Optical system device

Abstract

The purpose of the present invention is to provide an optical system device capable of irradiating linear light with a simple configuration. This optical system device is provided with: an optical element (2) in which lenses (21) are periodically arranged at a pitch (Px) in the x direction and a pitch (Py) in the y direction; and an irradiation unit (1) in which the light sources (10) are arranged at a pitch Qx in the x direction and a pitch Qy in the y direction, where j, k, m, and n are natural numbers equal to or greater than 1, and the focal lengths of the lens (21) to the first focal point and the second focal point are respectively f1 and f2, the distance (L1) between the irradiation unit (1) and the first focal point surface (111) of the lens (21) satisfies formula 1, and the pitch of the light sources (10) of the irradiation unit (1) satisfies Qx = jPy or jQx = Px, the distance L2 between the irradiation unit 1 and the second focal plane 112 of the lens 21 does not satisfy formula 2, or the pitch of the light source 10 of the irradiation unit 1 does not satisfy Qy = kPy and kQy = Py. (1)... (2)

Description

Technical Field

[0001] This invention relates to an optical system device. Background Technology

[0002] In recent years, the development of virtual reality (VR) technology, which enables the presentation of computer-created virtual spaces and other virtual environments as if they were real, has been booming. In VR, users perceive images through a head-mounted display (HMD). For HMDs, there is a need to provide images by tracking the user's eye movements or viewpoints, and technologies such as tracking methods or devices for this method are under development. Eye tracking methods include those that install special contact lenses on the eyes and measure their movement, or those that measure the electrical potential generated by muscles that cause eye movements by placing electrodes around the eyes. However, the procedures and cumbersome nature of these methods are problematic because they require the placement of contact lenses or electrodes on the user. On the other hand, methods or devices that use optical techniques for measurement without direct contact between the object and the eye are also being researched (e.g., Patent Document 1). Furthermore, as a conventional optical technology, optical system devices for illuminating dot patterns have been proposed (e.g., Patent Document 2).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: International Publication No. 2021 / 173276

[0006] Patent Document 2: International Publication No. 2021 / 229848 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, the complexity or high cost of such devices make it difficult to say that a satisfactory device has been provided. Furthermore, there is a need for eye tracking using linear light rays through light cutoff, without using dot patterns. Therefore, the object of this invention is to provide an optical system device capable of illuminating linear light rays with a simple structure.

[0009] Technical means to solve the problem

[0010] To achieve the aforementioned objective, the optical system device of the present invention is characterized by comprising: optical elements, and lenses that allow light of wavelength λ to pass through at a distance P in the x-direction. xThe spacing P in the y-direction perpendicular to the x-direction y The lenses are arranged periodically; and the irradiation section illuminates light of wavelength λ onto the light source of the plurality of lenses at a spacing Q in the x-direction. x Spacing Q in the y direction y Arranged as follows: if j, k, m, and n are set to natural numbers greater than or equal to 1, and the focal length of the lens based on the cross-sectional shape perpendicular to the y-direction to the first focal point is set to f1, the focal length based on the cross-sectional shape perpendicular to the x-direction to the second focal point is set to f2, the plane containing the first focal point and perpendicular to the z-direction is set to the first focal plane, and the plane containing the second focal point and perpendicular to the z-direction is set to the second focal plane, then the distance L1 between the irradiation part and the first focal plane of the lens satisfies the following equation 1:

[0011] ...(Formula 1)

[0012] Furthermore, the spacing between the light sources of the irradiation section satisfies Q. x =jP y or jQ x =P x ,

[0013] The distance L2 between the irradiation part and the second focal plane of the lens does not satisfy the following equation 2:

[0014] ... (Equation 2)

[0015] Alternatively, the spacing between the light sources of the irradiation section does not satisfy Q. y =kP y and kQ y =P y .

