Optical instrument

Abstract

To provide an optical instrument that is small-sized while ensuring the substrate footprint.SOLUTION: An optical instrument has: a first substrate that has a principal plane perpendicular to an optical axis direction of an optical system, and includes an inner diameter and an outer diameter centered on the optical axis direction; a second substrate that is connected with the first substrate, and has a principal plane parallel to the optical axis direction; and a stationary barrel that determines the position of the first substrate while restricting the movement in the optical axis direction of the first substrate. When seen from the optical axis direction, a connection part of the first substrate and the second substrate is arranged not to overlap a fixation part for the stationary barrel to fix a component different from the first substrate. When seen from the optical axis direction, at least part of the stationary barrel is located inside the outer diameter.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to optical instruments. [Background technology]

[0002] In recent years, optical devices such as digital cameras, video cameras, and interchangeable lenses have become larger in size as the control circuits mounted on the main boards have become larger as their functionality has improved, resulting in an increase in the area of ​​the main board, i.e., the width of the main board.

[0003] Patent Document 1 discloses an electric board mounting structure for an interchangeable lens with a high degree of freedom in order to secure a board mounting area without increasing the width of the main board. Specifically, the electric board mounting structure is disclosed, which is composed of at least one hard board substantially perpendicular to the optical axis, at least one hard board substantially parallel to the optical axis, and a board-to-board connector that connects both hard boards. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2003-172863 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, Patent Document 1 does not disclose any restrictions on the parts that are arranged around the hard board inside the interchangeable lens. In particular, a zoom lens is provided with a connection and rotation mechanism for moving the lens barrel, which is involved in changing the magnification, back and forth along the optical axis, and the arrangement of the hard board needs to take into account its relationship with the connection and rotation mechanism.

[0006] An object of the present invention is to provide a small-sized optical device while ensuring a sufficient board mounting area. [Means for solving the problem]

[0007] An optical device according to one aspect of the present invention comprises a first substrate having a main plane perpendicular to the optical axis direction of the optical system and having inner and outer diameters centered in the optical axis direction, a second substrate connected to the first substrate and having a main plane parallel to the optical axis direction, and a fixed tube for positioning the first substrate while restricting movement of the first substrate in the optical axis direction, wherein, when viewed in the optical axis direction, the connection portion between the first substrate and the second substrate is positioned such that the fixed tube does not overlap with a fixed portion for fixing a component other than the first substrate, and at least a portion of the fixed tube is located inside the outer diameter when viewed in the optical axis direction. Effect of the Invention

[0008] According to the present invention, it is possible to provide a small-sized optical device while ensuring a sufficient board mounting area. [Brief description of the drawings]

[0009] [Figure 1] 1 is an external view of a camera system according to a first embodiment. [Diagram 2] 1 is a block diagram showing a configuration of a camera system according to a first embodiment. [Diagram 3] FIG. 2 is a cross-sectional view of the camera system (retracted state) of the first embodiment. [Figure 4] FIG. 2 is a cross-sectional view of the camera system (extended state) of the first embodiment. [Diagram 5] 1 is a perspective view of a state in which a first substrate, a second substrate, and a third substrate of Example 1 are bonded together. FIG. [Figure 6] FIG. 2 is an explanatory diagram of the arrangement of first to third substrates in the first embodiment. [Figure 7] FIG. 2 is a perspective view of a linear guide barrel and a fixed barrel according to the first embodiment. [Figure 8] 4A to 4C are diagrams illustrating the state before and after the first substrate in the first embodiment is fixed to the fixed cylinder. [Figure 9] FIG. 11 is a cross-sectional view of a camera system (retracted state) according to a second embodiment. [Figure 10] FIG. 11 is a cross-sectional view of a camera system (extended state) according to a second embodiment. [Figure 11]FIG. 11 is an explanatory diagram of the arrangement of a first substrate and a second substrate in the second embodiment. [Figure 12] FIG. 11 is an explanatory diagram of the arrangement of the first and second substrates in the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to refer to the same components, and duplicated descriptions will be omitted. EXAMPLES

[0011] FIG. 1 is an external view of a camera system according to the present embodiment. FIG. 1(a) and FIG. 1(b) are views seen from the front side and the back side, respectively. The camera system includes an interchangeable lens (optical device) 101 and a digital camera (imaging device, hereinafter referred to as a camera body) 1 to which the interchangeable lens 101 is detachably attached. As shown in FIG. 1(a), the optical axis direction in which the optical axis of the imaging optical system housed in the interchangeable lens 101 extends is defined as the X-axis direction, and the directions perpendicular to this are defined as the Z-axis direction (horizontal direction) and the Y-axis direction (vertical direction). Hereinafter, the Z-axis direction and the Y-axis direction are collectively referred to as the Z / Y-axis direction. In addition, the rotation direction around the Z-axis is defined as the pitch direction, and the rotation direction around the Y-axis is defined as the yaw direction. The pitch direction and the yaw direction (hereinafter collectively referred to as the pitch / yaw direction) are rotation directions around two axes, the Z-axis and the Y-axis, which are perpendicular to each other. In each embodiment, an interchangeable lens is described as an example of an optical device, but the present invention is also applicable to other devices such as a lens-integrated camera.

