Lens apparatus and image pickup apparatus

Abstract

The present invention provides a lens apparatus including a driving unit such as a diaphragm driving unit, in which an increase in size is suppressed.SOLUTION: According to an aspect of the present invention, there is provided a lens apparatus including a mount including a contact surface configured to contact an exterior member, an optical system including a plurality of lenses, a lens holding barrel configured to hold at least one of the plurality of lenses, a first driving unit configured to move the lens holding barrel forward and backward in a direction along an optical axis of the optical system, a light amount adjustment unit including a second driving unit configured to adjust a light amount of the optical system, and a restriction member including a restriction portion configured to restrict a position of the light amount adjustment unit in the direction along the optical axis. At least a part of the lens held by the lens holding barrel is disposed closer to an image pickup surface side than the contact surface in a direction along the optical axis, and the first driving portion, the second driving portion, and the restriction portion are disposed at different positions in a plane orthogonal to the optical axis.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The disclosure herein relates to a lens apparatus and an imaging apparatus. [Background technology]

[0002] Various proposals have been made to reduce the size of lens devices. Patent Document 1 discloses a lens device in which a drive unit that moves the lens back and forth along the optical axis is positioned so as to intersect the contact surface between the lens mount and the camera mount at a position along the optical axis. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-181368 Summary of the Invention [Problem to be solved by the invention]

[0004] Depending on the lens device, the outer diameter of the lens located closer to the image sensor may be larger to prevent oblique incidence on the sensor, or the outer diameter may be larger due to the use of a twin lens. In cases where the lens occupies a large proportion of the mount inner diameter, such as in large-diameter lenses or twin lenses, it is difficult to locate the various drive units, such as the lens drive unit and aperture drive unit, on the mount inner diameter. Furthermore, if the drive units are located closer to the subject than the mount, the phases of the drive units and the aperture's optical axis control unit may overlap in a plane perpendicular to the optical axis, which could result in an increase in the outer diameter of the lens device. [Means for solving the problem]

[0005] A lens device according to an embodiment of the present invention comprises a mount having an abutment surface that abuts against an exterior member, an optical system including a plurality of lenses, a lens holding barrel that holds at least one of the plurality of lenses, a first drive unit that can move the lens holding barrel back and forth in a direction along the optical axis of the optical system, a light intensity adjustment unit that includes a second drive unit that can adjust the light intensity of the optical system, and a regulating member that has a regulating unit that regulates the position of the light intensity adjustment unit in a direction along the optical axis, wherein at least a portion of the lens held by the lens holding barrel is positioned closer to the imaging surface than the abutment surface in the direction along the optical axis, and the first drive unit, the second drive unit, and the regulating unit are positioned at different positions from each other in a plane perpendicular to the optical axis. [Effects of the Invention]

[0006] It is possible to provide a lens device having a drive unit such as an aperture drive unit, in which an increase in size is suppressed. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view of a lens device and an imaging device according to a first embodiment; [Figure 2] FIG. 1 is an exploded perspective view of a lens unit according to a first embodiment. [Figure 3] FIG. 1 is an exploded perspective view of a lens unit according to a first embodiment. [Figure 4] Cross-sectional view of the lens unit of the first embodiment. [Figure 5] 1 is a cross-sectional view of a lens device according to a first embodiment. [Figure 6] 1 is a cross-sectional view of a lens device according to a first embodiment. [Figure 7] FIG. 10 is an exploded perspective view of a lens unit according to a second embodiment. [Figure 8] FIG. 10 is an exploded perspective view of a lens unit according to a second embodiment. [Figure 9] Cross-sectional view of a lens unit according to a second embodiment [Figure 10] 10 is a cross-sectional view of a lens device according to a second embodiment. [Figure 11] 10 is a cross-sectional view of a lens device according to a second embodiment. [Figure 12] 10 is a cross-sectional view of a lens device according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In each drawing, the same components are designated by the same reference numerals, and duplicated explanations will be omitted. This embodiment relates to a lens device having a drive unit.

