Lens apparatus

Abstract

The lens apparatus includes: a lens disposed closest to a subject; a holder that holds the lens; a cover having a first opening exposing the lens when viewed from an optical axis direction of the lens, and positioned together with the holder in the optical axis direction; and an exterior member having a second opening engaged with the outer diameter of the cover. A first gap formed between the holder and the cover in a diametrical direction orthogonal to the optical axis direction is larger than a second gap formed between the exterior member and the cover in the diametrical direction.

Description

[0001] This application is a divisional application of the invention patent application with application number 202210651474.7, application date June 9, 2022, and invention title "Lens Device". Technical Field

[0002] This disclosure relates to a lens device. Background Technology

[0003] Interchangeable lenses for stereoscopic photography are conventionally known as one of the applications of interchangeable lens systems. Japanese Patent Application Publication No. 2012-3022 discloses a lens that includes two optical systems arranged in parallel and images two image rings parallel onto a single image sensor.

[0004] When viewing with VR eyepieces, it is desirable to have a viewing angle of more than 180 degrees for both moving and still images in order to achieve not only a 3D effect but also a sense of presence. Considering manufacturing errors, in order to provide images with a viewing angle of at least 180 degrees, it is desirable for the camera lens to be able to capture images with a viewing angle greater than 180 degrees.

[0005] However, the lens disclosed in Japanese Patent Application Publication No. 2012-3022 cannot capture images with an angle of view greater than 180 degrees. To capture images with an angle of view greater than 180 degrees, it is necessary to place the outer component on the imaging plane side of the apex of the front lens, ensuring that the outer component does not block light beams incident on the front lens at angles greater than 180 degrees, and to provide an opening in the outer component that allows for the insertion of two lenses. In this case, when the lens position shifts, the gap between the opening and the lens becomes uneven, which may degrade the appearance quality. Furthermore, when a drip-proof structure is provided, the unevenness of the gap adversely affects the dust- and drip-proof performance. If the opening and the lens are diametrically joined so that the gap does not become uneven, the lens position shift is corrected, which will adversely affect the optical performance and the relative relationship between the two optical systems. Summary of the Invention

[0006] This disclosure provides a lens device that maintains appearance quality, achieves dust and drip resistance as well as optical performance, and enables stereoscopic imaging with a viewing angle greater than 180 degrees.

[0007] A lens device according to one aspect of the invention includes: a lens arranged closest to a subject; a retainer holding the lens; a cover having a first opening exposing the lens when viewed from the optical axis direction and positioned together with the retainer in the optical axis direction; and an outer fitting having a second opening engaging with the outer diameter of the cover. A first gap formed between the retainer and the cover in a diametrical direction orthogonal to the optical axis direction is greater than a second gap formed between the outer fitting and the cover in the same diametrical direction.

[0008] Other features of the invention will become apparent from the following description of exemplary embodiments, with reference to the accompanying drawings. Attached Figure Description

[0009] Figure 1 This is a schematic structural diagram of a camera system according to one embodiment of the present disclosure.

[0010] Figure 2 It is a cross-sectional view of the lens equipment.

[0011] Figure 3 This is an exploded stereoscopic view of the lens equipment as seen from the subject side.

[0012] Figure 4 This is an exploded stereoscopic view of the lens device as seen from the imaging plane side.

[0013] Figure 5 This is a front view of the lens equipment.

[0014] Figure 6 It is along Figure 5 The cross-sectional view taken from line AA in the diagram.

[0015] Figure 7 A variation of the lens device is shown.

[0016] Figure 8 It is along Figure 5 The cross-sectional view of line BB.

[0017] Figure 9 The positional relationship between each optical axis and the image ring on the image sensor is shown.

[0018] Figure 10 The image shows the response of the left-eye optical system when the image is captured by the right-eye optical system.

[0019] Figure 11 This is a 3D view of the lens cap when it is installed on a lens device.

[0020] Figure 12 This is a 3D view of the lens cap when it is installed on a lens device.

[0021] Figure 13 This is a 3D view of the lens cap when it is removed from the lens equipment.

[0022] Figure 14 This is an exploded 3D view of the lens cap.

[0023] Figure 15 It is a cross-sectional view of the lens cap and the first lens with the lens cap installed.

[0024] Figure 16 This is a side view of the slider and the first lens with the lens cap installed.

[0025] Figure 17 This is a top view of the slider and the first lens with the lens cap installed.

[0026] Figure 18 This is a cross-sectional view of the lens cap and the first lens when the lens cap according to another example is installed.

[0027] Figure 19 It is a 3D view of the lens equipment.

[0028] Figure 20 This is a side view of the lens equipment.

[0029] Figure 21 It is a bottom view of the lens equipment.

[0030] Figure 22 This is a front view of the lens device with the front outer components and cover removed.

[0031] Figure 23A and Figure 23B It is a 3D view of the main parts of the lens equipment.

[0032] Figure 24 This is a cross-sectional view showing the path of the flexible substrate.

[0033] Figure 25 This is a front view of a lens device, serving as another example.

[0034] Figure 26 This is a cross-sectional view of a lens device as another example. Detailed Implementation

[0035] A detailed description of embodiments according to the present disclosure will now be given with reference to the accompanying drawings. Corresponding elements in the various drawings will be indicated by the same reference numerals, and repeated descriptions of these elements will be omitted.

