present invention, the cone mirror of the scanner having a full-field angle of view may also be provided with a scanner having a panoramic angle shape with a reflecting plate on the side thereof.

According to still another aspect of the present invention, there is provided a scanner having an omnidirectional angle of view further including a mirror unit for converting a path of light transmitted from the omnidirectional lens and transmitting the converted light to the lens array unit .

According to another aspect of the present invention, the lens array unit of the scanner having the omnidirectional angle of view further includes a scanner having a full-field angle of view including a first lens receiving light transmitted from the omnidirectional lens and convex on one surface and the other surface You may.

According to another aspect of the present invention, the lens array portion of the scanner having a full-field angle of view further includes a second lens which receives the light transmitted from the first lens and convex on one surface and the other surface, . ≪ / RTI >

According to another aspect of the present invention, there is provided a scanner having a full-field angle of view, the lens array unit including a third lens having a concave surface and a convex surface convex on one side thereof, Lt; RTI ID = 0.0 > scanner. ≪ / RTI >

According to still another aspect of the present invention, the lens array unit of the scanner having the full angle of view angle may further include a fourth lens having a convex surface and a concave surface, the first lens having a convex surface on one side, Lt; RTI ID = 0.0 > scanner. ≪ / RTI >

According to another aspect of the present invention, there is also provided a scanner having an omnidirectional angle of view such that the other surface of the second lens of the scanner having the omnidirectional angle of view and one surface of the third lens are in contact with each other.

Further, the first to fourth lenses and the image sensor of the scanner having a full-field angle of view according to another embodiment of the present invention are arranged side by side along a first optical axis, and the omnidirectional lens and the cone- It is also possible to provide a scanner having a full-field angle of view that is arranged along a second vertical optical axis.

According to still another aspect of the present invention, there is provided a scanner having an omnidirectional angle of view whose refractive index varies according to a voltage applied between the lens array unit and the image sensor, It is possible.

According to still another aspect of the present invention, there is provided a scanner having the omnidirectional angle of view of a scanner having an omnidirectional angle of view, a scanner having an omnidirectional angle of view that images a light received from the image sensor to generate a three- You may.

The embodiment of the present invention is able to move the focusing which is hard to realize in the existing lens optical system by applying the refractive index variable lens, and thus the lens of the conventional fisheye lens is designed to have a high depth to solve the problem that the image can not be stored at a distance, .

Further, in the embodiment of the present invention, the entire area of the subject, not the partial area, can be photographed using a scanner having a full-field angle of view, so that the quality of the photographed image can be improved.

In addition, it is possible to solve the cumulative error problem caused by the image synthesis process due to a plurality of shots when generating a three-dimensional model of a subject, minimize the data processing time required in the image synthesis process, By creating a dimensional model, the accuracy of the 3D model can be greatly improved.

Also, when the embodiment of the present invention is used for medical use, satisfaction of surgeon and patient can be increased due to minimization of scan time.

In addition, the scanner having an omnidirectional angle of view according to the embodiment of the present invention can perform auto focusing and depth measurement according to the focus using a refractive index variable lens whose refractive index is varied by an external voltage, It is possible to prevent the occurrence of problems such as service life.

Also, since the scanner having a full-angle-of-view angle according to the embodiment of the present invention can change the focus area of the subject according to the refractive index of the refractive index varying lens and the focus area of the subject according to the refractive index change of the cone mirror, Two focus areas can be photographed, which can improve the resolution of the image data due to the reduction of the photographing time and the decrease in the number of photographing times.

In addition, when the embodiment of the present invention is used as an oral scanner, it is not necessary to apply powder to the oral cavity to prevent light reflection according to saliva of the oral cavity, and the oral cavity can be scanned before the saliva of the oral cavity increases to a problem level.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a diagram illustrating an internal structure of a scanner having a full-field angle of view according to an embodiment of the present invention. FIG.
1B is a cross-sectional view of a scanner having a full-field angle of view according to another embodiment of the present invention;
2 is a sectional view of the omnidirectional lens;
3 is a front view of the omnidirectional lens.
4 is a sectional view of the first lens.
5 is a sectional view of a second lens;
6 is a sectional view of the third lens.
7 is a sectional view of the fourth lens.
8 is a cross-sectional view of a scanner having an omnidirectional angle of view according to another embodiment of the present invention taken along the longitudinal direction.
9 is a sectional view taken along the longitudinal direction of a scanner having a full-field angle of view according to another embodiment of the present invention including a liquid lens.
10 is a view showing that the focus changes according to a voltage applied to a liquid lens;
11 is a sectional view of a liquid lens;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a scanner having an omnidirectional angle of view according to an embodiment of the present invention will be described in detail with reference to the drawings. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the size and thickness of an apparatus may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. However, it should be understood that the present invention is not limited to the embodiments disclosed herein but may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. The dimensions and relative sizes of the layers and regions in the figures may be exaggerated for clarity of illustration.