[0016] Furthermore, the optical system device of the present invention is characterized by comprising: optical elements, and lenses that allow light of wavelength λ to pass through at a distance P in the x-direction. x The spacing P in the y-direction perpendicular to the x-direction y The lenses are arranged periodically; and the irradiation section illuminates light of wavelength λ onto the light source of the plurality of lenses at a spacing Q in the y direction. y Arranged in a row, if k, m, and n are set to natural numbers greater than or equal to 1, and the focal length of the lens based on the cross-sectional shape perpendicular to the y-direction to the first focal point is set to f1, the focal length based on the cross-sectional shape perpendicular to the x-direction to the second focal point is set to f2, the plane containing the first focal point and perpendicular to the z-direction is set to the first focal plane, and the plane containing the second focal point and perpendicular to the z-direction is set to the second focal plane, then the distance L1 between the irradiation part and the first focal plane of the lens satisfies the following equation 1:

[0017] ...(Formula 1)

[0018] The distance L2 between the irradiation part and the second focal plane of the lens does not satisfy the following equation 2:

[0019] ... (Equation 2)

[0020] Alternatively, the spacing between the light sources of the irradiation section does not satisfy Q. y =kP y and kQ y =P y .

[0021] Furthermore, the optical system device of the present invention is characterized by comprising: optical elements, and lenses that allow light of wavelength λ to pass through at a distance P in the x-direction. x The spacing P in the y-direction perpendicular to the x-direction y The lenses are arranged periodically; and the irradiation section has a light source that irradiates light of wavelength λ onto the plurality of lenses. If m and n are natural numbers greater than or equal to 1, and the focal length of the lens based on the cross-sectional shape perpendicular to the y-direction to the first focal point is set as f1, the focal length based on the cross-sectional shape perpendicular to the x-direction to the second focal point is set as f2, the plane containing the first focal point and perpendicular to the z-direction is set as the first focal plane, and the plane containing the second focal point and perpendicular to the z-direction is set as the second focal plane, then the distance L1 between the irradiation section and the first focal plane of the lens satisfies the following equation 1:

[0022] ...(Formula 1)

[0023] The distance L2 between the irradiation part and the second focal plane of the lens does not satisfy the following equation 2:

[0024] ... (Equation 2).

[0025] Here, the distance L1 is preferably satisfied by the following equation 3:

[0026] ... (Formula 3).

[0027] Here, the irradiation section may be an irradiation section in which the light sources are arranged in a hexagonal pattern.

[0028] Additionally, it may include: a camera unit for receiving light from the object; and a calculation unit for calculating the distance to the object based on information from the camera unit.

[0029] Furthermore, it is preferable that the computing unit can calculate the distance to the object using both the optical truncation method and the time of flight (TOF) method.

[0030] Furthermore, the optical system device of the present invention may have a plurality of the aforementioned irradiation units, and includes a control unit for controlling the illumination of each of the irradiation units.

[0031] The effects of the invention

[0032] The optical system device of the present invention can provide an optical system device capable of irradiating linear light with a simple structure. Attached Figure Description

[0033] [ Figure 1 [A] is a schematic cross-sectional view showing the optical system device of (a) and (b) of the present invention and a perspective view showing the lens of (c).

[0034] [ Figure 2 [Illustration 1] is a plan view showing the optical element of the present invention.

[0035] [ Figure 3 [Illustration 1] is a plan view showing the irradiation section of the present invention.

[0036] [ Figure 4 [ ] is a diagram illustrating the irradiation section used in the simulation of the present invention.

[0037] [ Figure 5 [Illustration 1] is a diagram showing the lens shape of the optical element used in the simulation of the present invention.

[0038] [ Figure 6 [Illustration] is a projection diagram showing the simulation results of the present invention.

[0039] [ Figure 7 [Illustration 1] is a diagram showing the lens shape of an optical element used in an embodiment of the present invention.

[0040] [ Figure 8 [Illustration] is a projection diagram showing the results of an embodiment of the present invention.

