WO2007037226A1

WO2007037226A1 - Device having imaging element and imaging device using the same

Info

Publication number: WO2007037226A1
Application number: PCT/JP2006/319052
Authority: WO
Inventors: Shokichi Takahashi; Jouji Wada
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2005-09-29
Filing date: 2006-09-26
Publication date: 2007-04-05
Also published as: JP4654862B2; JP2007096830A; CN101208946A; CN100539646C

Abstract

An imaging element having an imaging plane through which an optical axis passes is mounted on a device having imaging element. The device having imaging element includes a mounting table on which a first concave portion is formed, a spherical body in abutment with the first concave portion of the mounting table, and a base table having a second concave portion with which the spherical body is in abutment. An imaging element is mounted on the mounting table. The spherical body has a center positioned on the optical axis. The device having imaging element can smoothly adjust the tilt angle.

Description

Image sensor mounting apparatus and imaging apparatus using the same

Technical field

The present invention relates to an image sensor mounting device that can adjust a tilt angle of an image sensor, and a photographing device such as a surveillance camera device, a video camera device, and a digital still camera device using the image sensor mounting device.

Background art

[0002] In an imaging device having an image sensor such as a CCD or CMOS, generally, the imaging surface of the image sensor is orthogonal to the optical axis of the lens, that is, the normal of the imaging surface matches the optical axis. Desirable to take sharp images! //.

[0003] When mounting an image sensor, the normal of the imaging surface and the optical axis are not completely matched due to variations in component dimensions, assembly variations, and the like. There is a non-zero angle (tilt angle) between. This tilt angle can cause partial blurring of the image captured by the image sensor, which can have a significant adverse effect on image quality.

[0004] Japanese Unexamined Patent Application Publication No. 2005-117253 discloses a conventional imaging device for solving such a problem. The imaging apparatus includes a mount for supporting the imaging device, a steel ball fixed to the rear lens barrel, and an adjustment screw disposed in a direction perpendicular to the optical axis between the mount and the rear lens barrel. . By changing the screwing degree of the adjusting screw, the angle of the mount relative to the rear barrel is changed using the steel ball as a fulcrum, and the tilt of the image sensor is corrected.

[0005] In this image pickup apparatus, the center of the image pickup surface of the image pickup device and the position where the steel ball serving as a tilt adjustment fulcrum is arranged are separated. Therefore, when the tilt adjustment of the image sensor is performed, the center of the imaging surface and the optical axis may be greatly shifted, which may adversely affect the image.

[0006] Japanese Laid-Open Patent Publication No. 8-248465 discloses another conventional imaging device for solving the above-mentioned problems. The imaging apparatus includes a movable plate that fixes the imaging element, a fixed plate that holds the movable plate by a protrusion, and an adjustment screw that adjusts the vertical tilt angle and the vertical tilt angle that engages the movable plate and the fixed plate. With. By rotating the adjustment screw, the vertical and horizontal tilt angles of the image sensor can be adjusted. In this imaging apparatus, the movable plate to which the imaging element is fixed and the fixed plate for holding the movable plate are held by the protrusions that are in contact with the concave portions provided in the movable portion. Therefore, when the tilt adjustment of the image pickup apparatus is performed, the position where the protrusion and the recess contact may be displaced. If this position shifts, the tilt angle cannot be adjusted smoothly, and it is difficult to accurately adjust the tilt angle.

Disclosure of the invention

[0008] The image pickup device mounting apparatus mounts an image pickup device having an image pickup surface through which an optical axis passes. The image pickup device mounting apparatus includes a mounting base in which a first recess is formed, a sphere in contact with the first recess in the mounting base, and a base in which a second recess in contact with the sphere is formed. An image sensor is mounted on the mounting base. The sphere has a center located on the optical axis.

[0009] This image sensor mounting device can adjust the tilt angle smoothly.

Brief Description of Drawings

[0010] FIG. 1A is a perspective view of an image sensor mounting device according to an embodiment of the present invention.

FIG. 1B is a perspective view of an image sensor mounting device according to the embodiment.

[FIG. 1C] FIG. 1C is a schematic diagram of a photographing apparatus according to an embodiment.

FIG. 2A is an exploded perspective view of the image sensor mounting device according to the embodiment.

FIG. 2B is an exploded perspective view of the image sensor mounting device according to the embodiment.

FIG. 3A is an exploded perspective view of a filter movable portion of the image sensor mounting device in the embodiment.

FIG. 3B is an exploded perspective view of the filter movable part of the image sensor mounting device in the embodiment.

FIG. 4 is an exploded perspective view of an image sensor holding unit of the image sensor mounting apparatus according to the embodiment.

FIG. 5A is an exploded perspective view of the mounting base and base of the image sensor holding unit in the embodiment.