The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprise "and / or" comprising ", as used in the specification, means that the presence of stated elements, Or additions.

FIG. 1A is a view showing an internal structure of a scanner having a full-field angle of view according to an embodiment of the present invention.

1A, a scanner 10 having an omnidirectional angle of view according to an embodiment of the present invention includes an omnidirectional lens 100, a lens array unit 200, a prism 300, an image sensor 400, and a cone mirror 500 ).

The omnidirectional lens 100, the lens array unit 200, the mirror unit 300, the image sensor 400, and the cone mirror 500 may be housed in a single case.

The lens array unit 200 and the image sensor 400 are arranged along the first optical axis O.1 and the omnidirectional lens 100 and the cone mirror 500 are arranged in a direction perpendicular to the first optical axis O.1 2 optical axis O.2. The mirror unit 300 may change the path of the light traveling along the second optical axis O.2 to the first optical axis O.1.

The mirror unit 300 may be a mirror for converting the path of light, or may be a prism. Therefore, when the area where the omnidirectional lens 100 of the scanner 10 and the cone mirror 500 are disposed according to the embodiment is inserted into the oral cavity, for example, the mandible or the maxilla can be photographed. That is, the mirror unit 300 can easily receive the reflected light from the subject when the subject is positioned on an area perpendicular to the moving direction of the scanner 10 for scanning the subject.

The cone mirror 500 may have a conical shape. The cone mirror 500 may include a side surface and a bottom surface. Also, the second optical axis O.2 may pass the vertex of the cone mirror 500 and the center point of the bottom surface.

The side surface of the cone mirror 500 may be formed of a reflection plate 510 and the reflection plate 510 may be formed of nickel plating but is not limited thereto and may be formed of a material having high light reflection efficiency and / Any material can be used as long as it has low-distortion properties.

The angle of view of the reflection plate 510 of the cone mirror 500 may vary depending on the angle with the bottom surface 520. Also, the light reflected from the subject corresponding to 360 degrees ahead can be reflected by the cone mirror 500 and transmitted to the omnidirectional lens 100.

The cone mirror 500 is capable of receiving reflected light from the subject corresponding to the entire area of the side 510 of the cone mirror 500 despite the complex structure such as the oral cavity and the structural feature that the teeth are located at the edge of the mouth So that the entire area of the subject can be photographed at a time.

The lens array unit 200 can improve the light efficiency of the light to be transmitted from the omnidirectional lens 100 and transmit it to the image sensor 400. [

The lens array unit 200 may include at least one lens.

The lens array unit 200 may include first through fourth lenses 210, 220, 230, and 240.

The first lens 210 and the second lens 220 may be spaced apart from each other by a predetermined distance and the second lens and the third lens 220 and 230 may be disposed in contact with each other. The third lens 230 and the fourth lens 240 may be spaced apart from each other by a predetermined distance.

Also, although not shown in the drawing, the lens array unit 200 may further include at least one lens. Although not shown in the drawing, the lens array unit 200 may further include at least one lens disposed between the fourth lens 240 and the image sensor 400. As such, when the lens array unit 200 further includes at least one lens, the included lens may be disposed along the first optical axis O.1.

On the other hand, the fact that the lens is disposed along the optical axis means that the optical axis passes through the center point of the lens, and that the plurality of lenses can be disposed parallel to each other.

The image sensor 400 can change the light inputted as a full conversion element into an electrical signal. The image sensor 400 may output electrons generated by the input light or output electrons generated by the light into a voltage.

