Optical apparatus

Abstract

To provide a compact optical apparatus.SOLUTION: An optical apparatus (101) includes: a first substrate (500) which has a main flat surface perpendicular to an optical axis (O); second substrates (600, 700) which each have a main flat surface parallel to the optical axis (O); and flexible printed substrates (800, 900). The first substrate (500) and the second substrates (600, 700) are joined to each other. As viewed from an optical axis direction, the second substrates (600, 700) overlap with the flexible printed substrates (800, 900).SELECTED DRAWING: Figure 6

Description

[Technical field]

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

[0002] As functions such as autofocus and vibration isolation in optical devices such as interchangeable lenses improve, the scale of the control circuits mounted on the board inside the optical device increases, resulting in a larger board area. Patent Document 1 discloses an electric board mounting structure including 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]

[0003] [Patent Document 1] JP 2003-172863 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the structure disclosed in Patent Document 1, the electric boards cannot be arranged with good spatial efficiency, making it difficult to reduce the size of the optical device.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a compact optical device. [Means for solving the problem]

[0006] An optical device according to one aspect of the present invention comprises a first substrate having a main plane perpendicular to an optical axis, a second substrate having a main plane parallel to the optical axis, and a flexible printed circuit board, the first substrate and the second substrate being bonded to each other, and when viewed from the optical axis direction, the second substrate overlaps the flexible printed circuit board.

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

[0008] According to the present invention, a small-sized optical device can be provided. [Brief description of the drawings]

[0009] [Figure 1] 1 is an external view of an imaging system according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a block diagram of an imaging system according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a cross-sectional view (renormalized state) of the imaging system according to the present embodiment. [Figure 4] FIG. 2 is a cross-sectional view (extended state) of the imaging system according to the present embodiment. [Diagram 5] 2 is a perspective view showing a state in which a first substrate, a second substrate, and a third substrate are bonded together in the embodiment. FIG. [Figure 6] 2A and 2B are a rear view and a cross-sectional view of the interchangeable lens in the present embodiment with the first substrate exposed. [Figure 7] 2 is a perspective view of a first substrate, an image pickup surface side zoom group, and a linear guide barrel in the embodiment. FIG. [Figure 8] 5 is a detailed view of a fixing portion between a linear guide barrel and a flexible printed circuit board in the embodiment. FIG. [Figure 9] FIG. 2 is a perspective view of a first substrate, a zoom group, and a flexible printed circuit board in the embodiment. [Figure 10] 3A and 3B are a rear view and a cross-sectional view of a first substrate and a flexible printed circuit board in the embodiment. [Figure 11] 3A and 3B are a side view and a cross-sectional view of a first substrate and a flexible printed circuit board in the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In each drawing, the same reference numerals are used for the same components, and duplicated explanations will be omitted. Note that in this embodiment, an interchangeable lens (lens device) will be described as an example of an optical device, but this embodiment is not limited to this, and can be applied to other optical devices such as a lens-integrated camera.

[0011] 1(a) and (b) are external views of an image capture system (camera system) 100 in this embodiment, with Fig. 1(a) being a perspective view seen from the front side and Fig. 1(b) being a perspective view seen from the back side. The image capture system 100 is configured with a camera body (digital camera) 1 and an interchangeable lens (lens device, optical device) 101 that is detachable from the camera body 1.

[0012] 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 two directions that are perpendicular to the optical axis and perpendicular to each other 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 yaw direction (pitch / yaw direction) are the rotation directions around two axes, the Z axis and the Y axis, which are perpendicular to each other.

[0013] A grip section 2 is provided on the left side of the camera body 1 as viewed from the front (the subject side) (the right side as viewed from the rear) for the user to hold the camera body 1 with his / her hand. A power supply operation section 3 is also provided on the top surface of the camera body 1. When the user turns on the power supply operation section 3 while the camera body 1 is in the power-off state, the camera body 1 is turned on and image capture is possible. When the user turns off the power supply operation section 3 while the camera body 1 is in the power-on state, the camera body 1 is turned off.