[0009] FIG. 1 is a schematic diagram showing an imaging system. As shown in FIG. 1, the imaging system includes a lens apparatus 100 and a camera body 200. The camera body 200 includes an imaging element. The imaging element receives light from the lens apparatus 100. The lens apparatus 100 includes a lens unit 101 that guides light from an object to the imaging element. The lens apparatus 100 is attached to the camera body 200. The lens apparatus 100 may be detachable from the camera body 200, and is configured to be detachable from the camera body 200 using a mount (not shown). The lens apparatus 100 includes a control unit (not shown), a lens drive instruction means, and a contact unit capable of communicating with the camera body 200. The camera body 200 includes a control unit (not shown), an imaging element, and a contact unit capable of communicating with the lens apparatus 100. Alternatively, the lens apparatus 100 may be integrated with the camera body 200.

[0010] (Embodiment 1) 2 and 3 are exploded perspective views showing the configuration of the lens unit 101 (lens apparatus 100) according to the first embodiment of the present invention.

[0011] The lens unit 101 has an optical system including multiple lenses. The lens unit 101 has, from the object side to the imaging surface side along an optical axis 300, a first lens 102, a second lens 104, a third lens 106, and a fourth lens 108. The lens unit 101 also has a first lens retaining barrel 103 that holds the first lens 102, a second lens retaining barrel 105 that holds the second lens 104, a third lens retaining barrel 107 that holds the third lens 106, and a fourth lens retaining barrel 109 that holds the fourth lens 108. The lens unit 101 also has a base 110 (base member) that holds the first lens retaining barrel 103, the second lens retaining barrel 105, the third lens retaining barrel 107, and the fourth lens retaining barrel 109. The third lens retaining barrel 107 is held to the base 110 by rollers 111 and screws 112.

[0012] The lens unit 101 also has a light intensity adjustment section 113. The light intensity adjustment section 113 has a light intensity adjustment drive section 113b (second drive section) for exposing and retracting aperture blades (not shown) from an opening 113a to enable light intensity adjustment. The light intensity adjustment drive section 113b is composed of a light intensity adjustment drive source 113c and a gear section 113d, and is electrically connected to a fixed substrate (not shown) by a flexible substrate (not shown). The position of the light intensity adjustment section 113 in the direction along the optical axis 300 is restricted by a restricting section 105a of a second lens holding barrel 105 (restricting member) and the base 110. The second lens holding barrel 105 is held to the base 110 with screws 114.

[0013] The lens unit 101 has a first drive unit 115 that drives the fourth lens retaining barrel 109 so that it can move back and forth in a direction along the optical axis 300. The first drive unit 115 is composed of a focus drive source 116 and a screw unit 117. The first drive unit 115 is fixed to the base 110 with screws 118. The first drive unit 115 is also electrically connected to a fixed substrate (not shown) by a flexible substrate (not shown). The fourth lens retaining barrel 109 is equipped with a rack 119 that screws onto the screw unit 117 and a spring 120 for removing backlash. The fourth lens retaining barrel 109 is held by a guide bar 121 (guide member) that is sandwiched between the second lens retaining barrel 105 and the base 110, and a guide unit 110a of the base 110 so that it can be guided straight forward without any backlash.

[0014] The first lens holding barrel 103 has a cam follower 103a, and the base 110 has a follower portion 110b. The cam follower 103a of the first lens holding barrel 103 and the follower portion 110b of the base 110 are fitted into the rectilinear groove 122a of the guide barrel 122 and the cam groove 123a of the cam ring 123, and are held so as to be able to advance and retreat in the direction along the optical axis 300.

[0015] The lens unit 101 also has a fifth lens 124 and a fifth lens holding barrel 125 that holds the fifth lens 124. The fifth lens holding barrel 125 is fixed to the guide barrel 122 with screws 126. The lens device 100 has a front ring 127 and an exterior member 128, and the front ring 127 is held by the exterior member 128 via a bayonet connection.

[0016] The lens device 100 has a focus ring 129 and a zoom ring 130. The focus ring 129 and the zoom ring 130 are rotatably held at fixed positions by a front ring 127 and an exterior member 128. The amount and direction of rotation of the focus ring 129 are detected by a flexible substrate (detector) (not shown) electrically connected to a fixed substrate (not shown). Based on the detection result, the first drive unit 115 is driven to move the fourth lens retaining barrel 109 forward and backward in a direction along the optical axis 300, thereby performing focus adjustment. The zoom ring 130 is connected to a cam ring 123 by a key member (not shown), and moves the first lens retaining barrel 103 and the base 110 forward and backward in a direction along the optical axis 300 in response to the zoom ring 130's rotation. The amount and direction of rotation of the zoom ring 130 are detected by a flexible substrate (detector) (not shown) electrically connected to a fixed substrate (not shown).

