# US 11,029,483 B2 · Lens apparatus and image pickup apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,029,483 B2 - Document ID: US11029483B2 - Status: Granted - Kind: B2 - Application number: 16/363,478 - Filed: 2019-03-25 - Published: 2019-10-03 - Granted: 2021-06-08 - Earliest claimed: 2018-03-30 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Tomoyuki Nakamura - Web page: https://patentgrep.com/patent/US11029483B2 ## CPC - G02B 7/09: adapted for automatic focusing or varying magnification - G02B 7/10: by relative axial movement of several lenses, e.g. of varifocal objective lens - G02B 7/102: {controlled by a microcomputer (cameras with interchangeable lenses G03B17/14)} - G02B 7/28: Systems for automatic generation of focusing signals - G02B 15/16: with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group (G02B15/22 takes precedence) - G02B 27/646: {compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68)} - G03B 13/36: Autofocus systems - H04N 23/67: Focus control based on electronic image sensor signals - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Provided is a lens apparatus including: a first lens unit arranged closest to an object side and configured not to move for zooming; a zoom lens unit configured to move for zooming; an aperture stop; and an imaging lens unit arranged closest to an image side. The first lens unit includes a first focus lens unit configured to move for focusing. The imaging lens unit includes a second focus lens unit configured to move for focusing and to move for macro image pickup. The lens apparatus further includes a controller configured to control a position of the second focus lens unit for the macro image pickup based on a state of at least one of the first focus lens unit, the zoom lens unit, and the aperture stop. ## Claims ### Claim 1 A lens apparatus comprising: a first lens unit arranged closest to an object side and configured not to move for zooming; a zoom lens unit configured to move for zooming; an aperture stop; and an imaging lens unit arranged closest to an image side, wherein the first lens unit includes a first focus lens unit configured to move for focusing, wherein the imaging lens unit includes a second focus lens unit configured to move for correction of a focus deviation based on at least one of a position of the first focus lens unit, a position of the zoom lens unit, and an aperture size of the aperture stop, and to move for macro image pickup based on a command from an operating unit for the macro image pickup, and wherein the lens apparatus comprises a controller configured to selectively perform: a first control of causing the second focus lens unit to move for the correction with a movement amount of the second focus lens unit obtained by the controller based on the at least one of the position of the first focus lens unit, the position of the zoom lens unit, and the aperture size of the aperture stop; and a second control of causing the second focus lens unit to move for the macro image pickup with the movement amount obtained by the controller not based on the at least one of the position of the first focus lens unit, the position of the zoom lens unit, and the aperture size of the aperture stop, but based on the command. ### Claim 2 (depends on 1) The lens apparatus according to claim 1, wherein the controller is configured to perform change from the second control to the first control after returning the second focus lens unit to a position of the second focus lens unit at start of the second control. ### Claim 3 (depends on 1) The lens apparatus according to claim 1, wherein the controller is configured to perform change from the second control to the first control without returning the second focus lens unit to a position of the second focus lens unit at start of the second control. ### Claim 4 (depends on 1) The lens apparatus according to claim 1, wherein the controller is configured to perform the first control of causing the second focus lens unit to move for the correction with the movement amount obtained by the controller not based on the command. ### Claim 5 (depends on 1) The lens apparatus according to claim 1, wherein the controller is configured to perform the first control of causing the second focus lens unit to move for the correction and the macro image pickup with the movement amount obtained by the controller based on the at least one of the position of the first focus lens unit, the position of the zoom lens unit, and the aperture size of the aperture stop, and based on the command. ### Claim 6 (depends on 5) The lens apparatus according to claim 5, comprising a switching device for switching between the first control and the second control. ### Claim 7 (depends on 1) The lens apparatus according to claim 1, wherein the controller has information of a table for the correction with respect to the at least one of the position of the first focus lens unit, the position of the zoom lens unit, and the aperture size of the aperture stop. ### Claim 8 (depends on 5) The lens apparatus according to claim 5, wherein a conditional expression 0.5<(f2-m)/mp<1.5 is satisfied where m represents a movement amount of the second focus lens unit corresponding to the command, mp represents a movement amount of the second focus lens unit for the correction, and f2 represents an actual movement amount of the second focus lens unit. ### Claim 9 (depends on 5) The lens apparatus according to claim 5, wherein the controller is configured to cause the second focus lens unit to move for the correction based on a change in an f-number associated with a change in the at least one of the position of the first focus lens unit, the position of the zoom lens unit, and the aperture size of the aperture stop. ### Claim 10 (depends on 9) The lens apparatus according to claim 9, wherein a conditional expression 0.5<{(m+mf)/m}/ΔFno<1.5 is satisfied where m represents a movement amount of the second focus lens unit corresponding to the command, ΔFno represents a change rate of the f-number, and mf represents a movement amount of the second focus lens unit based on the change rate, wherein ΔFno is expressed by ΔFno=Fno1/Fno0 where Fno0 represents an f-number before change in the at least one of the position of the first focus lens unit, the position of the zoom lens unit, and the aperture size of the aperture stop at a time of the macro image pickup, and Fno1 represents an f-number after the change in the at least one of the position of the first focus lens unit, the position of the zoom lens unit, and the aperture size of the aperture stop at the time of the macro image pickup. ### Claim 11 (depends on 1) The lens apparatus according to claim 1, further comprising an extender lens unit configured to shift a focal length of the lens apparatus by insertion thereof into and removal thereof from an optical path in the lens apparatus, wherein the controller is configured to cause the second focus lens unit to move for the correction further based on which of the insertion or the removal. ### Claim 12 (depends on 1) The lens apparatus according to claim 1, further comprising a temperature detector configured to detect temperature, wherein the controller is configured to cause the second focus lens unit to move for the correction further based on the detected temperature. ### Claim 13 (depends on 1) The lens apparatus according to claim 1, further comprising a posture detector configured to detect a posture of the lens apparatus, wherein the controller is configured to cause the second focus lens unit to move for the correction further based on the detected posture. ### Claim 14 An image pickup apparatus comprising: a lens apparatus; and an image pickup element configured to pick up an image formed by the lens apparatus, wherein the lens apparatus comprises: a first lens unit arranged closest to an object side and configured not to move for zooming; a zoom lens unit configured to move for zooming; an aperture stop; and an imaging lens unit arranged closest to an image side, wherein the first lens unit includes a first focus lens unit configured to move for focusing, wherein the imaging lens unit includes a second focus lens unit configured to move for correction of a focus deviation based on at least one of a position of the first focus lens unit, a position of the zoom lens unit, and an aperture size of the aperture stop, and to move for macro image pickup based on a command from an operating unit for the macro image pickup, and wherein the lens apparatus comprises a controller configured to selectively perform: a first control of causing the second focus lens unit to move for the correction with a movement amount of the second focus lens unit obtained by the controller based on the at least one of the position of the first focus lens unit, the position of the zoom lens unit, and the aperture size of the aperture stop; and a second control of causing the second focus lens unit to move for the macro image pickup with the movement amount obtained by the controller not based on the at least one of the position of the first focus lens unit, the position of the zoom lens unit, and the aperture size of the aperture stop, but based on the command.