Optical apparatus

Abstract

[Problem] To provide an optical device that is miniaturized while ensuring a substrate mounting area. [Solution] An optical device comprises: a first substrate having a main plane orthogonal to the optical axis direction of an optical system, and having an inner diameter and an outer diameter, both centered on 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 fixing cylinder that positions the first substrate while restricting movement of the first substrate in the optical axis direction; and a connection portion between the first substrate and the second substrate arranged so as not to overlap with a fixing portion for fixing a component different from the first substrate to the fixing cylinder when viewed from the optical axis direction. When viewed from the optical axis direction, at least a portion of the fixed tube is located inside the outer diameter.

Description

Technical Field

[0001] This invention relates to optical devices. Background Technology

[0002] In recent years, due to their complex functions, the size of optical devices such as digital cameras, camcorders and interchangeable lenses has tended to increase with the increase in the size of the control loops mounted on the main board, and the area of ​​the main board (i.e., the width of the main board) has tended to increase.

[0003] Patent Document 1 discloses a circuit board mounting structure for interchangeable lenses, which provides flexibility in ensuring the board mounting area without increasing the width of the main substrate. More specifically, it discloses a circuit board mounting structure comprising at least one rigid substrate approximately orthogonal to the optical axis, at least one rigid substrate approximately parallel to the optical axis, and a board-to-board connector connecting the two rigid substrates.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2003-172863 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] However, Patent Document 1 does not disclose constraints on the components surrounding the rigid substrate disposed within the interchangeable lens. In particular, the zoom lens includes a connecting and rotating mechanism to move the cylinder back and forth in the optical axis direction in relation to changes in magnification, and the arrangement of the rigid substrate can be determined based on its relationship with the connecting and rotating mechanism.

[0009] The purpose of this invention is to provide an optical device that has a miniaturized size and can ensure sufficient substrate mounting area.

[0010] Solution for solving the problem

[0011] An optical device according to one aspect of the invention may include: a first substrate having a principal plane orthogonal to the optical axis of the optical system, and the first substrate having an inner diameter and an outer diameter, each of which is centered on the optical axis; a second substrate connected to the first substrate and having a principal plane parallel to the optical axis; a fixing cylinder positioning the first substrate while restricting movement of the first substrate in the optical axis direction; and a connection between the first substrate and the second substrate, which, when viewed from the optical axis direction, is arranged not to overlap with a fixing portion for fixing a component different from the first substrate to the fixing cylinder. When viewed from the optical axis direction, at least a portion of the fixing cylinder is located inside the outer diameter.

[0012] The effects of the invention

[0013] The present invention can provide an optical device with a miniaturized size and sufficient substrate mounting area. Attached Figure Description

[0014] Figure 1 An external view of the camera system according to the first embodiment is shown.

[0015] Figure 2 This is a block diagram illustrating the construction of a camera system according to the first embodiment.

[0016] Figure 3 This is a cross-sectional view of the camera system (in the retracted state) according to the first embodiment.

[0017] Figure 4 This is a cross-sectional view of the camera system (in the extended state) according to the first embodiment.

[0018] Figure 5 A perspective view of a first substrate, a second substrate, and a third substrate in a bonded state according to a first embodiment is shown.

[0019] Figure 6 The arrangement of the first to third substrates according to the first embodiment is described.

[0020] Figure 7 A perspective view of the straight-through guide tube and the fixed tube according to the first embodiment is shown.

[0021] Figure 8 The images show the state before and after the first substrate is fixed to the fixing cylinder in the first embodiment.

[0022] Figure 9 This is a cross-sectional view of the camera system (in the retracted state) according to the second embodiment.

[0023] Figure 10 This is a cross-sectional view of the camera system (in the extended state) according to the second embodiment.

[0024] Figure 11 The configuration of the first substrate and the second substrate according to the second embodiment is described.

[0025] Figure 12 The configuration of the first substrate and the second substrate according to the third embodiment is described. Detailed Implementation

[0026] A detailed description of embodiments of the invention will now be given with reference to the accompanying drawings. Corresponding elements in the various drawings will be denoted by the same reference numerals, and repeated descriptions will be omitted.

