Lens device and imaging apparatus

Abstract

To improve operability in a lens device included in an optical system having a tilt effect or a shift effect.SOLUTION: A lens device includes: an optical system that has a plurality of optical elements and forms a subject image on an imaging element; movement means that moves at least one optical element of the plurality of optical elements in a direction orthogonal to an optical axis of the optical system; operation means that allows rotational operation about the optical axis of the optical system; and conversion means that is coupled to the operation means and the movement means, and converts the rotational operation of the operation means into movement of the movement means in the direction orthogonal to the optical axis. At least one optical element moves in the direction orthogonal to the optical axis to produce any one of a tilt effect and a shift effect.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lens device and an imaging device. [Background technology]

[0002] Conventionally, imaging devices such as single-lens reflex cameras are required to capture images according to various applications. One of the known applications is a lens device having an optical system with a tilt effect that tilts the focal plane so as to focus entirely on an object plane tilted with respect to the optical axis of the imaging optical system, or an optical system with a shift effect that changes (shifts) the photographic angle of view (Patent Documents 1-3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-91027 [Patent Document 2] Japanese Patent Application Publication No. 2023-135457 [Patent Document 3] Special Publication No. 2019-537755 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the operability and precision of moving the optical system to achieve the tilt or shift effect are low, the optical system cannot be moved to the position desired by the photographer, which may result in reduced shooting efficiency.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to improve the operability of a lens device having an optical system with a tilt effect or a shift effect. [Means for solving the problem]

[0006] The lens device of the present invention comprises an optical system having a plurality of optical elements and forming an image of a subject on an imaging element, a moving means for moving at least one of the plurality of optical elements in a direction perpendicular to the optical axis of the optical system, an operating means capable of rotating the optical element around the optical axis of the optical system, and a conversion means connected to the operating means and the moving means for converting the rotational operation of the operating means into movement of the moving means in a direction perpendicular to the optical axis, wherein the lens device is characterized in that the movement of the at least one optical element in the direction perpendicular to the optical axis produces either a tilt effect or a shift effect. [Effects of the Invention]

[0007] According to the present invention, it is possible to improve the operability of a lens device having an optical system with a tilt effect or a shift effect. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a lens device and a camera body that constitute a camera system. [Figure 2] FIG. 1 is an electrical configuration diagram of a camera system including a lens device and a camera body. [Figure 3] Diagram showing the Scheimpflug principle. [Figure 4] FIG. 2 is an exploded perspective view of a motion conversion means of the lens device. [Figure 5] 5A and 5B are diagrams showing the movement of a lens by a motion conversion means of a lens device. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same components, and redundant explanations will be omitted.

[0010] (First embodiment) The configuration of a camera system (image capture device) including a lens device 001 according to an embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is a cross-sectional view showing the configuration of the lens device 001 and camera body 002 that make up the camera system 000 according to an embodiment of the present invention. In this case, the optical axis direction of the lens device 001 is defined as the X axis, the pitch direction as the Y axis, and the yaw direction as the Z axis. Fig. 1 shows a cross section along the Z axis.

[0011] The camera body 002 has an imaging unit 1106 (image sensor). The lens device 001 is detachably attached to the camera body 002, which has an image sensor such as a CCD sensor or CMOS sensor. By controlling a shutter (not shown) with the camera CPU 1100, an image formed through the lens device 001 can be exposed to the imaging unit 1106 for any desired time, and captured. The camera also has a display unit 1108 with a touch panel function that can display captured images and set and change various functions of the camera system 000, and a finder 016 that can be looked into to check the captured image and input gaze information.

[0012] The lens device 001 has lenses as optical elements. The lens device 001 has a first group lens 021, a second group lens 022, a third group lens 023, a fourth group lens 024, a fifth group lens 025, a sixth group lens 026, a seventh group lens 027, and an eighth group lens 028. The optical axis of the optical system consisting of these lenses (multiple optical elements) is designated as optical axis 004. The optical system of the lens device 001 can form an image of a subject on an image sensor of a camera body 002. Each lens is held by a lens barrel having a cam follower (not shown), and changing the positional relationship along the optical axis 004 can change the focal length of the lens device 001. The lens device 001 also has an aperture mechanism 011 that changes the aperture diameter of the optical system via a lens CPU 1000. The user can change the aperture value of the aperture mechanism 011 by operating an aperture ring 020.

