JP2022026135A - Imaging apparatus and optical device - Google Patents

Abstract

To provide an imaging apparatus capable of moving the direction and position of a mirror with high accuracy.SOLUTION: An imaging apparatus includes an imaging optical system of which an image acquisition surface is a focal surface, and further includes an imaging unit for acquiring image data by imaging a subject within an imaging range from an angle with the subject placed within the depth of field. The imaging optical system includes a mechanism which has a mirror with a part of a reflection plane being an effective area and which moves the mirror with 6 degrees of freedom.SELECTED DRAWING: Figure 4

Description

The present invention relates to an image pickup apparatus and an optical apparatus.

Patent Document 1 discloses that in a projector that projects an image in an oblique direction, the orientation of the reflective optical element is adjusted in two orthogonal axial directions, and the guide axis is held in the groove portion to give a degree of freedom of rotation. ing.

Patent Document 2 discloses that the inclination of the mirror holding member is adjusted by pushing and pulling three adjusting screws.

Japanese Unexamined Patent Publication No. 2011-059459 Japanese Unexamined Patent Publication No. 2007-011258

One embodiment according to the technique of the present disclosure can provide an image pickup apparatus capable of moving the direction and position of a mirror with high accuracy.

The imaging device according to the first aspect of the present invention includes an imaging optical system in which the image acquisition surface is a focal surface, and images of a subject within the imaging range are captured within the depth of field and imaged from an angle. The imaging optical system includes a mirror in which a part of the reflecting surface is an effective region, and includes a mechanism for moving the mirror with six degrees of freedom.

In the image pickup apparatus according to the second aspect of the present invention, the image pickup range is set to a region different from the optical axis of the image formation optical system, and the image pickup unit images the subject in a face-to-face image.

In the image pickup apparatus according to the third aspect of the present invention, the mechanisms for moving in six degrees of freedom are independent in each degree of freedom.

In the image pickup apparatus according to the fourth aspect of the present invention, a holding frame having three faces orthogonal to each other for holding the mirror is further provided, and the mechanism applies an external force to the three faces of the holding frame. Move with freedom.

The image pickup apparatus according to the fifth aspect of the present invention further includes an elastic member that presses the mirror downward in the vertical direction with respect to the holding frame.

In the image pickup apparatus according to the sixth aspect of the present invention, the elastic member presses the mirror at a plurality of points.

In the image pickup apparatus according to the seventh aspect of the present invention, the mechanism has a first fixing element that applies an external force to the first surface of the holding frame and a second fixing element that applies an external force to the second surface of the holding frame. It includes a fixing element and a third fixing element that applies an external force to the third surface of the holding frame.

In the image pickup apparatus according to the eighth aspect of the present invention, the first fixing element is a first urging member that contacts the first surface to hold the position of the holding frame, and the first urging member. A second fastening member having a first fastening member for fixing the position, and a second fixing element having a second urging member in contact with the second surface to hold the position of the holding frame, and a second urging member. It has a second fastening member for fixing the position of the member, the first urging member and the second urging member are elastic members, and the first fastening member and the second fastening member are screw members. Is.

In the image pickup apparatus according to the ninth aspect of the present invention, the holding frame has a facing first surface arranged parallel to the first surface and opposed to the second surface facing the second surface. With a surface, the first fixing element has a first fixing member in contact with the opposing first surface, and the second fixing element has a second fixing member in contact with the opposing second surface. However, the first fixing member and the second fixing member are screw members.

In the image pickup apparatus according to the tenth aspect of the present invention, the third fixing element has a member in contact with the third surface and a third fixing member for fixing the member, and the member is a spacer. , The third fixing member is a screw member.

In the image pickup apparatus according to the eleventh aspect of the present invention, the third fixed elements are arranged at three positions on the third surface and are evenly arranged in the circumferential direction about the central axis of the holding frame.

In the image pickup apparatus according to the twelfth aspect of the present invention, the mirror has an aspherical shape.

In the image pickup apparatus according to the thirteenth aspect of the present invention, the holding frame has a light-shielding member that suppresses the passage of light rays in the non-effective region located on the outer periphery of the effective region of the mirror.

In the image pickup apparatus according to the fourteenth aspect of the present invention, the image pickup unit includes an image pickup device that acquires image data obtained by capturing an image of a subject.

The optical device according to the fifteenth aspect of the present invention has an imaging optical system arranged obliquely with respect to an image acquisition surface, and the imaging optical system has a mirror in which a part of the reflecting surface is an effective region. However, it was equipped with a mechanism to move the mirror with 6 degrees of freedom.

In the optical device according to the sixteenth aspect of the present invention, the mechanisms for moving in six degrees of freedom are independent in each degree of freedom.

FIG. 1 is a diagram showing a usage state of the image pickup apparatus. FIG. 2 is a diagram showing an imaging optical system of an imaging device. FIG. 3 is a diagram showing an imaging optical system of an imaging device. FIG. 4 is an overall perspective view of the image pickup apparatus. FIG. 5 is an exploded perspective view of the mirror in the image pickup apparatus and the mechanism for moving the mirror. FIG. 6 is an enlarged perspective view including a mirror of the image pickup apparatus and a mechanism for moving the mirror. FIG. 7 is an explanatory diagram showing the structure of the elastic member. FIG. 8 is an exploded perspective view of a first mechanism for moving the image pickup element in the image pickup apparatus and a second mechanism. FIG. 9 is a perspective view showing a state in which the image pickup device is mounted on the auxiliary device. FIG. 10 is a view of the auxiliary device on which the image pickup device is mounted as viewed from the bottom surface. FIG. 11 is a plan view for explaining the movement of the mirror. FIG. 12 is a plan view for explaining a method of fixing the mirror. FIG. 13 is a perspective view for explaining the movement of the mirror. FIG. 14 is a partially enlarged perspective view of the image pickup apparatus that has completed the movement of the mirror. FIG. 15 is a perspective view of the image pickup apparatus as viewed from below in the Z-axis direction. FIG. 16 is a cross-sectional view of an image pickup apparatus including the first mechanism. FIG. 17 is a bottom view of the image pickup apparatus when viewed from the optical axis direction. FIG. 18 is a perspective view of the image pickup apparatus as viewed from below in the Z-axis direction. FIG. 19 is a cross-sectional view of an image pickup apparatus including a mirror. FIG. 20 is a diagram illustrating the positional relationship between the optical axis and the image pickup device.

One embodiment of the image pickup apparatus according to the present invention is as follows. In the description, the accompanying drawings will be referred to as necessary.