[0041] [ Figure 9 [Illustration 1] is a schematic plan view showing the optical system device of the present invention. Detailed Implementation

[0042] The optical system device of the present invention will now be described. The optical system device of the present invention is as follows: Figure 1 As shown, it mainly includes an optical element 2 and an irradiation unit 1. Here, if the mutually perpendicular directions are defined as the x-direction, y-direction, and z-direction, and the optical axis direction of the optical element 2 is defined as the z-direction, then... Figure 1 (a) is a diagram of the optical system setup when viewed along the y-direction. Figure 1 (b) is a diagram of the optical system apparatus for viewing along the x-direction.

[0043] Optical element 2 is a lens 21 that allows light of wavelength λ to pass through at a distance P in the x-direction. x The spacing P in the y-direction perpendicular to the x-direction y They are arranged periodically. Furthermore, for lens 21, the focal length to the first focal point based on the cross-sectional shape perpendicular to the y-direction is set as f1, and the focal length to the second focal point based on the cross-sectional shape perpendicular to the x-direction is set as f2. Additionally, in this specification, the focal length is as follows... Figure 5 The distance shown refers to the distance between the surface of the lens 21 closest to the focal point and the focal point. Furthermore, the lens 21 is configured such that the focal point is located on the irradiation portion 1 side of the lens 21. The larger the focal length f of the optical element 2 of the present invention, such as 10 μm or more, 20 μm or more, 40 μm or more, or 60 μm or more, the better the contrast can be.

[0044] The shape of lens 21 can be freely designed to satisfy the conditions described later. For example, the shape of lens 21 can be set as a spherical lens with f1=f2 or an aspherical lens with f1≠f2. Specific lens shapes include, for example, convex lenses or concave lenses. Furthermore, the periodic arrangement of lenses 21 can be as follows: Figure 2 (a) shows a planar arrangement of square or rectangular lenses in a top-down view, or as shown in the image. Figure 2 (b) shows the hexagonal lenses arranged in a hexagonal configuration when viewed from above. Furthermore, lens 21 can be any lens as long as it functions as a lens; for example, a Fresnel lens, a diffraction optical element (DOE) lens, or a metalens can also be used. Additionally, it is preferable to form a reflection-preventing film on lens 21 to prevent light reflection from the irradiation section 1.

[0045] The illumination unit 1 has a light source 10 that illuminates light of wavelength λ onto a plurality of lenses 21. For example... Figure 3 As shown in (a) and (b), the irradiation section 1 has the following structure: the light source 10 has a spacing Q in the x direction. x Spacing Q in the y direction y Arrangement. The arrangement of the light sources 10 can be any arrangement as long as it is periodic, for example, it can use... Figure 3 The arrangement can be square or hexagonal, as shown. Additionally, the irradiation section 1 can also be as follows: Figure 3 (c) shows the light source 10 with a spacing Q in the y direction. y Arranged in a row. This type of illumination section 1 can also be an illumination section with multiple light sources by passing light from a single light source or multiple light sources through an aperture with multiple fine holes. Furthermore, when the illumination section 1 is composed of multiple light sources, it is preferable that the light sources 10 are formed on the same plane. Additionally, as... Figure 3As shown in (d), the irradiation section 1 may also be an irradiation section having only one light source 10. Specific examples of the irradiation section 1 include, for instance, vertical-cavity surface-emitting lasers (VCSELs) that are expected to have high output with relatively low power consumption. VCSELs can be single-emitter VCSELs having a single light source 10 capable of irradiating light in a direction perpendicular to the emitting surface, or multi-emitter VCSELs having multiple light sources 10. Furthermore, in the irradiation section 1, since noise caused by reflected light is not introduced, it is preferable to form a light-absorbing film on the portion other than the light source 10. Additionally, the light source 10 used for the irradiation section 1 can be any light source that irradiates light of wavelength λ onto the multiple lenses 21.

[0046] The irradiation unit 1 and the optical element 2 are configured such that the optical axis direction of the light source 10 of the irradiation unit 1 is consistent with the optical axis direction of the lens 21 of the optical element 2.