In addition, the scanner 10 according to the embodiment may further include an image processing unit to convert an electrical signal output from the image sensor 400 into a digital signal. It is also possible to adjust the color density to adjust the image to the closest to the external image. The image processing unit may include an analog-to-digital converter, and may include an amplifier for amplifying an output signal from the image sensor 400 and delivering it to its analog-to-digital converter. It may also include an image signal processor to obtain an image image from a digital signal. Further, the image processing unit may be integrally formed with the image sensor 400, or may be formed as a separate independent structure.

The scanner 10 having an omnidirectional angle of view according to an embodiment of the present invention may further include an image processing device capable of generating a two-dimensional or three-dimensional image of a subject using a signal output from the image sensor 400 have.

In addition, the scanner 10 having an omnidirectional angle of view according to an embodiment of the present invention may further include a communication unit, and may transmit a two-dimensional and / or three-dimensional image generated from the image processing apparatus to an external apparatus through a communication unit, The external apparatus can display the received image, and can generate a three-dimensional model of the object through the received image. The external device may also be a three-dimensional printer or milling device that may produce artifacts corresponding to a three-dimensional model. Also, the external device may be a device equipped with CAD / CAM (computer-aided design and computer-aided manufacturing) software as needed.

Also, the scanner 10 may perform wired and / or wireless communication with an external device. For example, it is preferable to use a wireless communication scheme such as WLAN (Wireless LAN), Wi-Fi, Wibro, WiMAX, HSDPA, (Fiber to the Curb), FTTH (Fiber To The Home), etc., depending on the system implementation method, such as USB (Universal Serial Bus), Ethernet, xDSL (ADSL, VDSL), Hybrid Fiber Coaxial Cable May be used. Bluetooth, RFID, IrDA, Ultra Wideband (UWB), ZigBee, Near Field Communication (NFC), and the like may be used as the short distance communication technology.

Also, the external device may be a computing device, and the external device may include at least one memory device connected to a bus and a bus, at least one processor, a plurality of presentation devices, input / output ports, input / output devices, And may include a power supply. The memory device may include a hard disk, volatile memory, a buffer, and the like. And the processor can control overall data communication of the terminal 20. [ And the presentation device may include a graphics card, a monitor device, and a display device. The input / output port can provide connection of peripheral devices such as a digital camera, a printer, a microphone, a speaker, and an external storage device. The input / output device may be a digital camera, a printer, a speaker, or an external storage device.

1B is a cross-sectional view of a scanner having a full-field angle of view according to another embodiment of the present invention.

Referring to FIG. 1B, the scanner 10 having a wide angle of view according to another embodiment of the present invention may further include a light guide unit 250.

The light guide unit 250 is disposed between the first lens 210 and the second lens 220 and fixedly supports the first and second lenses 210 and 220 and has a protrusion 251 along the inner surface thereof. So that light output from the edge region of the first lens 210 can be blocked. Therefore, it is possible to block unwanted reflected light input within an angle range deviated from the view angle of the cone mirror 500. Since the unnecessary reflected light may hinder the quality of the three-dimensional image data due to the problem of diluting the reflected light necessary for generating the three-dimensional image data, unnecessary reflected light is blocked through the light guide unit 250, Can be greatly increased.

Unnecessary reflected light can be blocked even within the angle of view of the cone mirror 500 in accordance with the degree of protrusion of the protrusion 251. [

2 is a sectional view of the omnidirectional lens, Fig. 3 is a front view of the omnidirectional lens, Fig. 4 is a sectional view of the first lens, Fig. 5 is a sectional view of the second lens, Is a sectional view of the fourth lens.

Referring to FIG. 2, one side 110 and one side 120 of the omnidirectional lens 100 of the scanner 10 having an omnidirectional angle of view according to an embodiment of the present invention may be concave. One surface 110 may be defined as a concave surface 110 of the first omnidirectional lens and the other surface 120 may be defined as a concave surface 120 of the second omnidirectional lens.

The omnidirectional lens 100 according to the embodiment of the present invention may be a lens having a 360 degree angle of view. Thus, the omnidirectional image received from the cone mirror 500 can be received.

Further, the omnidirectional lens 100 may disperse the light reflected from the cone mirror 500 and spread the angle of view. The specific shape of the omnidirectional lens 100 for effectively performing such a function is as follows.