FIG. 1 is a diagram showing a usage state of the image pickup apparatus. As shown in FIG. 1, the image pickup apparatus 30 is a perspective-type stand scanner that captures an image of a subject (work W) placed within the image pickup range 20 from an angle and acquires image data. This type of image pickup apparatus 30 realizes that the image pickup range 20 is set in a region not including the optical axis of the imaging optical system, that is, a region different from the optical axis, by using a mirror 10 (see FIG. 2) described later. can. The image pickup apparatus 30 can set the image pickup range 20 in a region not including the optical axis OA (see FIG. 2) of the imaging optical system, and all the subjects (main subjects) in the image pickup range 20 are contained within the depth of field. , The subject can be imaged diagonally as a face-to-face image. The image pickup apparatus 30 of the embodiment takes an image of the work W horizontally placed in the image pickup range 20 from diagonally above the work W. The Z axis is in the vertical direction. The X-axis and the Y-axis are orthogonal to the Z-axis, and the X-axis and the Y-axis are orthogonal to each other. In the embodiment, the Z-axis direction coincides with the optical axis direction of the imaging optical system. Here, diagonally upward is a position where the Z-axis coordinates are positive outside the X-axis and Y-axis coordinates of the imaging range 20 when the imaging range 20 is the X-axis and Y-axis coordinates. When the imaging range 20 is the X-axis and Z-axis coordinates, the position where the Y-axis coordinates outside the image area 20 are positive, and when the imaging range 20 is the Y-axis and Z-axis coordinates, the X-axis coordinates outside the image area 20 are positive. The position is diagonally upward.

2 and 3 are views showing the imaging device 30 imaging optical system.

As shown in the figure, the image pickup apparatus 30 includes an image pickup unit having an imaging optical system 32 including a mirror 10 and an image pickup element 33. The image pickup apparatus 30 faces the subject (work W) diagonally downward and takes an image.

The imaging optical system 32 has one mirror 10 having a positive power and an optical system RO composed of a plurality of lenses and having a positive power in order from the object side. As the luminous flux, the luminous flux A in the vicinity of the optical axis OA and the luminous flux B having the maximum angle of view are also entered. Further, along the optical axis OA, the mirror 10 side is described as the object side, and the image plane Sim side is described as the image side. The intermediate image I and the aperture stop St do not show the shape but show the position on the optical axis.

The imaging optical system 32 of the image pickup apparatus 30 includes one mirror 10 having a positive power and an optical system RO composed of a plurality of lenses and having a positive power in order from the object side, and the mirror 10 and optics. An intermediate image I is formed between the system RO and the system RO. By forming the intermediate image I in the imaging optical system in this way, it is possible to suppress the expansion of the luminous flux in the imaging optical system. This makes it possible to construct a compact and wide-angle imaging optical system.

As an example, the optical system RO of the embodiment includes a front group GF composed of four lenses L1 to L4 (first lens L1, second lens L2, third lens L3, and fourth lens L4) in order from the object side. It has an aperture aperture St and a rear group GR composed of three lenses L5 to L7 (fifth lens L5, sixth lens L6 and seventh lens L7).

The mirror 10 and the optical system RO of the embodiment have a common optical axis OA and have a rotationally symmetric shape with the optical axis OA as the axis of rotation. With such a configuration, the design of the imaging optical system 32 becomes easy. Further, the processability and assembling property of the optical element constituting the imaging optical system 32 can be improved. This makes it possible to improve the performance while suppressing the cost of the imaging optical system. In embodiments, the mirror 10 has an effective domain EA in which a portion of the reflective surface is utilized for imaging. The periphery of the effective domain EA is an ineffective domain IA that is not used for imaging. In the present embodiment, the optical axis OA of the optical system RO is set to be included in the ineffective region IA. In the imaging optical system 32 of the embodiment, the regions of the mirror 10 and the optical system RO that are not used for imaging are partially cut off. Such a shape in which a region not used for imaging is partially cut is also included in a rotationally symmetric shape having the optical axis OA as the axis of rotation.

The mirror 10 of the embodiment preferably has an aspherical shape. As described above, by forming the mirror 10 which is arranged on the object side most and has a large effective diameter into an aspherical shape, it is advantageous for correcting curvature of field, coma, astigmatism, and distortion.

In the optical system RO of the embodiment, the first lens L1 (the lens on the most object side of the optical system RO) is composed of a positive lens having a concave surface facing the object side. By making the object side of the first lens L1 concave in this way, it is possible to widen the angle of view while suppressing the diameter of the first lens L1. Further, by using the first lens L1 as a positive lens, the light flux incident from the mirror 10 converges and is emitted. Therefore, the diameter of the next second lens L2 can be reduced, and the total length of the optical system RO can be shortened. Therefore, the imaging optical system 32 can be miniaturized.

As described above, the imaging optical system 32 of the embodiment can form a compact and wide-angle imaging optical system. Therefore, the image pickup device 30 provided with the imaging optical system 32 of the embodiment can also be configured as a compact image pickup device capable of capturing a wide range.

In the imaging optical system 32 having the above configuration, the distance on the optical axis OA from the reflecting surface of the mirror 10 to the imaging surface Sim is TTL, and the optical axis OA from the reflecting surface of the mirror 10 to the object surface Obj (image acquisition surface). When the above distance is ZOB, the distance on the optical axis OA from the surface of the first lens L1 on the object side to the image plane Sim is LL0, and the maximum image height is Ymax, the following conditional equations (1) and (2) ) Satisfying. The maximum image height Ymax means the distance between the image point farthest from the optical axis OA and the optical axis OA.

0.8 <TTL / ZOB <1 ... (1)
6 <LL0 / Ymax <15 ... (2)
For example, in order to install the image pickup device 30 on a surface (object surface Obj) having the same height as the mounting surface of the work W in the image pickup range 20, a mirror 10 that bends the luminous flux of the incident light is required. By not making it less than the lower limit of the conditional expression (1), the total length of the imaging optical system 32 is not shortened too much, which is advantageous for correcting aberrations. By not exceeding the upper limit of the conditional expression (1), it is advantageous for the miniaturization of the device.

By preventing the condition not to be less than the lower limit of the conditional expression (2), the total length of the optical system RO is not too short with respect to the maximum image height Ymax, which is advantageous for correcting aberrations. By not exceeding the upper limit of the conditional expression (2), it is advantageous for the miniaturization of the apparatus.

If the conditional expressions (1) and (2) are satisfied and at least one of the following conditional expressions (1-1) and (2-1) is satisfied, the characteristics will be better. Can be done.

0.85 <TTL / ZOB <0.95 ... (1-1)
7 <LL0 / Ymax <13 ... (2-1)
Further, when the focal length of the first lens is fL1 and the focal length of the optical system RO is fL0, it is preferable that the following conditional expression (3) is satisfied.

3 <fL1 / fL0 <50 ... (3)
In order to reduce the size of the optical system RO while increasing the effective diameter of the first lens L1, the first lens L1 needs an appropriate positive power. However, since it is advantageous for aberration correction to have a large effective diameter of the second lens L2, it is necessary that the positive power of the first lens L1 is not too large. By making sure that the value does not fall below the lower limit of the conditional expression (3), the positive power of the first lens L1 can be prevented from becoming too large. By not exceeding the upper limit of the following conditional expression (3), it is possible to secure an appropriate positive power for the first lens L1.