[0047] [Positional relationship between irradiation unit 1 and optical element 2]

[0048] Next, regarding the use of light source 10 with a spacing Q in the x-direction... x Spacing Q in the y direction y In the case where the arranged irradiation sections are designated as irradiation section 1, the positional relationship between irradiation section 1 and optical element 2 will be explained. Here, j, k, m, and n are set to natural numbers greater than or equal to 1. The focal length of lens 21 based on its cross-sectional shape perpendicular to the y-direction to the first focal point is set to f1, and the focal length based on its cross-sectional shape perpendicular to the x-direction to the second focal point is set to f2. Furthermore, the plane containing the first focal point and perpendicular to the z-direction is designated as the first focal plane, and the plane containing the second focal point and perpendicular to the z-direction is designated as the second focal plane. Additionally, the wavelength of the light incident from irradiation section 1 is set to λ. In this case, the distance L1 between irradiation section 1 and the first focal plane 111 of lens 21 satisfies the following equation α:

[0049] ...(Equation α)

[0050] Furthermore, the spacing of the light sources 10 in the irradiation section 1 satisfies Q. x =jP x or jQ x =P x Here, in equation α, 'a' and 'b' refer to coefficients representing the allowable error, satisfying a≦1 and b≦1. Furthermore, a smaller coefficient 'a' in equation α is preferred, such as a=0.5, a=0.3, or a=0.1. Similarly, a smaller coefficient 'b' is also preferred, such as b=0.5, b=0.3, or b=0.1. When the coefficients of equation α are a=b=1, equation α becomes equation 1 below.

[0051] ...(Formula 1)

[0052] Furthermore, the distance L2 between the irradiation section 1 and the second focal plane 112 of the lens 21 does not satisfy the following equation β:

[0053] ...(Equation β)

[0054] Alternatively, the spacing of the light sources 10 in the irradiation section 1 does not satisfy Q. y =kP y and kQ y =P y Furthermore, the coefficient c of equation β is c≧1, and can also be set to c=2, c=3, or c=5. Additionally, the coefficient d is also d≧1, and can be set to d=2, d=3, or d=5. When the coefficient of equation β is c=d=1, equation β becomes equation 2 below.

[0055] ... (Equation 2)

[0056] With this configuration, a linear beam of light extending in the y-direction can be emitted. Furthermore, in this specification, distances L1 and L2 refer to the distance (optical path length) that light travels in a vacuum within the same time it takes to travel through the medium. If the refractive index of the medium is set to N and the actual distance is set to L, then their product NL represents the optical path length.

[0057] Here, the optimal distance L1 satisfies the following equation 3.

[0058] ... (Formula 3)

[0059] Furthermore, it is preferable to configure the distance L2 so that it does not satisfy Equation 2, and consequently also does not satisfy Q. y =kP y and kQ y =P y .

[0060] Additionally, regarding the use of light source 10 with a spacing Q in the y direction... y In the case where the irradiation sections arranged in a row are designated as irradiation section 1, the positional relationship between irradiation section 1 and optical element 2 will be explained. Here, k, m, and n are set to natural numbers greater than or equal to 1, and the focal length of lens 21 based on the cross-sectional shape perpendicular to the y-direction is set to f1, and the focal length based on the cross-sectional shape perpendicular to the x-direction is set to f2. In this case, the distance L1 between irradiation section 1 and the first focal plane 111 of lens 21 is configured to satisfy the aforementioned equation α. ​​Furthermore, when the coefficients of equation α are a=b=1, equation α becomes Equation 1 as follows.

[0061] ...(Formula 1)

[0062] Furthermore, the distance L2 between the irradiation section 1 and the second focal plane 112 of the lens 21 does not satisfy the following equation β:

[0063] ...(Equation β)

[0064] Alternatively, the spacing of the light sources 10 in the irradiation section 1 does not satisfy Q. y =kP y and kQ y =P y Furthermore, the coefficient c of equation β is c≧1, and can also be set to c=2, c=3, or c=5. Similarly, the coefficient d is also d≧1, and can also be set to d=2, d=3, or d=5. When the coefficient of equation β is c=d=1, equation β becomes equation 2 below.