[0013] The first lens 021 can be driven in a direction along the optical axis 004 to adjust the focus. The first lens 021 is held by a lens barrel having a cam follower. The cam follower engages with a linear groove parallel to the optical axis of the guide barrel 007 and a cam groove inclined toward the optical axis of the cam barrel 008. The cam barrel 008 is rotatably supported on the guide barrel 007 by an actuator 031. Rotating around the optical axis 004, the first lens 021 moves along the linear groove provided in the guide barrel 007. The movement distance of the first lens 021 can be detected by a position detection unit (not shown). An autofocus operation that automatically focuses on a subject can be performed by operating a release switch 1102 (shown in FIG. 2) or a display unit 1108 (not shown) provided on the camera body 002. The lens device 001 can also be manually driven to a desired focus position by operating a focus ring 006 provided on the lens device 001. The focus adjustment configuration is not limited to the guide barrel 007 and the cam barrel 008, and may be configured to use a guide bar (not shown) that guides the first lens group 021 in the direction of the optical axis 004.

[0014] The second lens group 022 and the third lens group 023 are fixed groups that do not move along the optical axis. The second lens group 022 and the third lens group 023 are fixed to a base 042. In addition, a guide barrel 007 is fixed to the base 042.

[0015] The fourth group lens 024 and the sixth group lens 026 are configured to produce a tilt effect that tilts the focal plane relative to the imaging plane by driving each of them in the same direction perpendicular to the optical axis 004. The tilt effect can also be achieved by moving the fourth group lens 024 and the sixth group lens 026 in opposite directions. The fourth group lens 024 and the sixth group lens 026 are guided by a conversion member 036 and a first guide member 035 by operating a tilt operation ring 019 (operation member) and move in a direction perpendicular to the optical axis 004. The tilt operation ring 019 (operation member) can be rotated around the optical axis of the optical system. The configurations of the tilt operation ring 019, the conversion member 036, the fourth group lens 024, and the sixth group lens 026 will be described in detail below.

[0016] The fifth group lens 025 is sandwiched between the fourth group lens 024 and the sixth group lens 026, and is a fixed group that does not move in a direction perpendicular to the optical axis or along the optical axis. The seventh group lens 027 is also a fixed group that does not move along the optical axis. A base 041 that fixes the fifth group lens 025 and the seventh group lens 027 is also fixed to the lens apparatus.

[0017] The eighth lens group 028 is a fixed group that does not move along the optical axis. The base 300 fixes the eighth lens group 028 and rotatably supports the tilt operation ring 019 together with the base 041.

[0018] The lens device 001 has a mount 005 that can be connected and fixed to a mount (not shown) of the camera body 002. The mount 005 is fixed to a fixed portion 030. A whole rotation unit 029 is provided on the fixed portion 030 so as to be rotatable around the center of the mount 005. Rotation of the whole rotation unit 029 rotates all of the units provided on the lens device 001 closer to the subject than the fixed portion 030. A shift unit 032 is provided on the whole rotation unit 029 so as to be movable in a direction perpendicular to the optical axis 004. Operation of the shift operation unit 034 moves a part of the lens device 001 or all of the units provided on the subject side of the shift unit 032 in a direction perpendicular to the optical axis 004. In this embodiment, the shift operation unit 034 is a knob type, but it may also be a cylindrical operation ring with the optical axis 004 as its center of rotation. A TS rotation unit 033 is provided on the shift unit so as to be rotatable around the optical axis 004. By the rotation of the TS rotation unit 033, the units provided on the subject side of the lens device 001 from the TS rotation unit 033 rotate together.

[0019] In addition, the lens device 001 has a lens side electrical contact 1009 and a camera side electrical contact 1010 that connect the lens CPU 1000 of the lens device 001 and the camera CPU 1100 of the camera body 002, and the settings made on the camera side can be reflected in the lens device 001.

[0020] FIG. 2 is a diagram showing the electrical configuration of a camera system 000 (image capture device) including a lens device 001 and a camera body 002. As shown in FIG.