[0014] 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 between imaging modes 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. In addition, the user can instruct imaging preparation operations such as autofocus and auto exposure control by half-pressing the release button 5, and can instruct imaging by fully pressing the button. Accessories such as an external flash and an external viewfinder (EVF), not shown, are detachably attached to the accessory shoe 6. In addition, an imaging element that photoelectrically converts (captures) a subject image formed by an imaging optical system in the interchangeable lens 101 is provided in the camera body 1.

[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 by focusing 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's 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. This allows the user to take a picture at a desired angle of view.

[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 imaging mode is set, a through image of a subject image captured by an imaging element is displayed on the display unit 9. The display unit 9 also displays imaging parameters indicating imaging conditions such as shutter speed and aperture value (F value), 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 imaging system 100. The camera body 1 has a power supply unit 10 that supplies power to the camera body 1 and the interchangeable lens 101, the power operation unit 3 described above, a mode dial 4, a release button 5, and an operation unit 11 that includes a rear operation unit 8 and a touch panel function of the display unit 9. 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.

[0018] The camera control unit 12 reads out and executes a computer program stored in the storage unit 13. In this case, 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 on the lens mount 102. The electrical contact 105 includes a power supply terminal that supplies power from the power supply unit 10 described above to the interchangeable lens 101.

[0019] The imaging optical system of the interchangeable lens 101 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, and a lens vibration isolation group 115 that includes 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 O. The imaging optical system also includes an aperture group (aperture diaphragm) 201 that performs a light amount adjustment operation, and a focus group 112 that is a moving lens group including a focus lens that moves in the optical axis direction to adjust the focus. The interchangeable lens 101 also 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.

[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 the camera control section 12 described above. The shutter unit 14 controls the amount of light collected by the image sensor 16 through the image sensor 16 and exposed to the light. The image sensor 16 has a CMOS (Complementary Metal-Oxide-Semiconductor) sensor or the like, and performs photoelectric conversion on the subject image (optical image) formed by the image sensor 16, 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 the image sensor parameters described above, or reproduces and displays the captured image 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 by 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 the signal 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. Then, 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 result of the photometric calculation, the camera control unit 12 controls the driving of the aperture group 201 in response to an image capture instruction operation (full press operation) on the operation unit 11 (release button 5). At the same time, the camera control unit 12 controls the driving of the shutter unit 14 via the shutter driving 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 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 ring 103. The zoom detection unit 106 detects the angle of the zoom ring 103 operated by the user as an absolute value, and is configured using, for example, a resistive linear potentiometer. 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. Meanwhile, part of the various pieces of information are recorded in the storage unit 13 or a recording medium together with the captured image.

[0026] Next, the positional relationship of the components of the imaging system 100 will be described with reference to Fig. 3 and Fig. 4. Fig. 3 and Fig. 4 are cross-sectional views of the imaging system 100 on the XY plane including the optical axis, with Fig. 3 showing the zoom retracted state of the interchangeable lens 101 and Fig. 4 showing the zoom extended state.

[0027] This embodiment employs a seven-group configuration as an example of an imaging optical system. Each zoom group that has moved to a predetermined optical position according to the angle of view forms an image of light from a subject on the imaging surface of the imaging element 16. At this time, the focus group 112 functions as a second zoom group, and the lens vibration isolation group 115 functions as a fifth zoom group. The imaging optical system also has 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.

[0028] The zoom group 110 of the imaging optical system has an object side zoom group 110a and an image plane side zoom group 110b. The object side zoom group 110a includes a first zoom group 111. The image plane side zoom group 110b includes a second zoom group 112, a third zoom group 113, a fourth zoom group 114, a fifth zoom group 115, a sixth zoom group 116, and an aperture group 201, which are connected to each other.

[0029] Note that this embodiment does not limit the configuration of the lens groups, and for example, the lens vibration isolation group 115 may function as a third zoom group. Also, some of the lens groups may not be movable but may be fixed.