[0065] ... (Equation 2)

[0066] With this configuration, linear light extending in the y-direction can be emitted.

[0067] Here, the optimal distance L1 satisfies the following equation 3.

[0068] ... (Formula 3)

[0069] Furthermore, it is preferable to configure the distance L2 so that it does not satisfy Equation 2, and consequently also does not satisfy Q. y =kP y and kQ y =P y .

[0070] Furthermore, regarding the case where the irradiation unit 1 has only one light source 10, the positional relationship between the irradiation unit 1 and the optical element 2 will be explained. Here, m and n are set to natural numbers greater than or equal to 1, the focal length of the lens 21 based on the cross-sectional shape perpendicular to the y-direction is set to f1, and the focal length based on the cross-sectional shape perpendicular to the x-direction is set to f2. In this case, the distance L1 between the irradiation unit 1 and the first focal plane 111 of the lens 21 is configured to satisfy the aforementioned equation α. ​​Furthermore, when the coefficients of equation α are a=b=1, equation α becomes the following equation 1.

[0071] ...(Formula 1)

[0072] It is configured to satisfy the given formula.

[0073] Furthermore, the distance L2 between the irradiation section 1 and the second focal plane 112 of the lens 21 does not satisfy the following formula β.

[0074] ...(Equation β)

[0075] Furthermore, the coefficient c of equation β is c≧1, and can also be set to c=2, c=3, or c=5. Similarly, the coefficient d is also d≧1, and can also be set to d=2, d=3, or d=5. When the coefficient of equation β is c=d=1, equation β becomes equation 2 below.

[0076] ... (Equation 2)

[0077] With this configuration, linear light extending in the y-direction can be emitted.

[0078] Here, the optimal choice is when the distance L1 satisfies the following equation 3.

[0079] ... (Formula 3)

[0080] [simulation]

[0081] Next, the light intensity distribution of the optical system device of the present invention in the far field was simulated. Furthermore, the optical simulation software BeamPROP (manufactured by Synopsys) was used in the simulation.

[0082] Irradiation unit 1 uses an irradiation unit with a wavelength of 940 nm (λ=0.94), and as follows: Figure 4 The light source 10, which is used to illuminate the bat wing with light distribution, is arranged in a hexagonal pattern with a spacing of 40 μm (Q). x =40, Q y The irradiation section is formed by arranging elements such as (69.3) in a manner consistent with the optical element. The optical element 2 utilizes... Figure 5 The lens 21 shown is spaced at P x Become 20 μm (P x =20), P y Become 58 μm (P y Optical elements arranged in a square (=58) manner. Additionally, such as... Figure 5 As shown, lens 21 uses a lens with the following structure: it is rectangular in shape (20 μm x-direction, 58 μm y-direction) when viewed from above, with a height of 26 μm. The focal length to the first focal point, based on the cross-sectional shape perpendicular to the y-direction, is 12 μm (f1=12), and the focal length to the second focal point, based on the cross-sectional shape perpendicular to the x-direction, is 28 μm (f2=28). Furthermore, the refractive index of the lens is set to 1.53. The distance L1 between the irradiation section 1 and the first focal plane 111 of the optical element 2 is set to 2128 μm.

[0083] In this case, the distance L1 satisfies Equation 3 (m=10). Additionally, it satisfies Q.x =2P x On the other hand, due to the distance difference between the first focal plane 111 and the second focal plane 112, the distance L2 between the irradiation part 1 and the second focal plane 112 of the optical element 2 becomes 2112 μm. This does not satisfy Equation 2. Furthermore, it also does not satisfy Q. y =kP y and kQ y =P y .

[0084] Figure 6 The projection diagram, representing the simulation result, is shown. For example... Figure 6 As shown, a projection image of lines extending in the y direction was obtained.