FIG. 5B is an exploded perspective view of the mounting base and base of the image sensor holding unit in the embodiment.

[FIG. 6A] FIG. 6A is a cross-sectional view of a principal part of the image sensor mounting device in the embodiment. FIG. 6B is a cross-sectional view of main parts of the image sensor mounting device according to the embodiment.

FIG. 7A is a cross-sectional view of a principal part of the image sensor mounting device according to the embodiment.

FIG. 7B is a cross-sectional view of main parts of the image sensor mounting device according to the embodiment.

FIG. 8A is a cross-sectional view of a principal part of the image sensor mounting device according to the embodiment.

FIG. 8B is a cross-sectional view of a principal part of the image sensor mounting device in the embodiment.

FIG. 9A is a cross-sectional view of main parts of the image sensor mounting device according to the embodiment.

FIG. 9B is a cross-sectional view of main parts of the image sensor mounting device according to the embodiment.

FIG. 10A is a cross-sectional view of main parts of another image sensor holding unit in the embodiment.

FIG. 10B is a cross-sectional view of main parts of another image sensor holding unit in the embodiment. Explanation of symbols

1 Image sensor mounting device

50 base

51 Slotted hole

53 Base recess (second recess)

54 depression

60 on board

64 Recess of mounting base (first recess)

100 Image sensor

100A imaging surface

110 sphere

200 Adjustment screw

200A skull

200B shaft

200C thread groove

201 Curved surface

210 Retaining screw

211 Elastic part

300 Spherical surface 501A Optical axis

502 Video signal processor

1001 Camera

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1A and FIG. 1B are perspective views of an image sensor mounting device 1 in an embodiment of the present invention. FIG. 1C is a schematic diagram of an imaging device 1001 in the embodiment.

As shown in FIG. 1C, an imaging device 1001 is connected to an imaging device 100 such as a CCD or CMOS, an imaging device mounting device 1 on which the imaging device 100 is mounted, a lens unit 501 and an imaging device 100. A video signal processing unit 502. The imaging element mounting apparatus 1 includes an imaging element holding unit 10 having a mounting surface 10A on which the imaging element 100 is mounted. A video signal processing unit 502 processes a signal output from the image sensor 100 and outputs a video signal. The imaging element 100 has an imaging surface 100A on which an image is reflected. The normal line 100B extends in a direction perpendicular to the imaging surface 100A.

[0014] For the sake of explanation, in the embodiment, the X axis, the Y axis, and the Z axis perpendicular to each other are shown as directions common to all drawings. The Z-axis direction is the direction of the optical axis 501A of the lens unit 501, and the Y-axis direction and the X-axis direction are each perpendicular to the Z-axis direction.

In imaging device 1001, in general, imaging surface 100A of imaging device 100 is orthogonal to optical axis 501A of lens unit 5001, that is, normal line 100B of imaging surface 100A is optical axis 501A. Desirable to shoot for sharp images to match! / ,.

[0016] When mounting the image sensor 100, the normal line 100B of the imaging surface 100A and the optical axis 501A are not completely matched due to variations in component dimensions and assembly, etc. There may be a non-zero angle Θ (tilt angle Θ) between line 100B and optical axis 501A. The tilt angle Θ may cause partial blurring of the image captured by the image sensor 100, and may greatly affect the image quality.

As shown in FIG. 1A and FIG. 1B, the image sensor mounting device 1 includes a filter movable unit 20 that holds an infrared light cut filter movably. The image sensor holding unit 10 holds the image sensor 100 so as to be movable in the Z-axis direction. The end 10B of the image sensor holding unit 10 holding the image sensor 100 is held by the guide rail unit 40 so as to be movable in the Z-axis direction. The end 10C of the image sensor holding unit 10 is moved in the Z-axis direction (optical axis 501A direction) by the motor unit 30. To do. In FIG. 1A, the guide rail portion 40 is attached to the image sensor mounting apparatus 1. In FIG. 1B, the guide rail portion 40 is removed from the imaging device mounting apparatus 1. The imaging element holding unit 10 includes a base 50 held by the motor part 30 and the guide rail part 40, and a mounting base 60 attached to the base 50. The mounting base 60 is attached to the base 50 with two adjustment screws 200 and two holding screws 210, and the tilt angle of the image sensor 100 can be adjusted. As described above, the image sensor mounting apparatus 1 can move the image sensor 100 along the optical axis 501A and adjust the tilt angle of the image sensor 100.

[0018] The configuration of the imaging element mounting apparatus 1 will be described in detail. 2A and 2B are exploded perspective views of the image sensor mounting device 1. FIG.