[0017] The lens device 100 has a fixed barrel 131 and a mount 133. The fixed barrel 131 is held to the exterior member 128 with screws 132. The mount 133 has an abutment surface 133a that abuts against an abutment surface 131a provided on the fixed barrel 131, and is fixed with screws 134. The mount 133 also has a bayonet portion 133b that is bayonet-coupled to a mount (camera mount) provided on the camera body. The lens device 100 is detachably held to the camera body 200 by the bayonet portion 133b. The mount 133 holds contact portions (not shown) that are electrically connected to a fixed substrate (not shown), and are electrically connected to the contact portions held by the camera mount.

[0018] Fig. 4 is a diagram showing a cross section perpendicular to the optical axis 300 of the lens device 100 according to the first embodiment of the present invention. As shown in Fig. 4, in a plane (cross section) perpendicular to the optical axis 300 of the lens device 100, the restriction unit 105a, the light amount adjustment drive unit 113b, the first drive unit 115, and the guide bar 121 are arranged in phases (positions where they do not overlap) with one another.

[0019] 5 and 6 are diagrams showing a cross section including an optical axis 300 of the lens device 100 according to the first embodiment of the present invention. The fourth lens 108 held by the fourth lens holding barrel 109 is disposed closer to the imaging surface than the abutment surface 133a of the mount 133 in the direction along the optical axis 300. Furthermore, the focus drive source 116 of the first drive unit 115 and the light amount adjustment drive unit 113b of the light amount adjustment unit 113 are disposed closer to the subject than the fourth lens 108 and closer to the subject than the abutment surface 133a in the direction along the optical axis 300.

[0020] Placing the focus lens driver on the mount inner diameter would result in a larger diameter, and arranging the focus lens driver and the diaphragm driver in the same phase (overlapping in the direction along the optical axis) would likely result in a longer overall length. In the lens device of this embodiment, the focus driver source 116 and the light intensity adjustment driver 113b are arranged at different phases in a plane perpendicular to the optical axis, while the fourth lens 108 (focus lens) is arranged closer to the image plane than the driver (at least partially overlapping with the mount inner diameter). This arrangement allows the lens device to be made more compact.

[0021] That is, in the direction along optical axis 300, fourth lens 108, which is driven by first drive unit 115, is disposed inside mount 133, and light intensity adjustment drive unit 113b and first drive unit 115 are disposed closer to the subject than contact surface 133a, which has ample space. Then, in a plane perpendicular to optical axis 300, restriction unit 105a, which restricts the position of light intensity adjustment unit 113 in the direction along optical axis 300, light intensity adjustment drive unit 113b, first drive unit 115, and guide bar 121 are disposed in non-overlapping phases (non-overlapping positions). With this configuration, the diameter of the lens device can be reduced even with a short-back large-diameter lens, thereby achieving compactness.

[0022] Furthermore, the focus drive source 116 and the light amount adjustment drive source 113c are disposed on the subject side of the opening 113a of the light amount adjustment unit 113 in the direction along the optical axis 300. Furthermore, the first drive unit 115 and the light amount adjustment drive unit 113b are disposed so as to overlap with the restriction portion 105a and the second lens 104 of the second lens holding cylinder 105 in the direction along the optical axis 300. In other words, the restriction portion 105a and the second lens 104 are disposed in a plane perpendicular to the optical axis 300.

[0023] Furthermore, by arranging first drive unit 115 and light intensity adjustment drive unit 113b so that they overlap guide bar 121 in the direction along optical axis 300, the overall length of the lens device can be shortened, thereby achieving miniaturization. In other words, first drive unit 115, light intensity adjustment drive source 113c, and guide bar 121 are arranged in a plane perpendicular to optical axis 300. Also, by arranging focus drive source 116 and light intensity adjustment drive unit 113b on the subject side of opening 113a of light intensity adjustment unit 113 in the direction along optical axis 300, a configuration can be realized that can reduce the influence of magnetic noise while miniaturizing the lens device.

[0024] (Embodiment 2) 7 and 8 are exploded perspective views showing the configuration of a lens unit 401 (lens apparatus 100) according to the second embodiment of the present invention.