[0027] First Implementation Method

[0028] Figure 1 An external view of the camera system according to this embodiment is shown. Figure 1 (a) and Figure 1 (b) shows the front and rear stereoscopic views, respectively. The camera system includes an interchangeable lens (optical device) 101 and a digital camera (video recording device, hereinafter referred to as the camera body) 1, with the interchangeable lens 101 detachably attached to the digital camera 1. Figure 1 As shown in (a), the optical axis direction along which the optical axis of the imaging optical system housed in the interchangeable lens 101 extends will be defined as the X-axis direction, and directions orthogonal to the X-axis direction will be 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 will also be collectively referred to as the Z / Y-axis direction. The rotational direction about the Z-axis will be defined as the pitch direction, and the rotational direction about the Y-axis will be defined as the yaw direction. The pitch direction and the yaw direction (hereinafter also collectively referred to as pitch / yaw directions) are rotational directions about two mutually orthogonal axes (the Z-axis and the Y-axis). In each embodiment, the interchangeable lens is described as an example of an optical device, but this disclosure is also applicable to other devices, such as lens-integrated cameras.

[0029] like Figure 1 As shown in (a), when viewed from the front (subject side), a gripping part 2 for the user to hold the camera body 1 is provided on the left side of the camera body 1 (the right side when viewed from the rear).

[0030] The power operation unit 3 is disposed on the top surface of the camera body 1. When the camera body 1 is in the power-off state, the user can turn on the power by operating the power operation unit 3, thereby enabling imaging. When the camera body 1 is in the power-on state, the user can turn off the power by operating the power operation unit 3.

[0031] Mode dial 4, release button 5, and accessory socket 6 are located on the top surface of the camera body 1. The user can switch imaging modes by rotating mode dial 4. Imaging modes include manual still image shooting mode, where the user can arbitrarily set imaging conditions such as shutter speed and aperture value; automatic still image shooting mode, which automatically obtains appropriate exposure; and motion image shooting mode, used for shooting moving images. By half-pressing release button 5, the user can instruct the camera to perform imaging preparation operations such as autofocus and automatic exposure control; and by fully pressing it, the user can instruct the camera to capture an image. Accessories, such as external flash and external viewfinder (EVF), not shown, can be detachably attached to accessory socket 6.

[0032] 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 uses light from the subject to form an image of the subject. A zoom operation ring 103, which can be rotated about the optical axis by user operation, is provided on the outer periphery of the interchangeable lens 101. The outer periphery of the zoom operation ring 103 is provided with a knurled shape to prevent the user's hand from slipping during operation. When the user rotates the zoom operation ring 103, the zoom unit constituting the imaging optical system moves to a predetermined optical position corresponding to the angle of the zoom operation ring 103. This operation allows the user to capture an image at a desired angle. The zoom unit includes a lens and a lens holding member for holding the lens.

[0033] like Figure 1 As shown in (b), a rear operation unit 8 and a display unit 9 are provided on the back of the camera body 1. The rear operation unit 8 includes multiple buttons and dials, and multiple functions are assigned to these buttons and dials. When the camera 1 is powered on and a still or moving image shooting mode is set, the display unit 9 displays a real-time image of the subject captured by the image sensor provided in the camera body 1. The display unit 9 displays imaging parameters indicating imaging conditions such as shutter speed and aperture 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 indicating the playback of recorded images, and when the user operates the playback button, the captured image is displayed on the display unit 9.

[0034] Figure 2 This is a block diagram showing the electrical and optical construction of the camera system. The camera body 1 includes a power supply unit 10 that supplies power to the camera body 1 and the interchangeable lens 101, and an operation unit 11 that includes a power operation switch 3, a mode dial 4, a release button 5, a rear operation unit 8, and a display unit 9 with touch panel functionality.

[0035] The overall system control of the camera body 1 and the interchangeable lens 101 is performed by a camera control unit 12 disposed in the camera body 1 and a lens control unit 104 disposed in the interchangeable lens 101, which communicate with each other. The camera control unit 12 reads and executes a computer program stored in the memory 13. At this time, the camera control unit 12 communicates with the lens control unit 104 via a communication terminal of an electrical contact 105 disposed on the lens mount 102, thereby communicating various control signals and data. The electrical contact 105 includes a power terminal for supplying power from the power supply unit 10 to the interchangeable lens 101.

