Optical device, in-vehicle system, mobile device, and method for manufacturing optical device

Abstract

To provide an optical device that is positioned with high accuracy.SOLUTION: An optical device (800) has: first and second substrates (80, 90); an optical member that is held on at least one of the first and second substrates; and an adhesive (88) that bonds the first and second substrates to each other. The first substrate is provided with a first recess (82) into which the second substrate is inserted, a first contact part (81) that is in contact with the second substrate, and groove parts (83, 84, 85) into which part of the adhesive enters. The second substrate is provided with a second contact part (96) in contact with the first contact part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an optical device, an in-vehicle system, a mobile device, and a method for manufacturing an optical device.

Background Art

[0002] In recent years, in order to measure the inter-vehicle distance, a laser radar device using laser light, so-called LIDAR (Light Detection And Ranging), has been proposed. LIDAR can detect the presence or absence of an obstacle by irradiating a target area with laser light such as infrared light and detecting the reflected light, but it is necessary to adjust the shape of the laser light in the target area. Patent Document 1 discloses a lidar equipped with a converging lens for adjusting the shape of laser light.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to adjust the shape of the laser light, it is necessary to adjust the divergence angle of the laser light and the width of the laser light in the target area by changing the relative position between the light source and the lens. In the configuration of the lidar disclosed in Patent Document 1, the relative position between the light source and the lens cannot be adjusted with high precision.

[0005] Therefore, an object of the present invention is to provide an optical device, an in-vehicle device, a mobile device, and a method for manufacturing an optical device that are positioned with high precision.

Means for Solving the Problems

[0006] As an aspect of the present invention, an optical device includes a first and a second base material, an optical member held on at least one of the first and second base materials, and an adhesive for bonding the first and second base materials to each other. The first base material is provided with a first recess into which the second base material is inserted, a first abutting portion that abuts against the second base material, and a groove portion into which a part of the adhesive enters. The second base material is provided with a second abutting portion that abuts against the first abutting portion. and at least one of the first and second base materials is provided with a second recess in which the adhesive is disposed so as to bond the first and second base materials to each other, a gap is provided between the first and second base materials in a direction perpendicular to the contact direction of the first and second contact portions, and the groove portion is provided between the second recess and the gap is provided.

[0007] Other objects and features of the present invention will be described in the following embodiments.

Effects of the Invention

[0008] According to the present invention, an optical device, an in-vehicle device, a mobile device, and a method for manufacturing an optical device can be provided.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0011] (Comparative Example) First, with reference to FIGS. 8(a) and 8(b), an optical device as a comparative example will be described. FIGS. 8(a) and 8(b) are explanatory views of an optical device 700 as a comparative example. FIG. 8(a) is an exploded perspective view of the optical device 700, showing a state where a second substrate 75 is inserted into a first substrate 70. FIG. 8(b) is a cross-sectional view of the optical device 700, showing a state where the second substrate 75 is inserted into the first substrate 70, and a state where the contact surface 71 of the first substrate 70 and the contact surface 76 of the second substrate 75 are in contact in the Z-axis direction.

[0012] The optical device 700 is configured to include a first substrate 70 and a second substrate 75. A recess 72 into which the second substrate 75 can be inserted is formed in the first substrate 70. The contact surface 71 of the first substrate 70 is provided in the recess 72. An adhesive groove portion 77 that is one step lower is provided on the contact surface 76 of the second substrate 75, and an adhesive (thermosetting adhesive) 78 is filled between the adhesive groove portion 77 and the contact surface 71 of the first substrate 70. The first substrate 70 and the second substrate 75 are adhered by the adhesive 78. Further, at least one of the first substrate 70 and the second substrate 75 holds an optical member.