[0025] The lens unit 401 has a first optical system with a first optical axis 500 and a second optical system with a second optical axis 600. In this embodiment, the first optical system and the second optical system are arranged in parallel, and both the first optical system and the second optical system are coaxial optical systems. The first optical system is composed of a first lens 501, a second lens 502, and a third lens 506, arranged from the object side to the imaging plane side along the first optical axis 500. The second optical system is composed of a first lens 601, a second lens 602, and a third lens 606, arranged from the object side to the imaging plane side along the second optical axis 600.

[0026] The lens unit 401 has a first lens holding barrel 402 that holds a first lens 501 and a first lens 601, a second lens holding barrel 503 that holds a second lens 502, and a second lens holding barrel 603 that holds a second lens 602. The second lens holding barrel 503 is fixed to the first lens holding barrel 402 and its position is determined using rollers 504 and screws 505. The rollers 504 in this embodiment are eccentric rollers that allow the position of the second lens holding barrel 503 to be adjusted. The second lens holding barrel 603 is similarly fixed to the first lens holding barrel 402 and its position is determined using rollers 604 and screws 605. The rollers 604 in this embodiment are eccentric rollers that allow the position of the second lens holding barrel 603 to be adjusted. The first lens holding barrel 402 is fixed to a base 403 (base member) with screws 404 and its position is determined.

[0027] Furthermore, the lens unit 401 has a third lens holding barrel 507 that holds a third lens 506, and a third lens holding barrel 607 that holds a third lens 606. The third lens holding barrel 507 is fixed to the base 403 with a screw 508, and its position is determined. The third lens holding barrel 607 functions as an adjustment unit that adjusts the focus difference between the first optical system and the second optical system.

[0028] The lens unit 401 has a focus difference adjustment drive unit 608. The focus difference adjustment drive unit 608 is made up of a focus difference adjustment drive source 609 (first drive unit) and a screw unit 610. The third lens holding barrel 607 is equipped with a rack 611 that screws into the screw unit 610 of the focus difference adjustment drive unit 608 and a spring 612 for removing backlash. The third lens holding barrel 607 is configured to be able to advance and retreat in a direction along the second optical axis 600 without backlash relative to a guide bar 613 (guide member) that is sandwiched between the first lens holding barrel 402 and the base 403, and a guide unit 403a of the base 403.

[0029] The focus difference adjustment drive unit 608 is electrically connected to a fixed substrate (not shown) via a flexible substrate (not shown). The focus difference adjustment drive unit 608 is fixed to the base 403 with screws 614. In this embodiment, the focus difference adjustment drive unit 608 adjusts the focus difference between the first optical system and the second optical system by driving only the third lens holding barrel 607. Therefore, the drive load of the focus difference adjustment drive unit 608 is light, so the drive actuator (focus difference adjustment drive source 609) can be made smaller, and the lens device can be made more compact. Furthermore, because the third lens holding barrel 507 is a fixed group, this embodiment provides higher accuracy in focus difference adjustment than a configuration in which the third lens holding barrel 507 is used as the focus adjustment group.

[0030] The lens unit 401 also has a light amount adjustment unit 405. The light amount adjustment unit 405 has a light amount adjustment drive unit 405c (second drive unit) for exposing and retracting diaphragm blades (not shown) from an opening 405a corresponding to the first optical system and an opening 405b corresponding to the second optical system, respectively, to adjust the amount of light. The light amount adjustment drive unit 405c is composed of a light amount adjustment drive source 405d and a gear unit 405e, and is electrically connected to a fixed substrate (not shown) by a flexible substrate (not shown). The position of the light amount adjustment unit 405 in the direction along the first optical axis 500 (second optical axis 600) is restricted by a restricting portion 402a and a base 403 of the first lens holding barrel 402 (restricting member).

[0031] The base 403 has a cam follower 403b. The cam follower 403b of the base 403 is inserted into a linear groove 407a of the guide cylinder 407 and a cam groove 408a of the cam ring 408. By rotation of the cam ring 408, the base 403 is held so as to be able to advance and retreat in the direction along the first optical axis 500 (second optical axis 600). The rotation range of the cam ring 408 is restricted by a screw 409.