[0036] Figure 1This is a schematic structural diagram of a camera system 100 according to one embodiment of the present disclosure. The camera system 100 includes a camera body (imaging device) 110 and a lens device (interchangeable lens) 200, and is capable of capturing stereoscopic images.

[0037] The camera body 110 includes an image sensor 111, an A / D converter 112, an image processing unit 113, a display unit 114, an operation unit 115, a memory 116, a camera control unit 117, and a camera interface 122.

[0038] The lens device 200 includes a right-eye optical system (first optical system) 201R, a left-eye optical system (second optical system) 201L, a lens interface (interface unit) 202, and a lens control unit 209. The lens device 200 is capable of being mounted to and detached from the camera body 110. The two optical systems are arranged in parallel (symmetrically) and configured such that two image circles are imaged parallel onto the image sensor 111. The two optical systems are arranged horizontally and spaced a predetermined distance (baseline length). When viewed from the imaging plane side (image side), the right image captured by the right-eye optical system 201R is recorded as a moving or still image for the right eye, and the left image captured by the left-eye optical system 201L is recorded as a moving or still image for the left eye. Viewing the reproduced moving or still images using a 3D display, VR eyepiece, etc., allows the right-eye image to be displayed on the viewer's right eye and the left-eye image to be displayed on the viewer's left eye. At this point, the image with parallax is projected onto the right and left eyes according to the baseline length, providing a stereoscopic effect for the viewer. Therefore, lens device 200 is a lens device for stereoscopic imaging that can use two optical systems to capture two images with parallax.

[0039] When the lens device 200 is installed on the camera body 110 via the lens interface 202 and the camera interface 122, the camera control unit 117 and the lens control unit 209 are electrically connected to each other.

[0040] An image of the subject is formed parallel to the image sensor 111. The image of the subject includes a right-eye image formed via the right-eye optical system 201R and a left-eye image formed via the left-eye optical system 201L. The image sensor 111 converts the captured image of the subject (light signal) into an analog electrical signal. The A / D converter 112 converts the analog electrical signal output from the image sensor 111 into a digital electrical signal (image signal). The image processing unit 113 performs various image processing operations on the digital electrical signal output from the A / D converter 112.

[0041] Display unit 114 displays various information. Display unit 114 includes, for example, an electronic viewfinder or an LCD panel. Operation unit 115 functions as a user interface for issuing commands to camera system 100. If display unit 114 has a touch panel, the touch panel also constitutes operation unit 115.

[0042] The memory 116 includes, for example, ROM, RAM and HDD, and stores various data and programs, such as image data that has been processed by the image processing unit 113.

[0043] The camera control unit 117 includes, for example, a CPU and controls the entire camera system 100 as a whole.

[0044] Figure 2 This is a cross-sectional view of lens device 200. Figure 3 This is an exploded stereoscopic view of the lens device 200 as viewed from the subject side. Figure 4 This is an exploded stereoscopic view of the lens device 200 as viewed from the imaging plane side.

[0045] In the following description, the right-eye optical system 201R will be assigned an "R" at the end of the reference numerals, and the left-eye optical system 201L will be assigned an "L" at the end of the reference numerals. In the general description for both the right-eye optical system 201R and the left-eye optical system 201L, neither "R" nor "L" will be added to the end of the reference numerals. Each of the right-eye optical system 201R and the left-eye optical system 201L can capture images with a viewing angle greater than 180 degrees. Each optical system is a curved optical system with two reflective surfaces. In each optical system, a first optical axis OA1, a second optical axis OA2 approximately orthogonal to the first optical axis OA1, and a third optical axis OA3 parallel to the first optical axis OA1 are sequentially defined from the subject side. Each optical system includes a first lens 211, a second lens 221, and third lenses 231a and 231b. The first lens 211 is arranged on the first optical axis OA1 and has a convex lens surface 211A on the subject side. The second lens 221 is arranged on the second optical axis OA2, and the third lenses 231a and 231b are arranged on the third optical axis OA3. Each optical system also has a first prism (first reflecting surface) 220 and a second prism (first reflecting surface) 230. The first prism 220 bends the light beam on the first optical axis OA1 and guides the beam to the second optical axis OA2, and the second prism 230 bends the light beam on the second optical axis OA2 and guides the beam to the third optical axis OA3. In the following description, the optical axis direction refers to a direction parallel to the first optical axis OA1, which extends towards the subject side and the imaging plane side.

[0046] Each optical system is secured to the top lens base 300 by fastening screws or the like. The top lens base 300 is secured to the bottom lens base 301 by fastening screws or the like. The top lens base 300 and the bottom lens base 301 function as base members, on which the right eye optical system 201R, the left eye optical system 201L, and the circuit board 310 are mounted. The right eye optical system 201R, the left eye optical system 201L, and the circuit board 310 can move integrally with the base members relative to the lens interface 202 in the first optical axis direction. The bottom lens base 301 is held movable along the optical axis direction, while its rotational movement is restricted by a linear movement structure (not shown). Therefore, since each optical system can move as a whole along the optical axis direction, the right eye optical system 201R and the left eye optical system 201L can simultaneously adjust their focal positions.