The first radius of curvature of the concave surface 110 of the first omnidirectional lens is 8.000 mm (CC) more than 8 mm (Concave: CC), the radius of curvature of the concave surface 120 of the second omnidirectional lens The second radius of curvature of the concave surface is preferably 4.370 mm (CC) more than 4.370 mm (CC). The radius tolerance of the radius of curvature of the concave surface 110 of the first omnidirectional lens may be +0.0297 mm and the tolerance of the radius of curvature of the concave surface 120 of the second omnidirectional lens may be +0.0111 mm .

Here, the radius of curvature can be defined as the distance between the vertex of the omnidirectional lens 100 and the center of curvature.

The ratio of power to irregularity representing the surface precision of the concave surfaces 110 and 120 of the first and second omnidirectional lenses may be more than 3: 1 and 3.0: 1.0 . Power is a type of surface precision that is compared to a reference surface with a radius of curvature that precisely corrects the surface of the lens. Irregularity is also one of the types of surface precision that indicates the shape of the surface of the reference surface It is how much different it is.

Further, the omnidirectional lens 100 may be composed of an optical component and a housing surrounding the optical component. In the case of an optical component diameter (Clear Aperture Diameter: CA DIA) representing the diameter of the optical component, The concave surface 110 of the omnidirectional lens may be 4.160 mm more than 4.160 mm and the concave surface 120 of the second omnidirectional lens may be 3.720 mm more specifically 3.720 mm.

Further, the diameter of the housing of the omnidirectional lens 100 (Edge Diameter: Edge DIA) may be 5.00 mm, more specifically 5 mm. Diameter tolerance (DIA TOL) can be + - 0.0250mm more than + - 0.025mm.

The center thickness of the omnidirectional lens 100 is a thickness measured at the center of the omnidirectional lens 100, and may be 0.6 mm or more, more specifically 0.6 mm. Thickness tolerance (THI TOL) can be + - 0.0250mm more than + - 0.025mm.

Also, the wedge angle of the omnidirectional lens 100 may be 2 seconds (2 ').

However, the above-mentioned tolerances may vary depending on the production environment, and the numerical values given are examples.

On the other hand, one surface 110 of the omnidirectional lens 100 faces the cone mirror 500, and the other surface 120 faces the mirror unit 300.

Further, the omnidirectional lens 100 may be formed as an aspherical surface.

Referring to FIG. 4, one surface 211 and the other surface 212 of the first lens 210 of the scanner 10 having an omnidirectional angle of view according to an embodiment of the present invention may be convex surfaces. The first surface 211 may be defined as the convex surface 211 of the first lens and the second surface 212 may be defined as the convex surface 212 of the first lens.

The first lens 210 according to the embodiment of the present invention can collect light of a predetermined energy or more to the image sensor 400.

The specific shape of the first lens 210 for effectively performing such a function is as follows.

The first radius of curvature of the convex surface 211 of the first lens is 18.180 mm (Convex: CX) more than 18.18 mm (CX), the convex surface of the 1-2 lens The second radius of curvature of the convex surface 212 is preferably 18.180 mm (CX) rather than 18.18 mm (CX). The radii tolerance of the radius of curvature of the convex surface 211 of the 1-1 lens may be +0.1085 mm and the tolerance of the radius of curvature of the convex surface 212 of the 1-2 lens may be + 0.1085 mm.

Here, the radius of curvature can be defined as the distance between the apex of the first lens 210 and the center of curvature.

In addition, the ratio of the power and the degree of illusoryness of the convex surfaces 211 and 212 of the 1-1 and 1-2 lenses may be 3.0: 1.0, more specifically 3: 1.

The first lens 210 may be composed of an optical component and a housing surrounding the optical component. In the case of the optical component diameter (CA DIA) indicating the diameter of the optical component, The convex surface 211 may be 3.860 mm more than 3.86 mm, and the convex surface 212 of the 1-2 lens may be 3.680 mm more than 3.68 mm.

In addition, the diameter of the housing of the first lens 210 (Edge DIA) may be 5.00 mm, more specifically 5 mm. And the diameter tolerance (DIA TOL) can be + - 0.0250mm more than + - 0.025mm.