If the following conditional expression (3-1) is satisfied, better characteristics can be obtained.

4 <fL1 / fL0 <25 ... (3-1)
Further, the optical system RO has a configuration having a front group GF having a positive power, an aperture stop St, and a rear group GR having a positive power in order from the object side, and the front group GF is an object. It is preferable to have a configuration having a first lens L1, a second lens L2 having a negative power, and a third lens L3 having a positive power in order from the side. In this way, by making the power of the second lens L2 negative, it is possible to prevent the light beam from suddenly converging, and further, the first lens L1, the second lens L2, and the third lens L3 having a relatively large effective diameter. By setting the power arrangement of the three lenses as positive and negative positive configurations and dispersing the positive and negative actions, it is advantageous for correcting coma aberration and curvature of field.

Further, it is preferable that the rear group GR is provided with the junction lens C1 having the following configuration on the image side most. That is, a bonded lens composed of a positive lens and a negative lens and having positive power as a whole, in which the Abbe number of the positive lens is 50 or more and the Abbe number of the negative lens is 40 or less. be. In the imaging optical system 32 of the embodiment, the junction lens C1 is configured by the sixth lens L6 which is a positive lens and the seventh lens L7 which is a negative lens. As described above, by arranging the junction lens C1 having the above configuration on the image side of the aperture stop St and at a position where the height of the off-axis main light ray is high, it is advantageous for correcting the chromatic aberration of magnification. Further, when the front group GF is provided with a positive lens and a negative lens, it is advantageous to provide a positive lens and a negative lens in the rear group GR on the image side of the aperture stop St, which is advantageous for correcting curvature of field and distortion. Become.

It should be noted that the Abbe numbers of the positive lens and the negative lens constituting the bonded lens C1 satisfy the above conditions, the Abbe numbers of the positive lenses constituting the bonded lens C1 are 55 or more, and the negative numbers constituting the bonded lens C1. If at least one of the Abbe numbers of the lens is 30 or less is satisfied, better characteristics can be obtained.

Further, in the optical system RO, it is preferable that the first lens L1 is composed of an aspherical lens, while the lenses other than the first lens L1 are composed of a spherical lens. In this way, aberrations are effectively corrected by forming the first lens L1, which is located on the most object side of the optical system RO, has a large effective diameter, and has a small overlap of light fluxes with respect to different image heights, into an aspherical shape. can. Further, by using all the remaining lenses of the optical system RO as spherical lenses, it is advantageous to improve the workability and the assembling property of the optical elements constituting the imaging optical system. As a result, it is advantageous in improving the performance while suppressing the cost of the imaging optical system 32.

The image pickup device 33 is arranged on the image formation surface of the image formation optical system 32. As described above, in the image pickup apparatus 30 of the embodiment, the image pickup range 20 is set in a region not including the optical axis OA of the image formation optical system. The image pickup element 33 is arranged in the image circle of the imaging optical system 32 so as to have the following positional relationship. That is, the optical axis OA of the image pickup optical system 32 and the center C of the effective element region of the image pickup element 33 are arranged at different positions. In the embodiment, as shown in FIG. 2, the center C of the effective element region of the image pickup device 33 is arranged at a position closer to the image pickup range 20 than the optical axis OA of the image pickup optical system. In the embodiment, the close position means that the distance from the center C of the effective element region to the X-axis is shorter than the distance from the optical axis OA to the X-axis of the imaging optical system. The distance between the optical axis OA of the imaging optical system and the center C of the effective element region of the image pickup element 33 can be separated, for example, to a position where the optical axis OA of the imaging optical system is not included in the effective element region of the image pickup element 33. ..

The optical axis OA of the imaging optical system 32 can be arranged in the effective element region of the image pickup element 33, and a part of the image obtained by the imaging can be cut out to acquire the image data of the required region. It is also possible to do.

As the image pickup device 33, a known area image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) can be used.

According to the image pickup apparatus 30 having the above configuration, in the image pickup optical system 32, the image acquisition surface is the focal plane, and all the subjects (work W) within the image pickup range 20 are captured within the depth of field and imaged from an angle. can. In addition, an image facing the subject can be captured from an angle. Further, the imaging range 20 is set in a region that does not include the optical axis OA of the imaging optical system 32, that is, a region different from the optical axis OA.

In the image pickup apparatus 30 of the embodiment, the surface on which the work W in the image pickup range 20 is placed is set as the image acquisition surface. Therefore, the mounting surface of the work W is set as the focusing surface. In the image pickup apparatus 30, the mounting surface of the work W is set within the image pickup range 20. Therefore, by placing the sheet-shaped work W on the work W mounting surface within the imaging range 20 and taking an image, the entire work W can be captured within the depth of field and taken. The work mounting surface may be set at least within the imaging range of the imaging device 30. In the embodiment, the image pickup range of the image pickup apparatus 30 is set in substantially the same range as the work mounting surface.

As described above, the image pickup device 30 includes a mirror 10 and an image pickup element 33. In this type of perspective image pickup device 30, in order to acquire highly accurate image data, it is required to be able to move with high accuracy with respect to the mirror 10 and the image pickup element 33. If the mirror 10 and the image sensor 33 can be moved with high accuracy, these adjustments will be easy.

Hereinafter, the mechanism for moving the mirror 10 and the image pickup device 33 in the embodiment will be described.

First, the configuration of the image pickup apparatus 30 will be described with reference to FIG.

The image pickup apparatus 30 includes a support base 34, a holding member 36, an optical system holding member 38, and a housing 40 along the Z-axis. The support base 34 is a member installed on the mounting surface of the work W when the image pickup apparatus 30 is used. In the embodiment, the mounting surface is a plane parallel to the X-axis direction and the Y-axis direction.

The holding member 36 is a plate-shaped member, and is connected to the support base 34 by a screw member or the like. The holding member 36 is arranged at a position where the main surface of the holding member 36 is parallel to the X-axis direction and the Y-axis direction. The optical system holding member 38 includes four legs 38A and a pedestal 38B connected to the legs 38A and having a flat surface for holding the housing 40. In the embodiment, the leg portion 38A and the pedestal portion 38B are integrally molded. The four legs 38A are connected to the holding member 36 by a screw member or the like, and the holding member 36 and the optical system holding member 38 are connected to each other.

As shown in FIG. 4, a space is formed between the holding member 36 and the optical system holding member 38. In this space, a first mechanism 60 that moves the image pickup element 33 in the optical axis direction is arranged. An elastic member 50 is arranged between the first mechanism 60 and the optical system holding member 38. The elastic member 50 can apply an external force in a direction in which the optical system holding member 38 and the first mechanism 60 are separated from each other. For example, a wave washer can be applied to the elastic member 50. The optical system holding member 38 holds at least a part of the imaging optical system 32 inside, and holds the housing 40 outside.