[0021] First, we will explain the control flow inside the camera body 002. The camera CPU 1100 is composed of a microcomputer. The camera CPU 1100 controls the operation of each part inside the camera body 002. When the lens device 001 is attached, the camera CPU 1100 also communicates with the lens CPU 1000 provided inside the lens device 001 via the lens side electrical contacts 1009 and the camera side electrical contacts 1010.

[0022] The information (signal) transmitted from the camera CPU 1100 to the lens CPU 1000 includes information on the drive amount and focus error information of the first lens 021. The information also includes attitude information of the camera body 002 based on a signal from a camera attitude detection unit 1110 such as an acceleration sensor (not shown). The information further includes subject distance information and focus error information based on a signal from a TS instruction unit 1109 that indicates the desired subject on which the photographer wants to focus, as well as information indicating the desired shooting range (field of view).

[0023] The information (signal) transmitted from the lens CPU 1000 to the camera CPU 1100 includes optical information such as the imaging magnification of the lens, and lens function information such as zoom (if a zoom lens) and vibration isolation (if an vibration isolation mechanism is present) installed in the attached lens device. Also included is attitude information from a lens attitude detection unit 1008 such as a gyro sensor or acceleration sensor.

[0024] The lens side electrical contacts 1009 and the camera side electrical contacts 1010 include contacts for supplying power from the camera body 002 to the lens device 001 .

[0025] The power switch 1101 is a switch that can be operated by the photographer, and can start the camera CPU 1100 and start supplying power to the actuators, sensors, etc. within the camera system. The release switch 1102 is a switch that can be operated by the photographer, and has a first stroke switch SW1 and a second stroke switch SW2. A signal from the release switch 1102 is input to the camera CPU 1100. In response to input of an ON signal from the first stroke switch SW1, the camera CPU 1100 enters a shooting preparation state. In the shooting preparation state, the photometry unit 1103 measures the brightness of the subject, and the focus detection unit 1104 performs focus detection.

[0026] The camera CPU 1100 calculates the aperture value of the aperture mechanism 011, the exposure amount (shutter time) of the imaging unit 1106, etc. based on the photometry result by the photometry unit 1103. Furthermore, the camera CPU 1100 determines the drive amount (including the drive direction) of the first lens 021, which is driven by the focus drive unit 1006 as a drive source, to achieve a focused state on the subject, based on focus information (defocus amount and defocus direction) which is the detection result of the focus state of the imaging optical system by the focus detection unit 1104. The above-mentioned drive amount information (drive amount information of the first lens 021) is transmitted to the lens CPU 1000. The lens CPU 1000 controls the operation of each component of the lens device 001.

[0027] Furthermore, the lens device 001 of this embodiment is configured to obtain a tilt effect that tilts the focal plane relative to the imaging plane by driving the fourth group lens 024 and the sixth group lens 026 in directions perpendicular to the optical axis 004. When the fourth group lens 024 and the sixth group lens 026 are electrically driven by actuators (not shown), the camera CPU 1100 calculates the tilt drive amount required to focus on the desired subject specified by the TS command unit 1109. Information about these drive amounts is sent from the camera CPU 1100 to the lens CPU 1000, which controls the drive of the fourth group lens 024 and the sixth group lens 026.

[0028] Here, multiple subjects may be specified by the TS specifying unit 1109. Even if the subjects are at different distances, it is possible to focus on them if they are on a tilted subject plane due to the tilt effect described above.

[0029] Furthermore, in the case of a lens device with an anti-shake function, when a predetermined shooting mode is entered, the camera CPU 1100 starts eccentric drive of the anti-shake lens (not shown), that is, control of the hand shake anti-shake operation (eccentric drive control).

[0030] When an ON signal is input from the second stroke switch SW2, the camera CPU 1100 sends an aperture drive command to the lens CPU 1000 to set the aperture mechanism 011 to the calculated aperture value. The camera CPU 1100 also sends an exposure start command to the exposure unit 1105 to open a shutter (not shown) and cause the image sensor of the image capturing unit 1106 to perform photoelectric conversion of the subject image, i.e., an exposure operation.

[0031] The imaging signal from the imaging unit 1106 is converted into a digital signal by a signal processing unit in the camera CPU 1100, and then subjected to various correction processes before being output as an image signal. The image signal (data) is recorded and saved in an image recording medium such as a semiconductor memory such as a flash memory, a magnetic disk, or an optical disk by an image recording unit 1107.