The imaging element mounting apparatus 1 includes a mounting base 60 that holds the imaging element 100 and a base 50 to which the mounting base 60 is attached. The end 50A of the base 50 is held by the image sensor moving shaft 71 extending in the Z-axis direction by the two moving shaft engaging portions 56 and moves in the Z-axis direction by the rotation of the rotary motor 31 of the motor unit 30. The end 50B of the base 50 is held by a guide rail engaging portion 55 on a rail 43 provided in the guide rail portion 40 and extending in the Z-axis direction, and can move in the Z-axis direction. Therefore, the base 50 is moved in the Z-axis direction while maintaining its orientation by the rotation of the rotary motor 31. The image sensor 100 is attached to the mounting base 60, and the mounting base 60 is attached to the base 50. Therefore, the image sensor 100 can move in the Z-axis direction while maintaining the direction of the image pickup surface 100A of the image sensor 100, that is, the direction of the normal 100B.

As shown in FIGS. 2A and 2B, the image sensor moving shaft 71 is attached to the filter movable unit 20 by two pressing plates 72. An end 43A of the rail 43 of the guide rail portion 40 is held by a boss 203 provided in the filter movable portion 20, and an end 43B is held by a boss 202 provided inside the housing portion 41.

The guide rail portion 40 includes a housing portion 41 that accommodates the rail 43, and a photosensor portion 42 that is mounted on the bottom surface of the housing portion 41. The photo sensor unit 42 detects the position in the Z-axis direction of the image sensor 100 held by the image sensor holding unit 10.

As shown in FIG. 2B, the imaging device mounting apparatus 1 includes a filter movable unit 20. Filterable The moving unit 20 can attach and detach a filter such as an infrared light cut filter on the optical axis 501A with the filter motor 21.

As shown in FIGS. 2A and 2B, the imaging device mounting apparatus 1 includes a motor unit 30 having a rotary motor 31, a shaft 32 of the rotary motor 31, and a bearing unit 33 that holds the shaft 32. Prepare. The shaft 32 of the rotary motor 31 is threaded to form a thread groove 32A. The screw groove 32A of the shaft 32 is rotated by the rotation of the rotary motor 31, and the image sensor holding unit 10 can move in the Z-axis direction (the direction of the optical axis 501A) along with the rotation.

FIGS. 3A and 3B are exploded perspective views of the filter movable unit 20 of the image sensor mounting device 1. The filter movable unit 20 includes a holding unit 24 and a holding unit 220. The filter frame unit 25, the filter motor 21 that is pressed against the holding unit 24 by the holding unit 220, the filter motor 21, and the filter moving shaft. 22, a shaft holding portion 23, a filter holding portion 26, a filter holding shaft 28, and a shaft holding portion 27. Two window portions 25A and 25B are formed in the filter frame portion 25, and a filter 25E such as an infrared light cut filter can be mounted on the window portion 25B. The filter motor 21 moves the filter frame 25 in the Y-axis direction. A filter moving shaft 22 is attached to the filter motor 21. The shaft holder 23 holds the filter moving shaft 22. A filter holding portion 26 for attaching the filter frame portion 25 to the filter moving shaft 22 is provided at the end 25C of the filter frame portion 25. A filter holding shaft 28 is inserted into an end 25D opposite to the end 25C of the filter frame 25, and a shaft holding portion 27 is provided so that the filter frame 25 can move along the filter holding shaft 28. /!

[0025] When the filter motor 21 is rotated, the filter frame 25 moves in the Y-axis direction along the filter holding shaft 28, and the optical axis 501A can be selectively passed through the windows 25A and 25B of the filter frame 25. it can. Therefore, the filter 25E mounted on the window 25B can be attached to and detached from the optical axis 501A. The filter 25E may be mounted on the window portion 25A.

FIG. 4 is an exploded perspective view of the image sensor holding unit 10 of the image sensor mounting apparatus 1 according to the embodiment that holds the image sensor 100. The image sensor holding part 10 includes a heat sink 91, an insulating part 92, a substrate part 93 on which the image sensor 100 is mounted through the heat sink 91 and the insulating part 92, a mounting base 60, a base 50, and a base 50. It has a sphere 110 arranged between the mounting base 60. A board part 93 is attached to the mounting table 60. Base 50 is shown in Figures 2A and 2B. It is held along the image sensor moving shaft 71 and the rail 43 and is movable in the Z-axis direction.