The housing 40 is connected to the flat surface of the optical system holding member 38. The housing 40 is a hollow structure in which a space that can accommodate at least a part of the imaging optical system 32 is formed. In the embodiment, the housing 40 is composed of a first portion 41, a second portion 42, and a third portion 43 along the Z-axis direction.

The first portion 41 has a substantially cylindrical outer shape and has a cylindrical space inside. On the side of the optical system holding member 38, the first portion 41 has a cylindrical flange and a rectangular flange. The rectangular flange of the first portion 41 and the flat surface of the optical system holding member 38 are connected by a screw member or the like. By this connection, the optical system holding member 38 and the housing 40 are connected.

The second portion 42 is connected to the first portion 41 and is inclined in a direction away from the imaging range 20 as the distance from the first portion 41 increases. Further, it has a portion that expands toward the imaging range 20 as it approaches the third portion 43. A space is also formed in the second portion 42 and is connected to the space in the first portion 41.

The lid member 44 is attached to the second portion 42 on the side facing the imaging range 20. It covers the opening defined in the lid member 44, the second portion 42. The image pickup window 45 is formed on the lid member 44. The image pickup apparatus 30 can take an image of the subject (work W) diagonally downward through the opening of the second portion 42 and the image pickup window 45 of the lid member 44.

The third portion 43 is connected to the second portion 42. The third portion 43 has the shape of a substantially prism connecting the four side walls 43A, 43B, 43C and 43D, and has a space penetrating along the Z-axis direction. The four side walls 43A, 43B, 43C and 43D are arranged parallel to each other in the Z-axis direction. The space of the third portion 43 is connected to the space of the second portion 42 and opens upward on the Z axis.

As shown in FIG. 4, the mirror 10 is arranged in the third portion 43, and the reflective surface of the mirror 10 is directed to the first mechanism 60. The mechanism 100 is arranged in the third portion 43, and the mechanism 100 moves the mirror 10 with 6 degrees of freedom, respectively.

The first portion 41, the second portion 42, and the third portion 43 may be described simply as the housing 40.

Next, the mechanism 100 for moving the mirror 10 will be described. FIG. 5 is an exploded perspective view including the mirror 10 and the mechanism 100.

As shown in FIG. 5, the mechanism 100 has a holding frame 102 capable of accommodating the mirror 10. The holding frame 102 has the shape of a substantially prism connecting the four side walls 102A, 102B, 102C and 102D, and has a space penetrating along the Z-axis direction. The four side walls 102A, 102B, 102C and 102D are arranged along the Z-axis direction. The four side walls 102A, 102B, 102C and 102D are orthogonal to the adjacent side walls. The side wall 102A and the side wall 102B are orthogonal to each other, the side wall 102B and the side wall 102C are orthogonal to each other, the side wall 102C and the side wall 102D are orthogonal to each other, and the side wall 102D and the side wall 102A are orthogonal to each other. The side wall 102A and the side wall 102C arranged to face each other are parallel to each other, and the side wall 102B and the side wall 102D are parallel to each other. Further, the four side walls 102A, 102B, 102C and 102D face the side walls 43A, 43B, 43C and 43D of the third portion 43, respectively.

In the embodiment, the side wall 102A and the side wall 102B form two orthogonal surfaces of the holding frame 102, the side wall 102A constitutes the first surface, and the side wall 102B constitutes the second surface. The holding frame 102 has three mounting members 102E, 102F, and 102G for connecting to the third portion 43 of the housing 40. Through holes 102H, 102I, and 102J are formed in the three mounting members 102E, 102F, and 102G, respectively.

The third portion 43 of the housing 40 includes fixing portions 43E, 43F, and 43G at positions corresponding to the mounting members 102E, 102F, and 102G, respectively (see FIG. 7). Through holes 43H, 43I, and 43J are formed in the fixing portions 43E, 43F, and 43G, respectively.

Two first urging members 104 are attached to the side wall 43A of the third portion 43. As shown in FIG. 5, the first urging member 104 is a plate-shaped member, which is bent in a U shape in a cross-sectional view and has an opening downward in the Z-axis direction. The first urging member 104 is sandwiched between the side wall 43A.

The first urging member 104 includes a protrusion 104A that projects toward the side wall 102A of the holding frame 102. The protrusion 104A extends parallel to the Y-axis direction. When an external force is applied, the protrusion 104A is deformed. Due to the deformation of the protrusion 104A, the first urging member 104 functions as an elastic member. The first urging member 104 has a notch 104B that opens downward in the Z-axis direction on the side opposite to the protrusion 104A. The first urging member 104 comes into contact with the side wall 102A, which is the first surface, at the protrusion 104A.

Similarly, the two second urging members 106 are attached to the side wall 43B of the third portion 43. As shown in FIG. 5, the second urging member 106 is a plate-shaped member, which is bent in a U shape in a cross-sectional view and has an opening downward in the Z-axis direction. The second urging member 106 is sandwiched between the side wall 43B.

The second urging member 106 includes a protrusion 106A that projects toward the side wall 102B of the holding frame 102. The protrusion 106A extends parallel to the X-axis direction. When an external force is applied, the protrusion 106A is deformed. Due to the deformation of the protrusion 106A, the second urging member 106 functions as an elastic member. The second urging member 106 has a notch 106B that opens downward in the Z-axis direction on the side opposite to the protrusion 106A. The second urging member 106 comes into contact with the side wall 102B, which is the second surface, at the protrusion 106A.

The first urging member 104 is fixed by the first fastening member 108, and the second urging member 106 is fixed by the second fastening member 110. The first fastening member 108 and the second fastening member 110 are screw members, for example, set screws.

As shown in FIG. 5, the mounting member 102E and the fixing portion 43E are aligned and fixed by a third fixing member 111, for example, a screw member. A member 112, for example, a spacer, is arranged between the mounting member 102E and the fixing portion 43E, if necessary.

Similarly, the mounting member 102F and the fixing portion 43F are aligned and fixed by a third fixing member 113, for example, a screw member. A member 114, for example, a spacer, is arranged between the mounting member 102F and the fixing portion 43F, if necessary. Further, the mounting member 102G and the fixing portion 43G (not shown) are aligned and fixed by a third fixing member 115, for example, a screw member. A member 116, for example, a spacer, is arranged between the mounting member 102G and the fixing portion 43G, if necessary.

In the embodiment, the mounting members 102E, 102F and 102G form a third surface and are orthogonal to the side wall 102A forming the first surface and the side wall 102B forming the second surface.