[0032] The lens unit 401 has a focus driver 410 (third driver). The focus driver 410 is composed of a focus driver source 411 and a gear portion 412, and is fixed to the guide tube 407 with screws (not shown). The focus driver 410 is electrically connected to a fixed substrate (not shown) by a flexible substrate (not shown). The rotation of the focus driver source 411 rotates the cam ring 408 via the gear portion 412, and the focus driver 410 moves the base 403 forward and backward in a direction along the first optical axis 500 (second optical axis 600).

[0033] The lens device 100 of this embodiment has a focus ring 413, a front ring 414, an exterior member 415, and a mount 417. The focus ring 413 is sandwiched between the front ring 414 and the exterior member 415 so as to be rotatable at a fixed position. The exterior member 415 is fixed to the guide tube 407 with screws (not shown). The amount and direction of rotation of the focus ring 413 are detected by a flexible substrate (detector) (not shown) electrically connected to a fixed substrate (not shown). Based on the detection result, the focus driver 410 is driven to move the base 403 forward and backward in a direction along the first optical axis 500 (second optical axis 600), thereby performing focus adjustment. In addition, by switching a slide switch 416 held by the exterior member 415, a switch electrically connected to the fixed substrate (not shown) is switched by a flexible substrate (not shown) connected to the slide switch 416. By switching the switch, the focus adjustment mode is switched to a focus difference adjustment drive mode in which only the third lens holding cylinder 607 is driven by the focus difference adjustment drive unit 608 .

[0034] The mount 417 has an abutment surface 417a that abuts against an abutment surface 415a of the exterior member 415, and is fixed to the exterior member 415 with screws 418. The mount 417 also has a bayonet portion 417b that is bayonet-coupled to a mount (camera mount) provided on the camera body. The lens device 100 of this embodiment is detachably held to the camera body 200 by the bayonet portion 417b. The mount 417 holds contact portions (not shown) that are electrically connected to a fixed substrate (not shown), and is electrically connected to the contact portions held by the camera mount.

[0035] Fig. 9 is a diagram showing a cross section perpendicular to the first optical axis 500 and the second optical axis 600 of the lens device 400 according to the second embodiment of the present invention. As shown in Fig. 9, in a plane perpendicular to the first optical axis 500 (second optical axis 600) of the lens device 400, the restriction portion 402a, the light amount adjustment drive portion 405c, the focus difference adjustment drive portion 608 (screw portion 610), and the guide bar 613 are arranged at different positions.

[0036] FIGS. 10, 11, and 12 are diagrams showing cross sections of the lens device 400 according to the second embodiment of the present invention, taken along a direction parallel to the first optical axis 500 and the second optical axis 600. FIGS. 10, 11, and 12 each show different phases of the cross section of the lens device 400. FIG. 10 is a diagram showing a plane including the first optical axis 500 and the second optical axis 600. FIG. 11 is a diagram showing a plane including the light intensity adjustment drive unit 405c at the top and a plane including the focus difference adjustment drive unit 608 (focus difference adjustment drive source 609, screw portion 610) at the bottom. FIG. 12 is a diagram showing a plane including the focus drive source 411 at the top and a plane including the guide bar 613 at the bottom. The third lens 606 held by the third lens holding barrel 607 is disposed closer to the imaging plane than the abutting surface 417a of the mount 417 in the direction along the second optical axis 600 (first optical axis 500). In addition, the focus difference adjustment drive source 609 of the focus difference adjustment drive unit 608 and the light intensity adjustment drive source 405d of the light intensity adjustment unit 405 are arranged on the subject side of the abutment surface 417a in the direction along the first optical axis 500 and the second optical axis 600.

[0037] In other words, in the directions along the first optical axis 500 and the second optical axis 600, at least a portion of the third lens 606 driven by the focus difference adjustment drive unit 608 is disposed on the inner diameter of the mount 417 closer to the imaging surface than the abutment surface 417a. Also, the light intensity adjustment drive unit 405c (light intensity adjustment drive source 405d, gear portion 405e) and the focus difference adjustment drive unit 608 (focus difference adjustment drive source 609, screw portion 610) are disposed on the subject side of the abutment surface 417a, where there is more space. With this configuration, the diameter of the lens device can be reduced even with a short-back twin lens, thereby achieving compactness.