[0036] The imaging optical system includes a zoom unit 110 connected to a zoom operation ring 103 and movable along the optical axis to change the viewing angle. The imaging optical system also includes a lens image stabilization (IS) unit 115, which includes a shift lens (image stabilizing lens) as an image stabilizing element to reduce image blur. The lens IS unit 115 performs image stabilization by moving (shifting) the shift lens along the Z / Y axis, which is orthogonal to the optical axis, to reduce image blur. The imaging optical system also includes an aperture (stop) unit 201 that performs light amount adjustment and a focusing unit 112 including a focusing lens that moves along the optical axis to perform focusing. The interchangeable lens 101 includes an IS drive unit 402 that drives the lens IS unit 115 to shift the shift lens, an aperture drive unit 202 that drives the aperture unit 201, and a focusing drive unit 302 that drives the focusing unit 112 to move the focusing unit 112. Figure 2 In the diagram, the focusing unit 112, the lens IS unit 115, and the aperture unit 201 are shown separately from the zoom unit 110, but as described below, they are included in the zoom unit 110.

[0037] The camera body 1 includes a shutter unit 14, a shutter drive unit 15, an image sensor 16, an image processing unit 17, and a camera control unit 12. The shutter unit 14 controls the amount of light focused by the imaging optics system in the interchangeable lens 101 and exposed to the image sensor 16. The image sensor 16 performs photoelectric conversion (imaging) on ​​the subject image formed by the imaging optics system and outputs an imaging signal. The image processing unit 17 performs various image processing operations on the imaging signal and then generates an image signal. The display unit 9 displays the image signal (real-time image) output from the image processing unit 17, displays imaging parameters, and plays back and displays captured images recorded in the memory 13 or a recording medium (not shown).

[0038] The camera control unit 12 controls the driving of the aperture unit 201 and the shutter unit 14 via the aperture drive unit 202 and the shutter drive unit 15, respectively, based on the aperture value and shutter speed settings received from the operation unit 11. The camera control unit 12 also controls the driving of the focusing unit 112 based on the imaging preparation operation (half-press operation) on the operation unit 11 (release button 5).

[0039] For example, when AF operation is indicated, the focus detector 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. Simultaneously, the focus drive unit 302 detects the current position of the focus unit 112 and transmits a signal regarding the current position of the focus unit 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 unit 112, calculates the shift amount, and transmits the focus drive amount to the lens control unit 104. The lens control unit 104 drives and controls the focus unit 112 to the target position via the focus drive unit 302, correcting the defocus of the subject image.

[0040] When AE control operation is instructed, camera control unit 12 receives the brightness signal generated by image processing unit 17 and performs metering (photometry) calculation. Based on the metering calculation result, camera control unit 12 drives and controls aperture unit 201 according to imaging command operation (full press operation) on operation unit 11 (release button 5). Camera control unit 12 drives and controls shutter unit 14 via shutter drive unit 15 to perform exposure processing through image sensor 16.

[0041] The camera body 1 has a pitch shake detector 19 and a yaw shake detector 20, which are shake detectors capable of detecting image shake such as camera shake caused by the user. Both the pitch shake detector 19 and the yaw shake detector 20 use angular velocity sensors (vibration gyroscopes) or angular acceleration sensors to detect image shake in the pitch direction (rotation direction about the Z-axis) and the yaw direction (rotation direction about the Y-axis) and output shake signals. The camera control unit 12 uses the shake signal from the pitch shake detector 19 to calculate the displacement position of the lens IS unit 115 (shift lens) in the Y-axis direction. Similarly, the camera control unit 12 uses the shake signal from the yaw shake detector 20 to calculate the displacement position of the lens IS unit 115 in the Z-axis direction. Then, the camera control unit 12 drives and controls the lens IS unit 115 to the target position according to the calculated displacement position in the pitch / yaw direction, performing image stabilization to reduce image blur during exposure and live image display.

[0042] The interchangeable lens 101 includes a zoom operation ring 103 for changing the viewing angle of the imaging optics system and a zoom detector 106 for detecting the angle of the zoom operation ring 103. The zoom detector 106 uses, for example, a resistive linear potentiometer and detects the angle of the zoom operation ring 103 operated by the user in absolute value. The viewing angle information detected by the zoom detector 106 is transmitted to the lens control unit 104 and reflected in the various controls performed by the camera control unit 12 described above.

[0043] Some of the aforementioned types of information are recorded together with the captured images in memory 13 and recording medium.

[0044] Now for reference Figure 3 and Figure 4 This will provide a description of the positional relationship between the components in the interchangeable lens 101 and the camera body 1. Figure 3 and Figure 4 This is a cross-sectional view of the camera system on the XY plane, including the optical axis, showing the zoom lens in its retracted and extended states. The center line O essentially coincides with the optical axis determined by the imaging optics system; therefore, it will be considered synonymous with the optical axis below.