Next, a member for fixing the mirror 10 to the holding frame 102 will be described. The mirror 10 includes an expansion unit 10A and an expansion unit 10B on the side of the imaging range 20 and the opposite side, respectively. The expansion portion 10A and the expansion portion 10B are in contact with the holding frame 102. The elastic member 120 is in contact with the expansion portion 10A and presses the mirror 10 vertically downward (downward in the Z axis) against the holding frame 102. Further, the elastic member 121 is in contact with the expansion portion 10B and presses the mirror 10 downward in the vertical direction (downward in the Z-axis direction) against the holding frame 102. The elastic members 120 and 121 are fixed to the holding frame 102 by the screw members 122 at both ends thereof.

Through holes 10C and 10D are formed in the expansion portion 10A and the expansion portion 10B, respectively. Pins (not shown) are provided at positions corresponding to the through holes 10C and 10D of the holding frame 102. The holding frame 102 and the mirror 10 are positioned by inserting the pins into the through holes 10C and 10D. In the embodiment, the through holes 10C and 10D have a circular shape in a plan view seen from the Z-axis direction. One of the through holes 10C and 10D can be formed into an elongated hole shape in a plan view without being limited to a circular shape. By forming the elongated hole shape, the degree of freedom in positioning the holding frame 102 and the mirror 10 can be improved.

When the components shown in FIG. 5 are assembled, as shown in FIG. 6, the mirror 10 and the mechanism 100 for moving the mirror 10 are completed and function as a part of the image pickup apparatus 30.

Next, a method of fixing the mirror 10 to the holding frame 102 by the elastic member 120 will be described. FIG. 7 is a view of FIG. 6 in the Y-axis direction. FIG. 7A shows an example of the elastic member 120, and FIG. 7B shows another example of FIG. 7B.

As shown in FIG. 7A, the elastic member 120 has a plate-like shape in which three bent portions 120A are formed. The bent portion 120A projects downward in the Z-axis direction. By fixing both ends of the elastic member 120 to the screw member 122, the elastic member 120 presses the mirror 10 vertically downward at the bending portion 120A and at the expansion portion 10A.

As shown in FIG. 7B, the elastic member 120 has a plate-like shape in which two bent portions 120A are formed. By fixing both ends of the elastic member 120 to the screw member 122, the elastic member 120 presses the mirror 10 vertically downward at the bending portion 120A at the expansion portion 10A as in FIG. 7A.

7 (A) and 7 (B) show a case where the elastic member 120 presses the mirror 10 at a plurality of places, but it is sufficient that the elastic member 120 can be pressed at at least one place. When pressing at one place, it can be pressed at one bent portion 120A formed on the elastic member 120. Further, the elastic member 120 has a flat plate shape and can be pressed on the entire surface.

In the embodiment, the mirror 10 is fixed to the holding frame 102 via the elastic member 120. The mirror 10 is not directly fixed to the holding frame 102 by the screw member 122. Since the mirror 10 is not directly fixed by the screw member 122, it is possible to avoid applying an unintended external force to the mirror 10 which is an optical component, and it is possible to maintain the optical accuracy of the mirror 10.

When the elastic member 120 presses the mirror 10 at a plurality of places, a space is created between the elastic member 120 and the expansion portion 10A as shown in FIG. 7. Since it has a space, the elastic member 120 can be deformed, and stress on the mirror 10 can be released. The same structure can be applied to the elastic member 121 that presses the expansion portion 10B downward in the vertical direction.

Next, the first mechanism 60 and the second mechanism 70 for moving the image pickup device 33 will be described. FIG. 8 is an exploded perspective view including the first mechanism 60 and the second mechanism 70.

The first mechanism 60 includes a first ring member 61 and a second ring member 62.

The first ring member 61 is a cylindrical member having a hollow structure in which a space capable of accommodating the second ring member 62 is formed. The first ring member 61 can rotate about a rotation axis parallel to the Z-axis direction. The first ring member 61 includes a thread groove 61A formed along the inner surface.

The second ring member 62 includes a cylindrical member 63 having a cylindrical shape and a holding substrate 64 connected to the cylindrical member 63. The image sensor 33 is fixed to the holding substrate 64. The cylindrical member 63 and the holding substrate 64 are connected and fixed by the screw member 65. With this configuration, the second ring member 62 can fix the image pickup element 33.

The cylindrical member 63 is provided with a thread groove 63A on the outer surface. The thread groove 63A of the cylindrical member 63 and the thread groove 61A of the first ring member 61 are screw-engaged. The inner surface of the first ring member 61 and the outer surface of the second ring member 62 are relatively rotatable along the thread groove 61A and the thread groove 63A.

The cylindrical member 63 includes an engaging member 66 composed of a convex member extending in the optical axis direction on the upper surface of the cylindrical member 63. Further, the optical system holding member 38 includes an engaged member 38C (see FIG. 16) composed of a concave member that opens toward the engaging member 66 on the side opposite to the flat surface. The engaging member 66 and the engaged member 38C can be engaged with each other. In the embodiment, the shapes of the engaging member 66 and the engaged member 38C exemplify the combination of the convex member and the concave member, but the shape may be a combination of the concave member and the convex member.

The second mechanism 70 includes a plurality of fastening members 71 that come into contact with the first ring member 61 from the optical axis direction. In the embodiment, the fastening member 71 is a screw member. The fastening member 71 is inserted into, for example, a screw hole 36A penetrating the holding member 36. By rotating the fastening member 71, the fastening member 71 can move in a direction toward or away from the first ring member 61.

Next, the operation of the first mechanism 60, the second mechanism 70, and the mechanism 100 will be described. As shown in FIG. 9, the image pickup device 30 is mounted on the auxiliary device 150, for example. By mounting on the auxiliary device 150, the first mechanism 60, the second mechanism 70, and the mechanism 100 can be easily operated in the image pickup device 30. The auxiliary device 150 includes a table 152, two support members 154 and 156 arranged on the table 152, two micrometer 158 supported by the support member 154, and two support members 156. It is equipped with a micrometer 160.

FIG. 10 is a view of the auxiliary device 150 as viewed from the side opposite to the surface on which the image pickup device 30 is placed. As shown in FIG. 10, the table 152 has an opening 162 at a position where the image pickup apparatus 30 is placed. As shown in the enlarged view, the fastening member 71 is exposed from the defined opening 162.

Next, the mechanism 100 for moving the mirror 10 will be described. FIG. 11 is a plan view of the image pickup apparatus 30 as viewed from the Z-axis direction. Support members 154 and 156 are omitted for ease of understanding.

As shown in FIG. 11, the holding frame 102 to which the mirror 10 is fixed is set in the space inside the third portion 43 of the housing 40. Two first urging members 104 are arranged on the side wall 43A of the third portion 43. The protrusion 104A (not shown) is directed toward the holding frame 102. The first urging member 104 comes into contact with the side wall 102A, which is the first surface.

Similarly, two second urging members 106 are arranged on the side wall 43B of the third portion 43. The protrusion 106A (not shown) is directed toward the holding frame 102. The second urging member 106 comes into contact with the side wall 102B, which is the second surface.