[0030] The linear guide barrel 107 is fixed to a fixed barrel 109, and is a fixed part that is fixed to the lens mount 102 via the fixed barrel 109. Bayonet claws (not shown) are arranged at equal intervals on the outer circumferential surface of the linear guide barrel 107. Meanwhile, a circumferential groove (not shown) is 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 rotates about the optical axis due to the engagement between the bayonet claws and the circumferential groove.

[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. On the other hand, 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 moves the object side zoom group 110a and the image plane side zoom group 110b forward and backward in the optical axis direction along their respective trajectories by engaging with the linear guide groove and the cam groove.

[0032] 5(a) and (b) are perspective views showing a state in which a first substrate 500, a second substrate 600, and a third substrate 700 that constitute the lens control unit 104 are bonded together. Figures 5(a) and (b) show views seen from different viewpoints.

[0033] The first substrate 500 has a main plane that is approximately perpendicular to the optical axis O. The second substrate 600 has a main plane that is approximately parallel to the optical axis O. The third substrate 700 has a main plane that is approximately parallel to the optical axis O. Here, "approximately perpendicular" or "approximately parallel" is not limited to a configuration in which each substrate is strictly perpendicular or parallel to the optical axis O, but includes a configuration that is evaluated as being substantially perpendicular or parallel.

[0034] Reference numeral 501 denotes a first joint portion that joins the first substrate 500 and the second substrate 600 by solder. Reference numeral 502 denotes a second joint portion that joins the first substrate 500 and the third substrate 700 by solder. Reference numeral 503 denotes a first connector that is a connection portion with a flexible printed circuit board (not shown). The flexible printed circuit board will be described later. Reference numeral 504 denotes a second connector that is a connection portion with the flexible printed circuit board. Reference numeral 505 denotes a microcomputer that is an electric element.

[0035] Reference numeral 506 denotes a first substrate inner diameter, which is the inner diameter of the first substrate 500. Reference numeral 507 denotes a first substrate outer diameter, which is the outer diameter of the first substrate 500. Reference numeral 508 denotes a first substrate width, which corresponds to the difference (inner / outer diameter difference) between the outer diameter (first substrate outer diameter 507) and the inner diameter (first substrate inner diameter 506) of the first substrate 500 having the same center. Reference numeral 509 denotes a first screw hole for fixing the first substrate 500 to the inside of the interchangeable lens 101. Reference numeral 510 denotes a second screw hole for fixing the first substrate 500 to the inside of the interchangeable lens 101.

[0036] 2. Anti-vibration driving IC 601 is an electric element. Anti-vibration driving IC 601 is an electric element. Anti-vibration driving IC 602 is a second substrate width corresponding to the contact length between the second substrate 600 and the first substrate 500. Anti-vibration driving IC 701 is an electric element. Anti-vibration driving IC 701 is an electric element. Anti-vibration driving IC 702 is a third substrate width corresponding to the contact length between the third substrate 700 and the first substrate 500.

[0037] The first connector 503, the second connector 504, and the microcomputer 505 are mounted on the main plane of the first substrate 500. The first substrate inner diameter 506 and the first substrate outer diameter 507 have the same center (optical axis O). The first substrate 500 has an arc shape, and the substrate center is on the optical axis O of the lens which is an optical element. The second substrate 600 is mounted with an anti-vibration driving IC 601. The third substrate 700 is mounted with a focus driving IC 701. The first substrate width 508 is smaller than each of the second substrate width 602 and the third substrate width 702.

[0038] Each board width needs to be wider than one side of an IC, which is an electric element to be mounted. Therefore, by mounting a large electric element on the second board 600 or the third board 700, it is possible to narrow the first board width 508. As a result, it is possible to reduce the first board outer diameter 507. Furthermore, soldering the first board 500 and the second board 600 can reduce the space occupied by the connector required to mount the connector compared to connector joining. As a result, it is possible to realize a miniaturized interchangeable lens 101.