[0085] [Example]

[0086] Regarding the optical system device of the present invention, the light intensity distribution was measured using an actual light source 10 and optical element 2.

[0087] Irradiation unit 1 uses the following irradiation unit: four light sources 10 irradiating with light of wavelength 940 nm (λ=0.94) and bat wing light distribution are arranged in a row with a spacing of 7.25 μm (Q y The irradiation section is formed by (=7.25). Optical element 2 uses... Figure 7 The lens 21 shown is spaced at P x Become 13 μm (P x =13), P y Become 29 μm (P y Optical elements arranged in a square (=29) manner. Additionally, such as... Figure 7 As shown, lens 21 uses a lens with the following structure: it is rectangular in shape (13 μm x-direction, 29 μm y-direction) when viewed from above, with a height of 24.59 μm. The focal length to the first focal point, based on the cross-sectional shape perpendicular to the y-direction, is 5 μm (f1=5), and the focal length to the second focal point, based on the cross-sectional shape perpendicular to the x-direction, is 5 μm (f2=5). Furthermore, the refractive index of the lens is set to 1.53. The distance L1 between the irradiation section 1 and the first focal plane 111 of the optical element 2, and the distance L2 between the irradiation section 1 and the second focal plane 112, are set to 360 μm.

[0088] In this case, distance L1 satisfies equation 3 (m=4). On the other hand, distance L2 does not satisfy equation 2. Furthermore, it satisfies 4Q. y =P y .

[0089] Figure 8 A projection view showing the lens 21 of the optical system device 22 mm forward. Figure 8Figures (1) to (4) are projection diagrams when the four light sources 10 emit light individually. Additionally, Figure 8 (5) is the projection diagram when all four light sources 10 are emitting light. In this case, it can be seen that the light from each light source 10 overlaps to form a linear projection diagram.

[0090] In addition, such as Figure 9 As shown, the optical system device of the present invention may include a camera unit 3 for receiving light from an object. The camera unit 3 is used to detect light reflected back from the object 9 from the light irradiated by the irradiation unit 1, and convert information such as its position or light intensity into digital data. The camera unit 3 can be any camera unit as long as it can detect reflected light and convert its information into digital data; for example, existing image sensors such as complementary metal-oxide-semiconductor (CMOS) or charge-coupled device (CCD) can be used. Furthermore, the camera unit 3 and the irradiation unit 1 can be entirely formed on the same semiconductor chip. In addition, when using the optical system device of the present invention for triangulation, it is preferable to arrange the light irradiation unit 1 and the camera unit 3 at a predetermined distance in the horizontal direction. Specifically, it is preferable to arrange them at a distance of 3 cm or more, more preferably 5 cm or more, and even more preferably 10 cm or more. For example, the light irradiation unit 1 and the camera unit 3 can be respectively arranged on the left and right lenses or edges of glasses used in VR (virtual reality) or augmented reality (AR).

[0091] Furthermore, the optical system device of the present invention may also include a calculation unit 4, which calculates the distance to the object 9 based on information from the imaging unit 3. Here, the distance to the object 9 refers to the distance between the irradiation unit 1 or optical element 2, imaging unit 3, etc., which serve as a reference, and the object 9. The calculation unit 4 can calculate the distance to the object 9 in any way. For example, it can calculate the distance between the irradiation unit 1 and the object 9 based on the time it takes for light irradiated from the irradiation unit 1 to be reflected by the object 9 and received by the imaging unit 3, as in the TOF (Time of Flight) method. Alternatively, it can calculate the distance between the irradiation unit 1 and the object 9 using triangulation based on changes in the position of the lines, as in the light cutoff method. Additionally, it can calculate the distance by changing the number of illumination points of the same type of irradiation unit 1, based on the presence or absence of lines or the light intensity of the lines that can be detected by the imaging unit 3. The distance between the irradiation unit 1 and the object 9 calculated in this way can be used for various techniques such as three-dimensional measurement or autofocus.