[0045] This embodiment uses a seven-unit zoom structure as an example of an imaging optical system. Each zoom unit moves to a predetermined optical position according to the viewing angle, using light from the subject to form an image of the subject on the imaging surface of the image sensor 16. The focusing unit 112 serves as the second zoom unit, and the lens IS unit 115 serves as the fifth zoom unit. The imaging optical system includes a first zoom unit 111, an aperture unit 201, a third zoom unit 113, a fourth zoom unit 114, a sixth zoom unit 116, and a seventh fixed unit 117. The zoom unit 110 includes a subject-side zoom unit 110a and an image-side zoom unit 110b. The subject-side zoom unit 110a includes the first zoom unit 111. The image-side zoom unit 110b includes the focusing unit 112, the third zoom unit 113, the fourth zoom unit 114, the lens IS unit 115, the sixth zoom unit 116, and the aperture unit 201, and is constructed by connecting them.

[0046] The lens unit can be constructed in ways not limited to those described in this embodiment. For example, the lens IS unit 115 can be used as a third zoom unit, or a portion of the lens unit can be fixed rather than movable.

[0047] The straight-in guide tube 107 is fixed to the fixing tube 109, and then fixed to the lens mount 102 via the fixing tube 109. On the outer peripheral surface of the straight-in guide tube 107, bayonet claws (not shown) are arranged at equally spaced positions. On the other hand, a circumferential groove (not shown) is provided on the inner peripheral surface of the cam tube 108. The cam tube 108 is connected to the zoom operating ring 103. When the zoom operating ring 103 rotates, the cam tube 108 rotates around the optical axis due to the engagement of the bayonet claws and the circumferential groove. The fixing tube 109 fixes the first substrate 500 and restricts its movement in the optical axis direction, as described below.

[0048] The linear guide cylinder 107 has a linear guide groove that restricts the movement of each zoom unit in the rotational direction and guides its linear movement in the optical axis direction. The cam cylinder 108 also has cam grooves corresponding to the subject-side zoom unit 110a and the image-side zoom unit 110b, each cam groove having a trajectory with a different angle in the rotational direction. Each of the subject-side zoom unit 110a and the image-side zoom unit 110b includes 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 cylinder 108 rotates, and the cam follower engages with the linear guide groove and cam groove, causing the subject-side zoom unit 110a and the image-side zoom unit 110b to move back and forth along their respective trajectories in the optical axis direction.

[0049] Figure 5 It is a perspective view of the first substrate 500, the second substrate 600 and the third substrate 700 in the lens control unit 104 in an engaged state. Figure 5 (a) and Figure 5 (b) is a diagram viewed from different viewpoints. The center line O is the optical axis.

[0050] The first substrate 500 has a principal plane orthogonal to the optical axis. The second substrate 600 and the third substrate 700 have principal planes parallel to the optical axis and are located on the projection of the first substrate 500. The first joint 501 is a welding joint between the first substrate 500 and the second substrate 600. The second joint 502 is a welding joint between the first substrate 500 and the third substrate 700. The second substrate 600 and the third substrate 700 are bonded to the subject-side surface of the first substrate 500. The first substrate 500 and the second substrate 600 or the third substrate 700 can be conductive, therefore these substrates can be bonded using conductive resin.

[0051] The first substrate 500 includes a plurality of notches 503. The plurality of notches 503 are shaped to avoid the fastening portions of the retaining cylinder 109 and the lens mounting base 102. The first joint portion 501 between the first substrate 500 and the second substrate 600 is not provided in the notches 503. Therefore, the second substrate 600 and the third substrate 700 are positioned to avoid the notches 503 in the optical axis direction.

[0052] The first screw hole 509 is located near the third substrate 700 (second joint 502) and is used to position and fix the first substrate 500 to the fixing cylinder 109. Placing the second joint 502 near the positioning and fixing portions of the first substrate 500 and the fixing cylinder 109 can suppress bending of the first substrate 500 during drops or other impacts and reduce the external force applied to the second joint 502 (which may lead to electrical connection failure). The second screw hole 510 is used to position and fix the first substrate 500 to the fixing cylinder 109. In this embodiment, the second screw hole 510 is not located near the first joint 501, but it can be located near the first joint 501. Placing it near the first joint 501 can reduce the external force applied to the first joint 501. In this embodiment, the first screw hole 509 and the screw (not shown) engaging with the first screw hole 509 serve as positioning members. Similarly, the second screw hole 510 and the screw (not shown) engaging with the second screw hole 510 serve as positioning members.