Two moving shaft engaging portions 56 are provided at the end 50 A of the base 50 of the image sensor holding unit 10. Between the two moving shaft engaging portions 56, a holding member 120 sandwiched between the two washer portions 121 is provided. The holding member 120 has a ratchet stop 126 and is urged in one direction by a spring 123. A claw portion 125 is attached to the holding member 120 by a pressing plate 124. The claw portion 125 is engaged with the thread groove 32A of the shaft 32 of the rotary motor 31 shown in FIG. 2B. When the shaft 32 rotates while the claw portion 125 and the screw groove 32A are engaged with each other, the claw portion 125 moves in the Z-axis direction, thereby moving the holding member 120 and the base 50 in the Z-axis direction. To do. That is, the image sensor holding unit 10 can move in the direction of the optical axis 501A, which is the Z-axis direction, by the rotation of the rotary motor 31. An end 50B of the base 50 is provided with a guide rail engaging portion 55 for moving in the Z-axis direction along the rail 43 of the guide rail portion 40 shown in FIG. 2A. The two moving shaft engaging portions 56 provided on the base 50 prevent the base 50 from rattling and prevent the base 50 from changing its direction with respect to the Z-axis direction. The base 50 has a surface 50C facing the mounting base 60 and a surface 50D opposite to the surface 50C.

[0028] As shown in FIG. 4, the surface 50C of the base 50 is provided with a recess 54 having a bottom 54A, and the bottom 54A of the recess 54 facing the mounting base 60 is provided with a recess 53. . The recess 53 has a conical taper extending from the surface 50D toward the bottom 54A of the recess 54, that is, toward the surface 50C, and the sphere 110 is disposed in the recess 53. Yes. The base 50 is formed with two elongated holes 51 and two elongated holes 251 penetrating from the surface 50C to the surface 50D with the recess 53 as the center. The concave portion 53 and the long holes 51 and 251 are arranged on the straight line L1 so that the concave portion 53 is positioned between the long hole 51 and the long hole 251. The long holes 51 and 251 have the same longitudinal direction as the direction connecting the recess 53 and the long hole 51 in the direction of the straight line L1. The long hole 51 has two inner surfaces 52 parallel to the straight line L1, that is, the longitudinal direction of the long hole 51. The distance between the two inner surfaces 52 increases in the direction from the surface 50D toward the surface 50C. In other words, the distance between the two inner surfaces 52 widens in the direction of force from the mounting base 60 to the base 50. The adjustment screw 200 is inserted into each of the two long holes 51, and the holding screw 210 is inserted into each of the two long holes 251. The base 50, the mounting base 60, and the sphere 110 are made up of the image sensor 100 shown in FIG. The tilt adjustment unit 90 that can adjust the tilt angle Θ is configured.

[0029] The tilt adjustment unit 90 of the imaging device mounting apparatus 1 according to the embodiment will be described in detail.

FIGS. 5 and 5 are exploded perspective views of the tilt adjustment unit 90. FIG.

The mounting table 60 has a surface 60 mm facing the base 50 and a surface 60 mm opposite to the surface 60 mm.

A column part 63 is also provided that also projects the center partial force of the surface 60 of the mounting table 60. The column part 63 has a surface 63 mm facing the base 50. A concave portion 64 having a conical taper extending in the direction 60C from the surface 60Β to the surface 60Α, that is, the direction 60C from the surface 60Β to the surface 63Α is formed on the surface 63Α of the column portion 63. The spherical body 110 is sandwiched between the concave portion 53 of the base 50 and the concave portion 64 of the mounting base 60 and is rotatably held. Four bosses 61 are provided on the surface 60 mm of the mounting base 60. With the boss 61, as shown in FIG. 4, the substrate 503 on which the video signal processing unit 502 is mounted is attached to the mounting table 60 so as to face the surface 60mm. On the surface 60 mm of the mounting table 60, a boss 62 that projects a force of 60 mm is provided. A heat sink 91 is attached to the boss 62.

[0031] Since the recesses 53 and 64 have a conical shape, spheres having various diameters can be used as the sphere 110, and the sphere 110 can be accurately positioned.

[0032] The mounting base 60 is formed with four screw holes 66 having threaded inner surfaces that pass through the surface 60Α to the surface 60Β. The adjustment screw 200 is attached to the screw hole 66 of the mounting base 60 through the long hole 51 from the surface 50D of the base 50. The holding screw 210 is attached to the screw hole 66 of the mounting base 60 through the elongated hole 251 from the surface 50D of the base 50 via the elastic portion 211. In the embodiment, for example, a helical spring can be used as the elastic portion 211. The adjusting screw 200 has a head rod 200Α and a shaft rod 200Β extending from the head rod 200Α, and the shaft rod 200Β has a screw groove portion 200C having a screw groove. The adjusting screw 200 has a curved surface portion 201 having a spherical surface 201A which is a curved surface protruding in the direction of the direction of force from the head portion 200Α to the shaft portion 200Β.

FIG. 6B is a cross-sectional view of the tilt adjustment unit 90 of the image sensor mounting device 1 shown in FIG. FIG. 6B is a cross-sectional view taken along line 6-6 of the tilt adjustment unit 90 shown in FIG. 6B.