[0012] As shown in FIG. 1(a), a grip portion 2 for a user to hold the camera body 1 in his / her hand is provided on the left side when viewed from the front (subject side) (right side when viewed from the rear).

[0013] A power supply operation unit 3 is disposed on the top surface of the camera body 1. When the user turns on the power supply operation unit 3 while the camera body 1 is in a power-off state, the camera body 1 is turned on and image capture is possible. When the user turns off the power supply operation unit 3 while the camera body 1 is in a power-on state, the camera body 1 is turned off.

[0014] Further, a mode dial 4, a release button 5, and an accessory shoe 6 are provided on the top surface of the camera body 1. The user can switch the imaging mode by rotating the mode dial 4. The imaging modes include a manual still image imaging mode in which the user can arbitrarily set imaging conditions such as shutter speed and aperture value, an auto still image imaging mode in which an appropriate exposure amount is automatically obtained, and a video imaging mode for capturing videos. The user can instruct imaging preparation operations such as autofocus and auto exposure control by pressing the release button 5 halfway, and can instruct imaging by pressing it all the way. Accessories such as an external flash and an external viewfinder (EVF) (not shown) are detachably attached to the accessory shoe 6.

[0015] The interchangeable lens 101 is mechanically and electrically connected to the camera mount 7 provided on the camera body 1 via the lens mount 102. As described above, the interchangeable lens 101 houses an imaging optical system that forms an image of a subject using light from the subject. The outer periphery of the interchangeable lens 101 is provided with a zoom ring 103 that can be rotated around an optical axis by a user operation. The outer periphery of the zoom ring 103 is provided with a knurled shape to prevent the user's hand from slipping when operating it. When the zoom ring 103 is rotated by the user, the zoom group that constitutes the imaging optical system moves to a predetermined optical position corresponding to the angle of the zoom ring 103. By such an operation, the user can take a picture at a desired angle of view. It should be noted that the zoom group includes a lens and a lens holding member that holds the lens.

[0016] As shown in FIG. 1(b), a rear operation unit 8 and a display unit 9 are provided on the rear of the camera body 1. The rear operation unit 8 includes a plurality of buttons and dials to which various functions are assigned. When the power of the camera 1 is on and a still image or video shooting mode is set, a through image of a subject image captured by an image sensor provided in the camera body 1 is displayed on the display unit 9. In addition, imaging parameters indicating imaging conditions such as shutter speed and aperture value are displayed on the display unit 9, and the user can change the setting values ​​of the imaging parameters by operating the rear operation unit 8 while viewing the display. The rear operation unit 8 includes a playback button for instructing playback of a recorded captured image, and the captured image is played back and displayed on the display unit 9 by the user operating the playback button.

[0017] 2 is a block diagram showing the electrical and optical configuration of the camera system. The camera body 1 has a power supply unit 10 that supplies power to the camera body 1 and the interchangeable lens 101, a power operation unit 3, a mode dial 4, a release button 5, a rear operation unit 8, and an operation unit 11 including a touch panel function of the display unit 9.

[0018] The camera body 1 and the interchangeable lens 101 as a whole system are controlled by a camera control unit 12 provided in the camera body 1 and a lens control unit 104 provided in the interchangeable lens 101 in cooperation with each other. The camera control unit 12 reads out and executes a computer program stored in the storage unit 13. At that time, the camera control unit 12 communicates various control signals, data, and the like with the lens control unit 104 via a communication terminal of an electrical contact 105 provided in the lens mount 102. The electrical contact 105 includes a power supply terminal that supplies power from the power supply unit 10 to the interchangeable lens 101.

[0019] The imaging optical system includes a zoom group 110 that is connected to the zoom operation ring 103 and moves in the optical axis direction to change the angle of view. The imaging optical system also includes a lens vibration isolation group 115 including a shift lens as an anti-shake element that reduces image blur. The lens vibration isolation group 115 performs an anti-shake operation to reduce image blur by moving (shifting) the shift lens in the Z / Y axis direction perpendicular to the optical axis. The imaging optical system also includes an aperture group 201 that performs a light amount adjustment operation, and a focus group 112 including a focus lens that moves in the optical axis direction to adjust the focus. The interchangeable lens 101 further includes an anti-shake driver 402 that drives the lens vibration isolation group 115 to shift the shift lens, an aperture driver 202 that drives the aperture group 201, and a focus driver 302 that drives the focus group 112 to move the focus lens. In FIG. 2, the focus group 112, the lens vibration isolation group 115, and the aperture group 201 are depicted separately from the zoom group 110, but are included in the zoom group 110 as described below.

[0020] The camera body 1 has a shutter unit 14, a shutter drive section 15, an image sensor 16, an image processing section 17, and a camera control section 12. The shutter unit 14 controls the amount of light collected by the imaging optical system in the interchangeable lens 101 and exposed by the image sensor 16. The image sensor 16 photoelectrically converts (captures) the subject image formed by the imaging optical system and outputs an image signal. The image processing section 17 performs various image processes on the image signal and then generates an image signal. The display section 9 displays the image signal (through image) output from the image processing section 17, displays imaging parameters, and plays back and displays captured images recorded in the memory section 13 or a recording medium (not shown).