Also, the center thickness of the first lens 210 is a thickness measured at the center of the first lens 210, and may be 2.000 mm, more specifically, 2 mm. Thickness tolerance (THI TOL) can be + - 0.0250mm more than + - 0.025mm.

Also, the wedge angle of the first lens 210 may be 2 seconds (2 ').

However, the above-mentioned tolerances may vary depending on the production environment, and the numerical values given are examples.

One surface 211 of the first lens 210 faces the mirror 300 and the other surface 212 faces the second lens 220.

5, one surface 221 and the other surface 222 of the second lens 220 of the scanner 10 having an omnidirectional angle of view according to the embodiment of the present invention may be convex surfaces. The one surface 221 may be defined as the convex surface 221 of the 2-1 lens and the other surface 222 may be defined as the convex surface 222 of the 2-2 lens.

The second lens 220 according to the embodiment of the present invention can improve the chromatic aberration. The specific shape of the second lens 220 for effectively performing such a function is as follows.

The first radius of curvature of the convex surface 221 of the 2-1 lens is 26.200 mm (Convex: CX) in more detail than 26.2 mm, the convex surface 222 of the 2nd- The second radius of curvature of the convex surface is preferably 4.500 mm (CX) more than 4.5 mm (CX). The radii tolerance of the radius of curvature of the convex surface 221 of the second-first lens may be +0.2725 mm and the tolerance of the radius of curvature of the convex surface 222 of the second- 0.0074 mm.

Here, the radius of curvature may be defined as the distance between the apex of the second lens 220 and the center of curvature.

In addition, the ratio of the power and the degree of illus- trativity of the convex surfaces 221 and 222 of the 2-1 and 2-2 lenses may be 3.0: 1.0 in more detail than 3: 1.

The second lens 220 may be composed of an optical component and a housing surrounding the optical component. In the case of the optical component diameter (CA DIA) indicating the diameter of the optical component, The convex surface 221 may be 4.500 mm in detail, and the convex surface 222 of the 2-2-th lens may be 4.680 mm in more detail than 4.68 mm.

Also, the diameter of the housing of the second lens 220 (Edge DIA) may be 6.00 mm, more specifically 6 mm. And the diameter tolerance (DIA TOL) can be + - 0.0250mm more than + - 0.025mm.

Also, the center thickness of the second lens 220 is a thickness measured at the center of the second lens 220, and may be 2.000 mm, more specifically 2 mm. Thickness tolerance (THI TOL) can be + - 0.0250mm more than + - 0.025mm.

Further, the wedge angle of the second lens 220 may be 2 seconds (2 ').

However, the above-mentioned tolerances may vary depending on the production environment, and the numerical values given are examples.

Meanwhile, one surface 221 of the second lens 220 faces the first lens 210, and the other surface 222 faces the third lens 230.

Referring to FIG. 6, the third lens 230 of the scanner 10 having an omnidirectional angle of view according to an embodiment of the present invention may have one surface 231 as a concave surface and the other surface 232 as a convex surface . The one surface 231 may be defined as the concave surface 231 of the third lens and the other surface 232 may be defined as the convex surface 232 of the third lens.

The third lens 230 according to the embodiment of the present invention may function to improve the chromatic aberration together with the second lens 220. The specific shape of the third lens 230 for effectively performing such a function is as follows.

The first radius of curvature of the concave surface 231 of the third lens is 4.500 mm (CC) more than 4.5 mm (CC), the radius of curvature of the convex surface 232 of the third lens The second radius of curvature of the convex surface is preferably 17 mm (CX) more than 17 mm (CX). The radii tolerance of the radius of curvature of the concave surface 231 of the third lens may be +0.0074 mm and the tolerance of the radius of curvature of the convex surface 232 of the third lens may be +0.0952 mm .

Here, the radius of curvature can be defined as the distance between the apex of the third lens 230 and the center of curvature.

Also, the ratio of the power and the degree of illusoryness of the concave surface 231 of the third lens and the convex surface 232 of the third lens may be 3.0: 1.0, more specifically, 3: 1.

The third lens 230 may be composed of an optical component and a housing surrounding the optical component. In the case of an optical component diameter (CA DIA) representing the diameter of the optical component, The convex surface 231 of the third lens may be 4.680 mm, more specifically 4.68 mm, and the convex surface 232 of the third lens may be 4.940 mm, more specifically 4.940 mm.