[0038] Furthermore, the focus drive source 411, the light intensity adjustment drive unit 405c, and the focus difference adjustment drive source 609 are arranged on the subject side of the openings 405a and 405b of the light intensity adjustment unit 405 in the direction along the first optical axis 500 (second optical axis 600). Furthermore, the light intensity adjustment drive unit 405c and the focus difference adjustment drive unit 608 (focus difference adjustment drive source 609, screw unit 610) are arranged so as to overlap the restriction unit 402a, the second lens 502, and the second lens 602 in the direction along the first optical axis 500 (second optical axis 600). In other words, the restriction unit 402a, the second lens 502, and the second lens 602 are arranged in a plane perpendicular to the first optical axis 500 (second optical axis 600).

[0039] Furthermore, by arranging the light intensity adjustment drive unit 405c and the focus difference adjustment drive unit 608 so that they overlap with the guide bar 613 in the direction along the first optical axis 500 and the second optical axis 600, the overall length of the lens device can be shortened, thereby achieving miniaturization. In other words, the light intensity adjustment drive unit 405c, the focus difference adjustment drive unit 608, and the guide bar 613 are arranged in a plane perpendicular to the first optical axis 500 (second optical axis 600). Furthermore, the light intensity adjustment drive source 405d and the focus difference adjustment drive source 609 are arranged closer to the subject than the openings 405a and 405b of the light intensity adjustment unit 405 in the direction along the first optical axis 500 and the second optical axis 600. By arranging them in this manner, a configuration can be realized that can reduce the influence of magnetic noise while miniaturizing the lens device. In addition, by arranging the focus drive source 411 on the subject side of the openings 405a and 405b of the light intensity adjustment unit 405 in the direction along the first optical axis 500 and the second optical axis 600, a configuration can be realized that can reduce the influence of magnetic noise.

[0040] The present invention is particularly applicable to lens devices having features such as rear focus, floating focus, and twin-lens optical systems.

[0041] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments and various modifications and changes are possible within the scope of the gist of the present invention.

[0042] Disclosure of embodiments of the present invention includes the following configurations.

[0043] (Configuration 1) a mount having a contact surface that contacts the exterior member; an optical system including a plurality of lenses; a lens holding barrel for holding at least one lens among the plurality of lenses; a first drive unit that can move the lens holding barrel back and forth in a direction along the optical axis of the optical system; a light amount adjusting unit including a second driving unit capable of adjusting the light amount of the optical system; a restricting member having a restricting portion that restricts the position of the light amount adjusting portion in a direction along the optical axis; At least a portion of the lens held by the lens holding barrel is disposed closer to the imaging surface than the contact surface in the direction along the optical axis, The lens device, wherein the first drive unit, the second drive unit, and the restriction unit are arranged at different positions in a plane perpendicular to the optical axis.

[0044] (Configuration 2) The lens device according to configuration 1, wherein the first drive unit has a first drive source and a screw unit, and the second drive unit has a second drive source and a gear unit.

[0045] (Configuration 3) The lens device described in configuration 2, wherein the first drive source and the second drive source are arranged on the object side of the contact surface in the direction along the optical axis, and are arranged on the object side of the opening of the light amount adjustment unit.

[0046] (Configuration 4) a base member for holding the lens holding barrel; a guide portion that guides the advancement and retreat of the lens holding barrel in a direction along the optical axis, The lens device according to any one of the first to third aspects, wherein the guide portion is held by the base member and the restricting portion.

[0047] (Configuration 5) The lens device described in configuration 4, wherein the guide portion, the first drive portion, the second drive portion, and the regulating portion are arranged at different positions from one another in a plane perpendicular to the optical axis.

[0048] (Configuration 6) the regulating member holds a lens different from the lens held by the lens holding barrel, The lens device described in any one of configurations 1 to 5, wherein the lens held by the regulating member, the first driving unit, and the second driving unit are arranged at different positions from each other in a plane perpendicular to the optical axis.

[0049] (Configuration 7) 7. The lens device according to any one of configurations 1 to 6, wherein the first driving section drives the lens for focus adjustment.

[0050] (Configuration 8) a second optical system arranged in parallel with the optical system and including a plurality of lenses; The lens device described in configuration 1, wherein the first drive unit moves the lens holding barrel back and forth in a direction along the optical axis to adjust the focus difference between the optical system and the second optical system.

[0051] (Configuration 9) 9. The lens device according to configuration 8, wherein the optical system and the second optical system are both coaxial optical systems.