[0047] Figure 5 This is a front view of lens device 200. Figure 6 It is along Figure 5 The cross-sectional view taken by line AA in the figure shows the structure of the first lens 211 and its surrounding area. Figure 7 A variation of the lens device 200 is shown. Figure 8 It is along Figure 5 The cross-sectional view taken by line BB in the figure shows the first lens 211 of the lens device 200 and its surrounding structure.

[0048] The lens device 200 includes an outer cover member 203 and a front outer cover member (outer cover member) 204. The outer cover member 203 houses the right eye optical system 201R and the left eye optical system 201L. The front outer cover member 204 is screwed and fixed to the outer cover member 203, and the front outer cover member 204 and the outer cover member 203 can accommodate the front side of the lens device 200 to cover the lens device 200.

[0049] The front mounting component 204 has an opening (second opening) 204F into which the first lens (first lens) 211R of the right eye optical system 201R and the first lens (second lens) 211L of the left eye optical system 201L are inserted. The front mounting component 204 has a shape that does not obstruct the effective light beam of the right eye optical system 201R and the left eye optical system 201L, both of which have an effective field of view (FOV) greater than 180 degrees. The lens surface 211A on the subject side of the first lenses 211R and 211L is the incident surface of the effective light beam on the subject side. When the effective incident surface 211B is set inside the outer diameter 211C of the effective incident surface of the lens surface 211A, the light beam with a field of view of 180 degrees extends horizontally from the effective incident surface 211B in a direction approximately orthogonal to the optical axis. A beam with an angle of view greater than 180 degrees is located on the imaging surface side of the effective incident surface 211B and extends toward the imaging surface side as its position moves away from the first lens 211. Therefore, the front outer member 204 and the cover member 213 are arranged on the imaging surface side of the effective incident surface 211B because the front outer member 204 and the cover member 213 do not obstruct the beam with an angle of view greater than 180 degrees.

[0050] Now, as Figure 5 As shown, relative to the center point O between the right eye optical system 201R and the left eye optical system 201L, it is assumed that the right eye region 20R is the region located on the side of the right eye optical system 201R, and the left eye region 20L is the region located on the side of the left eye optical system 201L. Then, the front external component 204 has a subject side 204A in the right eye region 20R. When the position is separated from the first lens 211L of the left eye optical system 201L, the subject side 204A approaches the imaging plane so as not to block the outermost effective beam of the left eye optical system 201L. Figure 8 (The thick dashed line in the image). The front external component 204 has a subject side 204B in the left eye region 20L. When the position is separated from the first lens 211R of the right eye optical system 201R, the subject side 204B approaches the imaging plane so as not to block the outermost effective beam of the right eye optical system 201R. However, the first lens 211L and its periphery as viewed from the right eye optical system 201R and the first lens 211R and its periphery as viewed from the left eye optical system 201L also have areas that block a portion of each other's effective beam.

[0051] To form the opening 204F, the front outer component 204 has wall portions 204C and 204D protruding from the subject sides 204A and 204B toward the subject side. Wall portion 204C has an arcuate shape that is substantially coaxial with the first lens 211R of the right eye optical system 201R, and does not block the effective light beam of the right eye optical system 201R, but rather blocks a portion of the effective light beam of the left eye optical system 201L. Wall portion 204D has an arcuate shape that is substantially coaxial with the first lens 211L of the left eye optical system 201L, and does not block the effective light beam of the left eye optical system 201L, but rather blocks a portion of the effective light beam of the right eye optical system 201R.

[0052] like Figure 6 As shown, the lens device 200 includes a first lens holder 212 and a cover member 213. The first lens holder 212 holds first lenses 211R and 211L. The cover member 213 covers the outer periphery of the lens surface 211A on the subject side of the first lenses 211R and 211L, and has an opening (first opening) 213A for inserting the first lenses 211R and 211L. The opening 213A is formed to expose the first lenses 211R and 211L when viewed from the optical axis direction.

[0053] On the outer periphery of the effective incident surface outer diameter 211C of the first lens 211, there exists a boundary 211D with the lens surface 211A. Boundary 211D is the boundary between the lens surface 211A and other surfaces or components. For example, boundary 211D can be the boundary between the lens surface 211A and the side surface 211E of the first lens 211, or as... Figure 7 As shown, it can be the boundary between the lens surface 211A and the inner diameter end portion, the inner diameter end portion having a crimping claw shape for crimping the first lenses 211R and 211L.

[0054] Cover member 213 covers boundary 211D. That is, the inner diameter of the opening 213A of cover member 213 is smaller than the diameter of boundary 211D. Where ΦA is the inner diameter of opening 213A and ΦB is the diameter of boundary 211D, the amount of overlap on one side X is represented by the following expression (1).

[0055] X = (ΦB - ΦA) / 2 (1)

[0056] The appearance quality can be improved by covering the boundary 211D.

[0057] A recessed portion 213B is formed in a portion of the inner periphery of the cover member 213. A protrusion 212A extending toward the outer periphery is formed on a portion of the outer periphery of the first lens holder 212. When the recessed portion 213B and the protrusion 212A are in a position where they do not overlap when viewed from the optical axis, the recessed portion 213B and the protrusion 212A are assembled, and the protrusion 212A is inserted into the recessed portion 213B by rotating the cover member 213. Thus, the cover member 213 and the first lens holder 212 are positioned in the optical axis direction. The first lens holder 212 may be provided with a recessed portion, and the cover member 213 may be provided with a protrusion.