In addition, the diameter of the housing of the third lens 230 (Edge DIA) may be 6.00 mm, more specifically 6 mm. And the diameter tolerance (DIA TOL) can be + - 0.0250mm more than + - 0.025mm.

The center thickness of the third lens 230 is a thickness measured at the center of the third lens 230, and may be 0.6 mm or more, more specifically 0.6 mm. Thickness tolerance (THI TOL) can be + - 0.0250mm more than + - 0.025mm.

Also, the wedge angle of the third lens 230 may be 2 seconds (2 ').

However, the above-mentioned tolerances may vary depending on the production environment, and the numerical values given are examples.

On the other hand, one surface 231 of the third lens 230 faces the second lens 220, and the other surface 232 faces the fourth lens 240.

Referring to FIG. 7, the fourth lens 240 of the scanner 10 having an omnidirectional angle of view according to an embodiment of the present invention may have a convex surface on one side 241 and a convex surface on the other side 242 . The one surface 241 may be defined as the convex surface 241 of the fourth lens and the other surface 242 may be defined as the concave surface 242 of the fourth lens.

The fourth lens 240 according to the embodiment of the present invention can collect light of a predetermined energy or more to the image sensor 400.

The specific configuration of the fourth lens 240 for effectively performing such a function is as follows.

The first radius of curvature of the convex surface 241 of the fourth lens is 6.6 mm (CX) more than 6.6 mm (CX), the radius of curvature of the concave surface 242 of the fourth lens The second radius of curvature of concave surface is preferably 59.14 mm (CC), more preferably 59.14 mm (CC). The radii tolerance of the radius of curvature of the convex surface 241 of the fourth lens may be +0.0134 mm and the tolerance of the radius of curvature of the concave surface 242 of the fourth lens may be +0.1808 mm .

Here, the radius of curvature can be defined as the distance between the apex of the fourth lens 240 and the center of curvature.

Further, the ratio of the power and the degree of illus- trativity of the convex surface 241 of the fourth lens and the concave surface 242 of the fourth lens may be 3.0: 1.0 in more than 3: 1.

The fourth lens 240 may be composed of an optical component and a housing surrounding the optical component. In the case of the optical component diameter (CA DIA) indicating the diameter of the optical component, The concave surface 231 of the fourth lens may be 5.120 mm more than 5.12 mm and the concave surface 242 of the fourth lens may be 4.880 mm more than 4.88 mm.

In addition, the diameter of the housing of the fourth lens 240 (Edge DIA) may be 6.00 mm, more specifically 6 mm. And the diameter tolerance (DIA TOL) can be + - 0.0250mm more than + - 0.025mm.

Also, the center thickness of the fourth lens 240 is a thickness measured at the center of the fourth lens 240, which may be 1.7 mm or more, more specifically 1.700 mm. Thickness tolerance (THI TOL) can be + - 0.0250mm more than + - 0.025mm.

Also, the wedge angle of the fourth lens 240 may be 2 seconds (2 ').

However, the above-mentioned tolerances may vary depending on the production environment, and the numerical values given are examples.

On the other hand, one surface 241 of the fourth lens 240 faces the third lens 240, and the other surface 242 faces the image sensor 400.

8 is a cross-sectional view of a scanner having an omnidirectional angle of view according to another embodiment of the present invention taken along the longitudinal direction.

Referring to FIG. 8, the scanner 10 having a wide angle of view according to an embodiment of the present invention may further include a cone mirror cover 530.

The cone mirror cover 530 may be disposed to surround the bottom surface 520 and the side surface 510 of the cone mirror 500.

The cone mirror cover 530 has a cone mirror cover lower side portion 531 that contacts the bottom surface 520 of the cone mirror 500 and supports the bottom surface 520 and a cone mirror cover lower side portion 531 that vertically And may include a cone mirror cover side portion 532 that extends to face the side surface 510 of the cone mirror 500.

The cone mirror cover 530 may be quartz, but is not limited thereto, and may be made of any material capable of passing light while maintaining a slight level of light scattering and light refraction, It is possible.

