# US 11,451,702 B2 · Image capturing system and driving method for reducing noise in a captured image > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,451,702 B2 - Document ID: US11451702B2 - Status: Granted - Kind: B2 - Application number: 17/055,634 - Filed: 2019-05-16 - Published: 2021-07-08 - Granted: 2022-09-20 - Earliest claimed: 2018-05-16 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Keiji Kunitomo; Jun Aoyama; Shohei Kosugi; Shun Kikuchi - Web page: https://patentgrep.com/patent/US11451702B2 ## CPC - H04N 23/663: for controlling interchangeable camera parts based on electronic image sensor signals - G02B 7/08: adapted to co-operate with a remote control mechanism - G02B 7/09: adapted for automatic focusing or varying magnification - 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 5/00: Adjustment of optical system relative to image or object surface other than for focusing - G03B 13/36: Autofocus systems - G03B 17/14: interchangeably - H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof - H04N 23/60: Control of cameras or camera modules - H04N 23/65: Control of camera operation in relation to power supply - H04N 23/667: Camera operation mode switching, e.g. between still and video, sport and normal or high- and low-resolution modes - H04N 23/685: {performed by mechanical compensation} - H04N 23/69: Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming - G03B 2205/0007: Movement of one or more optical elements for control of motion blur - G03B 2205/0046: Movement of one or more optical elements for zooming - G03B 2205/0069: using electromagnetic actuators, e.g. voice coils - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - 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) ## Abstract The present technique relates to a lens apparatus, a driving method, an image capturing apparatus, and an image capturing system that allow reduction of possible noise in a captured image caused by a magnetic field generated when an actuator of the lens apparatus is driven, without any change in image capturing processing of the image capturing apparatus. A lens apparatus is enabled to be mounted on an image capturing apparatus and includes an actuator, a communication section configured to receive, from the image capturing apparatus, drive frequency information used to set a drive frequency for the actuator, a control section configured to set the drive frequency for the actuator on the basis of the drive frequency information, and a driving section configured to drive the actuator at the drive frequency set. The present technique can be applied to, for example, a lens apparatus mounted on a single-lens reflex camera. ## Claims ### Claim 1 A lens apparatus enabled to be mounted on an image capturing apparatus, the lens apparatus comprising: an actuator; a communication section configured to receive, from the image capturing apparatus, drive frequency information used to set a drive frequency for the actuator, wherein the drive frequency information includes: a plurality of candidates for the drive frequency for the actuator, and a correspondence relation between a magnetic force of the lens apparatus and the plurality of candidates; a control section configured to set a first candidate of the plurality of candidates as the drive frequency for the actuator based on the magnetic force of the lens apparatus; and a driving section configured to drive the actuator at the set drive frequency. ### Claim 2 (depends on 1) The lens apparatus according to claim 1, wherein the control section is further configured to set the drive frequency for the actuator to the drive frequency included in the drive frequency information. ### Claim 3 (depends on 1) The lens apparatus according to claim 1, wherein, based on absence of the drive frequency information from the image capturing apparatus, the control section is further configured to set the drive frequency for the actuator to a default value. ### Claim 4 (depends on 1) The lens apparatus according to claim 1, wherein the drive frequency information further includes an upper limit value of the magnetic force of the lens apparatus at which value the drive frequency for the actuator need not be set in association with the image capturing apparatus, and the control section is further configured to set, when the magnetic force of the lens apparatus is equal to or lower than the upper limit value, the drive frequency for the actuator to a default value. ### Claim 5 (depends on 1) The lens apparatus according to claim 1, wherein the control section is further configured to set, as the drive frequency for the actuator, a second candidate of the plurality of candidates, and the second candidate corresponds to a drive frequency closest to a default value of the drive frequency for the actuator. ### Claim 6 (depends on 1) The lens apparatus according to claim 1, wherein, when the plurality of candidates includes no drive frequency that can be set, the control section is further configured to set the drive frequency for the actuator to a default value. ### Claim 7 (depends on 6) The lens apparatus according to claim 6, wherein the communication section is further configured to transmit, to the image capturing apparatus, information indicating that setting to any drive frequency included in the plurality of candidates is unavailable. ### Claim 8 (depends on 1) The