[0058] A predetermined gap (first gap) Y is formed between the first lens holder 212 and the cover member 213 in a (diameter) direction orthogonal to the optical axis. Since the predetermined gap Y is smaller than the overlap amount X of the cover member 213, the cover member 213 can cover the boundary 211D even if the first lens holder 212 or the cover member 213 moves the predetermined gap Y.

[0059] The cover member 213 is positioned with the first lens holder 212 in the optical axis direction, and therefore can move integrally with the first lens holder 212 in the optical axis direction. The outer diameter of the cover member 213 engages with the inner diameter of the opening 204F of the front outer member 204. The gap (second gap) formed between the front outer member 204 and the cover member 213 in a direction orthogonal to the optical axis direction through this engagement is very small and smaller than the predetermined gap Y.

[0060] The cover member 213 includes a rotation limiting key (protrusion) 213C, and the front outer member 204 includes a rotation limiting groove (groove portion) 204E corresponding to the rotation limiting key 213C. Therefore, when the front outer member 204 is assembled, the rotation limiting key 213C is inserted into the rotation limiting groove 204E, limiting the rotation of the cover member 213. This structure prevents the cover member 213 from rotating and disengaging from the first lens holder 212. The cover member 213 may be provided with a rotation limiting groove, and the front outer member 204 may be provided with a rotation limiting key. That is, one of the cover member 213 and the front outer member 204 may include a rotation limiting key, and the other may include a rotation limiting groove.

[0061] The optical axis direction (OAD) sealing member 214 is a drip-proof and dust-proof member, disposed between the imaging surface side (first surface) 213D of the cover member 213 and the subject side side (second surface) 212B of the first lens holder 212 facing the surface 213D, and seals the space between surfaces 213D and 212B. Surfaces 213D and 212B can be formed over the entire circumference, but can also be formed partially. Because the OAD sealing member 214 is clamped in the optical axis direction, the cover member 213 and the first lens holder 212 are subjected to force in the optical axis direction, and instability (or loosening) in the optical axis direction can be reduced.

[0062] To maintain the predetermined gap Y, the OAD sealing member 214, the cover member 213, and the first lens holder 212 are arranged with a gap (gap) greater than the predetermined gap Y in a direction orthogonal to the optical axis. The OAD sealing member 214 is made of an elastically deformable material, such as rubber or sponge, and can absorb the predetermined gap Y.

[0063] The radial sealing member 215 is a drip-proof and dust-proof member, and is arranged in a direction orthogonal to the optical axis to be sandwiched between the cover member 213 and the opening 204F. The radial sealing member 215 on the right eye optical system 201R side is arranged at the position that blocks the effective beam of the left eye optical system 201L, and the radial sealing member 215 on the left eye optical system 201L side is arranged at the position that blocks the effective beam of the right eye optical system 201R.

[0064] The above structure provides a lens device 200 that maintains aesthetic quality, achieves both dust and drip resistance and optical performance, and enables stereoscopic imaging with a viewing angle greater than 180 degrees. Since the first lens holder 212 does not directly engage with the opening 204F in the front outer casing 204, even if the position of the first lens holder 212 shifts due to manufacturing errors, etc., this position does not require calibration. Therefore, even with the front outer casing 204 assembled, the relative error and optical performance between the right-eye optical system 201R and the left-eye optical system 201L remain unchanged.

[0065] Figure 9 The positional relationship between each optical axis of the lens device 200 and the image ring on the image sensor 111 is shown.

[0066] The right-eye image ring ICR, formed by the right-eye optical system 201R with an effective field of view, and the left-eye image ring ICL, formed by the left-eye optical system 201L with an effective field of view, are imaged parallel to each other on the image sensor 111. The diameter ΦD2 of the image rings and the spacing between the image rings can be set so that the image rings do not overlap. For example, the center of the right-eye image ring ICR can be set to approximately the center of the right region (formed by dividing the light-receiving area of ​​the image sensor 111 into a left half and a right half at the center), and the center of the left-eye image ring ICL can be set to approximately the center of the left region.

[0067] Each optical system is a wide-angle fisheye lens. In this embodiment, each optical system is a circumferential (full-circumference) fisheye lens, and the image formed on the imaging plane is a circular image reflecting a viewing angle range greater than 180 degrees, and as... Figure 9 As shown, two circular images are formed on the left and right sides. The longer the distance (baseline length) L1 between the first optical axis OA1R of the right eye optical system 201R and the first optical axis OA1L of the left eye optical system 201L, the more pronounced the stereoscopic effect becomes during viewing. For example, assuming the image sensor 111 has dimensions of 24mm long × 36mm wide, the diameter ΦD2 of the image ring is 17mm, the distance L2 between the third optical axes OA3R and OA3L is 18mm, and the length of the second optical axis is 21mm. When each optical system is configured such that the second optical axis extends in the horizontal direction, the baseline length L1 becomes 60mm, which is almost equal to the width of an adult's eye. By making the diameter ΦD of the lens interface 202 (relative to the fitting diameter of the camera body 110) shorter than the baseline length L1 and the distance L2 between the third optical axes shorter than the diameter ΦD of the lens interface 202, a lens arranged on the third optical axis can be placed inside the lens interface 202. In VR viewing, the field of view for achieving a stereoscopic effect is said to be approximately 120 degrees. However, discomfort still exists even with a 120-degree field of view, so the field of view is usually widened to 180 degrees. Since the effective field of view in this embodiment exceeds 180 degrees, the image circle diameter ΦD2 in this embodiment is greater than the image circle diameter ΦD3 within the 180-degree field of view range.