[0013] As the assembly procedure of the optical device 700, first, the thermosetting adhesive 78 is pre-filled in the adhesive groove portion 77 of the second substrate 75. Thereafter, the second substrate 75 is inserted into the recess 72 of the first substrate 70 until the contact surfaces 76 and 78 of both substrates come into contact, and the position in the Z-axis direction is determined by urging with a jig such as a spring (not shown) in the Z-axis direction. A gap 79 is provided in the X-axis direction and the Y-axis direction in FIG. 8(a) between the first substrate 70 and the second substrate 75, and the positions of both substrates in the X-axis direction and the Y-axis direction, as well as the relative position in the rotational direction θZ around the Z-axis, are adjustable. The contact surface 71 of the first substrate 70 and the contact surface 76 of the second substrate 75 are urged and brought into contact with each other in the Z-axis direction by a jig or the like. Then, while maintaining the position in the Z-axis direction, after adjusting the positions in the X-axis direction and the Y-axis direction, as well as the relative position in the rotational direction θZ around the Z-axis, it is heated for a certain period of time to cure the thermosetting adhesive 78.

[0014] In such a configuration, depending on the adjustment time and the number of adjustments for adjusting the relative positions of the first base material 70 and the second base material 75 in the X-axis direction, Y-axis direction, and around the Z-axis, the adhesive may flow into the gaps 79 between the two base materials in the X-axis direction and Y-axis direction before the adhesive cures. If it flows into the gaps 79 between the two base materials in the X-axis direction and Y-axis direction, positional deviation may occur with respect to the adjusted position during the curing process due to the shrinkage and curing of the adhesive.

[0015] (First Embodiment) Next, with reference to FIGS. 1(a) to 1(f), the optical device 800 in the first embodiment of the present invention will be described. FIGS. 1(a) to 1(f) are explanatory views of the optical device 800 in the present embodiment. FIG. 1(a) is an exploded perspective view of the optical device 800, showing a state where the second base material 90 is inserted into the first base material 80. FIGS. 1(b) to 1(f) are cross-sectional views of the optical device 800, showing a state where the second base material 90 is inserted into the first base material 80. Note that FIGS. 1(b) to 1(f) respectively show modified examples (optical devices 800a to 800e) of the optical device 800 in the present embodiment.

[0016] The optical device 800 of the present embodiment is configured to include a first base material 80 and a second base material 90. A recess (first recess) 82 into which the second base material 90 can be inserted is formed in the first base material 80. A contact surface (first contact portion) 81 of the first base material 80 is provided in the recess 82. An adhesive groove portion (second recess) 91 that is one step lower is provided in the contact surface (second contact portion) 96 of the second base material 90, and an adhesive (thermosetting adhesive) 88 is filled between the adhesive groove portion 91 and the contact surface 81 of the first base material 80. The first base material 80 and the second base material 90 are adhered by the adhesive 88. Further, at least one of the first base material 80 or the second base material 90 holds an optical member. The optical member is, for example, a lens that transmits light emitted from a light source.

[0017] In order to avoid misalignment during the manufacturing process of the first substrate 80 and the second substrate 90, as shown in Fig. 1(b), a relief groove (groove portion) 83 is provided on the side surface (corner portion) of the recess 82 of the first substrate 80. Note that the relief groove 83 is not limited to the side surface of the recess 82 and may be provided on the bottom surface of the recess 82. That is, the relief groove 83 is provided on at least one of the side surface or the bottom surface of the recess 82. Further, for example, if the recess 82 is hemispherical, the relief groove 83 may be provided on the surface constituting the hemispherical shape.

[0018] By providing the relief groove 83, even when adjusting the relative positions in the X-axis direction, Y-axis direction, and around the Z-axis between the first substrate 80 and the second substrate 90, the adhesive accumulation during the position adjustment fits into the relief groove 83. Therefore, it is possible to prevent the adhesive from flowing into the gaps 89 in the X-axis direction and Y-axis direction between the first substrate 80 and the second substrate 90. As a result, during the process of shrinkage and curing of the adhesive, it is possible to reduce the occurrence of misalignment with respect to the adjusted position (relative position) between the first substrate 90 and the second substrate 90, and high-precision positioning can be performed.