[0039] Fig. 6(a) is a rear view of the interchangeable lens 101 with the first substrate 500 exposed. Fig. 6(b) is a cross-sectional view taken along line AA in Fig. 6(a). 800 is a first flexible printed circuit board electrically connected to the vibration-proof driving unit 402 shown in Fig. 2. 801 is a first fixed portion where the first flexible printed circuit board 800 is fixed to the linear guide cylinder 107. 802 is a first moving portion that moves in accordance with the movement of the image pickup surface side zoom group 110b. 803 is a first bent portion of the first flexible printed circuit board 800.

[0040] 2. 901 is a second fixed portion where the second flexible printed circuit board 900 is fixed to the linear guide cylinder 107. 902 is a second moving portion that moves in accordance with the movement of the zoom group 110b. 903 is a second bent portion of the second flexible printed circuit board 900.

[0041] Reference numeral 1000 denotes a first board fixing screw that fixes the first board 500 to the fixed barrel 109. The first flexible printed board 800 is electrically connected to the first board 500 by a first connector 503. A control signal from the lens control unit 104 is output to the vibration isolation driving unit 402 via the first flexible printed board 800. The second flexible printed board 900 is electrically connected to the first board 500 by a second connector 504. A control signal from the lens control unit 104 is output to the focus driving unit 302 via the second flexible printed board 900.

[0042] The second substrate 600 is disposed on the inside of the first fixed portion 801 with respect to the optical axis O. In addition, the second substrate 600, the first fixed portion 801, and the first moving portion 802 are disposed substantially parallel to one another. This allows the second substrate 600 to be disposed in a space formed by the first fixed portion 801, the first bending portion 803, and the first moving portion 802, which will be described later. This allows the substrates to be disposed in a space-efficient manner, and the interchangeable lens 101 can be made more compact.

[0043] The third substrate 700 is disposed on the inside of the second fixed portion 901 with respect to the optical axis O. Moreover, the third substrate 700, the second fixed portion 901, and the second moving portion 902 are disposed substantially parallel to one another. This allows the third substrate 700 to be disposed in a gap formed by the second fixed portion 901, the second bending portion 903, and the second moving portion 902, which will be described later. This enables a substrate arrangement with good space efficiency, and makes it possible to reduce the size of the interchangeable lens 101.

[0044] As shown in Figures 6(a) and (b), the first substrate 500 is disposed in a dead space on the outer periphery of a lens (optical element) or a lens holding barrel (optical element holding barrel). This allows each substrate to be disposed in the barrel with good spatial efficiency, making it possible to realize a compact interchangeable lens 101. In addition, as shown in Figure 5(b), the compactness of the interchangeable lens 101 can also be realized by reducing the outer diameter 507 of the first substrate.

[0045] Fig. 7 is a perspective view of the first substrate 500, the image pickup surface side zoom group 110b, and the linear guide barrel 107. As shown in Fig. 7, a first flexible printed circuit board 800 connected to the first substrate 500 is disposed inside the linear guide barrel 107, and is connected to the vibration isolation driving unit 402 via the image pickup surface side zoom group 110b. As shown in Fig. 7, a second flexible printed circuit board 900 connected to the first substrate 500 is disposed inside the linear guide barrel 107, and is connected to the focus driving unit 302 via the image pickup surface side zoom group 110b.

[0046] 8(a) to (c) are detailed views of the fixing portion of the rectilinear guide tube 107 and the flexible printed circuit board (second flexible printed circuit board 900). FIG. 8(a) shows a perspective view of the second flexible printed circuit board 900, the rectilinear guide tube 107, the first substrate 500, and the third substrate 700 as viewed from inside the rectilinear guide tube 107. FIG. 8(b) shows a perspective view of the fixing portion of the second flexible printed circuit board 900 and the rectilinear guide tube 107 as viewed from inside the rectilinear guide tube 107. FIG. 8(c) shows a perspective view of the second flexible printed circuit board 900, the first substrate 500, and the third substrate 700 as viewed from inside the rectilinear guide tube 107.