[0032] Furthermore, an image captured by the imaging unit 1106 can be displayed on a display unit 1108 that is a display using liquid crystal or organic EL technology during shooting. Furthermore, an image recorded in an image recording unit 1107 can also be displayed.

[0033] In recent years, this display has been equipped with touch operation technology, making it possible to select a subject and adjust the focus on the monitor for live view shooting. In other words, the TS instruction unit 1109 can be configured to be included in the display unit 1108.

[0034] Next, the internal control flow of the lens device 001 will be described. The focus operation rotation detection unit 1002 includes a focus operation ring 006 and a sensor (not shown) that detects its rotation. The aperture operation rotation detection unit 1011 includes an aperture operation ring 020 and a sensor (not shown) that detects its rotation. The zoom operation rotation detection unit 1003 includes a zoom operation ring and a sensor (not shown) that detects its rotation. This is the case when a zoom operation ring is installed in the lens device, while the lens device of this embodiment does not include a zoom operation ring. The subject storage unit 1012 defines and stores the spatial position of the subject in the shooting range designated by the TS designation unit 1109 or display unit 1108 using subject distance and spatial coordinates.

[0035] The TS operation detection unit 1001 includes a manual operation unit for obtaining tilt and shift effects, and a sensor (not shown) that detects the amount of operation. The IS drive unit 1004 includes a drive actuator for an anti-vibration lens (not shown) that performs anti-vibration operation, and its drive circuit. This structure is unnecessary for lens devices without anti-vibration functions.

[0036] The focus driver 1006 includes a first lens 021 that performs focusing operations, and an actuator 031 that moves the first lens 021 in the optical axis direction according to drive amount information. The drive amount information is determined based on a signal from the camera CPU 1100 described above. Alternatively, the focus operation / rotation detector 1002 can be operated to manually specify the focus position, and the drive amount information can be determined from that signal.

[0037] The electromagnetic diaphragm driver 1005 controls its drive source by the lens CPU 1000, which receives an aperture drive command from the camera CPU 1100, and operates the diaphragm mechanism 011 to an open state corresponding to the specified aperture value. It also operates in the same way when the photographer operates the aperture operation ring 020 to specify a desired aperture value.

[0038] The lens CPU 1000, which receives information on the subject distance, position information, and shooting range from the camera CPU 1100, controls the drive source of the TS driver 1007 to tilt the lens to the desired subject plane (focus plane) and shift the lens to obtain the desired shooting range. It goes without saying that the lens CPU 1000 controls the TS driver 1007 and the focus driver 1006 to operate optimally to obtain the desired focus. Furthermore, the lens device 001 of this embodiment has optical characteristics that allow the focus to change with the shift operation even if the subject distance does not change. It goes without saying that the TS driver 1007 and the focus driver 1006 are optimally controlled in accordance with these characteristics. However, this only applies when the tilt and shift operations of the lens device 001 are electrically driven by an actuator.

[0039] The gyro sensor (not shown) is disposed (fixed) inside the lens device 001 and electrically connected to the lens CPU 1000. The gyro sensor detects the angular velocities of vertical (pitch) and horizontal (yaw) shake, which are angular shakes of the camera system, and outputs the detected values ​​as angular velocity signals to the lens CPU 1000. The lens CPU 1000 electrically or mechanically integrates the angular velocity signals in the pitch and yaw directions from the gyro sensor to calculate the pitch shake amount and yaw shake amount (collectively referred to as the angular shake amount), which are the displacement amounts in the respective directions. The lens CPU 1000 controls the IS driver 1004 to shift and drive the vibration-proof lens based on the combined displacement amount of the angular shake amount and translational shake amount described above, thereby performing rotational shake correction and translational shake correction. As mentioned above, some lens devices do not have a vibration-proof function, in which case this structure / function is unnecessary. Furthermore, the lens CPU 1000 controls the focus driver 1006 based on the amount of focus shake to drive the first lens 021 in the optical axis direction, thereby correcting the focus shake.