[0019] As described above, in the optical device 800 (800a) of the present embodiment, a relief groove 83 is formed at the corner of the recess 82 of the first substrate 80. However, the shape of the relief groove 83 is not limited to the shape shown in Fig. 1(b). For example, it may be a shape in which the adhesive accumulation during position adjustment fits, such as the relief groove 84 formed in the optical device 800b of Fig. 1(c) or the relief groove 85 formed in the optical device 800c of Fig. 1(d). That is, the first substrate 80 has a recess 82 into which the second substrate 90 is inserted, a contact surface 81 that contacts the second substrate 90, and relief grooves 83, 84, 85 for accommodating (receiving) the protruding adhesive 88, and the second substrate 90 has a contact surface 96 that contacts the contact surface 81. Preferably, the relief grooves 83, 84, 95 are formed adjacent to the contact surface 81. Also preferably, the relief grooves 83, 84, 85 are formed on the side surface (corner portion) of the recess 82. Also preferably, the relief portions 83, 84, 85 are formed at positions facing the adhesive groove portion 91.

[0020] As another configuration, as shown in FIG. 1(e), a relief groove 93 for accommodating an adhesive pool during position adjustment may be provided in part or the entire circumference of the outer peripheral portion of the second base material 92. As yet another configuration, as shown in FIG. 1(f), a relief groove 95 for accommodating an adhesive pool during position adjustment may be provided in part or the entire circumference of the contact surface 96 of the second base material 94. That is, the first base material 80 has a recess 82 into which the second base materials 92 and 94 are inserted and a contact surface 81 that contacts the second base materials 92 and 94. The second base materials 92 and 94 have a contact surface 96 that contacts the contact surface 81 and relief grooves 93 and 95 for accommodating (receiving) the protruding adhesive 88. Preferably, the relief grooves 93 and 95 are formed adjacent to the adhesive groove portion 91. Also preferably, the relief grooves 93 and 95 are formed at positions facing the adhesive groove portion 91. In this embodiment, the adhesive groove portion 91 may be provided on the contact surface 81 of the first base material 80 instead of the second base materials 90, 92, and 94.

[0021] (Second Embodiment) Next, with reference to FIG. 2, the optical device (LIDER) 300 in the second embodiment of the present invention will be described. LIDAR includes an illumination system that illuminates an object and a reception system that receives reflected light or scattered light from the object. In such LIDAR, there are a coaxial system in which the directions in which the illumination system and the reception system are directed coincide and a non-coaxial system in which the illumination system and the reception system are configured separately. FIG. 2 is a configuration diagram of the optical device 300 in this embodiment. The optical device 300 is a so-called coaxial LIDAR in which the optical axes of the illumination system and the reception system are aligned by the perforated mirror 4.

[0022] In FIG. 2, a light source forming unit (light projecting unit) 50 includes a semiconductor laser (light source) 1 that emits a laser beam 100, a lens 2 that shapes the beam shape of the laser beam 100 in a target area into a desired shape, and a diaphragm (fixed diaphragm) 3 that blocks unnecessary light of the laser beam 100. The laser beam 100 emitted from the light source forming unit 50 is projected through the aperture 3a of the diaphragm 3. Thereafter, the laser beam 100 passes through the hole 4a of the perforated mirror 4 fixedly held by the base lens barrel 51 and is reflected by the fixed mirror 5 fixedly held by the base lens barrel 51. Thereafter, the laser beam 100 is irradiated onto a target area (an object such as an obstacle 60) by a movable mirror 6 such as a MEMS (Micro Electro Mechanical System) mirror.