[0021] The camera control unit 12 controls the driving of the aperture group 201 and the shutter unit 14 via the aperture drive unit 202 and the shutter drive unit 15 in accordance with the setting values ​​of the aperture value and the shutter speed received from the operation unit 11. The camera control unit 12 also controls the driving of the focus group 112 in accordance with an image capture preparation operation (half-press operation) on the operation unit 11 (release button 5).

[0022] For example, when an autofocus operation is instructed, the focus detection unit 18 determines the focus state of the subject image formed on the image sensor 16 based on the image signal generated by the image processing unit 17, generates a focus signal, and transmits it to the camera control unit 12. At the same time, the focus driving unit 302 detects the current position of the focus group 112, and transmits a signal related to the current position of the focus group 112 to the camera control unit 12 via the lens control unit 104. The camera control unit 12 compares the focus state of the subject image with the current position of the focus group 112, calculates the focus driving amount from the amount of deviation, and transmits it to the lens control unit 104. The lens control unit 104 drives and controls the focus group 112 to a target position via the focus driving unit 302, and corrects the focus deviation of the subject image.

[0023] Furthermore, when an automatic exposure control operation is instructed, the camera control unit 12 receives a luminance signal generated by the image processing unit 17 and performs a photometric calculation. Based on the photometric calculation result, the camera control unit 12 drives and controls the aperture group 201 in response to an image capture instruction operation (full press operation) on the operation unit 11 (release button 5). The camera control unit 12 also drives and controls the shutter unit 14 via the shutter drive unit 15, and performs an exposure process by the image sensor 16.

[0024] The camera body 1 has a pitch shake detection unit 19 and a yaw shake detection unit 20 as shake detection means capable of detecting image shake such as a user's hand shake. The pitch shake detection unit 19 and the yaw shake detection unit 20 respectively use an angular velocity sensor (vibration gyro) and an angular acceleration sensor to detect image shake in the pitch direction (rotation direction around the Z axis) and the yaw direction (rotation direction around the Y axis) and output a shake signal. The camera control unit 12 calculates the shift position of the lens vibration isolation group 115 (shift lens) in the Y axis direction using the shake signal from the pitch shake detection unit 19. Similarly, the camera control unit 12 calculates the shift position of the lens vibration isolation group 115 in the Z axis direction using the shake signal from the yaw shake detection unit 20. Then, the camera control unit 12 controls the drive of the lens vibration isolation group 115 to a target position according to the calculated shift position in the pitch / yaw direction, and performs vibration isolation operation to reduce image shake during exposure or during through image display.

[0025] The interchangeable lens 101 has a zoom operation ring 103 for changing the angle of view of the imaging optical system, and a zoom detection unit 106 for detecting the angle of the zoom operation ring 103. The zoom detection unit 106 is configured using, for example, a resistive linear potentiometer, and detects the angle of the zoom operation ring 103 operated by the user as an absolute value. Information on the angle of view detected by the zoom detection unit 106 is transmitted to the lens control unit 104, and is reflected in various controls by the camera control unit 12 described above.

[0026] Some of the above-mentioned various pieces of information are recorded in the storage unit 13 or a recording medium together with the captured image.

[0027] The positional relationship between the interchangeable lens 101 and the components in the camera body 1 will be described below with reference to Figures 3 and 4. Figures 3 and 4 are cross-sectional views of the camera system on an XY plane that includes the optical axis, and show the zoom retracted and extended states. Since the center line O approximately coincides with the optical axis determined by the imaging optical system, hereinafter it is synonymous with the optical axis.

[0028] In this embodiment, a seven-group zoom configuration is adopted as an example of an imaging optical system. Each zoom group that moves to a predetermined optical position according to the angle of view forms an image of a subject on the imaging surface of the imaging element 16 using light from the subject. The focus group 112 functions as a second zoom group, and the lens vibration isolation group 115 functions as a fifth zoom group. Furthermore, the imaging optical system includes a first zoom group 111, an aperture group 201, a third zoom group 113, a fourth zoom group 114, a sixth zoom group 116, and a seventh fixed group 117. Moreover, the zoom group 110 is composed of an object-side zoom group 110a and an imaging surface-side zoom group 110b. The object-side zoom group 110a includes the first zoom group 111. The image pickup surface side zoom group 110b includes a focus group 112, a third zoom group 113, a fourth zoom group 114, a lens vibration isolation group 115, a sixth zoom group 116, and an aperture group 201, which are linked together.

[0029] The configuration of the lens groups is not limited to that of this embodiment. For example, the lens vibration isolation group 115 may function as a third zoom group, or some of the lens groups may be fixed rather than movable.