[0092] Furthermore, the light intercept method and triangulation method are methods for calculating the distance to the object 9 by measuring the angle. Therefore, if the distance to the object 9 increases, the angle of change decreases, and the error increases. On the other hand, the TOF method calculates the distance between the irradiation unit 1 and the object 9 based on the time it takes for light irradiated from the irradiation unit 1 to be reflected by the object 9 and received by the imaging unit 3. Therefore, if the distance to the object 9 decreases, the time becomes shorter, and the error increases. Therefore, it is preferable that the calculation unit 4 can calculate the distance to the object 9 using both the light intercept method and the TOF method. With this configuration, the result measured by the light intercept method is used when the distance to the object 9 is relatively close, and the result measured by the TOF method is used when the distance to the object 9 is relatively far, thus enabling more accurate distance measurement.

[0093] Furthermore, the optical system device of the present invention may have multiple illumination units 1. Here, if the illumination units with periodically overlapping light sources in the x-direction are designated as the same type of illumination units, the linear light illuminated by the same type of illumination units overlaps with each other. Conversely, if the illumination units with periodically non-overlapping light sources in the x-direction are designated as different types of illumination units, the linear light illuminated by the different types of illumination units does not overlap with each other, and their positions are shifted. Therefore, as long as the number of illumination units of the same type can be controlled, the light intensity of the lines can be adjusted. Furthermore, as long as the illumination of different types of illumination units can be controlled in a switchable manner, the position of the lines can be adjusted. Furthermore, as long as the number of illumination units of different types can be controlled, the number of lines can also be adjusted. Thus, the optical system device of the present invention may also include a control unit 5 for controlling the illumination of each illumination unit. In addition, the illumination unit 1 may of course be configured to include both the different types of illumination units and the same type of illumination units.

[0094] The control unit 5 controls the illumination of each illumination unit 1. The control unit 5 can control the illumination units 1 in any way, for example, it can control the illumination of each illumination unit 1 based on distance information calculated by the calculation unit. As a method of controlling the illumination of the illumination units 1, for example, it can be controlled such that: the smaller the distance to the object 9, the more different types of illumination units are illuminated; the larger the distance to the object 9, the fewer different types of illumination units are illuminated. If controlled in this way, when the distance to the object 9 is small, the number of lines can be increased to improve resolution; when the distance to the object 9 is large, the number of lines can be reduced to reduce energy consumption.

[0095] Alternatively, as another method of controlling the illumination of the irradiation unit 1 by the control unit 5, it can be controlled such that: the smaller the distance to the object 9, the fewer the number of the same type of irradiation units are illuminated; and the larger the distance to the object 9, the more the number of the same type of irradiation units are illuminated. With such control, when the distance to the object 9 is small, the light intensity of the lines can be reduced to decrease energy consumption; and when the distance to the object 9 is large, the light intensity of the lines can be increased to perform long-distance measurements.

[0096] Alternatively, as another method of controlling the illumination of the irradiation unit 1 by the control unit 5, it is also possible to control the illumination of different types of irradiation units 1 sequentially. Therefore, since the position of the lines changes, the calculation unit 4 can calculate the distance between the irradiation unit 1 and the object 9 using triangulation based on the change in line position.

[0097] As a control unit, it can be any unit as long as it can control the illumination of the light source for each illumination unit based on the information from the camera unit 3. For example, an existing computer or central processing unit (CPU) can be used.