[0068] Figure 10The diagram illustrates the response of the left-eye optical system 201L when an image is captured using the right-eye optical system 201R. The wall portion 204D of the front outer casing 204 images inside the diameter ΦD2 of the image circle, which serves as the effective viewing angle, but not at a 180-degree viewing angle; instead, it images outside the diameter ΦD3 of the image circle within a 180-degree viewing angle. Therefore, VR viewing is unaffected within a 180-degree viewing angle. For example, within the effective viewing angle of the right-eye optical system 201R, the first lens 211L, the cover member 213, and the wall portion 204D of the front outer casing 204 of the left-eye optical system 201L are present in the left-eye region 20L, and they are as follows... Figure 10 The image shown is within the practically effective imaging range. Only the first lens 211L images within the image circle at a 180-degree angle (inside the diameter ΦD3), but the cover member 213 and the wall portion 204D are located outside the image circle at a 180-degree angle. Even when viewed horizontally from the apex of the first lens 211L, the reflection of the wall portion 204D is also on the outside (in the image circle). Figure 10 Image formation (shown on the left). In the case of image processing or image editing, if the outer side of the vertex portion indicated by the straight line Z of the first lens 211L, which is always reflected due to specifications, is removed, the reflection of the wall portion 204D will not be affected. This also applies to the reflection of the right eye optical system 201R when an image is captured using the left eye optical system 201L. As described above, although the wall portion 204D is within the effective field of view, it is positioned to have almost no impact on imaging in practical VR applications.

[0069] The structure of the lens cap 400, which can be installed on and removed from the lens device 200 by means of a single action, will be described below. Figure 11 This is a perspective view of the lens cap 400 that is installed on the lens device 200. Figure 12 This is a perspective view of the lens cap 400 when it is installed on the lens device 200 (not shown). Figure 13 This is a perspective view of the lens cap 400 when it is removed from the lens device 200 (not shown). Figure 14 This is an exploded 3D view of the lens cap 400.

[0070] The lens cap 400 includes a base 401, sliders (slider components) 402A and 402B, and springs 403A and 403B. Sliders 402A and 402B have the same shape, are connected in a 180-degree rotational phase, and are integrated into the base 401. Slider 402A (402B) includes an operating unit 402A2 (402B2), a connecting portion 402A3 (402B3) that engages with the lens device 200, and a stop portion 402A4 (402B4) that abuts against the base 401. Additionally, slider 402A (402B) includes a connecting portion disposed between the optical axis of the first lens 211R and the optical axis of the first lens 211L. Furthermore, slider 402A (402B) is subjected to force by spring 403A (403B) integrated into the base 401 towards the side where the operating unit 402A2 (402B2) is located. The base 401 and the stop 402A4 (402B4) are in contact with each other when the slider 402A (402B) is under force. By simultaneously pushing the operating units 402A2 and 402B2 towards the connecting parts 402A3 and 402B3, the connecting parts 402A3 and 402B3 are opened and closed, and the lens cap 400 can be installed onto and removed from the lens device 200. By simply pressing one of the operating units, the lens cap 400 can be installed onto and removed from the lens device 200.

[0071] The following will describe the construction of the lens cap 400 and the first lens 211 when the lens cap 400 is installed. Figure 15 This is a cross-sectional view of the lens cap 400 and the first lens 211 with the lens cap 400 installed. Figure 16 This is a side view of sliders 402A and 402B and the first lens 211 with the lens cap 400 installed. Figure 17 This is a top view of the sliders 402A and 402B and the first lens 211 with the lens cap 400 installed.

[0072] Sliders 402A and 402B are positioned between first lenses 211R and 211L, which are arranged on the first optical axis OA1. Sliders 402A and 402B, along with the first lenses 211R and 211L, are located on the same plane orthogonal to the optical axis. This reduces the thickness of slider 402 in the optical axis direction. Furthermore, operating units 402A2 and 402B2 are positioned centrally between the first lenses 211R and 211L. This allows for smooth operability.

[0073] Figure 18 This is a cross-sectional view of the lens cap 400 and the first lens 211 when the lens cap 400 according to another example is installed.

[0074] Slider 402A and 402B are positioned between first lenses 211R and 211L arranged on the first optical axis OA1, and sliders 402A and 402B, as well as first lenses 211R and 211L, are not positioned on the same plane orthogonal to the optical axis direction. As a result, the thickness of sliders 402A and 402B is increased, making the weight heavier when the lens device 200 is enlarged, and improving the strength even if the strength of sliders 402A and 402B is insufficient due to drop tests, etc.