[0047] Reference numeral 901a denotes an engagement portion of the second flexible printed circuit board 900 with the rectilinear guide tube 107. Reference numeral 902a denotes an engagement portion of the second flexible printed circuit board 900 with the zoom group 110. Reference numeral 107a denotes an engagement portion of the rectilinear guide tube 107. As shown in FIGS. 8(a) to 8(c), the engagement portion 901a of the second flexible printed circuit board 900 and the engagement portion 107a of the rectilinear guide tube 107 engage with each other, and the second fixed portion 901 is fixed to the rectilinear guide tube 107. As shown in FIG. 8(c), the second bent portion 903 is formed by folding back the extension portion of the second fixed portion 901 and extending it to the second moving portion 902. The first flexible printed circuit board 800 is configured similarly to the second flexible printed circuit board 900.

[0048] 9(a) and (b) are perspective views of the first substrate 500, the zoom group 110, and the flexible printed circuit board (the first flexible printed circuit board 800 and the second flexible printed circuit board 900). Fig. 9(a) is a diagram showing the retracted state of the image plane side zoom group 110b. Fig. 9(b) is a diagram showing the extended state of the image plane side zoom group 110b.

[0049] 9(a) and (b), a description will be given of a gap formed by the above-mentioned second fixed portion 901, second bent portion 903, and second moving portion 902. Reference numeral 904 denotes an excess portion formed between the engaging portion 902a of the second flexible printed circuit board 900 and the second bent portion 903. Reference numeral 804 denotes an excess portion of the first flexible printed circuit board 800 formed in the same configuration as the excess portion 904.

[0050] 9(a) and (b), the positions of the extra length portions 804 and 904 move. As a result, even if the image pickup surface side zoom group 110b moves, the first fixed portion 801 and the second fixed portion 901 do not expand or contract. As a result, it is possible to avoid failures due to breakage of the first fixed portion 801 and the second fixed portion 901.

[0051] On the other hand, the first bent portion 803 and the second bent portion 903 are necessary for the movement of the extra length portions 804 and 904. Therefore, a space is required for arranging the first flexible printed circuit board 800 and the second flexible printed circuit board 900 in the radial direction of the interchangeable lens 101. In addition, the first flexible printed circuit board 800 and the second flexible printed circuit board 900 extend in the optical axis direction so as to be able to follow the image pickup surface side zoom group 110b moving in the optical axis direction. In this embodiment, the second substrate 600 and the third substrate 700 are arranged in a gap formed by the second fixed portion 901, the second bent portion 903, and the second moving portion 902. At this time, the second substrate 600 is not in contact with the first moving portion 802, and the third substrate 700 is not in contact with the second moving portion 902. This configuration enables a substrate arrangement with good space efficiency, and the interchangeable lens 101 can be made compact.

[0052] Fig. 10(a) is a rear view of the first substrate 500, the first flexible printed circuit board 800, and the second flexible printed circuit board 900. Fig. 10(b) is a cross-sectional view taken along line BB in Fig. 10(a). Fig. 11(a) is a side view of the first substrate 500, the second substrate 600, the third substrate 700, the first flexible printed circuit board 800, and the second flexible printed circuit board 900. Fig. 11(b) is a cross-sectional view taken along line CC in Fig. 11(a). For ease of explanation, Figs. 10(a) and (b) will be explained together with Figs. 11(a) and (b).

[0053] As shown in Figs. 10(a) and 10(b) and Figs. 11(a) and 11(b), when viewed from the optical axis direction (on a projection plane perpendicular to the optical axis O), the second substrate 600 is disposed on the inside (closer to the optical axis O) of the first fixed portion 801 with respect to the optical axis O as the center. When viewed from the optical axis direction, the second substrate 600 is disposed so as to overlap with the first bent portion 803. When viewed from the optical axis direction, the second substrate 600 is disposed so as to overlap with the first moving portion 802. This allows the second substrate 600 to be disposed in the gap formed by the first fixed portion 801, the first bent portion 803, and the first moving portion 802. As a result, it is possible to dispose the second substrate 600 with good spatial efficiency.