[0034] As shown in FIG. 6B, in the tilt adjustment unit 90, the base 50 is provided with an adjustment screw 200 and a holding screw. It is attached to the mount 60 by 210. Between the concave portion 53 of the mounting base 60 and the concave portion 64 of the base 50, a spherical body 110 that is in contact with the concave portions 53 and 64 is disposed in a rotatable state. By turning the adjusting screw 200 to adjust the distance T 1 between the surface 60A of the mounting base 60 and the head 200A of the adjusting screw 200, the mounting base 60 is centered on the center 110A of the sphere 110 with respect to the base 50. Rotate in the X-axis direction. The concave portion 64 of the mounting base 60 and the concave portion 53 of the base 50 have a conical taper and hold the sphere 110 in a slippery state. The center 110A of the sphere 110 is located on the optical axis 501A as shown in FIG.

[0035] The longitudinal direction of the long hole 51 is parallel to the Y-axis. As shown in FIG. 6B, the distance between the two inner side surfaces 52 parallel to the longitudinal direction of the long hole 51 is widened in the direction from the surface 50C toward the surface 50D. The spherical surface 201A of the curved surface portion 201 of the head 200A of the adjustment screw 200 contacts the inner surface 52 of the long hole 51. In this state, as shown in FIG. 6A, the adjusting screw 200 is not in contact with the inner side surface 51 A that intersects the longitudinal direction of the long hole 51. As shown in FIG. 6A, the holding screw 210 has a head 210A and a shaft 210B extending from the head 210A, and the shaft 210B has a screw groove 210C having a screw groove. The holding screw 210 is inserted into the surface 50D force slot 251 of the base 50, and the screw groove 210C is inserted into the screw hole 66 of the mounting base 60 and fixed. Between the head 210A of the holding screw 210 and the base 50, an elastic portion 211 (a helical spring) is disposed.

A method of adjusting the tilt angle Θ of rotation about the X axis of the image sensor 100 by the tilt adjustment unit 90 will be described. 7A and 7B are cross-sectional views of the tilt adjusting unit 90 of the image sensor mounting device 1 shown in FIG. 1B taken along line 6A-6A.

[0037] As shown in FIG. 7A, when the adjustment screw 200 is rotated in the direction D1 to be tightened in the screw hole 66 of the mounting base 60, the head 200A of the adjustment screw 200 approaches the mounting base 60. Accordingly, the portion 50E passing through the long hole 51 from the recess 53 of the base 50 and the portion 60D passing through the screw hole 66 from the recess 64 of the mounting base 60 approach each other. Since the direction facing the surfaces 50C and 50D of the base 50 is maintained, the mounting base 60 rotates at the center 110A of the sphere 110 in the direction D11 around the X axis, and the part 60D of the mounting base 60 is the base. Approaches stand 50. Accordingly, the portion 50F passing through the elongated hole 251 from the recess 53 of the base 50 and the portion 60E passing through the screw hole 66 from the recess 64 of the mounting base 60 are separated from each other. Thus, the direction in which the surface 60B of the mounting base 60 with respect to the base 50 faces is centered around the X-axis direction. Can be rotated.

[0038] As shown in FIG. 7B, when the adjustment screw 200 is rotated in the direction D2 to loosen from the screw hole 66 of the mounting base 60, the elastic part 211 moves the base 50 part 50F and the mounting base 60 part 60E together. The head 200A of the adjusting screw 200 moves away from the mounting base 60. Accordingly, the portion 60D passing through the screw hole 66 from the concave portion 64 of the mounting base 60 is separated from the portion 50E passing through the long hole 51 from the concave portion 53 of the base 50. Since the direction facing the surfaces 50C and 50D of the base 50 is maintained, the mounting base 60 rotates at the center 110A of the sphere 110 in the direction D12 around the X axis, and the part 60D of the mounting base 60 becomes the base 50. Get away from. Accordingly, the portion 50F that passes through the elongated hole 251 from the recess 53 of the base 50 and the portion 60E that passes through the screw hole 66 from the recess 64 of the mounting base 60 approach each other. In this manner, the direction in which the surface 60B of the mounting table 60 faces the base 50 can be rotated about the X-axis direction.

[0039] Note that even if the mounting base 60 rotates in the directions Dll and D12 about the X axis, the adjustment screw 200 and the holding screw 210 are perpendicular to the surface 60A of the mounting base 60. Since the adjusting screw 200 and the holding screw 210 are respectively inserted into the long holes 51 and 251 having the longitudinal direction in the Y-axis direction, the adjusting screw 200 and the holding screw 210 are in contact with the surfaces 50C and 50D of the base 50. The angle can be changed. Further, since the spherical surface 201A force of the curved surface portion 201 of the adjusting screw 200 abuts against the two inner surfaces 52 parallel to the longitudinal direction of the long hole 51, it is stable regardless of variations in the diameter of the curved surface portion 201 of the adjusting screw 200. The angle can be adjusted.