[0075] The configuration of the connecting parts 203A, 203B, 203C and 203D that fit into the connecting parts 402A3 and 402B3 in the lens device 200 will be described below. Figures 19 to 21 These are, respectively, a perspective view, a side view, and a bottom view of the lens device 200. The viewing angle of the lens device 200 is the range indicated by the dashed line G, and extends more than 180 degrees towards the subject side. If components, including connecting parts, are located on the subject side within the range indicated by the dashed line G, these components will be reflected in the image. Therefore, connecting parts 203A, 203B, 203C, and 203D are located outside the viewing angle indicated by the dashed line G. In this embodiment, connecting parts 203A, 203B, 203C, and 203D are located in a direction visible from the external view, but the lens cap 400 can be fitted into the lens device 200 in a direction not visible from the external view (i.e., from the inside). Even in this case, by arranging connecting parts 203A, 203B, 203C, and 203D outside the viewing angle indicated by the dashed line G, it is possible to prevent connecting parts 203A, 203B, 203C, and 203D from being reflected in the image.

[0076] like Figure 1 and Figure 22 As shown, the lens system control unit 209 is configured as a circuit board 310 inside the replaceable lens 200. Figure 2 As shown, an aperture device (electronic component) 240 is disposed in each of the right eye optical system 201R and the left eye optical system 201L, and an electronically controlled drive source 320, such as a stepper motor (see...). Figure 23A and Figure 23B ( ), which allows you to set the desired aperture.

[0077] like Figure 2 and Figure 22 As shown, a circuit board 310 for electronically controlling the aperture device 240 is mounted on the lens top base 300. Figure 23A and Figure 23BAs shown, the circuit board 310 includes multiple electrical components 310A for communicating with and controlling electronic components of the camera body 110, and is electrically connected via wiring units. Additionally, a flexible substrate (second flexible substrate) 330A is configured to communicate with the electronic components to be controlled. The flexible substrate 330A is electrically connected to the aperture device 240 and a drive source 320 such as a stepper motor. The circuit board 310 is provided with a connector (second connector) 310B for electrically connecting the flexible substrate 330A. The connector 310B is symmetrically arranged around the axis of the lens interface 202.

[0078] Furthermore, a flexible substrate (first flexible substrate) 330B is configured to communicate with the camera body 110. The flexible substrate 330B is electrically connected to an electrical contact (communication unit) 202A disposed on the lens interface 202 for communication with the camera body 110. Additionally, a connector (first connector) 310C for electrically connecting the flexible substrate 330B is disposed on the circuit board 310. The flexible substrate 330B is electrically connected to the electrical contact 202A and the connector 310C, and extends in the direction of the lens interface axis MA. When viewed from the direction of the lens interface axis MA, the connectors 310B and 310C are configured not to overlap with the first lens 211 and the first lens holder 212, which are closest to the subject in each of the right eye optical system 201R and the left eye optical system 201L. With the above configuration, the circuit board 310 can communicate with the camera body 110 through the lens interface 202 and can control electronic components such as the aperture device 240 disposed inside the interchangeable lens 200.

[0079] In this embodiment, the circuit board 310 electronically controls the aperture device 240. However, if there is an object to be electronically driven, such as when driving a lens for vibration isolation or autofocus, the circuit board 310 can play an electronic control role.

[0080] The circuit board 310 is fixed to the top lens base 300 by fastening screws or the like. In addition, the top lens base 300 and the bottom lens base 301 are base components of the binocular optical system unit, and the right eye optical system 201R and the left eye optical system 201L can move back and forth along the optical axis integrally with the base components.

[0081] like Figure 2As shown, the circuit board 310 is positioned between the two first optical axes OA1R and OA1L of the right eye optical system 201R and the left eye optical system 201L (at a position sandwiched between the two first optical axes), and is disposed on the subject side of the second optical axes OA2R and OA2L. Furthermore, the circuit board 310 is disposed on the axis of the lens interface 202 (on the lens interface axis MA). Moreover, the substrate surface of the circuit board 310 (the surface where the electrical components 310A are disposed) is perpendicular to the lens interface axis MA.

[0082] Furthermore, when viewed from the direction of the first optical axis or the lens interface axis MA, the circuit board 310 is positioned overlapping the lens surface 211A on the subject side of the first lens 211, with the first lens 211 positioned closer to the subject than the circuit board 310. Additionally, the circuit board 310 is positioned closer to the image plane than the lens surface 211A and is positioned between the sides of a lens with a small diameter. Figure 2 Although it overlaps with the small-diameter portion of the first lens 211, the circuit board 310 can be configured to be held by another lens closer to the image plane than the first lens 211. That is, the circuit board 310 is positioned between the sides of the lens member that are configured to be closer to the image plane than the lens surface 211A. Furthermore, the circuit board 310 is positioned on the extension line of the third optical axis OA3. In addition, the circuit board 310 is positioned in the region where the second prism 230 (which serves as an optical member forming the second optical axis OA2) and the lens interface axis MA overlap when viewed from the direction of the lens interface axis MA.

[0083] Positioning the circuit board 310 in this manner effectively utilizes the space between the two optical systems created by ensuring the distance L1 between the first optical axes (as an appropriate baseline length for VR stereoscopic viewing), and allows for a space-saving configuration. This is also advantageous for the miniaturization of the interchangeable lens 200.