[0030] The linear guide tube (guide tube) 107 is fixed to a fixed tube 109, and is fixed to the lens mount 102 via the fixed tube 109. Bayonet claws (not shown) are arranged at equal intervals on the outer circumferential surface of the linear guide tube 107. Meanwhile, a circumferential groove (not shown) is provided on the inner circumferential surface of the cam tube 108. Furthermore, the cam tube 108 is connected to the zoom operation ring 103. When the zoom operation ring 103 is rotated, the cam tube 108 rotates about the optical axis due to the engagement between the bayonet claws and the circumferential groove. The fixed tube 109 fixes the first substrate 500 in a state where movement of the first substrate 500 in the optical axis direction described later is restricted.

[0031] The linear guide barrel 107 is formed with linear guide grooves that restrict the movement of each zoom group in the rotation direction and guide the linear movement in the optical axis direction. The cam barrel 108 is formed with cam grooves that correspond to the object side zoom group 110a and the image plane side zoom group 110b and have trajectories at different angles in the rotation direction. The object side zoom group 110a and the image plane side zoom group 110b are each provided with a cam follower, and each cam follower engages with the corresponding linear guide groove and cam groove. When the user rotates the zoom operation ring 103, the cam barrel 108 rotates, and the cam follower engages with the linear guide groove and cam groove, causing the object side zoom group 110a and the image plane side zoom group 110b to advance and retreat along their respective trajectories in the optical axis direction.

[0032] 5 is a perspective view of a state in which a first substrate 500, a second substrate 600, and a third substrate 700 included in the lens control unit 104 are bonded together. Figures 5(a) and 5(b) are views seen from different viewpoints. The center line O is the optical axis.

[0033] The first substrate 500 has a main plane perpendicular to the optical axis. The second substrate 600 and the third substrate 700 have a main plane parallel to the optical axis and are disposed on the projection of the first substrate 500. The first joint 501 is a solder joint between the first substrate 500 and the second substrate 600. The second joint 502 is a solder joint between the first substrate 500 and the third substrate 700. The second substrate 600 and the third substrate 700 are joined to the surface of the first substrate 500 on the subject side. Note that the first substrate 500 and the second substrate 600 or the third substrate 700 only need to be electrically conductive, so these substrates may be bonded using a conductive resin.

[0034] Moreover, the first substrate 500 has a plurality of cutout portions 503. The plurality of cutout portions 503 have a shape that avoids a fastening portion between the fixed barrel 109 and the lens mount 102. The first joint portion 501 of the first substrate 500 and the second substrate 600 is not provided in the cutout portions 503. Therefore, the second substrate 600 and the third substrate 700 are arranged to avoid the cutout portions 503 in the optical axis direction.

[0035] The first screw hole 509 is disposed near the third substrate 700 (second joint 502) and is used to position and fix the first substrate 500 to the fixed tube 109. By disposing the second joint 502 near the positioning and fixing portion of the first substrate 500 and the fixed tube 109, it is possible to suppress bending of the first substrate 500 when dropped, etc., and to reduce the external force applied to the second joint 502 that causes poor electrical connection. The second screw hole 510 is used to position and fix the first substrate 500 to the fixed tube 109. In this embodiment, the second screw hole 510 is not disposed near the first joint 501, but it is preferable that it is disposed near the first joint 501. By disposing it near the first joint 501, it is possible to reduce the external force applied to the first joint 501. In this embodiment, the first screw hole 509 and a screw (not shown) that engages with the first screw hole 509 function as a positioning member. Similarly, second screw hole 510 and a screw (not shown) that engages with second screw hole 510 function as a positioning member.

[0036] In this embodiment, the first substrate 500 is fixed to the fixed tube 109 with screws, but it may be positioned via a cushioning material such as rubber. When the first substrate 500 is positioned to the fixed tube 109 via a cushioning material, the first substrate 500 does not have to be completely fixed to the fixed tube 109. By not completely fixing the first substrate 500, it is possible to reduce vibrations transmitted to each substrate via the fixed tube 109.

[0037] A microcomputer 505 is mounted on the main plane of the first substrate 500. An anti-vibration driving IC 601 that controls the anti-vibration driving unit 402 is mounted on the second substrate 600. An IC 701 for focus driving that controls the focus driving unit 302 is mounted on the third substrate 700.

[0038] The first substrate 500 has an arc shape, and a first substrate inner diameter 506, which is the inner diameter of the first substrate 500, and a first substrate outer diameter 507, which is the outer diameter of the first substrate 500, are concentric. The center is on the center line O. That is, a lens (optical element) included in the imaging optical system is disposed on the inner diameter of the first substrate 500. Note that the shape of the first substrate 500 does not need to be a perfect arc shape, and a part of the first substrate inner diameter 506 or the first substrate outer diameter 507 may be an irregular shape such as a straight line.

[0039] Moreover, first substrate width 508, which is the difference between the inner and outer diameters of first substrate 500, is desirably smaller than second substrate width 602, which is the contact length between second substrate 600 and first substrate 500, and third substrate width 702, which is the contact length between third substrate 700 and first substrate 500. Each substrate width must be wider than one side of an IC, which is an electrical element to be mounted.

[0040] Therefore, by mounting large electric elements on the second substrate 600 or the third substrate 700, it is possible to narrow the first substrate width 508. This makes it possible to shorten the first substrate outer diameter 507. Moreover, by mounting the microcomputer 505 on the second substrate 600, it is possible to further narrow the first substrate width 508 and further shorten the first substrate outer diameter 507.