[0053] In this embodiment, the first substrate 500 is fixed to the fixing cylinder 109 using screws, but it can also be positioned using a cushioning material such as rubber. When the first substrate 500 is positioned on the fixing cylinder 109 using a cushioning material, the first substrate 500 may not be completely fixed to the fixing cylinder 109. Incomplete fixation can reduce vibrations transmitted to each substrate via the fixing cylinder 109.

[0054] A microcomputer 505 is mounted on the main plane of a first substrate 500. A second substrate 600 includes an IS driver IC 601 that controls an IS drive unit 402. A third substrate 700 includes a focus drive IC 701 that controls a focus drive unit 302.

[0055] The first substrate 500 has an arcuate shape, and the inner diameter 506 and the outer diameter 507 of the first substrate 500 share the same center. This center is located on the centerline O. That is, the lens (optical element) included in the imaging optical system is arranged within the inner diameter of the first substrate 500. The shape of the first substrate 500 does not have to be a perfect arcuate shape; a portion of the inner diameter 506 and the outer diameter 507 of the first substrate can have different shapes, such as straight lines.

[0056] The width 508 of the first substrate (which is the difference between the inner and outer diameters of the first substrate 500) can be smaller than each of the width 602 of the second substrate (which is the contact length between the second substrate 600 and the first substrate 500) and the width 702 of the third substrate (which is the contact length between the third substrate 700 and the first substrate 500). Each substrate width can be wider than one side of the IC, which is an electrical component to be mounted.

[0057] Therefore, mounting large electrical components on the second substrate 600 and the third substrate 700 can reduce the width 508 of the first substrate. This, in turn, can reduce the outer diameter 507 of the first substrate. Mounting the microcomputer 505 on the second substrate 600 can further reduce the width 508 of the first substrate and further reduce the outer diameter 507 of the first substrate.

[0058] Compared to joining the connector, welding the first substrate 500 and the second substrate 600 together reduces the space required to mount the connector and allows for miniaturization of the camera system.

[0059] The configuration of the first substrate 500, the second substrate 600 and the third substrate 700 will be described below.

[0060] Figure 6 The configuration of the first substrate 500, the second substrate 600 and the third substrate 700 is described. Figure 6 (a) and Figure 6 (b) are perspective views and exploded perspective views of the first substrate 500, the second substrate 600, the third substrate 700, the fourth zoom unit 114, the lens IS unit 115, the sixth zoom unit 116 and the seventh fixing unit 117, respectively.

[0061] The fourth zoom unit 114 includes a lens and a sixth barrel 140 for holding the lens. The sixth zoom unit 116 includes a lens and a sixth barrel 160 for holding the lens. The sixth barrel 160 has notches 160a and 160b. The seventh fixing unit 117 includes a lens and a seventh barrel 170 for holding the lens. The seventh barrel 170 has notches 170a and 170b. The second substrate 600 is located in the notches 160a and 170a. The third substrate 700 is located in the notches 160b and 170b.

[0062] The seventh cylinder 170 does not move back and forth in the optical axis direction, but the sixth cylinder 160 moves back and forth in the optical axis direction according to the zoom operation. Therefore, even when the sixth cylinder 160 moves to be closest to the imaging surface (image), the sixth cylinder 160 can maintain the gap between itself and the second substrate 600 and the third substrate 700.

[0063] 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 surrounding components, the external force will be applied to the first joint 501 and the second joint 502. Therefore, a predetermined value or greater gap can be provided 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. For example, if it is difficult to ensure a predetermined value or greater gap, an elastic body (restricting member) 141 can be arranged between the third substrate 700 and the fourth cylinder 140 along the optical axis direction. By clamping the third substrate 700 via the elastic material 141, the third substrate 700 does not come into contact with surrounding components during a drop, thus reducing the external force applied to the second joint 502.