[0040] FIG. 3 is a diagram illustrating the Scheimpflug principle. When the optical axis of the optical system in the lens apparatus 001 is tilted relative to the imaging unit 1106, the in-focus range on the subject side is determined by the Scheimpflug principle. FIG. 3(a) shows the in-focus range when the optical axis of the optical system is not tilted relative to the imaging plane, and FIG. 3(b) shows the in-focus range when the optical axis of the optical system is tilted relative to the imaging plane. The diagrams respectively show imaging plane 1200a, imaging plane 1200b, optical system 1201a, optical system 1201b, in-focus subject plane 1202a, subject plane 1202b, principal plane 1203a, and principal plane 1203b of the optical system. The Scheimpflug principle states that when imaging plane 1200b and principal plane 1203b of the optical system intersect at intersection 1204b on a line, as shown in FIG. 3(b), subject plane 1202b also passes through intersection 1204b.

[0041] When the subject to be photographed has depth, tilting the subject plane 1202b to follow that depth makes it possible to focus on the subject from the foreground to the background. When focusing on a depth area with a lens that does not have a tilt mechanism, the usual method is to narrow the aperture to increase the depth of field, but with a tilt lens, it is possible to focus on the depth even with the aperture wide open by tilting the lens.

[0042] Conversely, by tilting the principal plane of optical system 1201b in the opposite direction to the inclination of the subject with depth, it is possible to make subject plane 1202b intersect with the subject's depth direction at an angle close to a right angle. In this case, the in-focus range can be made extremely narrow, making it possible to obtain a so-called diorama-style image.

[0043] However, the lens apparatus of this embodiment generates a tilt θobj of the object plane 1202c by utilizing the image plane tilt caused by decentering the lens, rather than by tilting the optical system. However, if the Scheimpflug principle is applied to the lens principal plane 1203c and object plane 1202c in which tilt does not occur, an image plane tilt of an angle θimg should occur on the image pickup plane 1200c. Therefore, the lens 1201c of the lens apparatus 001 of this embodiment corrects this angle θimg, allowing the object plane to tilt without tilting the image pickup plane 1200c, enabling the desired object to be focused on.

[0044] On the other hand, if a predetermined imaging surface tilt correction effect is to be achieved, the amount of decentering of lens 1201c increases, resulting in greater compositional deviation. Therefore, this problem is solved by moving another lens designed to reduce aberration fluctuations during decentering, that is, by decentering the fourth-group lens 024 and sixth-group lens 026, which correspond to lens 1201c.

[0045] (Tilt control ring configuration) Next, a configuration that rotates the tilt operation ring 019 to drive the fourth lens group 024 and the sixth lens group 026 in a direction perpendicular to the optical axis 004, which is a main part of the embodiment of the present invention, will be described with reference to FIGS.

[0046] 4(a) is an exploded perspective view showing a configuration required to convert the rotational movement of the tilt operation ring 019 into drive in a direction perpendicular to the optical axis 004 of the fourth group lens 024 and the sixth group lens 026. FIG. 4(b) is a diagram showing the inner peripheral shape of the tilt operation ring 019.

[0047] The fourth group lens 024 is held integrally in the fourth group barrel 401. The sixth group lens 026 is held integrally in the sixth group barrel 402. Furthermore, the fourth group barrel 401 is fixed integrally to the sixth group barrel 402 with screws or adhesive (not shown). The sixth group barrel 402 is provided with a guide hole 403 through which a first guide member 035 is inserted, which restricts the movement direction of the sixth group barrel 402 to a direction perpendicular to the optical axis 004. Furthermore, a first cam groove 404 is provided at a certain angle with respect to the optical axis 004 in the phase where the guide hole 403 is provided in the sixth group barrel 402.

[0048] The tip of a cam pin 039 (first roller member) is slidably fitted into the first cam groove 404. A shaft portion that is slidable relative to the conversion member 036 is provided on the side of the cam pin 039 opposite the fitting portion with the first cam groove 404. Furthermore, a biasing member (not shown) is provided between the cam pin 039 and the conversion member 036, and biases the tip of the cam pin 039 toward the first cam groove 404, thereby suppressing backlash between the components. Note that the arrangement of the first cam groove and the first roller member may be reversed.