Two micrometer 158s are arranged at positions facing the first urging member 104 with the holding frame 102 interposed therebetween. Further, two micrometer 160s are arranged at positions facing the second urging member 106 with the holding frame 102 interposed therebetween. The micrometer 158 can come into contact with the side wall 102C of the holding frame 102 through a through hole (not shown) formed in the side wall 43C of the third portion 43. Further, the micrometer 160 can come into contact with the side wall 102D of the holding frame 102 through a through hole (not shown) formed in the side wall 43D of the third portion 43.

In this state, the first urging member 104 and the second urging member 106 function as elastic members. The first urging member 104 urges the holding frame 102 toward the micrometer 158, and the second urging member 106 urges the holding frame 102 toward the micrometer 160.

For example, by operating the two micrometer 158 at the same distance, the holding frame 102 can be moved in parallel in the X-axis direction, and the mirror 10 fixed to the holding frame 102 can be moved in parallel in the X-axis direction. For example, by projecting the two micrometer 158s to the same length, the holding frame 102 is pushed by the micrometer 158 and moves toward the side wall 43A. Further, when the two micrometer 158s are shortened to the same length, the holding frame 102 is urged by the first urging member 104 and moves to the side of the side wall 43C. Similarly, by operating the two micrometer 160s at the same distance, the holding frame 102 can be moved in parallel in the Y-axis direction, and the mirror 10 fixed to the holding frame 102 can be moved in parallel in the Y-axis direction. Therefore, the mirror 10 can move in two directions (X-axis direction and Y-axis direction) with translational degrees of freedom (translational two degrees of freedom).

For example, by operating the two micrometer 158 and / or the two micrometer 160 at different distances, the holding frame 102 can be rotated in the Z-axis direction and the mirror 10 can be rotated in the Z-axis direction. Therefore, the mirror 10 can move with one rotation degree of freedom (one rotation degree of freedom) in one direction (Z-axis direction).

That is, it can be understood that the mirror 10 can move with three degrees of freedom of translation 2 degrees of freedom and rotation 1 degree of freedom.

It can be determined that the mirror 10 has moved to an appropriate position, for example, by using the contrast transfer function value (CTF value). When the CTF value is higher than a certain reference, it can be determined that the position of the mirror 10 is appropriate.

The first urging member 104 and the second urging member 106 are in contact with the holding frame 102 and are in a state of being urged. Therefore, the first urging member 104 and the second urging member 106 are in a state of holding the position of the holding frame 102.

Next, after moving the mirror 10, as shown in FIG. 12, the first fastening member 108 is inserted from the side of the notch 104B (not shown) of the first urging member 104 to form a protrusion 104A. To conclude. Deformation of the protrusion 104A (not shown) is restricted. Since the first fastening member 108 stops functioning as an elastic member of the first urging member 104, the position of the first urging member 104 is fixed by the first fastening member 108.

The second fastening member 110 is inserted from the side of the notch 106B (not shown) of the second urging member 106 and fastened to the protruding portion 106A (not shown). Deformation of the protrusion 106A is restricted. Since the second fastening member 110 stops functioning as an elastic member of the second urging member 106, the position of the second urging member 106 is fixed by the second fastening member 110. As shown by the alternate long and short dash line, it is preferable that the contact center of the micrometer 158 coincides with the contact center of the first fastening member 108. Similarly, it is preferable that the contact center of the micrometer 160 coincides with the contact center of the second fastening member 110. The contact center means a position in contact with the holding frame 102. "Agree" means a state in which a straight line (one-dot chain line) connecting the contact centers of both is parallel to the X-axis or the Y-axis. It can be fixed while the holding state of the holding frame 102 is maintained, and it is possible to prevent the holding frame 102 from being displaced.

Further, the first fixing member 130 is inserted through the through hole (not shown) of the side wall 43C of the third portion 43 and comes into contact with the side wall 102C of the holding frame 102. The side wall 102C constitutes a first surface facing the side wall 102A, which is the first surface.

The second fixing member 132 is inserted through the through hole (not shown) of the side wall 43D of the third portion 43 and comes into contact with the side wall 102D of the holding frame 102. The side wall 102D constitutes a facing second surface facing the side wall 102B, which is the second surface.

The first fixing member 130 and the second fixing member 132 are, for example, screw members. By making the through holes of the side wall 43C and the side wall 43D into screw holes, the first fixing member 130 and the second fixing member 132 are fixed. The holding frame 102 is fixed by the first fixing member 130 and the second fixing member 132, and the position of the mirror 10 is fixed.

The position of the holding frame 102 relative to the third portion 43 of the housing 40 is determined even when the external force from the micrometer 158 and the micrometer 160 is removed. The position of the mirror 10 fixed to the holding frame 102 is also determined.

As described above, in the embodiment, in the mechanism 100, the first urging member 104 that contacts the side wall 102A (first surface) and holds the position of the holding frame 102, and the first urging member 104. A first fixing element is configured by the first fastening member 108 that fixes the position. The first fixing element applies an external force to the side wall 102A of the holding frame 102.

Further, in the embodiment, the first fixing element further includes a first fixing member 130 in contact with the side wall 102C (opposing first surface).

Further, in the mechanism 100, a second urging member 106 that contacts the side wall 102B (second surface) to hold the position of the holding frame 102 and a second urging member 106 that fixes the position of the second urging member 106. The fastening member 110 constitutes a second fixing element. The second fixing element applies an external force to the side wall 102B of the holding frame 102.

Further, in the embodiment, the second fixing element further includes a second fixing member 132 in contact with the side wall 102D (opposing second surface).

Next, as shown in FIG. 13, a plurality of members 112, 114 and 116 are prepared. The members 112, 114 and 116 have the same shape in a plan view, for example. On the other hand, the thicknesses of the members 112, 114 and 116 can be different. In an embodiment, the plurality of members 112, 114 and 116 are prepared with the same thickness and different thicknesses. The member 112 is inserted between the mounting member 102E and the fixing portion 43E, the member 114 is inserted between the mounting member 102F and the fixing portion 43F, and the member 116 is inserted between the mounting member 102G and the fixing portion 43G.

When the plurality of members 112, 114, and 116 to be inserted have the same thickness, the holding frame 102 can be moved in parallel in the Z-axis direction, and the mirror 10 fixed to the holding frame 102 can be moved in parallel in the Z-axis direction. .. Therefore, the mirror 10 can move with one translational degree of freedom (one translational degree of freedom) in one direction (Z-axis direction).

Hold by inserting members 112, 114 and 116 of different thicknesses between the mounting member 102E and the fixing portion 43E, between the mounting member 102F and the fixing portion 43F, and between the mounting member 102G and the fixing portion 43G. The frame 102 can be rotated in the X-axis direction and the Y-axis direction, and the mirror 10 can be rotated in the X-axis direction and the Y-axis direction. Therefore, the mirror 10 can move with two degrees of freedom of rotation (two degrees of freedom of rotation) in two directions (Z-axis direction). The members 112, 114 and 116 may be elastic members such as springs.