[0084] Furthermore, in the case of an interchangeable lens 200 where two optical systems image on a single imaging sensor as in this embodiment, the third optical axis OA3 is inside the diameter of the lens interface 202 and protrudes to the outer diameter of the body of the interchangeable lens 200 via the second optical axis OA2 to ensure baseline length. In such a configuration, when attempting to arrange a ring-shaped or C-shaped circuit board near the lens interface as is conventional, for example, components such as the first prism 220, the second prism 230, and the retaining frame for holding them, as well as the inner cladding members of the bottom base 301, may be affected. As a result, design freedom is reduced, and the interchangeable lens 200 becomes larger. For example, when attempting to arrange a ring-shaped or C-shaped circuit board near the lens interface as is conventional, it is conceivable to arrange the second optical axis OA2 closer to the subject to ensure space. However, if the second optical axis OA2 is arranged closer to the subject, the overall length of the optical system increases, and the outer diameter of the lens itself also increases, leading to a larger interchangeable lens. Conversely, configuring the second optical axis OA2 closer to the image plane can shorten the overall length of the lens and reduce its diameter, which can help to miniaturize interchangeable lenses.

[0085] Furthermore, as an efficiency improvement for the circuit board 310 itself, its surface shape is not a conventional ring or C-shape, but rather a roughly rectangular shape, which allows for better efficient placement and routing of electrical components 310A within the circuit board 310. In addition, compared to a ring or C-shape, the roughly rectangular shape improves the stamping efficiency during manufacturing. Cost reduction can be achieved by increasing the number of sheets obtained through stamping.

[0086] Figure 22 This is a front view of the replaceable lens 200 with the front outer component 204 and cover 213 removed, as viewed from the subject side along the lens interface axis MA. The circuit board 310 is secured to the lens top base 300 at the fixing part 310D by fastening screws or the like. The fixing method can be screw fastening or adhesion. When viewed from the subject side in the direction of the first optical axis OA1, the fixing part 310D is configured not to overlap with the first lens 211 (which is arranged closer to the subject than the circuit board 310) and the first lens holder 212. Similarly, connectors 310B and 310C are configured not to overlap with the first lens 211 and the first lens holder 212. With this configuration, for example, the circuit board 310 can be assembled with only the front outer component 204 and cover 213 unassembled, and can be fixed or connected to a flexible substrate. Then, after fixing and connecting the circuit board 310, the front outer component 204 and cover 213 can be assembled to complete the replaceable lens 200. Even if circuit board 310 needs to be replaced due to a defect, it can be replaced relatively quickly.

[0087] Furthermore, as described above, the circuit board 310 is disposed on the lens interface axis MA. Moreover, when viewed from the direction of the lens interface axis MA, it is desirable that at least a portion of the electrical components 310A disposed on the circuit board 310 be disposed inside the diameter ΦD of the lens interface 202. Additionally, when viewed from a direction orthogonal to each of the distance direction (the direction of the baseline length L1) between the two first optical axes OA1R and OA1L and the direction of the first optical axes, it is desirable that the circuit board 310 be disposed between the two first optical axes OA1R and OA1L. As a result, the replaceable lens 200 can be further miniaturized. For miniaturization, it is desirable that the fixing portion 310D for mounting the circuit board 310 is also disposed inside the diameter ΦD. However, depending on the fixing method and fixing position, from a design perspective, the outer side of the diameter ΦD may be preferred. Therefore, at least the electrical components 310A are located inside the diameter ΦD, making this configuration more conducive to miniaturization.

[0088] Figure 23A and Figure 23B This is a stereoscopic view of the main parts of the interchangeable lens 200 as viewed from two different directions. Figure 23A and Figure 23B Only the lens interface 202 and circuit board 310, their peripheral components such as flexible substrates 330A and 330B, the lens top base 300 and lens bottom base 301 of the base components are shown. Figure 24 This is a cross-sectional view showing the path of the flexible substrate 330B.

[0089] The flexible substrate 330B is electrically connected to the electrical contact 202A of the lens interface 202 and the connector 310C of the circuit board 310, and can communicate with the camera body 110. The flexible substrate 330B extends in the direction of the lens interface axis MA. In this embodiment, the lens bottom base 301 is disposed as a base member in a space where a ring-shaped or C-shaped circuit board is disposed, as is conventional. The lens bottom base 301 includes a mechanism for moving the optical system in the optical axis direction near its outer periphery, and acts as a barrier when connecting the flexible substrate 330B from the lens interface 202 to the circuit board 310. In this embodiment, as Figure 23A , Figure 23B and Figure 24 As shown, a through hole 301A is formed on the lens base 301, and the flexible substrate 330B is configured to pass through the through hole 301A. With this configuration, the connection between the lens interface 202 and the circuit board 310 can be made with a relatively short distance.

[0090] Next, refer to Figure 25 and Figure 26 The configuration of circuit board 310, which is another example of this embodiment, will be described. Figure 25 This is a front view of the replaceable lens 200 used to show the configuration of the circuit board 310 as another example of this embodiment, and is a view of the main part when viewed from the subject side in the direction of the lens interface axis MA. Figure 26 It is a cross-sectional view of the interchangeable lens 200 used to illustrate the configuration of the circuit board 310 as another example, and is a view of the main part when viewed from a direction orthogonal to each of the direction of the baseline length and the direction of the first optical axis OA.