[0054] As shown in FIG. 10(a), (b) and FIG. 11(a), (b), when viewed from the optical axis direction (on a projection plane perpendicular to the optical axis O), the third substrate 700 is disposed on the inside (closer to the optical axis O) of the second fixed portion 901 with respect to the optical axis O as the center. When viewed from the optical axis direction, the third substrate 700 is disposed so as to overlap with the second bent portion 903. When viewed from the optical axis direction, the third substrate 700 is disposed on the outside (farther from the optical axis O than the second moving portion 902) with respect to the optical axis O as the center. This allows the third substrate 700 to be disposed in the gap formed by the second fixed portion 901, the second bent portion 903, and the second moving portion 902. As a result, it becomes possible to dispose the third substrate 700 with good spatial efficiency.

[0055] With this configuration, even if the first substrate width 508 is reduced, it is possible to mount electrical elements such as ICs by utilizing the gap to place the second substrate 600 and the third substrate 700. Therefore, the first substrate width 508 can be reduced, and the interchangeable lens 101 can be made more compact.

[0056] 10(a), (b) and 11(a), (b), when viewed from the optical axis direction, the anti-vibration driving IC 601 is not disposed between the second substrate 600 and the first moving section 802. For example, the anti-vibration driving IC 601 is disposed between the second substrate 600 and the first fixed section 801. This makes it possible to reduce the clearance with the surrounding components in the event of a drop impact, compared to a case in which the anti-vibration driving IC 601 is disposed between the second substrate 600 and the first moving section 802. This improves space efficiency and makes it possible to realize a compact interchangeable lens 101.

[0057] In each embodiment, for example, the lens control unit 104 may be configured with the first substrate 500 and the second substrate 600 without using the third substrate 700. In each embodiment, the first substrate width 508 may be larger than the second substrate width 602 or the third substrate width 702. In each embodiment, the first flexible printed circuit board 800 or the second flexible printed circuit board 900 may be connected to a fixed lens group whose position in the optical axis direction is fixed. In each embodiment, the first substrate 500 does not have 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.

[0058] As described above, the optical device of this embodiment realizes a space-efficient arrangement and layout of the boards, and therefore, a compact optical device can be provided.

[0059] The disclosure of each embodiment includes the following configurations. (Configuration 1) A first substrate having a main plane perpendicular to an optical axis; a second substrate having a principal plane parallel to the optical axis; A flexible printed circuit board; the first substrate and the second substrate are bonded to each other; An optical device characterized in that, when viewed from the optical axis direction, the second substrate overlaps with the flexible printed circuit board. (Configuration 2) Further comprising a lens group that moves in the optical axis direction, 2. The optical device according to configuration 1, wherein the flexible printed circuit board is electrically connected to the lens group. (Configuration 3) 3. The optical device according to claim 1, wherein the flexible printed circuit board has a fixed portion, a movable portion, and a bending portion. (Configuration 4) The optical device according to configuration 3, wherein when viewed from the optical axis direction, the second substrate is disposed at a position closer to the optical axis than the fixed portion. (Configuration 5) 5. The optical device according to configuration 3 or 4, wherein the second substrate overlaps with the bent portion when viewed from the optical axis direction. (Configuration 6) 6. The optical device according to any one of configurations 3 to 5, wherein the second substrate overlaps with the moving portion when viewed from the optical axis direction. (Configuration 7) 6. The optical device according to any one of configurations 3 to 5, wherein, when viewed from the optical axis direction, the second substrate is disposed at a position farther from the optical axis than the moving portion. (Configuration 8) The optical device according to any one of configurations 3 to 7, wherein the second substrate is not in contact with the moving portion. (Configuration 9) The first substrate has a first substrate width corresponding to a difference between an outer diameter and an inner diameter having the same center, the second substrate has a second substrate width corresponding to a contact length with the first substrate, 9. The optical device according to any one of configurations 1 to 8, wherein the first substrate width is smaller than the second substrate width. (Configuration 10) 10. The optical device according to any one of configurations 1 to 9, wherein an electric element is mounted on the second substrate. (Configuration 11) 11. The optical device according to any one of configurations 1 to 10, wherein, when viewed from the optical axis direction, the first substrate is disposed on the outer periphery of an optical element or an optical element holding barrel. (Configuration 12) The optical device described in configuration 10, characterized in that when viewed from the optical axis direction, the electrical element is not disposed between the second substrate and the moving portion of the flexible printed circuit board. (Configuration 13) 13. The optical device according to any one of configurations 1 to 12, wherein the first substrate and the second substrate are joined to each other by solder. (Configuration 14) 14. The optical device according to any one of configurations 1 to 13, wherein the optical device is a lens device. (Configuration 15) 14. The optical device according to any one of configurations 1 to 13, wherein the optical device is an imaging device.