[0023] The movable mirror 6 fixedly held by the base lens barrel 51 is a biaxial drive mirror that rotates around the Y axis or the X axis perpendicular to the Y axis in FIG. 2. That is, the movable mirror 6 functions as a deflecting unit that deflects the laser beam 100 from the semiconductor laser 1 to scan an object and deflects the reflected light 101 from the object. The laser beam 100 irradiated onto the target area returns to the movable mirror 6 as the reflected light 101 from the obstacle 60. The reflected light 101 reflected by the movable mirror 6 is reflected by the fixed mirror 5 fixedly held by the base lens barrel 51, reflected by the reflecting surface 4b of the perforated mirror 4, and guided to a condenser lens 7 fixedly held by the base lens barrel 51. The reflected light 101 emitted from the condenser lens 7 is guided to a light receiving element 8. In this way, the perforated mirror 4 functions as a light guiding unit that guides the laser beam 100 from the semiconductor laser 1 to the movable mirror 6 and guides the reflected light 101 from the movable mirror 6 to the light receiving element 8.

[0024] The control unit 102 controls the semiconductor laser 1, the movable mirror 6, and the light receiving element 8. The control unit 102 drives the semiconductor laser 1 and the movable mirror 6 at predetermined drive voltages and drive frequencies, respectively, and measures the light reception waveform at a specific frequency when receiving light by the light receiving element 8. Then, the control unit 102 measures the difference between the light reception time obtained by the light receiving element 8 and the light emission time of the semiconductor laser 1, or the difference between the phase of the light reception signal obtained by the light receiving element 8 and the phase of the output signal of the semiconductor laser 1. The control unit 102 multiplies the difference by the speed of light to determine the distance to the object. In this way, the control unit 102 acquires the distance information of the object based on the output of the light receiving element 8.

[0025] Next, with reference to FIGS. 3 and 4, the structure of the light source forming unit 50 will be described. FIG. 3 is a cross-sectional view of the light source forming unit 50. FIG. 4 is an exploded perspective view of the light source forming unit 50.

[0026] In FIGS. 3 and 4, the lens holder (holding member) 11 holds the lens 2 and the aperture 3 that blocks unnecessary light of the laser beam 100. The lens 2 is fixedly held to the lens holder 11 with an adhesive 12. The semiconductor laser 1 is a light source in which a plurality of light emitting regions are stacked. The laser beam 100 emitted from the semiconductor laser 1 is emitted as a plurality of light beams in the direction in which the diameter of the light emitting region is small. The beam shape in the target region of the laser beam 100 is greatly related to the LIDAR performance, and the positional relationship between the semiconductor laser 1 and the lens 2 needs to be adjusted with an accuracy of several micrometers.

[0027] The direction of the distance between the semiconductor laser 1 and the lens 2 is defined as the Z-axis direction, and the directions of translation on the plane orthogonal to the Z-axis direction are defined as the X-axis direction and the Y-axis direction. The semiconductor laser 1 is fixedly held by an adhesive in an LD holder (light source holding member) 10 that holds the semiconductor laser 1. The adjustment ring (screw member) 13 is held in the Z-axis direction by screwing the screw portion 13a into the screw portion 11b of the lens holder 11, and the urging force of the urging spring (elastic member) 14 removes the play of the screw portion 13a in the Z-axis direction. Further, by fitting the diameter fitting portion 13b into the diameter fitting portion 11c of the lens holder 11, the position orthogonal to the Z-axis direction of the adjustment ring 13 and the lens 2 is determined. In this embodiment, the base material of the 2 corresponds to the LD holder 10 that holds the semiconductor laser 1, and the base material of the 1 corresponds to the adjustment ring that is screwed into the lens holder 11.