[0098] Explanation of icon numbers

[0099] 1: Irradiation part

[0100] 2: Optical components

[0101] 3: Camera Department

[0102] 4: Computation Department

[0103] 5: Control Department

[0104] 9: Object

[0105] 10: Light source

[0106] 21: Lens

[0107] 111: First focal plane

[0108] 112: Second Focal Plane

Claims

1. An optical system device, characterized in that, include: Optical elements, lenses that allow light of wavelength λ to pass through at a distance P in the x-direction. x The spacing P in the y-direction perpendicular to the x-direction y Arranged periodically; as well as The irradiation section illuminates light of wavelength λ onto the light source of the plurality of lenses at a spacing Q in the x-direction. x Spacing Q in the y direction y Arranged in order, If j, k, m, and n are set to natural numbers greater than or equal to 1, and the focal length of the lens based on the cross-sectional shape perpendicular to the y-direction to the first focal point is set to f1, the focal length based on the cross-sectional shape perpendicular to the x-direction to the second focal point is set to f2, the plane containing the first focal point and perpendicular to the z-direction is set to the first focal plane, and the plane containing the second focal point and perpendicular to the z-direction is set to the second focal plane, then The distance L1 between the irradiation part and the first focal plane of the lens satisfies the following equation: ...(Formula 1) Furthermore, the spacing between the light sources of the irradiation section satisfies Q. x =jP x or jQ x =P x , The distance L2 between the irradiation part and the second focal plane of the lens does not satisfy the following equation 2: ... (Equation 2) Alternatively, the spacing between the light sources of the irradiation section does not satisfy Q. y =kP y and kQ y =P y .

2. An optical system device, characterized in that, include: Optical elements, lenses that allow light of wavelength λ to pass through at a distance P in the x-direction. x The spacing P in the y-direction perpendicular to the x-direction y Arranged periodically; as well as The irradiation section illuminates light of wavelength λ onto the light source of the plurality of lenses at a spacing Q in the y-direction. y Arranged in a row If k, m, and n are set to natural numbers greater than or equal to 1, and the focal length of the lens based on the cross-sectional shape perpendicular to the y-direction to the first focal point is set to f1, the focal length based on the cross-sectional shape perpendicular to the x-direction to the second focal point is set to f2, the plane containing the first focal point and perpendicular to the z-direction is set to the first focal plane, and the plane containing the second focal point and perpendicular to the z-direction is set to the second focal plane, then The distance L1 between the irradiation part and the first focal plane of the lens satisfies the following equation: ...(Formula 1) The distance L2 between the irradiation part and the second focal plane of the lens does not satisfy the following equation 2: ... (Equation 2) Alternatively, the spacing between the light sources of the irradiation section does not satisfy Q. y =kP y and kQ y =P y .

3. An optical system device, characterized in that, include: Optical elements, lenses that allow light of wavelength λ to pass through at a distance P in the x-direction. x The spacing P in the y-direction perpendicular to the x-direction y Arranged periodically; as well as The illumination section includes a light source that illuminates light of wavelength λ onto the plurality of lenses. If m and n are set to natural numbers greater than or equal to 1, and the focal length of the lens based on the cross-sectional shape perpendicular to the y-direction to the first focal point is set to f1, the focal length based on the cross-sectional shape perpendicular to the x-direction to the second focal point is set to f2, the plane containing the first focal point and perpendicular to the z-direction is set to the first focal plane, and the plane containing the second focal point and perpendicular to the z-direction is set to the second focal plane, then The distance L1 between the irradiation part and the first focal plane of the lens satisfies the following equation: ...(Formula 1) The distance L2 between the irradiation part and the second focal plane of the lens does not satisfy the following equation 2: ... (Equation 2).

4. The optical system apparatus according to any one of claims 1 to 3, characterized in that, The distance L1 satisfies the following equation 3: ... (Formula 3).

5. The optical system device according to claim 1, characterized in that, The irradiation section is an irradiation section in which the light source is arranged in a hexagonal pattern.

6. The optical system apparatus according to any one of claims 1 to 3, characterized in that, include: The camera unit receives light from the object. as well as The arithmetic unit calculates the distance to the object based on information from the camera unit.

7. The optical system device according to claim 6, characterized in that, The computing unit can calculate the distance to the object using both the light cutoff method and the time-of-flight method.

8. The optical system apparatus according to any one of claims 1 to 3, characterized in that, It has multiple irradiation sections, and This includes a control unit that controls the illumination of each of the irradiation units.

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