That is, it can be understood that the mirror 10 can move with three degrees of freedom, one translational degree of freedom and two rotational degrees of freedom.

After moving the mirror 10, the holding frame 102 is fixed to the third portion 43 of the housing 40 by the third fixing members 111, 113 and 115, and the position of the holding frame 102 to which the mirror 10 is fixed is determined. ..

In the embodiment, the third fixing element is configured by the member 112 that comes into contact with the third surface and the third fixing member 111 that fixes the member 112. Similarly, by the third fixing member 113 for fixing the member 114 and the member 114 in contact with the third surface, and by the third fixing member 115 for fixing the member 116 and the member 116 in contact with the third surface. A third fixed element is configured.

The third fixing element applies an external force to the third surface. It is preferable that the third fixing elements are arranged at three positions on the third surface and are evenly arranged in the circumferential direction about the central axis of the holding frame 102. The member 112 and the third fixing member 111, the member 114 and the third fixing member 113, and the member 116 and the third fixing member 115 are centered on the central axis of the holding frame 102 and have a central angle of 120 °. Be placed. By arranging the mirrors evenly in the circumferential direction, the mirrors 10 can be rotated in the X-axis direction and the Y-axis direction in a well-balanced manner.

FIG. 14 is an image pickup device 30 in which the movement of the mirror 10 is completed. The image pickup device 30 is removed from the auxiliary device 150. As mentioned above, finally, the mirror 10 has 6 degrees of freedom, which is the sum of 2 translational degrees of freedom and 1 rotational degree of freedom, and 1 translational degree of freedom and 2 rotational degrees of freedom. You can move. In the embodiment, the mechanism 100 is independent of each of the six degrees of freedom.

By applying an external force to the holding frame 102, the mirror 10 is moved with 6 degrees of freedom. It is possible to suppress the application of an external force to the mirror 10, and it is possible to avoid deformation and stress of the mirror 10.

The operation of the first mechanism 60 and the second mechanism 70 that move the image pickup element 33 will be described. FIG. 15 is a perspective view of the image pickup apparatus 30 as viewed from below in the Z-axis direction. In addition, in order to make it easy to understand, the support base 34 is omitted and the holding member 36 is allowed to pass through. As shown in FIG. 15, the image sensor 33 is fixed to the holding member 36. The first ring member 61 constituting the first mechanism 60 is exposed from the optical system holding member 38. The first ring member 61 is configured to be rotatable in the direction indicated by the arrow.

FIG. 16 is a cross-sectional view of the image pickup apparatus 30 including the first mechanism 60. As shown in FIG. 16, the thread groove 61A of the first ring member 61 and the thread groove 63A of the cylindrical member 63 of the second ring member 62 are screw-engaged. The first ring member 61 and the second ring member 62 are configured to be relatively rotatable. While the first ring member 61 is rotatably configured, it is sandwiched between the holding member 36 and the optical system holding member 38, so that the movement of the first ring member 61 in the optical axis direction is restricted. ..

The engaging member 66 provided on the cylindrical member 63 and the engaged member 38C provided on the optical system holding member 38 engage with each other. The rotation of the second ring member 62 is regulated by the engagement between the engaging member 66 and the engaged member 38C. Therefore, the second ring member 62 does not rotate even when the first ring member 61 is rotated. On the other hand, the movement of the second ring member 62 in the optical axis direction is allowed. A plurality of engaging members 66 and engaged members 38C may be provided.

In the first mechanism 60, when the first ring member 61 is rotated, the second ring member 62 whose rotation is restricted is interlocked with the rotation of the first ring member 61 by screw engagement, and the optical axis is linked. You can move along the direction. By moving the second ring member 62, the image pickup device 33 fixed to the holding member 36 can be moved in the optical axis direction (Z-axis direction).

The engaging member 66 and the engaged member 38C function as a guide when the second ring member 62 moves in the optical axis direction, and the second ring member 62 moves stably along the optical axis direction. can.

FIG. 17 is a bottom view of the image pickup apparatus 30 when viewed from the optical axis direction. As shown in FIG. 17, the first ring member 61 has a non-overlapping portion 61B with respect to the holding member 36. Since the non-overlapping portion 61B can be easily touched by a person with a finger, the first ring member 61 can be rotated without using a tool. For example, as shown in FIG. 9, even when the image pickup device 30 is placed on the auxiliary device 150, the first ring member 61 can be easily rotated.

The first ring member 61 preferably has a non-overlapping portion 61B with respect to the support base 34. Here, the non-overlapping portion 61B is a portion protruding from the holding member 36.

Next, as shown in FIG. 15, the three fastening members 71 constituting the second mechanism 70 come into contact with the first ring member 61 from the optical axis direction. The three fastening members 71 can independently move in the optical axis direction. By making the movement amounts of the three fastening members 71 different from each other, the inclination of the first ring member 61 can be moved, and the inclination of the second ring member 62 screwed to the first ring member 61 can be moved. Can be moved. Therefore, the inclination of the image pickup device 33 fixed to the holding substrate 64 constituting the second ring member 62 with respect to the optical axis direction can be moved. As shown in FIG. 9, even when the image pickup device 30 is placed on the auxiliary device 150, the fastening member 71 can be operated through the opening 162 as shown in FIG. 10, and the optical axis direction of the image pickup element 33 can be operated. You can move the tilt with respect to.

In the embodiment, the elastic member 50 urges the first ring member 61 to the side of the holding member 36. The three fastening members 71 move the first ring member 61 in a direction that opposes the urging direction of the elastic member 50.

In the embodiment, it is preferable that the first mechanism 60 and the second mechanism 70 are independent mechanisms. The movement of the image sensor 33 in the optical axis direction and the inclination of the image sensor 33 with respect to the optical axis direction can be independently moved.

FIG. 18 is a perspective view of the image pickup apparatus as viewed from below in the Z-axis direction. The support base 34 and the holding member 36 are omitted for ease of understanding. Since the first ring member 61 is urged toward the holding member 36 by the elastic member 50, the three fastening members 71 basically come into contact with the first ring member 61. Therefore, when the first ring member 61 is rotated, the first ring member 61 and the fastening member 71 rub against each other. There is a concern that shavings (so-called dust) may be generated due to the friction between the first ring member 61 and the fastening member 71. In the embodiment, as shown in FIG. 18, the first ring member 61 includes a groove 61C on the bottom surface at a contact position with the fastening member 71. The groove 61C is provided on the entire circumference of the bottom surface of the first ring member 61. This is because the first ring member 61 rotates and therefore comes into contact with the fastening member 71 all around. When shavings are generated, the shavings enter the groove 61C and are prevented from diffusing.