Next, a method of adjusting the tilt angle Θ of rotation about the Y axis of the image sensor 100 by the tilt adjustment unit 90 will be described. FIG. 8A is a cross-sectional view taken along line 8A-8A of the tilt adjustment unit 90 of the imaging device mounting apparatus 1 shown in FIG. 1B. FIG. 8B is a cross-sectional view taken along line 8B-8B of the tilt adjusting section 90 shown in FIG. 8A.

As shown in FIG. 8A, in the tilt adjustment unit 90, the base 50 is attached to the mounting base 60 by the adjustment screw 200 and the holding screw 210. Between the concave portion 53 of the mounting base 60 and the concave portion 64 of the base 50, a spherical body 110 that is in contact with the concave portions 53 and 64 is disposed in a rotatable state. By turning the adjusting screw 200 to adjust the distance T2 between the surface 60A of the mounting base 60 and the head 200A of the adjusting screw 200, the mounting base 60 is centered on the center 110A of the sphere 110 with respect to the base 50. Rotate in the Y-axis direction. The recessed part 64 of the mounting base 60 and the concave part 53 of the base part 50 are It has a conical taper and holds the sphere 110 in a slippery state!

[0042] The longitudinal direction of the long hole 51 is parallel to the X-axis. As shown in FIG. 8B, the distance between the two inner side surfaces 52 parallel to the longitudinal direction of the long hole 51 is widened in the direction from the surface 50C toward the surface 50D. The spherical surface 201A of the curved surface portion 201 of the head 200A of the adjustment screw 200 contacts the inner surface 52 of the long hole 51. In this state, as shown in FIG. 8A, the adjusting screw 200 is not in contact with the inner side surface 51 A that intersects the longitudinal direction of the long hole 51. As shown in FIG. 8A, the holding screw 210 has a head 210A and a shaft portion 210B extending from the head 210A, and the shaft portion 210B has a screw groove portion 21 OC having a screw groove. . The holding screw 210 is inserted into the surface 50D force slot 251 of the base 50, and the screw groove 210C is inserted into the screw hole 66 of the mounting base 60 and fixed. Between the head 210A of the holding screw 210 and the base 50, an elastic portion 211 (a helical spring) is disposed.

[0043] When the adjustment screw 200 is rotated in a direction to be tightened into the screw hole 66 of the mounting base 60, the head 200A of the adjustment screw 200 approaches the mounting base 60. Accordingly, the portion 50G passing through the elongated hole 51 from the recess 53 of the base 50 and the portion 60F passing through the screw hole 66 from the recess 64 of the mounting base 60 approach each other. Since the direction facing the surfaces 50C and 50D of the base 50 is maintained, the mounting base 60 rotates around the Y axis at the center 110A of the sphere 110, and the part 60F of the mounting base 60 approaches the base 50. To do. Accordingly, the portion 50H passing through the long hole 251 from the recess 53 of the base 50 and the portion 60G passing through the screw hole 66 from the recess 64 of the mounting base 60 are separated from each other. In this manner, the direction in which the surface 60B of the mounting base 60 with respect to the base 50 faces can be rotated in the Y-axis direction.

[0044] When the adjustment screw 200 is rotated in the direction of loosening from the screw hole 66 of the mounting base 60, the elastic portion 211 brings the base 50 portion 50F and the mounting base 60 portion 60E closer together, and the head of the adjustment screw 200 20 OA moves away from mount 60. Accordingly, the portion 60F passing through the screw hole 66 from the concave portion 64 of the mounting base 60 also separates the portion 50G force passing through the long hole 51 from the concave portion 53 of the base 50. Since the direction to face 50C, 50D of the base 50 is maintained, the mounting base 60 rotates around the Y axis at the center 110A of the sphere 110, and the part 60G of the mounting base 60 is separated from the base 50H force . Accordingly, the portion 50H that passes from the recess 53 of the base 50 through the elongated hole 251 and the portion 60G that passes from the recess 64 of the mounting base 60 to the screw hole 66 approach each other. Thus, the direction in which the surface 60B of the mounting base 60 faces the base 50 can be rotated around the Y-axis direction. Note that, even if the mounting table 60 rotates about the Y axis, the adjustment screw 200 and the holding screw 210 are perpendicular to the surface 60 mm of the mounting table 60. Since the adjusting screw 200 and the holding screw 210 are respectively inserted into the long holes 51 and 251 having the longitudinal direction in the X-axis direction, the adjusting screw 200 and the holding screw 210 are arranged with respect to the surfaces 50C and 50D of the base 50. The angle can be changed.

[0046] When the tilt angle Θ when the imaging device 100 held on the mounting base 60 is rotated in the horizontal direction, that is, the X-axis direction is adjusted, the shaft portion 200B of the adjusting screw 200 becomes the surface 5 of the base 50. It extends at an angle rather than perpendicular to 0C and 50D.