[0064] Figure 7 (a) is a perspective view of the straight-in guide tube 107. Figure 7 (b) is a perspective view of the fixing cylinder 109. Openings 107a and 107b are formed by cutting off the ends of the straight-through guide cylinder 107 along the optical axis. The second substrate 600 is disposed in the opening 107a and the notch 109a of the fixing cylinder 109. The third substrate 700 is disposed in the opening 107b and the notch 109b of the fixing cylinder 109. As described above, in order to prevent external forces from being applied to the first joint 501 and the second joint 502, a predetermined value or greater gap can be provided 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. Therefore, openings 107a and 107b and notches 109a and 109b are provided to create a gap between the straight-through guide cylinder 107 and the fixing cylinder 109 adjacent to the outer diameter of the second substrate 600 and the third substrate 700. Therefore, by providing notches and openings in the fixed and movable portions, the second substrate 600 and the third substrate 700 can be arranged along the optical axis direction of the first substrate 500. This allows the first substrate 500 to be placed within the camera system, wherein the second substrate 600 and the third substrate 700 are bonded to the main plane on the subject side. Thus, the camera system can be miniaturized while ensuring substrate mounting area.

[0065] Figure 8 The images show the state of the first substrate 500 before and after it is positioned and fixed to the fixing cylinder 109. Figure 8 (a) shows the completed assembly diagram. Figure 8 (b) is a decomposed stereograph.

[0066] When viewed from the optical axis, the connection portions to the first substrate 500 (such as the first joint portion 501 and the second joint portion 502) are configured not to overlap with the fixing portions used to fix components different from the first substrate 500 (e.g., the straight guide tube 107 and the lens mount 102, etc.) to the fixing tube 109. When viewed from the optical axis, at least a portion of the fixing tube 109 is located within the outer diameter 507 of the first substrate.

[0067] When the first substrate 500 is attached to the fixing cylinder 109, if the second substrate 600 and the third substrate 700 first come into contact with the fixing cylinder 109, an external force will be applied to the first joint 501 and the second joint 502, resulting in an electrical connection failure. Therefore, the fixing cylinder 109 includes guide pins (guide portions) 109c and 109d for attaching the first substrate 500. The guide pins 109c and 109d are configured to overlap with the second substrate 600 and the third substrate 700 in a direction orthogonal to the optical axis (orthogonal direction of the optical axis). The first substrate 500 has guide holes 511a and 511b corresponding to the guide pins 109c and 109d. The lengths of the guide pins 109c and 109d in the optical axis direction may be longer than the lengths of the second substrate 600 and the third substrate 700 in the optical axis direction. By making the guide pins 109c and 109d longer in the optical axis direction than the second substrate 600 and the third substrate 700 in the optical axis direction, assembly can be achieved while maintaining the gap between the fixing cylinder 109 and the second substrate 600 and the third substrate 700. Therefore, the first substrate 500 can be assembled to the fixing cylinder 109 while suppressing the generation of external forces applied to the first joint 501 and the second joint 502.

[0068] In this embodiment, the lens control unit 104 includes a first substrate 500, a second substrate 600, and a third substrate 700, but the present invention is not limited to this embodiment. For example, the lens control unit 104 may not include the third substrate 700.

[0069] Second Implementation Method

[0070] The basic structure of the camera system according to this embodiment is similar to that of the camera system according to the first embodiment. This embodiment will only discuss structures that differ from those in the first embodiment, and those elements that are corresponding elements in the first embodiment will be indicated by the same reference numerals, and their detailed descriptions will be omitted.

[0071] Figure 9 and Figure 10 This is a cross-sectional view of the camera system on the XY plane, including the optical axis, showing the zoom retracted and extended states. The centerline O essentially coincides with the optical axis determined by the imaging optics system, and therefore will be considered synonymous with the optical axis below.

[0072] This embodiment uses a four-unit zoom structure as an example of an imaging optical system. The focusing unit 112, the lens IS unit 115, and the aperture unit 451 serve as the third zoom unit 253. The imaging optical system includes a first zoom unit 251, a second zoom unit 252, and a fourth zoom unit 254. The construction of the lens unit is not limited to that of this embodiment. For example, the focusing unit 112 and the lens IS unit 115 can be used as the second zoom unit. Furthermore, a portion of the lens unit can be fixed rather than movable.

[0073] A linear guide tube 107 guides a movable tube 118 that can move along the optical axis, holds a cam tube 108 that can rotate around the optical axis, and houses a lens holding member that holds the lens. Cam grooves (not shown) are arranged at equally spaced positions on the outer peripheral surface of the linear guide tube 107. On the other hand, a cam follower (not shown) is provided on the inner peripheral surface of the cam tube 108. The cam tube 108 is connected to a zoom operating ring 103. As the zoom operating ring 103 rotates, the cam tube 108 moves along the optical axis while rotating around it due to the engagement of the cam grooves and the cam follower.