[0041] Furthermore, soldering the first substrate 500 and the second substrate 600 together can reduce the space required to mount the connector compared to connector bonding, making it possible to miniaturize the camera system.

[0042] The arrangement of the first substrate 500, the second substrate 600, and the third substrate 700 will be described below.

[0043] Fig. 6 is an explanatory diagram of the arrangement of the first substrate 500, the second substrate 600, and the third substrate 700. Fig. 6(a) and Fig. 6(b) are a perspective view and an exploded perspective view of the first substrate 500, the second substrate 600, the third substrate 700, the fourth zoom group 114, the lens vibration isolation group 115, the sixth zoom group 116, and the seventh fixed group 117, respectively.

[0044] The fourth zoom group 114 includes a lens and a sixth barrel 140 that holds the lens. The sixth zoom group 116 includes a lens and a sixth barrel 160 that holds the lens. The sixth barrel 160 has cutouts 160a and 160b. The seventh fixed group 117 includes a lens and a seventh barrel 170 that holds the lens. The seventh barrel 170 has cutouts 170a and 170b. The second substrate 600 is disposed in the cutouts 160a and 170a. The third substrate 700 is disposed in the cutouts 160b and 170b.

[0045] Although the seventh lens barrel 170 does not move forward or backward in the optical axis direction, the sixth lens barrel 160 moves forward or backward in the optical axis direction in response to a zoom operation. Therefore, even when the sixth lens barrel 160 moves closest to the imaging surface side (image side), the sixth lens barrel 160 needs to secure a gap between the second substrate 600 and the third substrate 700.

[0046] Furthermore, when an external force such as a drop impact is applied and the second substrate 600 and the third substrate 700 come into contact with the surrounding components, the external force is applied to the first joint 501 and the second joint 502. Therefore, it is desirable to provide a gap of a predetermined value or more between the second substrate 600 and the third substrate 700 and the surrounding components in the substrate width direction, substrate thickness direction, and height direction. If it is difficult to ensure a gap of a predetermined value or more, for example, an elastic body (limiting member) 141 may be disposed between the third substrate 700 and the fourth lens barrel 140 in the optical axis direction. By sandwiching the third substrate 700 via the elastic material 141, the third substrate 700 does not come into contact with the surrounding components when dropped, so that the external force applied to the second joint 502 can be reduced.

[0047] FIG. 7(a) is a perspective view of the rectilinear guide tube 107. FIG. 7(b) is a perspective view of the fixed tube 109. The openings 107a and 107b are formed by cutting the ends of the rectilinear guide tube 107 toward the optical axis direction. The second substrate 600 is disposed in the opening 107a and the notch 109a of the fixed tube 109. The third substrate 700 is disposed in the opening 107b and the notch 109b of the fixed tube 109. As described above, it is desirable to provide a gap of a predetermined value or more between the second substrate 600 and the third substrate 700 and the surrounding components in the substrate width direction, substrate thickness direction, and height direction so that an external force is not applied to the first joint portion 501 or the second joint portion 502. Therefore, openings 107a, 107b and notches 109a, 109b are provided to provide a gap between the linear guide tube 107 and the fixed tube 109 adjacent to the outer diameter side of the second board 600 and the third board 700. By providing notches and openings in the fixed parts and movable parts in this way, the second board 600 and the third board 700 can be arranged in the optical axis direction of the first board 500. This makes it possible to arrange the first board 500 in the camera system with the second board 600 and the third board 700 joined to the main plane on the subject side. Therefore, it is possible to miniaturize the camera system while ensuring the board mounting area.

[0048] 8A and 8B are diagrams showing the state before and after the first substrate 500 is positioned and fixed to the fixed barrel 109. Fig. 8(a) is a diagram showing the completed assembly, and Fig. 8(b) is an exploded perspective view.

[0049] When viewed from the optical axis direction, the connection parts with the first substrate 500, such as the first joint part 501 and the second joint part 502, are arranged so as not to overlap with the fixing parts of the fixed barrel 109 for fixing components (such as the linear guide barrel 107 and the lens mount 102) different from the first substrate 500. In addition, when viewed from the optical axis direction, at least a part of the fixed barrel 109 is located inside the outer diameter 507 of the first substrate.

[0050] When the first substrate 500 is assembled into the fixed barrel 109, if the second substrate 600 and the third substrate 700 hit the fixed barrel 109 first, an external force is applied to the first joint 501 and the second joint 502, which causes a poor electrical connection. Therefore, the fixed barrel 109 is provided with guide pins (guide portions) 109c and 109d for assembly of the first substrate 500. The guide pins 109c and 109d are arranged so as to overlap with the second substrate 600 and the third substrate 700 in the direction perpendicular to the optical axis. The first substrate 500 is provided with guide holes 511a and 511b corresponding to the guide pins 109c and 109d. It is desirable that the length of the guide pins 109c and 109d is longer than the length of the second substrate 600 and the third substrate 700 in the optical axis direction. Since the length of the guide pins 109c, 109d is longer than the length of the second substrate 600 and the third substrate 700 in the optical axis direction, assembly is possible while maintaining a gap between the fixed barrel 109 and the second substrate 600 and the third substrate 700. Therefore, it is possible to assemble the first substrate 500 to the fixed barrel 109 while suppressing the generation of external force applied to the first joint portion 501 and the second joint portion 502.