[0052] (Configuration 10) the regulating member holds a lens different from the lens held by the lens holding barrel, The lens device described in configuration 8 or 9, wherein the lens held by the regulating member, the first driving unit, and the second driving unit are arranged in positions that overlap in the direction along the optical axis.

[0053] (Configuration 11) a base member for holding the lens holding barrel; 11. The lens device according to any one of configurations 8 to 10, further comprising a third drive unit that can move the base member back and forth in a direction along the optical axis.

[0054] (Configuration 12) 12. The lens device according to configuration 11, wherein the third driving unit drives the lens for focus adjustment.

[0055] (Configuration 13) 13. The lens device according to configuration 11 or 12, wherein the third drive unit is disposed on the object side of the contact surface in the direction along the optical axis.

[0056] (Configuration 14) A lens device according to any one of configurations 1 to 13; An imaging device comprising: a camera body having an imaging element that receives light from the lens device. [Explanation of symbols]

[0057] 100 Lens device 108 Fourth Lens 109 Fourth lens holding tube 113 Light intensity adjustment section 113a opening 113b Light intensity adjustment drive unit 114 Focus drive unit 115 Focus drive source 133 Mount 400 Lens Device 405 Light intensity adjustment section 410 Focus drive unit 411 Power Source 417 Mount 506, 606 third lens 608 Focus difference adjustment drive unit 609 Power Source

Claims

1. a mount having a contact surface that contacts the exterior member; an optical system including a plurality of lenses; a lens holding barrel for holding at least one lens among the plurality of lenses; a first drive unit capable of moving the lens holding barrel back and forth in a direction along the optical axis of the optical system; a light amount adjusting unit including a second driving unit capable of adjusting the light amount of the optical system; a restricting member having a restricting portion that restricts the position of the light amount adjusting portion in a direction along the optical axis; At least a portion of the lens held by the lens holding barrel is disposed closer to the imaging surface than the contact surface in the direction along the optical axis, The lens device, wherein the first drive unit, the second drive unit, and the restriction unit are arranged at different positions in a plane perpendicular to the optical axis.

2. 2. The lens device according to claim 1, wherein the first driving unit has a first driving source and a screw unit, and the second driving unit has a second driving source and a gear unit.

3. 3. The lens device according to claim 2, wherein the first drive source and the second drive source are arranged closer to the object side than the contact surface in the direction along the optical axis, and are arranged closer to the object side than the opening of the light amount adjustment unit.

4. a base member for holding the lens holding barrel; a guide member that guides the advancement and retreat of the lens holding barrel in a direction along the optical axis, 2. The lens device according to claim 1, wherein the guide member is held by the base member and the restricting portion.

5. 5. The lens device according to claim 4, wherein the guide member, the first drive unit, the second drive unit, and the restriction unit are arranged at different positions from one another in a plane perpendicular to the optical axis.

6. the regulating member holds a lens different from the lens held by the lens holding barrel, 2. The lens device according to claim 1, wherein the lens held by the regulating member, the first driving unit, and the second driving unit are arranged at different positions in a plane perpendicular to the optical axis.

7. 2. The lens device according to claim 1, wherein the first driving unit drives the lens for focus adjustment.

8. a second optical system arranged in parallel with the optical system and including a plurality of lenses; 2. The lens device according to claim 1, wherein the first drive unit moves the lens holding barrel back and forth in a direction along the optical axis to adjust a focus difference between the optical system and the second optical system.

9. 9. The lens device according to claim 8, wherein the optical system and the second optical system are both coaxial optical systems.

10. the regulating member holds a lens different from the lens held by the lens holding barrel, 9. The lens device according to claim 8, wherein the lens held by the regulating member, the first driving unit, and the second driving unit are arranged in positions that overlap in a direction along the optical axis.

11. a base member for holding the lens holding barrel; 9. The lens device according to claim 8, further comprising a third driving section that can move the base member back and forth in a direction along the optical axis.

12. The lens device according to claim 11 , wherein the third driving unit drives the lens for focus adjustment.

13. 12. The lens device according to claim 11, wherein the third drive unit is disposed on the object side of the contact surface in the direction along the optical axis.

14. A lens device according to any one of claims 1 to 13; An imaging device comprising: a camera body having an imaging element that receives light from the lens device.

Images