9A and 9B are cross-sectional views of the tilt adjustment unit 90 shown in FIG. 6B. The shaft portion 200B of the adjustment screw 200 extends perpendicularly to the surface 60A of the mounting base 60. In Fig. 9A, the shaft part 200B is the surface 50C, 50D of the base 50 extending vertically. In FIG. 9B, the vertical axis extends to the vertical axis of 200 mm and the vertical axis of the base 50 is inclined with respect to the surfaces 50C and 50D. In the tilt adjustment section 90 of the imaging device mounting apparatus 1 in the embodiment, a curved surface section 201 having a spherical surface 201A protruding in a direction in which the shaft section 200 of the head 200 of the adjustment screw 200 extends is formed. As shown in Fig. 9Β, the shaft of the adjusting screw 200 200 咅 ί or the surface 50C of the base 50 50C, 50D The extending direction of the shaft part 200Β rotates about the center of curvature P11 of 201A, and the spherical surface 201A continues to contact the two inner side surfaces 52 of the elongated hole 51 at the point 52Α. The two points 52Α and the center of curvature P11 are located on the straight line 51B. The center of curvature P11 is located at the point where the straight line 51B connecting the point 52Α on the inner surface 52 intersects the central axis 200D of the shaft portion 200Β of the adjusting screw 200. Therefore, even if the adjustment screw 200 is inclined with respect to the central shaft 200D force faces 50C and 50D, the adjustment screw 200 with little positional deviation can rotate smoothly with respect to the base 50. Even if the adjustment screw 200 is used and the angle is adjusted to an arbitrary value, the shaft portion 200B of the adjustment screw 200 is always perpendicular to the surface 60A of the mounting base 60.

[0048] In the tilt adjustment unit 90 of the imaging device mounting apparatus 1 in the embodiment, since the sphere 110 is arranged inside the recess 54 formed in the base 50, the space 50C between the surfaces 50C and 50D of the base 50 It becomes possible to arrange the center 110A of the sphere 110 in the recess 54. As a result, the mounting base 60 with respect to the base 50 accompanying the tilt adjustment of the image sensor 100 in the X-axis direction and the Y-axis direction 60 It is possible to reduce the displacement of the X-axis direction and Y-axis direction. With this arrangement of the sphere 110, the change in the position where the base 50 and the spherical surface 201A of the adjusting screw 200 abut when the tilt angle is changed can be reduced, and the angle can be adjusted in a wider range.

In the tilt adjustment unit 90 in the embodiment, the center 110A of the sphere 110 is arranged on an extension line of the optical axis 501A passing through the center of the imaging surface 110A of the imaging element 100! With this arrangement, the mounting base 60 rotates with respect to the base 50 about the point on the optical axis 501A, and therefore it is possible to prevent movement of the image by adjusting the tilt angle Θ of the image sensor 100.

[0050] With the imaging device mounting apparatus 1 in the embodiment, the direction of the imaging surface 110A of the imaging device 100 mounted on the mounting base 60 can be changed to either the horizontal direction or the vertical direction. The tilt angle Θ in any direction in the vertical direction can be adjusted.

[0051] In the tilt adjustment section 90 of the image sensor mounting device 1 in the embodiment, as shown in Figs. 6 and 6, a long hole 51 having a longitudinal direction in which the adjustment screw 200 moves is formed in the base 50. Is done. The hole through which the adjusting screw 200 passes is not limited to a long hole.

FIG. 10A and FIG. 10B are cross-sectional views of another tilt adjustment unit 190 of the image sensor mounting apparatus 1 in the embodiment. In FIG. 10A, the surface 60 of the mounting base 60 and the surface 50C of the base 50 are parallel to each other. In FIG. 10B, the surface 60Α of the mounting base 60 and the surface 50C of the base 50 are not parallel to each other but inclined. In FIG. 10A and FIG. 10B, the same parts as those in FIG.

[0053] In the tilt adjustment unit 190 shown in FIGS. 10A and 10B, the base 50 has the adjustment screw 200 and the holding screw 210 instead of the long holes 51 and 251 through which the adjustment screw 200 and the holding screw 210 pass. Holes 351 and 451 are formed. The holes 351 and 451 respectively have inner surfaces 151 and 551 that project in an annular shape having a circular cross section. The spherical surface 201A of the curved surface portion 201 protruding in the direction in which the shaft 200 20 extends also contacts the inner side surface 151 of the head 200Α force of the adjustment screw 200.