[0051] In this embodiment, the lens control unit 104 includes the first substrate 500, the second substrate 600, and the third substrate 700, but the present invention is not limited to this. For example, the lens control unit 104 does not need to include the third substrate 700. EXAMPLES

[0052] The basic configuration of the camera system of this embodiment is the same as that of the camera system of embodiment 1. In this embodiment, only the configuration different from embodiment 1 will be described, and the same reference numerals will be used for the same parts as those of embodiment 1, and detailed description thereof will be omitted.

[0053] 9 and 10 are cross-sectional views of the camera system on the XY plane including the optical axis, showing the zoom retracted and extended states. The center line O is approximately the same as the optical axis determined by the imaging optical system, and is therefore hereinafter synonymous with the optical axis.

[0054] In this embodiment, a four-group zoom configuration is adopted as an example of an imaging optical system. The focus group 112, the lens vibration reduction group 115, and the aperture group 451 function as a third zoom group 253. Furthermore, the imaging optical system includes a first zoom group 251, a second zoom group 252, and a fourth zoom group 254. Note that the configuration of the lens groups is not limited to that of this embodiment. For example, the focus group 112 and the lens vibration reduction group 115 may function as the second zoom group. Also, some of the lens groups may not be movable but may be fixed.

[0055] The linear guide barrel 107 guides a movable barrel 118 that is movable in the optical axis direction, holds a cam barrel 108 that is rotatable around the optical axis direction, and houses a lens holding member that holds a lens. Cam grooves (not shown) are arranged at equal intervals on the outer circumferential surface of the linear guide barrel 107. Meanwhile, cam followers (not shown) are provided on the inner circumferential surface of the cam barrel 108. Furthermore, the cam barrel 108 is connected to the zoom operation ring 103. When the zoom operation ring 103 is rotated, the cam barrel 108 moves along the optical axis while rotating around the optical axis due to the engagement between the cam grooves and the cam followers.

[0056] The linear guide barrel 107 is formed with a linear guide groove (not shown) that restricts the movement of the second to fourth zoom groups 252-254 in the rotation direction and guides the linear movement in the optical axis direction. In addition, a linear key is formed on the outer periphery of the linear guide barrel 107 on the subject side, which restricts the movement of the first zoom group 251 in the rotation direction and guides the linear movement in the optical axis direction. In addition, the cam barrel 108 is formed with cam grooves having trajectories of different angles in the rotation direction corresponding to each zoom group. Meanwhile, the first to fourth zoom groups 251-254 are each provided with a cam follower (not shown). The cam follower provided in the first zoom group 251 engages with a cam groove 108a formed on the outer periphery of the cam ring 108. The cam followers provided in the second to fourth zoom groups 252-254 engage with a cam groove 108b formed on the inner periphery of the cam ring 108. When the user rotates the zoom operation ring 103, the cam barrel 108 rotates, and the cam followers provided on each zoom group engage with the linear guide grooves or the linear keys and cam grooves, causing each zoom group to simultaneously advance and retreat in the optical axis direction.

[0057] The arrangement of the first substrate 500 and the second substrate 610 will be described below. In the first embodiment, the second substrate 610 and the third substrate 700 are arranged by cutting out a part of the barrel that holds the fixed components and lenses in the interchangeable lens 1. On the other hand, in this embodiment, the second substrate 610 is arranged in openings provided in the linear guide barrel 107, the cam barrel 108, and the movable barrel 118. In other words, the barrel that holds the lenses is arranged so as not to overlap with the second substrate 610 in the radial direction.

[0058] Fig. 11 is an explanatory diagram of the arrangement of the first substrate 500 and the second substrate 610. Fig. 11(a) is a perspective view of the interchangeable lens 101 in which the first substrate 500 and the second substrate 610 are exposed. Fig. 11(b) is a perspective view of the cam barrel 108.

[0059] The opening 107c is formed by cutting out the end of the rectilinear guide tube 107 toward the optical axis direction. The opening 108c is formed by cutting out the end of the cam tube 108 toward the optical axis direction. As described above, the rectilinear guide tube 107 has a rectilinear guide groove (not shown). In addition, the cam grooves 108a and 108b functioning as moving parts are formed on the outer and inner circumferences of the cam tube 108, respectively. The cam followers provided in each zoom group engage with the rectilinear guide groove or the rectilinear key and the cam groove 108a or the cam groove 108b, so that each zoom group simultaneously advances and retreats in the optical axis direction, and therefore the grooves cannot be cut out. Therefore, the openings 107c and 108c need to be provided at positions that do not overlap with the rectilinear guide groove, the cam groove, and further the connecting members such as the cam followers. That is, the length of the second substrate 610 in the optical axis direction is shorter than the distance from the first joint 501 to the cam grooves 108a and 108b.