As described in FIGS. 2 and 3, the mirror 10 has an effective domain EA in which a portion of the reflective surface is used for imaging. The periphery of the effective domain EA is an ineffective domain IA that is not used for imaging. It is desirable that the non-effective region IA is not exposed to unintended light rays. The configuration for that purpose will be described below.

FIG. 19 is a cross-sectional view of an image pickup apparatus including a mirror. As shown in FIG. 19, the holding frame 102 has a light-shielding member 102K that suppresses the passage of light rays in the non-effective region IA located on the outer periphery of the effective region EA of the mirror 10. The light-shielding member 102K passes light rays only in the effective region EA of the mirror 10. Since the light beam does not hit the ineffective region IA, stray light can be suppressed. The light-shielding member 102K is preferably configured integrally with the holding frame 102.

FIG. 20 is a diagram showing the relationship between the positions of the image pickup device and the imaging optical system. As described with reference to FIG. 2, the center C of the effective element region 33A of the image pickup device 33 and the optical axis OA of the imaging optical system 32 are different. Specifically, as shown in FIG. 20, the center C of the effective element region 33A of the image pickup device 33 is located closer to the image pickup range 20 than the optical axis of the image pickup optical system 32.

It is preferable that the center C of the effective element region 33A coincides with the central axes of the first mechanism 60 and the second mechanism 70. The image sensor 33 can be accurately moved in the optical axis direction, and the tilt can be moved with respect to the optical axis direction.

Although the image pickup device has been described in the embodiment, the mechanism capable of moving the mirror with six degrees of freedom can be applied to, for example, an optical device such as a projector provided with the mirror.

10 Mirror 10A Expansion part 10B Expansion part 10C Through hole 10D Through hole 20 Imaging range 30 Imaging device 32 Imaging optical system 33 Imaging element 33A Effective element area 34 Support 36 Holding member 36A Hole 38 Optical system holding member 38A Leg 38B Pedestal Part 38C Engagement member 40 Housing 41 First part 42 Second part 43 Third part 43A Side wall 43B Side wall 43C Side wall 43D Side wall 43E Fixed part 43F Fixed part 43G Fixed part 43H Through hole 43I Through hole 43J Through hole 44 Lid member 45 Imaging window 50 Elastic member 60 First mechanism 61 First ring member 61A Thread groove 61B Non-overlapping part 61C Groove 62 Second ring member 63 Cylindrical member 63A Thread groove 64 Holding substrate 65 Thread member 66 Engagement member 70 Mechanism of 2 71 Fastening member 100 Mechanism 102 Holding frame 102A Side wall 102B Side wall 102C Side wall 102D Side wall 102E Mounting member 102F Mounting member 102G Mounting member 102H Through hole 102I Through hole 102J Through hole 102K Light shielding member 104 First urging member 104A 104B Notch 106 Second urging member 106A Protrusion 106B Notch 108 First fastening member 110 Second fastening member 111 Third fixing member 112 Member 113 Third fixing member 114 Member 115 Third fixing member 116 Member 120 Elastic member 120A Bending part 121 Elastic member 122 Screw member 130 First fixing member 132 Second fixing member 150 Auxiliary device 152 Table 154 Support member 156 Support member 158 Micrometer 160 Micrometer 162 Opening A Light beam B Light beam C Center C1 junction lens EA effective region GF front group GR rear group I intermediate image IA non-effective region L1 lens (first lens)
L2 lens (second lens)
L3 lens (third lens)
L4 lens (4th lens)
L5 lens (fifth lens)
L6 lens (6th lens)
L7 lens (7th lens)
OA Optical axis Obj Object surface RO Optical system Sim Image plane St Aperture aperture W work

Claims (16)

It is equipped with an imaging optical system in which the image acquisition surface is a focal surface, and is equipped with an image pickup unit that captures a subject within the depth of field within the depth of field and images the image from an angle to acquire image data.
The imaging optical system has a mirror in which a part of the reflecting surface is an effective region.
An imaging device including a mechanism for moving the mirror with six degrees of freedom. The imaging range is set in a region different from the optical axis of the imaging optical system.
The imaging device according to claim 1, wherein the front imaging unit is an image pickup device that captures the subject as a frontal image. The imaging device according to claim 1 or 2, wherein the mechanism for moving with 6 degrees of freedom is independent of each degree of freedom. Further provided with a holding frame having three faces orthogonal to each other to hold the mirror.
The imaging device according to claim 1, wherein the mechanism is moved with 6 degrees of freedom by applying an external force to the three surfaces of the holding frame. An elastic member that presses the mirror downward in the vertical direction is further provided with respect to the holding frame.
The imaging device according to claim 4. The image pickup apparatus according to claim 5, wherein the elastic member presses the mirror at a plurality of places. The mechanism includes a first fixing element that applies an external force to the first surface of the holding frame, a second fixing element that applies an external force to the second surface of the holding frame, and a third of the holding frame. The imaging apparatus according to any one of claims 4 to 6, further comprising a third fixing element that applies an external force to the surface of the surface. The first fixing element is a first urging member that contacts the first surface and holds the position of the holding frame, and a first fastening member that fixes the position of the first urging member. And have
The second fixing element includes a second urging member that contacts the second surface and holds the position of the holding frame, and a second fastening member that fixes the position of the second urging member. And have
The image pickup apparatus according to claim 7, wherein the first urging member and the second urging member are elastic members, and the first fastening member and the second fastening member are screw members. The holding frame includes an opposed first surface arranged parallel to and opposed to the first surface, and an opposed second surface arranged parallel to and opposed to the second surface.
The first fixing element has a first fixing member in contact with the opposed first surface.
The second fixing element has a second fixing member in contact with the opposed second surface.
The image pickup apparatus according to claim 8, wherein the first fixing member and the second fixing member are screw members. The third fixing element has a member that comes into contact with the third surface and a third fixing member that fixes the member.
The image pickup apparatus according to any one of claims 7 to 9, wherein the member is a spacer and the third fixing member is a screw member. The image pickup apparatus according to claim 10, wherein the third fixing element is arranged at three positions on the third surface and is evenly arranged in the circumferential direction about the central axis of the holding frame. The imaging device according to any one of claims 1 to 11, wherein the mirror has an aspherical shape. The imaging device according to any one of claims 4 to 12, wherein the holding frame has a light-shielding member that suppresses the passage of light rays in an ineffective region located on the outer periphery of the effective region of the mirror. The image pickup apparatus according to any one of claims 1 to 11, wherein the image pickup unit includes an image pickup element for acquiring image data obtained by capturing an image of the subject. It has an imaging optical system that is arranged diagonally with respect to the image acquisition surface.
The imaging optical system has a mirror in which a part of the reflecting surface is an effective region.
An optical device provided with a mechanism for moving the mirror with 6 degrees of freedom. The optical device according to claim 15, wherein the mechanism for moving with six degrees of freedom is independent of each degree of freedom.

Images