lens apparatus according to claim 1, wherein the communication section is further configured to transmit, to the image capturing apparatus, information indicating whether the drive frequency for the actuator needs to be associated with the image capturing apparatus. ### Claim 9 (depends on 1) The lens apparatus according to claim 1, wherein the communication section is further configured to: transmit, to the image capturing apparatus, information including the magnetic force of the lens apparatus; and receive, from the image capturing apparatus, the drive frequency information corresponding to the magnetic force of the lens apparatus. ### Claim 10 A driving method, comprising: by a lens apparatus including an actuator and enabled to be mounted on an image capturing apparatus, receiving, from the image capturing apparatus, drive frequency information used to set a drive frequency for the actuator, wherein the drive frequency information includes: a plurality of candidates for the drive frequency for the actuator, and a correspondence relation between a magnetic force of the lens apparatus and the plurality of candidates; setting a specific candidate of the plurality of candidates as the drive frequency for the actuator based on the magnetic force of the lens apparatus; and driving the actuator at the set drive frequency. ### Claim 11 An image capturing apparatus in which a lens apparatus is enabled to be mounted, the image capturing apparatus, comprising: an image capturing element; an information generation section configured to generate drive frequency information used to set a drive frequency for an actuator included in the lens apparatus, wherein the drive frequency information includes: a plurality of candidates for the drive frequency for the actuator, and a correspondence relation between a magnetic force of the lens apparatus and the plurality of candidates; and a communication section configured to transmit the drive frequency information to the lens apparatus. ### Claim 12 (depends on 11) The image capturing apparatus according to claim 11, wherein the drive frequency information further includes an upper limit value of the magnetic force of the lens apparatus at which value the drive frequency for the actuator need not be set in association with the image capturing apparatus. ### Claim 13 (depends on 11) The image capturing apparatus according to claim 11, wherein the information generation section is further configured to generate the drive frequency information corresponding to a driving mode for the image capturing element. ### Claim 14 (depends on 13) The image capturing apparatus according to claim 13, wherein, when the driving mode for the image capturing element is changed, the communication section is further configured to transmit the drive frequency information to the lens apparatus. ### Claim 15 (depends on 11) The image capturing apparatus according to claim 11, wherein, when the lens apparatus is mounted, the communication section is further configured to transmit the drive frequency information to the lens apparatus. ### Claim 16 (depends on 11) The image capturing apparatus according to claim 11, wherein, when the drive frequency for the actuator needs to be changed, the communication section is further configured to transmit the drive frequency information to the lens apparatus. ### Claim 17 (depends on 11) The image capturing apparatus according to claim 11, wherein the communication section is further configured to receive, from the lens apparatus, information indicating whether the drive frequency for the actuator needs to be associated with the image capturing apparatus, and the communication section is further configured to transmit, when the drive frequency for the actuator needs to be associated with the image capturing apparatus, the drive frequency information to the lens apparatus. ### Claim 18 (depends on 11) The image capturing apparatus according to claim 11, wherein the communication section is further configured to receive, from the lens apparatus, information including the magnetic force of the lens apparatus, and the information generation section is further configured to generate the drive frequency information corresponding to the magnetic force of the lens apparatus. ### Claim 19 An image capturing system, comprising: an image capturing apparatus; and a lens apparatus mounted on the image capturing apparatus, wherein the image capturing apparatus includes: an information generation section configured to generate drive frequency information used to set a drive frequency for an actuator included in the lens apparatus, wherein the drive frequency information includes: a plurality of candidates for the drive frequency for the actuator, and a correspondence relation between a magnetic force of the lens apparatus and the plurality of candidates, and a first communication section configured to transmit the drive frequency information to the lens apparatus, and the lens apparatus includes: the actuator, a second communication section configured to receive the drive frequency information from the image capturing apparatus, a control section configured to set a specific candidate of the plurality of candidates as the drive frequency for the actuator based on the magnetic force of the lens apparatus, and a driving section configured to drive the actuator at the set drive frequency.