[0060] As described above, it is possible to provide openings at the ends of multiple movable cylinders and arrange the second board 610 with high spatial efficiency while maintaining the configuration required for lens drive. This allows the first board 500 to be arranged in the camera system with the second board 600 joined to the main plane on the subject side. Therefore, it is possible to miniaturize the camera system while ensuring the board mounting area. EXAMPLES

[0061] The basic configuration of the camera system of this embodiment is the same as that of the camera system of embodiment 1. In this embodiment, only the configuration different from embodiment 1 will be described, and the same reference numerals will be used for the same parts as those of embodiment 1, and detailed description thereof will be omitted.

[0062] FIG. 12 is an explanatory diagram of the arrangement of the first board 520 and the second board 620, and is a partial perspective view of the interchangeable lens 101 with the first board 520 exposed. The first board 520 is positioned and fixed to the fixed barrel 109 with screws. The contact portion 621 is attached to the lens mount 102 and is mechanically and electrically connected to the contact portion of the camera mount 7. This allows the interchangeable lens 101 to take pictures as part of the camera system. A flexible printed circuit board (flexible board) 622 electrically connects the first board 520 and the contact portion 621. Note that, instead of the flexible printed circuit board 622, other wiring means such as lead wires may be used as a means for electrically connecting the first board 520 and the contact portion 621.

[0063] In the interchangeable lens 101 of Examples 1 and 2, the second substrate is joined to the object side of the first substrate. On the other hand, in this example, the second substrate 620 is joined to the imaging surface side of the first substrate 520.

[0064] In this embodiment, the lens mount 102 is attached to an exterior member (not shown), and there is no need to provide a notch in the first board 520. Therefore, the second board 620 can be arranged anywhere on the surface of the first board 520 as long as it is a location that avoids the contact portion 621 and the flexible printed board 622. In other words, the second board 620 is arranged so as not to overlap with the contact portion 621 in either the optical axis direction or the radial direction. In the gap from the lens mount 102 to the fixed barrel 109, the second board 620 is joined to the first board 520. In this way, by efficiently utilizing the space, it is possible to miniaturize the camera system without increasing the overall lens length while ensuring the board mounting area.

[0065] The disclosure of this embodiment includes the following configuration. (Configuration 1) a first substrate having a principal plane perpendicular to an optical axis direction of the optical system and having an inner diameter and an outer diameter centered in the optical axis direction; a second substrate connected to the first substrate and having a main surface parallel to the optical axis direction; a fixed cylinder that positions the first substrate while restricting movement of the first substrate in the optical axis direction; When viewed from the optical axis direction, a connection portion between the first substrate and the second substrate is disposed so as not to overlap a fixing portion for fixing a component different from the first substrate to the fixed cylinder; 13. An optical device according to claim 12, wherein at least a portion of the fixed barrel is located inside the outer diameter when viewed from the optical axis direction. (Configuration 2) 2. The optical device according to configuration 1, further comprising a positioning member arranged near the connection portion for positioning the first substrate on the fixed barrel. (Configuration 3) 3. The optical device according to configuration 1 or 2, further comprising a limiting member that limits movement of the second substrate in the optical axis direction. (Configuration 4) The optical device described in any one of configurations 1 to 3, characterized in that the fixed barrel has a guide portion that guides the first substrate in the optical axis direction when the first substrate is attached to the fixed barrel. (Configuration 5) a cam barrel rotatable around the optical axis direction; a lens holding member disposed on an inner periphery of the cam barrel; a connecting member that connects the cam barrel and the lens holding member, The optical device described in any one of configurations 1 to 4, characterized in that the second substrate is arranged so as not to overlap with any of the cam barrel, the lens holding member, and the connecting member in either the optical axis direction or the radial direction. (Configuration 6) a cam barrel rotatable around the optical axis direction; a lens holding member disposed on an inner periphery of the cam barrel; a connecting member that connects the cam barrel and the lens holding member, the cam barrel includes a moving portion that moves the lens holding member or the connecting member in the optical axis direction, 6. The optical device according to any one of configurations 1 to 5, wherein the second substrate is disposed between the first substrate and the moving portion. (Configuration 7) Further comprising a movable cylinder movable in a direction parallel to the optical axis, 7. The optical device according to any one of configurations 1 to 6, wherein the second substrate is disposed so as to overlap the movable cylinder in the optical axis direction. (Configuration 8) a cam barrel rotatable around the optical axis direction, 8. The optical device according to any one of configurations 1 to 7, wherein the second substrate is disposed so as to overlap the cam barrel in the optical axis direction. (Configuration 9) The lens holding member further includes a lens holding member for holding the lens. The optical device according to any one of configurations 1 to 8, wherein the second substrate is arranged to overlap the lens holding member in the optical axis direction. (Configuration 10) The optical system further includes a guide cylinder that guides a movable cylinder that can move in a direction parallel to the optical axis direction, or that holds a cam cylinder that can rotate around the optical axis direction, or that houses a lens holding member that holds a lens; 10. The optical device according to any one of configurations 1 to 9, wherein the second substrate is disposed so as to overlap the guide tube in the optical axis direction. (Configuration 11) a control unit for controlling a lens is mounted on the second substrate; the second substrate is disposed on a projection of the first substrate; 11. The optical device according to any one of configurations 1 to 10, wherein the width of the first substrate is smaller than one side of the control unit. (Configuration 12) 12. The optical device according to any one of configurations 1 to 11, wherein an optical element is disposed on the inner diameter side of the first substrate. (Configuration 13) 13. The optical device according to any one of configurations 1 to 12, wherein the first substrate and the second substrate are solder-bonded. (Configuration 14) 14. The optical device according to any one of configurations 1 to 13, wherein the first substrate and the second substrate are bonded together by a conductive resin. (Configuration 15) a first substrate having a principal plane perpendicular to an optical axis direction of the optical system and having an inner diameter and an outer diameter centered in the optical axis direction; a second substrate connected to the first substrate and having a main surface parallel to the optical axis direction; a contact portion for electrically connecting the first substrate to an imaging device; a mount for mechanically connecting to the imaging device; An optical device characterized in that the second substrate is disposed between the first substrate and the mount and is positioned so as not to overlap with the contact portion in either the optical axis direction or the radial direction.