9 is a sectional view taken along the longitudinal direction of a scanner having a full-field angle of view according to another embodiment of the present invention including a liquid lens. 10 is a view showing that the focus is changed according to a voltage applied to the liquid lens, and FIG. 11 is a sectional view of the liquid lens.

9 to 11, a scanner 10 having an omnidirectional angle of view according to another embodiment of the present invention includes a first optical axis O.1 between a lens array unit 200 and an image sensor 400, And may further include a refractive index variation lens 600 disposed thereon.

In addition, the scanner 10 includes an image processing unit 30. The image processing unit 30 can process a signal received from the image sensor 400 to generate a three-dimensional model of the subject, 400) drive control, and a control function capable of controlling the refractive index variation lens 600, and this control function may be performed by a separate processor.

The image processing unit 30 can adjust the voltage applied to the refractive index variable lens 600 and the focus of the light can be adjusted according to the voltage applied to the refractive index variable lens 600 as shown in FIG.

The refractive index variable lens 600 can vary the refractive index of light passing through the fixed axis with respect to the optical axis based on the control signal.

The refractive index variable lens 600 has various configurations. For example, in the form of a variable bending plate. The refractive index variable lens 600 composed of a variable refractive sheet may include a plurality of liquid crystal cells that are optically changed in response to an applied driving voltage. For example, a plurality of liquid crystal cells may be dispersed in a matrix substrate, and refractive index and / or viewing angle may be adjusted. Therefore, when the driving voltage is applied, the refractive index of the variable refractive sheet changes. As shown in FIG. 11, the light can be transmitted as it is without changing the refractive index when the voltage is not applied (for example, 0V). However, when a constant voltage is applied, the refractive index of the variable refractive sheet changes, and the distance (A, B) can be changed by making a spatial gradient (gradient) from the optical center to the edge.

That is, the refractive index varies according to the voltage applied to the refractive index variable lens 600, so that the focal distance can be adjusted. It is also possible to implement the auto focus function according to the focal length adjustment.

The refractive index variable lens 600 may be formed using a piezoelectric element in addition to the variable refractive sheet, or may be formed using a MEMS (Micro Electro Mechanical Systems) actuator, or may be constructed using a liquid lens. However, the present invention is not limited to this, and any structure can be used as long as it has a structure capable of varying the refractive index even in a fixed state without advancing or retracting the lens with respect to the optical axis O.1.

The embodiment of the present invention determines at least one focal plane of the subject according to the refractive index variable of the refractive index varying lens 600 and the intensity of the light reflected from the subject can be measured at various positions of the focal plane. And a three-dimensional image can be generated based on the position of the detected point through the maximum intensity of the reflected light.

The case where the refractive index variable lens 600 is constituted by a liquid lens will be described in more detail with reference to FIG.

The liquid lens 600 includes an oil layer 613 and an aqueous solution layer 614 laminated between the first protective glass 611 and the second protective glass 612 and between the first and second protective glasses 611 and 612, A first insulating portion 617 disposed between the first and second electrode portions 615 and 616 for insulating the first electrode portion 615 and the second electrode portion 616 and the first and second electrode portions 615 and 616, And a second insulating portion 618. [0064]

The liquid lens 600 is applied with power supplied from the outside to the first and second electrode portions 615 and 616 so that the radius of curvature and the thickness of the oil layer 613 are changed, The position of the focal point of the light can be changed.

More specifically, when a predetermined voltage is applied to the first and second electrode units 615 and 616, the radius of curvature and thickness of the oil layer 613 can be increased. By increasing the magnitude of the voltage, the focal distance can be shortened.

Also, the refractive index of the liquid lens 600 varies according to the voltage. However, the refractive index may vary depending on the pressure control.

In this case, the refractive index variable lens 600, which is a liquid lens, does not require a separate servo motor for the lens flow, thereby greatly reducing the manufacturing cost. Also, it is possible to obtain a three-dimensional image information quickly and precisely from the acquired image based on the previously stored change in refractive index.

Since the entire image of the subject can be obtained from the omnidirectional lens 100 having a 360 degree angle of view, the process of combining the partial regions of the subject can be minimized, and the error problem due to image combination can be greatly improved. Therefore, the resolution of the three-dimensional image can be greatly increased.