[0060] 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.

[0061] In this embodiment, two substrates (second substrate 600, third substrate 700) parallel to the optical axis are bonded to the first substrate 500, but the present invention is not limited to this. For example, only one substrate or three or more substrates may be bonded to the first substrate 500. The second substrate 600 and the third substrate 700 are interchangeable, and at least one of the two substrates may be referred to as the second substrate. [Explanation of symbols]

[0062] 101 Interchangeable lenses (optical equipment) 500 First board 600 Second board 700 Third board (second board) 800 First Flexible Printed Circuit Board (Flexible Printed Circuit Board) 900 Second flexible printed circuit board (flexible printed circuit board)

Claims

1. A first substrate having a main plane perpendicular to an optical axis; a second substrate having a principal plane parallel to the optical axis; A flexible printed circuit board; the first substrate and the second substrate are bonded to each other; An optical device characterized in that, when viewed from the optical axis direction, the second substrate overlaps with the flexible printed circuit board.

2. Further comprising a lens group that moves in the optical axis direction, 2. The optical device according to claim 1, wherein the flexible printed circuit board is electrically connected to the lens group.

3. 2. The optical device according to claim 1, wherein the flexible printed circuit board has a fixed portion, a moving portion, and a bending portion.

4. The optical device according to claim 3 , wherein, when viewed from the optical axis direction, the second substrate is disposed at a position closer to the optical axis than the fixed portion.

5. The optical device according to claim 3 , wherein the second substrate overlaps with the bent portion when viewed from the optical axis direction.

6. The optical device according to claim 3 , wherein the second substrate overlaps with the moving portion when viewed from the optical axis direction.

7. The optical device according to claim 3 , wherein, when viewed from the optical axis direction, the second substrate is disposed at a position farther from the optical axis than the moving portion.

8. The optical device according to claim 3 , wherein the second substrate is not in contact with the moving portion.

9. The first substrate has a first substrate width corresponding to a difference between an outer diameter and an inner diameter having the same center, the second substrate has a second substrate width corresponding to a contact length with the first substrate, 2. The optical device according to claim 1, wherein the first substrate width is smaller than the second substrate width.

10. 2. The optical device according to claim 1, wherein an electric element is mounted on the second substrate.

11. The optical device according to claim 1 , wherein, when viewed from the optical axis direction, the first substrate is disposed on an outer periphery of an optical element or an optical element holding barrel.

12. 11. The optical device according to claim 10, wherein when viewed from the optical axis direction, the electrical element is not disposed between the second substrate and a moving portion of the flexible printed circuit board.

13. 2. The optical device according to claim 1, wherein the first substrate and the second substrate are joined to each other by soldering.

14. 14. The optical device according to claim 1, wherein the optical device is a lens device.

15. 14. The optical device according to claim 1, wherein the optical device is an imaging device.

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