[0091] like Figure 25 and Figure 26 As shown, even if the substrate surface of the circuit board 310 (the surface where the electrical components 310A are disposed) is configured parallel to each of the baseline length direction and the first optical axis OA1, the circuit board 310 can be configured in a space-saving manner. Even in this case, as Figure 25 As shown, since at least the electrical component 310A is disposed inside the diameter ΦD of the lens interface 202, a structure conducive to miniaturization can be obtained. Furthermore, as... Figure 26 As shown, when viewed from a direction orthogonal to both the baseline length direction and the direction of the first optical axis OA, the circuit board 310 is configured to be sandwiched between the first optical axis OA1 (OA1R, OA1L). Furthermore, when viewed from a direction orthogonal to both the baseline length direction and the direction of the first optical axis OA, the circuit board 310 is configured to overlap with the first lens 211 and the second prism 230, which serves as an optical component forming the second optical axis OA2. This configuration allows for a more space-efficient arrangement.

[0092] According to this embodiment, a lens device and an imaging device for stereoscopic photography can be provided, wherein the circuit board is appropriately configured to improve space efficiency.

[0093] While the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the appended claims should be accorded the broadest interpretation to cover all such variations and equivalent structures and functions.

Claims

1. A lens device comprising: An interface for mounting the lens device to an imaging device; as well as A circuit board configured to communicate with the imaging device. in, The lens has a first lens included in a first optical system and a second lens included in a second optical system. Each of the first and second optical systems is a curved optical system having a first reflecting surface and a second reflecting surface, and sequentially includes, starting from the subject side, a first optical axis, a second optical axis of light reflected by the first reflecting surface, and a third optical axis of light reflected by the second reflecting surface. When viewed from the axial direction of the interface, at least a portion of the electrical components disposed on the circuit board are arranged inside the diameter of the interface.

2. The lens device according to claim 1, wherein, The diameter of the interface is relative to the fitting diameter of the imaging device.

3. The lens device according to claim 1, wherein, When viewed from a direction orthogonal to each of the distance direction between the two first optical axes of the first optical system and the second optical system, the circuit board is positioned between the two first optical axes.

4. The lens device according to claim 1, wherein, The circuit board is positioned on the extension line of the third optical axis.

5. The lens device according to claim 1, wherein, The substrate surface of the circuit board is perpendicular to the axial direction of the interface.

6. The lens device according to claim 1, wherein, The substrate surface of the circuit board is parallel to each of the distance direction between the two first optical axes of the first optical system and the first optical axis direction of the second optical system.

7. The lens device according to claim 1, further comprising a base component for mounting the first optical system, the second optical system, and the circuit board. in, The first optical system, the second optical system, and the circuit board are movable integrally with the base member relative to the interface in the first optical axis direction.

8. The lens device according to claim 7, wherein, The circuit board includes a fixing part, and the circuit board is fixed to the base member at the fixing part. The fixing part is configured not to overlap with the lens and the retainer in each of the first optical system and the second optical system when viewed from the axial direction of the interface.

9. The lens device according to claim 1, further comprising a first flexible substrate, wherein, The interface is provided with a communication unit configured to communicate with the imaging device. The circuit board is provided with a first connector, and The first flexible substrate electrically interconnects the communication unit and the first connector and extends in the axial direction of the interface.

10. The lens device according to claim 9, further comprising a base component for mounting the first optical system, the second optical system, and the circuit board. in, The first flexible substrate passes through a through hole formed on the base member.

11. The lens device according to claim 9, further comprising: Electronic components, which are controlled by the circuit board; as well as A second flexible substrate, which is electrically connected to the electronic component. in, The circuit board includes a second connector connected to the second flexible substrate, and The second connector is symmetrically configured around the axis of the interface.

12. The lens device according to claim 11, wherein, When viewed from the axial direction of the interface, the first connector and the second connector are configured not to overlap with the lens and the retainer in each of the first optical system and the second optical system.

13. The lens device according to claim 1, wherein, When viewed from the direction of the first optical axis or from a direction orthogonal to each of the distance directions between the two first optical axes of the first optical system and the second optical system, the circuit board includes an area that overlaps with the lens or optical component forming the second optical axis in each of the first optical system and the second optical system.

14. The lens device according to claim 1, wherein, The substrate surface of the circuit board is rectangular.

15. A lens device comprising: An interface for mounting the lens device to an imaging device; as well as A circuit board configured to communicate with the imaging device. in, The lens has a first lens included in a first optical system and a second lens included in a second optical system. Each of the first and second optical systems is a curved optical system having a first reflecting surface and a second reflecting surface, and sequentially includes, starting from the subject side, a first optical axis, a second optical axis of light reflected by the first reflecting surface, and a third optical axis of light reflected by the second reflecting surface. The circuit board is positioned between the two first optical axes of the first optical system and the second optical system, and is disposed on the subject side of the second optical axis and on the axis of the interface.

16. An imaging device comprising: Imaging sensor; as well as The lens device according to claim 1 or 15.

17. The imaging device according to claim 16, wherein, The imaging sensor simultaneously captures two images with parallax formed by the first optical system and the second optical system.

Images