[0066] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention. [Explanation of symbols]

[0067] 101 Interchangeable lenses (optical equipment) 109 Fixed tube 500 First Substrate 501 First joint (connection) 600 Second Board

Claims

1. a first substrate having a principal plane perpendicular to an optical axis direction of the optical system and having an inner diameter and an outer diameter centered in the optical axis direction; a second substrate connected to the first substrate and having a main surface parallel to the optical axis direction; a fixed cylinder that positions the first substrate while restricting movement of the first substrate in the optical axis direction, a connection portion between the first substrate and the second substrate is disposed so as not to overlap a fixing portion for fixing a component different from the first substrate, when viewed from the optical axis direction, of the fixed cylinder; 13. An optical device according to claim 12, wherein at least a portion of the fixed barrel is located inside the outer diameter when viewed from the optical axis direction.

2. 2. The optical device according to claim 1, further comprising a positioning member arranged near the connection portion for positioning the first substrate on the fixed barrel.

3. 3. The optical device according to claim 1, further comprising a limiting member that limits movement of the second substrate in the optical axis direction.

4. 3. The optical device according to claim 1, wherein the fixed barrel includes a guide portion that guides the first substrate in the optical axis direction when the first substrate is attached to the fixed barrel.

5. a cam barrel rotatable around the optical axis direction; a lens holding member disposed on an inner periphery of the cam barrel; a connecting member that connects the cam barrel and the lens holding member, 3. The optical device according to claim 1, wherein the second substrate is arranged so as not to overlap with any of the cam barrel, the lens holding member, and the connecting member in either the optical axis direction or the radial direction.

6. a cam barrel rotatable around the optical axis direction; a lens holding member disposed on an inner periphery of the cam barrel; a connecting member that connects the cam barrel and the lens holding member, the cam barrel includes a moving portion that moves the lens holding member or the connecting member in the optical axis direction, 3. The optical device according to claim 1, wherein the second substrate is disposed between the first substrate and the moving portion.

7. Further comprising a movable cylinder movable in a direction parallel to the optical axis, 3. The optical device according to claim 1, wherein the second substrate is disposed so as to overlap the movable cylinder in the optical axis direction.

8. a cam barrel rotatable around the optical axis direction, 3. The optical device according to claim 1, wherein the second substrate is disposed so as to overlap the cam barrel in the optical axis direction.

9. The lens holding member further includes a lens holding member for holding the lens.

3. The optical device according to claim 1, wherein the second substrate is disposed so as to overlap the lens holding member in the optical axis direction.

10. The optical system further includes a guide cylinder that guides a movable cylinder that can move in a direction parallel to the optical axis direction, or that holds a cam cylinder that can rotate around the optical axis direction, or that houses a lens holding member that holds a lens; 3. The optical device according to claim 1, wherein the second substrate is disposed so as to overlap the guide barrel in the optical axis direction.

11. a control unit for controlling a lens is mounted on the second substrate, the second substrate is disposed on a projection of the first substrate; 3. The optical device according to claim 1, wherein the width of the first substrate is smaller than one side of the control portion.

12. 3. The optical device according to claim 1, wherein an optical element is disposed on the inner diameter side of the first substrate.

13. 3. The optical device according to claim 1, wherein the first substrate and the second substrate are solder-bonded.

14. 3. The optical device according to claim 1, wherein the first substrate and the second substrate are bonded together by a conductive resin.

15. a first substrate having a principal plane perpendicular to an optical axis direction of the optical system and having an inner diameter and an outer diameter centered in the optical axis direction; a second substrate connected to the first substrate and having a main surface parallel to the optical axis direction; a contact portion for electrically connecting the first substrate to an imaging device; a mount for mechanically connecting to the imaging device; An optical device characterized in that the second substrate is disposed between the first substrate and the mount and is disposed so as not to overlap with the contact portion in either the optical axis direction or the radial direction.

Images