[0074] The linear guide tube 107 has a linear guide groove (not shown) that restricts the rotational movement of the second zoom unit 252 to the fourth zoom unit 254 and guides their linear movement in the optical axis direction. A linear key is formed on the subject side of the outer periphery of the linear guide tube 107, which restricts the rotational movement of the first zoom unit 251 and guides its linear movement in the optical axis direction. The cam tube 108 has a cam groove formed for each zoom unit, and each cam groove has a different trajectory angle in the rotational direction. Each of the first zoom unit 251 to the fourth zoom unit 254 includes a cam follower (not shown). The cam follower provided on the first zoom unit 251 engages with a cam groove 108a formed on the outer periphery of the cam ring 108. The cam followers provided on the second zoom unit 252 to the fourth zoom unit 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 cylinder 108 rotates, and the cam follower set on each zoom unit engages with the straight guide groove or the straight guide key and cam groove, so that each zoom unit moves back and forth simultaneously in the optical axis direction.

[0075] Next, the configuration of the first substrate 500 and the second substrate 610 will be described. In the first embodiment, the second substrate 610 and the third substrate 700 are configured by removing a portion of the fixing component and the lens-holding cylinder within the replaceable lens 1. On the other hand, in this embodiment, the second substrate 610 is arranged in an opening provided in the straight-in guide cylinder 107, the cam cylinder 108, and the movable cylinder 118. That is, the lens-holding cylinder is arranged so as not to overlap with the second substrate 610 in the radial direction.

[0076] Figure 11 The configuration of the first substrate 500 and the second substrate 610 is described. Figure 11 (a) is a perspective view of the replaceable lens 101 with the first substrate 500 and the second substrate 610 exposed. Figure 11 (b) is a three-dimensional view of the cam cylinder 108.

[0077] Opening 107c is formed by cutting off a portion of the end of the straight guide cylinder 107 along the optical axis. Opening 108c is formed by cutting off a portion of the end of the cam cylinder 108 along the optical axis. As described above, the straight guide cylinder 107 has a straight guide groove (not shown). Cam grooves 108a and 108b, which serve as moving parts, are formed on the outer and inner circumferences of the cam cylinder 108, respectively. Since the cam follower provided in each zoom unit engages with the straight guide groove or straight key and the cam groove 108a or cam groove 108b, causing each zoom unit to move back and forth simultaneously in the optical axis direction, these grooves cannot be cut off. Therefore, it is necessary to provide openings 107c and 108c at a position that does not overlap with the straight guide groove, cam groove, or connecting member (such as the cam follower). 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.

[0078] As described above, by providing openings at the ends of the multiple moving tubes while maintaining the structure required for lens driving, the second substrate 610 can be arranged spatially efficiently. Therefore, the first substrate 500 can be arranged within the camera system with the second substrate 600 bonded to the main plane on the subject side. Thus, this embodiment can miniaturize the camera system while ensuring sufficient substrate mounting area.

[0079] Third Implementation Method

[0080] The basic structure of the camera system according to this embodiment is similar to that of the camera system according to the first embodiment. This embodiment will only discuss structures that differ from those in the first embodiment, and those elements that are corresponding elements in the first embodiment will be indicated by the same reference numerals, and their detailed descriptions will be omitted.

[0081] Figure 12The arrangement of the first substrate 520 and the second substrate 620 is illustrated, and a partial perspective view of the replaceable lens 101 with the first substrate 520 exposed is shown. The first substrate 520 is positioned and fixed to the retaining sleeve 109 using 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. Therefore, the replaceable lens 101 can be used as part of a camera system for shooting. A flexible printed circuit board (FPC) 622 electrically connects the first substrate 520 and the contact portion 621. Instead of the flexible printed circuit board 622, another wiring unit, such as leads, can be used for electrically connecting the first substrate 520 and the contact portion 621.

[0082] In the interchangeable lens 101 according to the first and second embodiments, the second substrate is bonded to the subject side of the first substrate. On the other hand, in this embodiment, the second substrate 620 is bonded to the image sensor side of the first substrate 520.