[0049] The conversion member 036 is provided with a second guide hole 406 through which a second guide member 405 is inserted, which restricts the movement direction of the conversion member 036 to the direction of the optical axis 004. The conversion member 036 is also provided with a cam roller 408 (second roller member) which slides in a second cam groove 407 provided on the inner periphery of the tilt operation ring 019. The second cam groove 407 is provided at a certain angle with respect to the optical axis 004 when the tilt operation ring 019 is unfolded. Note that the arrangement of the second cam groove and the second roller member may be reversed.

[0050] 5A and 5B are diagrams showing the movements of the fourth-group lens barrel 401 and the sixth-group lens barrel 402 when the tilt operation ring 019 is rotated. Fig. 5A shows a normal shooting state with no tilt effect, and Fig. 5B shows a tilt shooting state with the tilt effect obtained by rotating the tilt operation ring 019.

[0051] When the photographer rotates the tilt operation ring 019 for tilt photography, the second cam groove 407 provided on the inner circumference of the tilt operation ring 019 also rotates integrally. As the second cam groove 407 rotates, the position of the contact surface between the cam roller 408 and the second cam groove 407 changes. At this time, the tilt operation ring 019 rotates at a fixed position in the direction of the optical axis 004 by a bayonet portion (not shown). As the position of the tilt operation ring 019 in the direction of the optical axis 004 does not change, the change in the contact surface of the second cam groove 407 causes the cam roller 408 to move. The cam roller 408 is fixed to the conversion member 036, and the conversion member 036 moves in the direction of the optical axis 004 by the second guide member 405. Therefore, when the tilt operation ring 019 is rotated, the conversion member 036 can be moved in the direction of the optical axis 004.

[0052] When the tilt operation ring 019 is rotated, the conversion member 036 moves, causing the cam pin 039 to move in the direction of the optical axis 004. The cam pin 039 is slidably fitted in the first cam groove 404, and the cam pin 039 attempts to move along the first cam groove 404. However, because the movement of the conversion member 036 that holds the cam pin 039 is restricted in the direction of the optical axis 004, the driving force of the cam pin 039 is transmitted to the first cam groove 404 as a force in the direction of the optical axis 004. On the other hand, the sixth-group barrel 402 in which the first cam groove 404 is provided is restricted by the first guide member 035 from moving in a direction perpendicular to the optical axis 004. Therefore, the driving force of the cam pin 039 in the direction of the optical axis 004 causes the sixth-group barrel 402 having the first cam groove 404 to move in the direction perpendicular to the optical axis 004. Since the sixth group barrel 402 holds the fourth group barrel 401 integrally, the fourth group barrel 401 can also move in a direction perpendicular to the optical axis 004 in the same way.

[0053] With the above-described configuration, the rotation of the tilt ring 019 can drive the fourth-group barrel 401 and the sixth-group barrel 402 in a direction perpendicular to the optical axis 004 via the conversion member 036. This configuration allows the rotation of the tilt ring 019 to be converted into a direction perpendicular to the optical axis via the cam mechanism of the first cam groove 404 and the second cam groove 407, thereby increasing the operating distance. The increased operating distance increases the movement resolution in the direction perpendicular to the optical axis, thereby improving the accuracy with which the photographer can move the fourth-group barrel 401 and the sixth-group barrel 402 to the desired positions. Furthermore, because the tilt ring 019 is operated by a rotation about the optical axis, similar to the focus ring 006 and the aperture ring 020, there is no need to learn a new operating method for tilt photography.

[0054] Furthermore, even when the mass of the lens to be driven increases, by changing the angles of the two cam grooves, the first cam groove 404 and the second cam groove 407, it is possible to suppress the increase in operating torque and reduce the impact on the operating feel.

[0055] Furthermore, the cam roller 408 in this embodiment may be an eccentric roller in which the axis of the attachment portion to the conversion member 036 and the axis of the sliding portion of the second cam groove 407 are eccentric. By using an eccentric roller, even if a tilt effect occurs when the tilt operation ring 019 is in the non-tilt shooting position due to assembly variations or part errors, the eccentric roller can be rotated to move the conversion member 036 and make an adjustment.

[0056] Furthermore, although the present embodiment has been described as a configuration in which the movement is converted using cam grooves and rollers, a gear-coupled configuration using gears as the conversion unit may also be used. The lens device of this embodiment has been described as a case in which the lens is moved in a direction perpendicular to the optical axis to obtain a tilt effect, but the lens may also be moved in a direction perpendicular to the optical axis to obtain a shift effect, in which the shooting range is moved.