In the tilt adjustment section 190, the shaft section 210B of the holding screw 210 passes through the elastic section 211 (helical spring), the hole 300mm of the spherical saddle member 300, and the hole 451. The spherical shell 300 has a spherical surface 300 that protrudes toward the surface 50D of the base 50. The spherical surface 300 mm of the spherical member 300 abuts against the inner surface 551 of the hole 451. The elastic part 211 is between the head 210A of the holding screw 210 and the spherical member 300. The spherical member 300 is urged toward the inner surface 551 of the hole 451 of the base 50, and the spherical member 300, the base 50, and the mounting base 60 are biased.

[0055] As shown in FIG. 10A, the curvature centers Pl and P2 of the inner surface 151 projecting into the cylindrical surface of the hole 351 and the curvature centers P3 and P4 of the inner surface 551 projecting into the cylindrical surface of the hole 451 are The connecting straight line substantially coincides with the center P5 of the sphere 110.

[0056] As shown in FIG. 10B, the angle at which the adjustment screw 200 protrudes from the mounting base 60 can be adjusted to adjust the angle of inclination of the inner surface 60 surface 60A with respect to the base 50 surface 50C. The tilt angle Θ of the image sensor 100 mounted on the mounting base 60 can be adjusted. While adjusting the tilt angle Θ, the spherical surface 201A of the adjustment screw 200 and at least one side of the inner surface 151 of the hole 351 of the base 50 are kept in contact with each other, and the spherical surface 300B of the spherical member 300 through which the holding screw 210 passes is based. At least one side of the inner surface 551 of the hole 451 of the base 50 continues to abut. Therefore, the tilt adjustment unit 190 can smoothly adjust the tilt angle Θ.

In the photographing apparatus 1001 shown in FIG. 1C, the user can adjust the focus so that the entire area of the image is in focus while viewing an image such as a focus adjustment test chart actually photographed by the image sensor 100. By adjusting the adjusting screw 200, the tilt angle Θ can be adjusted.

Industrial applicability

[0058] In the imaging device mounting device and the imaging device using the imaging device according to the present invention, the tilt angle can be adjusted smoothly without the normal line of the imaging surface of the imaging device and the optical axis deviating greatly. This image sensor mounting device is useful as a photographing device such as a surveillance camera device, a video camera device, and a digital still camera device.

Claims

The scope of the claims

[1] An image pickup device mounting apparatus including an image pickup device having an image pickup surface through which an optical axis passes, the mount base on which the image pickup device is mounted and a first recess is formed;

A sphere having a center located on the optical axis and in contact with the first recess of the mounting table;

A base on which a second recess with which the sphere abuts is formed;

An image sensor mounting device comprising:

[2] The imaging device mounting device according to [1], wherein the first recess and the second recess have a conical shape.

[3] an adjusting screw capable of adjusting a distance between the mounting base and the base;

An elastic part that urges the mounting base and the base to approach each other;

The adjustment screw, the first recess, and the elastic portion are provided on a straight line such that the first recess is located between the adjustment screw and the elastic portion. The image sensor mounting device according to 1.

[4] The adjusting screw is

The head,

A shaft extending from the head;

A screw groove provided in the shaft portion, and a screw groove portion;

A curved surface portion having a spherical surface protruding in a direction in which the shaft portion extends from the head portion, and

4. The mounting base is formed with a screw hole into which the screw groove portion of the adjustment screw is inserted, and the base is formed with a hole through which the shaft portion of the adjustment screw passes. Image sensor mounting device.

5. The imaging element mounting device according to claim 4, wherein the hole of the base is a long hole having a longitudinal direction in a direction connecting the second recess and the hole.

[6] The elongated hole has two inner surfaces parallel to the longitudinal direction,

6. The imaging according to claim 5, wherein an interval between the two inner side surfaces is widened in a direction facing the mounting base from the mounting base, and the spherical surface of the adjustment screw abuts on the two inner side faces. Device mounting device.

7. The imaging element mounting device according to claim 6, wherein the two points where the spherical surface of the adjustment screw abuts on the two inner surfaces and the center of curvature of the spherical surface of the adjustment screw are located on a straight line. Place.

[8] The imaging device mounting device according to [4], wherein the hole of the base has an inner side surface protruding on a cylindrical shape with which the spherical surface of the adjustment screw abuts.

9. The imaging element mounting device according to claim 3, further comprising a spherical portion having a spherical surface that is urged by the elastic portion into the hole of the base and abuts the base.

[10] The image pickup device mounting apparatus according to [3], further comprising a holding screw for holding the elastic portion.

[11] The base is formed with a recess having a bottom in which the second recess is formed,

2. The imaging element mounting device according to claim 1, wherein the center of the sphere is located in the recess of the base.

[12] An imaging device having an imaging surface through which the optical axis passes and outputting a signal;

A mounting table on which the image sensor is mounted and a first recess is formed;

A base on which a second recess with which the sphere abuts is formed;

A video signal processing unit that processes a signal output from the image sensor and outputs a video signal;

An imaging device with