[0028] The distance in the Z-axis direction between the semiconductor laser 1 and the lens 2 is adjusted by rotating the adjustment ring 13 around the Z-axis. At this time, the flat portion 10a forming a plane orthogonal to the Z-axis of the LD holder 10 is urged against the flat portion 13c forming a plane orthogonal to the Z-axis of the adjustment ring 13 without play by the urging spring 14. The flat portion 13c orthogonal to the Z-axis of the adjustment ring 13 is disposed in the concave portion 13f of the adjustment ring 13. By bringing it into contact with the flat portion 10a forming a plane orthogonal to the Z-axis of the LD holder 10 inserted into the concave portion 13f, it contributes to the miniaturization of the entire light source forming portion 50 and the optical device 300. By adjusting the position in the Z-axis direction, the beam shape in the target region of the laser light 100 emitted from the semiconductor laser 1 can be adjusted (aligned) to a desired shape. After the position adjustment, an adhesive 16 is applied (disposed) to the adhesive groove portion 11d of the lens holder 11 and adhesively cured in a state urged by the urging spring 14, thereby fixing the distance in the Z-axis direction between the adjustment ring 13 and the lens holder 11.

[0029] Next, the positions of the semiconductor laser 1 and the lens 2 in the X-axis and Y-axis directions orthogonal to the Z-axis direction, as well as the angular position around the Z-axis, are adjusted by moving the LD holder 10 with respect to the lens holder 11. The flat portion 10a of the LD holder 10 is urged against the flat portion 13c of the adjustment ring 13 by the biasing spring 14 without play, and can be adjusted in the X-axis direction, Y-axis direction, and around the Z-axis while maintaining the position of the LD holder 10 in the Z-axis direction. By adjusting the positions in the X-axis and Y-axis directions and the angular position around the Z-axis, the beam in the target area of the laser light 100 emitted from the semiconductor laser 1 can be adjusted to an appropriate position.

[0030] A flat portion (concave surface) that is one step lower is provided on the flat portion 10a of the LD holder 10. 1 0b is provided, and a thermosetting adhesive 15 is filled between the flat portion 10a of the LD holder 10 and the flat portion 13c of the adjustment ring 13. A relief groove 13d is provided at the corner of the concave portion 13f of the adjustment ring 13. Thereby, when adjusting the positions in the X-axis and Y-axis directions and the angle around the Z-axis, it is possible to prevent the thermosetting adhesive 15 protruding from the flat portion 10b from flowing into the gap 13e between the LD holder 10 and the adjustment ring 13. Instead of this, it is also conceivable to adjust the amount of the adhesive applied so that the thermosetting adhesive 15 does not protrude from the flat portion 10b when adjusting the positions in the X-axis and Y-axis directions and the angle around the Z-axis. However, in order to prevent the thermosetting adhesive 15 from protruding from the flat portion 10b, it is necessary to optimize the adhesive application amount while checking the variation in the volume of the flat portion 10b due to individual differences in parts for each part, which may reduce productivity.

[0031] After the positions of the LD holder 10 in the X-axis and Y-axis directions and the angle around the Z-axis are determined, the thermosetting adhesive 15 is cured by heating. As a result, by fixing the LD holder 10 to the adjustment ring 13, the positional relationship between the semiconductor laser 1 and the lens 2 is fixedly held. At this time, since the positional relationship between the LD holder 10 and the adjustment ring 13 in the Z-axis direction is determined by the abutment between the flat portion 10a and the flat portion 13c, it is not affected by the curing shrinkage of the thermosetting adhesive 15. In addition, due to the urging force caused by the curing shrinkage of the urging spring 14 and the thermosetting adhesive 15, a frictional force is generated between the flat portion 10a of the LD holder 10 and the flat portion 13c of the adjustment ring 13. Therefore, the positions in the X-axis direction, Y-axis direction, and around the Z-axis can also be fixed without deviation.

[0032] The light source forming unit 50 with the positional relationship between the semiconductor laser 1 and the lens 2 adjusted and fixed is adjusted in the X-axis and Y-axis directions with respect to the base lens barrel 51 so as to fit into the target area of the movable mirror 6 attached to the base lens barrel 51, and is adhesively fixed after adjustment. The positional relationship between the light source forming unit 50 and the base lens barrel 51 is sufficient with an adjustment accuracy in units of several tens of μm.