[0083] In this embodiment, the lens mount 102 is attached to an external component (not shown), and a notch may not be provided in the first substrate 520. Therefore, the second substrate 620 can be arranged at any position on the surface of the first substrate 520, as long as it avoids the contact portion 621 and the flexible printed circuit board 622. That is, the second substrate 620 is arranged so as not to overlap with the contact portion 621 in the optical axis direction or radial direction. The second substrate 620 is engaged with the first substrate 520 in the gap between the lens mount 102 and the retaining cylinder 109. Effectively utilizing this space allows for miniaturization of the camera system while ensuring substrate mounting area, without increasing the overall length of the lens.

[0084] While preferred embodiments of the invention have been described, it should be understood that the invention is not limited to the disclosed embodiments, and various modifications and changes can be made to the embodiments when implementing the invention.

Claims

1. An optical device, comprising: A first substrate has a principal plane orthogonal to the optical axis of the optical system, and the first substrate has an inner diameter and an outer diameter, each of which is centered about the optical axis. A second substrate is connected to the first substrate and has a main plane parallel to the optical axis direction; A fixing cylinder, which positions the first substrate and simultaneously restricts the movement of the first substrate in the optical axis direction; and The connection between the first substrate and the second substrate, when viewed from the optical axis direction, is arranged so as not to overlap with the fixing portion used to fix a component different from the first substrate to the fixing cylinder. When viewed from the optical axis, at least a portion of the fixed cylinder is located inside the outer diameter.

2. The optical device of claim 1 further includes a positioning member disposed near the connection portion and configured to position the first substrate to the fixing cylinder.

3. The optical device according to claim 1 or 2 further includes a limiting member that limits the movement of the second substrate in the optical axis direction.

4. The optical device according to any one of claims 1 to 3, wherein, The fixing cylinder includes a guide portion, which guides the first substrate in the optical axis direction when the first substrate is attached to the fixing cylinder.

5. The optical device according to any one of claims 1 to 4, further comprising: A cam cylinder capable of rotating around the optical axis; A lens holding member arranged on the inner circumference of the cam cylinder; as well as A connecting member that connects the cam cylinder and the lens holding member. The second substrate is arranged so as not to overlap with any of the cam cylinder, the lens holding member, and the connecting member in the optical axis direction or radial direction.

6. The optical device according to any one of claims 1 to 5, further comprising: A cam cylinder capable of rotating around the optical axis; A lens holding member arranged on the inner circumference of the cam cylinder; as well as A connecting member that connects the cam cylinder and the lens holding member. The cam cylinder includes a moving part that moves the lens holding member or the connecting member along the optical axis direction, and The second substrate is disposed between the first substrate and the moving part.

7. The optical device according to any one of claims 1 to 6 further includes a movable cylinder capable of moving in a direction parallel to the optical axis direction. in, The second substrate is arranged to overlap with the movable cylinder in the direction of the optical axis.

8. The optical device according to any one of claims 1 to 7, further comprising a cam cylinder capable of rotating about the optical axis. in, The second substrate is arranged to overlap with the cam cylinder in the optical axis direction.

9. The optical device according to any one of claims 1 to 8, further comprising a lens holding member for holding the lens, in, The second substrate is arranged to overlap with the lens holding member in the optical axis direction.

10. The optical device according to any one of claims 1 to 9, further comprising a guide tube configured to guide a movable tube movable in a direction parallel to the optical axis, retain a cam tube rotatable about the optical axis, or accommodate a lens holding member for holding a lens. in, The second substrate is arranged to overlap with the guide tube in the optical axis direction.

11. The optical device according to any one of claims 1 to 10, wherein, The second substrate includes a control unit configured to control a lens. Wherein, the second substrate is arranged on the projection of the first substrate, and The width of the first substrate is smaller than one side of the control unit.

12. The optical device according to any one of claims 1 to 11, further comprising an optical element disposed on the inner diameter side of the first substrate.

13. The optical device according to any one of claims 1 to 12, wherein, The first substrate and the second substrate are joined together by welding.

14. The optical device according to any one of claims 1 to 13, wherein, The first substrate and the second substrate are bonded together by a conductive resin.

15. An optical device, comprising: A first substrate has a principal plane orthogonal to the optical axis of the optical system, and the first substrate has an inner diameter and an outer diameter, each of which is centered about the optical axis. A second substrate is connected to the first substrate and has a main plane parallel to the optical axis direction; The contact portion electrically connects the first substrate to the camera device; as well as The mounting bracket is capable of being mechanically connected to the camera device. The second substrate is disposed between the first substrate and the mounting base, and is arranged so as not to overlap with the contact portion in the optical axis direction or radial direction.

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