[0057] With the lens device of this embodiment, the optical system can be moved to a desired position without the operating accuracy being affected by the controllability or stopping accuracy of the drive actuator. Also, compared to the conventional method of achieving a tilt effect by tilting the entire lens barrel using a lever connected to a cylindrical operating ring, operability is improved.

[0058] Disclosure of embodiments of the present invention includes the following configurations.

[0059] (Configuration 1) an optical system having a plurality of optical elements and forming an image of a subject on an imaging element; a moving means for moving at least one optical element among the plurality of optical elements in a direction perpendicular to the optical axis of the optical system; an operating means capable of rotating the optical system around the optical axis; a conversion means connected to the operation means and the movement means for converting a rotational operation of the operation means into a movement of the movement means in a direction perpendicular to the optical axis, A lens device characterized in that the at least one optical element moves in a direction perpendicular to the optical axis, thereby producing either a tilt effect or a shift effect.

[0060] (Configuration 2) The lens device described in configuration 1, characterized in that the conversion means and the movement means are connected by a first cam groove provided on one side and a first roller member provided on the other side that slides in the first cam groove.

[0061] (Configuration 3) The lens device described in configuration 1 or 2, characterized in that the conversion means and the operating means are connected by a second cam groove provided on one side and a second roller member provided on the other side that slides in the second cam groove.

[0062] (Configuration 4) 4. The lens device according to any one of configurations 1 to 3, wherein the moving means has a first guide member that guides the at least one optical element in a direction perpendicular to the optical axis of the optical system.

[0063] (Configuration 5) 5. The lens device according to any one of configurations 1 to 4, wherein the conversion means has a second guide member that guides in a direction along the optical axis.

[0064] (Configuration 6) 2. The lens device according to configuration 1, wherein the conversion means and the movement means are connected by a gear.

[0065] (Configuration 7) 2. The lens device according to claim 1, wherein the conversion means and the operation means are connected by a gear.

[0066] (Configuration 8) a lens device according to any one of configurations 1 to 7; an imaging device comprising an imaging element for capturing an image of a subject through the lens device;

[0067] While the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments and various modifications and variations are possible within the scope of the present invention. The present invention can be applied to a lens device that can be attached to a camera body such as a single-lens reflex digital camera or a mirrorless camera. [Explanation of symbols]

[0068] 000 Camera System 001 Lens device 002 Camera body 019 Tilt control ring 036 Conversion material 039 Campin 401 4th group lens barrel 402 6 group lens barrel 403 Guide hole 404 First cam groove 405 Second guide member 406 Second guide hole 407 Second cam groove 408 Camcoro

Claims

1. an optical system having a plurality of optical elements and forming an image of a subject on an imaging element; a moving means for moving at least one optical element among the plurality of optical elements in a direction perpendicular to the optical axis of the optical system; an operating means capable of rotating the optical system around the optical axis; a conversion means connected to the operation means and the movement means for converting a rotational operation of the operation means into a movement of the movement means in a direction perpendicular to the optical axis, A lens device, characterized in that the at least one optical element moves in a direction perpendicular to the optical axis, thereby producing either a tilt effect or a shift effect.

2. 2. The lens device according to claim 1, wherein the conversion means and the movement means are connected by a first cam groove provided on one side and a first roller member provided on the other side and sliding in the first cam groove.

3. 2. The lens device according to claim 1, wherein the conversion means and the operating means are connected by a second cam groove provided on one side and a second roller member provided on the other side and sliding in the second cam groove.

4. 2. The lens device according to claim 1, wherein the moving means comprises a first guide member that guides the at least one optical element in a direction perpendicular to the optical axis of the optical system.

5. 2. The lens device according to claim 1, wherein the conversion means has a second guide member that guides the light in a direction along the optical axis.

6. 2. The lens device according to claim 1, wherein the conversion means and the movement means are connected by a gear.

7. 2. The lens device according to claim 1, wherein the conversion means and the operation means are connected by a gear.

8. A lens device according to any one of claims 1 to 7; an imaging device comprising an imaging element for capturing an image of a subject through the lens device;

Images