[0033] As described above, according to the present embodiment, the positional relationships between the semiconductor laser 1 and the lens 2 in the X-axis, Y-axis, Z-axis directions, and around the Z-axis can be adjusted with high precision. That is, regarding the Z-axis direction, it is adjusted by the adjustment ring 13 screwed to the lens holder 11 with a screw structure, and regarding the positions in the X-axis and Y-axis directions and the angular position around the Z-axis, it is adjusted by the movement on the plane where the flat portion 13c of the adjustment ring 13 and the flat portion 10a of the LD holder 10 are abutted. In this way, by adopting a structure that is not affected by the curing shrinkage of the adhesive, a high-precision relative positional relationship can be maintained even when fixed and held by the adhesive.

[0034] In the present embodiment, a coaxial LIDAR is described as an example, but it is not limited thereto. Each embodiment is applicable to non-coaxial LIDARs and optical devices such as laser irradiation devices other than LIDARs.

[0035] (Third Embodiment) Next, with reference to FIGS. 5 to 7, the in-vehicle system (driving support device) 1000 in the third embodiment of the present invention will be described. The in-vehicle system 1000 includes the optical device (LIDER) 300 of the second embodiment.

[0036] FIG. 5 is a block diagram of the in-vehicle system 1000. The in-vehicle system 1000 is held by a movable body (mobile device) such as an automobile (vehicle), and based on the distance information of objects such as obstacles and pedestrians around the vehicle acquired by the optical device 300, it is a system for assisting the driving (operation) of the vehicle. FIG. 6 is a schematic diagram of the vehicle 500 as a mobile device including the in-vehicle system 1000. In FIG. 6, the case where the distance measurement range (detection range) of the optical device 300 is set in front of the vehicle 500 is shown, but the distance measurement range may be set behind or on the side of the vehicle 500.

[0037] As shown in FIG. 5, the in-vehicle system 1000 includes an optical device 300, a vehicle information acquisition device 200, a control device (control unit, ECU: electronic control unit) 350, and a warning device (warning unit) 400. The optical device 300 includes a control unit 102 (see FIG. 2) having functions as a distance acquisition unit (acquisition unit) and a collision determination unit (determination unit). However, if necessary, in the in-vehicle system 1000, a distance acquisition unit or a collision determination unit separate from the control unit 102 may be provided, and each may be provided outside the optical device 300 (for example, inside the vehicle 500). Alternatively, at least a part of the functions of the control unit 102 may be possessed by the control device 350.

[0038] FIG. 7 is a flowchart showing an operation example of the in-vehicle system 1000. Hereinafter, the operation of the in-vehicle system 1000 will be described according to this flowchart.

[0039] First, in step S1, the light source forming unit (light source unit) 50 of the optical device 300 illuminates an object around the vehicle, and based on the signal output by the light receiving element 8 by receiving the reflected light from the object, the control unit 102 acquires the distance information of the object. Also, in step S2, the vehicle information acquisition device 200 acquires vehicle information including the vehicle speed, yaw rate, steering angle, etc. of the vehicle. Then, in step S3, the control unit 102 determines whether the distance to the object is within a preset distance range using the distance information acquired in step S1 and the vehicle information acquired in step S2.

[0040] Thereby, it can be determined whether an object exists within the set distance around the vehicle, and the possibility of collision between the vehicle and the object can be determined. Note that steps S1 and S2 may be performed in the reverse order of the above, or may be processed in parallel with each other. The control unit 102 determines "possibility of collision" when an object exists within the set distance (step S4), and determines "no possibility of collision" when no object exists within the set distance (step S5).

[0041] Next, when the control unit 102 determines "possibility of collision", it notifies (transmits) the determination result to the control device 350 and the warning device 400. At this time, the control device 350 controls the vehicle based on the determination result of the control unit 102 (step S6), and the warning device 400 warns the user (driver, passenger) of the vehicle based on the determination result of the control unit 102 (step S7). Note that the notification of the determination result may be made to at least one of the control device 350 and the warning device 400.