On the other hand, the image processing unit 30 can make the refractive index variable lens 600 have no refractive index, that is, a plane lens. In this case, the scanner 10 can shoot a moving picture of a subject.

The scanner 10 having a full-field angle of view according to an embodiment of the present invention can be used as a medical scanner. Also, the scanner 10 according to the embodiment of the present invention may be an oral scanner. The area where the cone mirror 500 of the scanner 10 and the omnidirectional lens 100 are located can be inserted into the oral cavity to photograph the mandible or the upper jaw.

In the embodiment of the present invention, the scanner 10 can take an entire mandible or an entire maxilla in one shot.

The embodiments of the present invention may also be used to scan an object in a space with a scanner for semiconductor inspection, enlarge and scan an object in the space, for example, to recognize the face of a person in a space.

Embodiments of the present invention can perform image reception from an omnidirectional lens having a 360 degree angle of view and scan over an entire area of a subject in a 360 degree angle of view.

Also, since the 3D image is generated by acquiring the image of the entire area of the subject from the omnidirectional lens and the cone mirror, the process of combining the images of the partial areas of the subject can be omitted or minimized, It is possible to generate a high quality and highly accurate three-dimensional image.

In addition, it is also possible to take a picture in a stereo or a still mode using a scanner according to an embodiment of the present invention, to photograph a subject once, take a plurality of pictures of the subject, move the omnidirectional lens through another moving means, have.

In addition, since the scanner according to the embodiment can minimize the number of times of photographing, the workload of the operator can be greatly reduced, and when the embodiment of the present invention is used for medical treatment, the patient's medical care and treatment time can be reduced, have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

10: Scanner with omnidirectional angle of view
100: omnidirectional lens
110: concave surface of the first omnidirectional lens
120: concave surface of the second omnidirectional lens
200: Lens array part
210: first lens
211: convex surface of the 1-1 lens
212: convex surface of the 1-2 lens
220: second lens
221: 2-1 convex surface of the lens
222: 2-2 convex surface of the lens
230: Third lens
231: concave surface of the third lens
232: convex surface of the third lens
240: fourth lens
241: convex surface of the fourth lens
242: concave surface of the fourth lens
300: mirror part
400: Image sensor
500: Cone mirror
510: reflector
520: bottom surface
530: Cone mirror cover part
531: Cone mirror cover lower side
532: Cone mirror cover side
600: refractive index variable lens, liquid lens
611: First protective glass
612: Second protective glass
611: First protective glass
612: Second protective glass
613: Oil layer
614: aqueous solution layer
615:
616:
617: first insulating portion
618:

Claims (7)

An omnidirectional lens having an omnidirectional angle of view;
A cone mirror for reflecting the light reflected from the subject to the omnidirectional lens;
A lens array unit for improving the efficiency of light from the omnidirectional lens;
An image sensor for receiving light from the lens array unit;
A refractive index variable lens for adjusting the focus of light; And
And an image processor for generating a three-dimensional image of the subject based on an output signal from the image sensor,
Wherein the lens array part includes a light guide part formed on an inner surface of the cone mirror, the protrusion part blocking reflected light input within an angular range outside the angle of view of the cone mirror
Oral scanner with omnidirectional angle of view. The method according to claim 1,
The cone mirror has a conical shape with a reflector on its side
Oral scanner with omnidirectional angle of view. The method according to claim 1,
And a mirror unit for converting a path of light transmitted from the omnidirectional lens and transmitting the converted light to the lens array unit
Oral scanner with omnidirectional angle of view. The method according to claim 1,
The lens array unit includes:
And a first lens which receives light transmitted from the omnidirectional lens and is convex on one surface and the other surface
Oral scanner with omnidirectional angle of view. 5. The method of claim 4,
The lens array unit includes:
And a second lens which receives light transmitted from the first lens and is convex on one surface and the other surface
Oral scanner with omnidirectional angle of view. 6. The method of claim 5,
The lens array unit includes:
And a third lens which receives the light transmitted from the second lens and convex on one side and convex on the other side
Oral scanner with omnidirectional angle of view. The method according to claim 6,
The lens array unit includes:
And a fourth lens which receives light transmitted from the third lens and is convex on one side and concave on the other side
Oral scanner with omnidirectional angle of view.

Images