[0042] The control device 350 can control the movement of the vehicle by outputting a control signal to the drive unit (such as an engine or a motor) of the vehicle. For example, it performs controls such as generating a control signal to apply brakes, release the accelerator, turn the steering wheel, or generate braking force on each wheel to suppress the output of the engine or the motor. Also, the warning device 400 gives warnings to the user, such as emitting a warning sound, displaying warning information on the screen of a car navigation system, or vibrating the seat belt or the steering wheel.

[0043] As described above, according to the in-vehicle system 1000, detection and distance measurement of an object can be performed by the above-described processing, and it becomes possible to avoid a collision between the vehicle and the object. In particular, by applying the optical device 300 to the in-vehicle system 1000, high distance measurement accuracy can be achieved, so that detection of the object and collision determination can be performed with high accuracy.

[0044] In this embodiment, the in-vehicle system 1000 is applied to driving support (collision damage reduction), but it is not limited thereto, and the in-vehicle system 1000 may be applied to cruise control (including the function of following the entire vehicle speed) or automatic driving. Also, the in-vehicle system 1000 is not limited to vehicles such as automobiles, and can be applied to moving bodies such as ships, airplanes, and industrial robots. Further, not limited to moving bodies, it can be applied to various devices that utilize object recognition such as advanced road traffic systems (ITS) and monitoring systems.

[0045] Also, the in-vehicle system 1000 and the vehicle 500 may be provided with a notification device (notification unit) for notifying the manufacturer (maker) of the in-vehicle system 1000, the dealer of the vehicle 500, etc. in the event that the vehicle 500 collides with an obstacle. For example, as the notification device, one that transmits information regarding the collision between the vehicle 500 and the obstacle (collision information) to a preset external notification destination by e-mail or the like can be adopted.

[0046] By adopting such a configuration that the collision information is automatically notified by the notification device, it is possible to promptly take measures such as inspection and repair after a collision occurs. Note that the notification destination of the collision information may be an insurance company, a medical institution, a police station, etc., or any arbitrary one set by the user. Further, not limited to the collision information, the notification device may be configured to notify the notification destination of the failure information of each part and the consumption information of consumables. Regarding the detection of the presence or absence of a collision, it may be performed using the distance information acquired based on the output from the aforementioned light receiving element 8, or may be performed by another detection unit (sensor).

[0047] According to each embodiment, by providing a relief groove at the corner of the recess of the first base material, it is possible to prevent the adhesive that has protruded from the adhesive groove during the relative position adjustment of the first base material and the second base material from flowing into the gaps for adjustment in the X direction and Y direction of both base materials. As a result, it is possible to suppress the occurrence of positional deviation with respect to the positions of both base materials adjusted with high precision during the process of shrinkage and curing of the adhesive, and it becomes possible to perform relative positioning with high accuracy. Therefore, according to each embodiment, it is possible to provide an optical device, an in-vehicle device, a mobile device, and a method for manufacturing an optical device that are positioned with high precision.

[0048] As described above, the preferred embodiments of the present invention have been described, but the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist thereof.

Explanation of Reference Numerals

[0049] 80 First base material 81 Contact surface (first contact portion) 82 Recess (first recess) 88 Adhesive 90, 92, 94 Second base material 96 Contact surface (second contact portion) 83, 84, 85, 93, 95 Relief groove (groove portion) 800 Optical device

Claims

1. A first substrate and a second substrate, an optical member held on at least one of the first and second substrates, and an adhesive that bonds the first and second substrates to each other, and has: on the first substrate, a first recess into which the second substrate is inserted, a first contact portion that contacts the second substrate, and a groove portion into which a part of the adhesive enters are provided; on the second substrate, a second contact portion that contacts the first contact portion is provided; on at least one of the first and second substrates, a second recess in which the adhesive is disposed so as to bond the first and second substrates to each other is provided; a gap is provided between the first and second substrates in a direction perpendicular to the contact direction of the first and second contact portions; The optical device is characterized in that the groove portion is provided between the second recess and the gap.

2. The optical device according to claim 1, wherein the groove portion is adjacent to the first contact portion.

3. The optical device according to claim 1 or 2, wherein the groove portion is provided on a side surface or a bottom surface of the first recess.

4. A first substrate and a second substrate, an optical member held on at least one of the first and second substrates, and an adhesive that bonds the first and second substrates to each other, and has: on the first substrate, a first recess into which the second substrate is inserted and a first contact portion that contacts the second substrate are provided; on the second substrate, a second contact portion that contacts the first contact portion and a groove portion into which a part of the adhesive enters are provided; on at least one of the first and second substrates, a second recess in which the adhesive is disposed so as to bond the first and second substrates to each other is provided; a gap is provided between the first and second substrates in a direction perpendicular to the contact direction of the first and second contact portions; The optical device is characterized in that the groove portion is provided between the second recess and the gap.

5. The optical device according to claim 4, wherein the groove portion is adjacent to the second contact portion.

6. The optical device according to any one of claims 1 to 5, wherein the groove portion faces the second recess.

7. The optical device according to any one of claims 1 to 6, wherein the adhesive is a thermosetting adhesive.

8. The optical device according to any one of claims 1 to 7, comprising a light source held by the second base material, wherein the optical member held by the first base material is a lens that transmits the light emitted from the light source.

9. The first base material is a screw member that fits into a holding member that holds the optical member, The optical device according to any one of claims 1 to 8, wherein the distance in the contact direction between the first base material and the holding member is adjusted by rotating the screw member around the contact direction.

10. The optical device according to any one of claims 1 to 9, further comprising a deflection unit that deflects light from a light source to scan an object and deflects reflected light from the object.

11. The optical device according to claim 10, further comprising a light guide unit that guides the light from the light source to the deflection unit and guides the reflected light from the deflection unit to a light receiving element.

12. The optical device according to claim 11, comprising a control unit that acquires distance information of the object based on an output of the light receiving element.

13. An in-vehicle system comprising the optical device according to any one of claims 11 or 12, and determining a possibility of collision between the vehicle and the object based on the distance information of the object obtained by the optical device.

14. The in-vehicle system according to claim 13, comprising a control device that outputs a control signal for generating a braking force to the vehicle when it is determined that there is a possibility of collision between the vehicle and the object.

15. The in-vehicle system according to claim 13 or 14, comprising a warning device that warns a user of the vehicle when it is determined that there is a possibility of collision between the vehicle and the object.

16. A moving device comprising the optical device according to claim 11 or 12, and being movable while holding the optical device.

17. The moving device according to claim 16, comprising a determination unit that determines a possibility of collision with the object based on the distance information of the object obtained by the optical device.

18. A method for manufacturing an optical device having first and second base materials and an optical member held by at least one of the first and second base materials, A coating step of applying an adhesive to the second base material, An insertion step of inserting the second substrate into the first concave portion provided in the first substrate; An adjustment step of adjusting the relative positions of the first and second substrates; A curing step of curing the adhesive, and having, In the coating step, the adhesive is applied to a second concave portion provided in the second substrate, In the insertion step, the second substrate is inserted into the first concave portion of the first substrate so as to provide a gap for adjusting the relative position in a direction perpendicular to the contact direction between a first contact portion of the first substrate that contacts the second substrate and a second contact portion of the second substrate that contacts the first contact portion, In the adjustment step, when adjusting the relative position in the direction perpendicular to the contact direction and in the direction around the contact direction, a part of the adhesive enters a groove portion provided between the second concave portion and the gap. A manufacturing method characterized by this.

19. The manufacturing method according to claim 18, wherein in the curing step, the adhesive is cured by heating.

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