# US 2009/0262425 A1 · Image blur correction apparatus, and imaging apparatus or optical apparatus equipped with image blur correction apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2009/0262425 A1 - Document ID: US20090262425A1 - Status: Published application - Kind: A1 - Application number: 12/424,840 - Filed: 2009-04-16 - Published: 2009-10-22 - Earliest claimed: 2008-04-16 - Assignees: Canon Kabushiki Kaisha - Inventors: Masafumi Kimura - Web page: https://patentgrep.com/patent/US20090262425A1 ## CPC - G03B 5/00: Adjustment of optical system relative to image or object surface other than for focusing - 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 An image blur correction apparatus includes first and second lens units, a supporting unit aligning the first and second lens units in an optical axis direction, so that the first and second lens units can independently move in a direction perpendicular to the optical axis, a driving unit driving the first and second lens units in the direction perpendicular to the optical axis, a relative position detection unit detecting a relative position between the first and second lens units, a shake detection unit detecting a shake amount added to the image blur correction apparatus, and a control unit controlling the driving unit based on an output of the shake detection unit. The control unit performs closed-loop control based on an output of the relative position detection unit so that the second lens unit moves in a direction opposite to that of the first lens unit. ## Claims ### Claim 1 An image blur correction apparatus comprising: a first lens unit including a first correction lens; a second lens unit including a second correction lens having a power opposite to that of the first correction lens; a supporting unit configured to align the first lens unit and the second lens unit in a direction of an optical axis, so that the first lens unit and the second lens unit can independently move in a direction perpendicular to the optical axis; a driving unit configured to drive the first lens unit and the second lens unit; a relative position detection unit configured to detect a relative position between the first lens unit and the second lens unit; a shake detection unit configured to detect a shake amount added to the image blur correction apparatus; and a control unit configured to control the driving unit based on an output of the shake detection unit, wherein the control unit is configured to perform closed-loop control based on an output of the relative position detection unit so that the second lens unit moves in a direction opposite to that of the first lens unit. ### Claim 2 (depends on 1) The image blur correction apparatus according to claim 1, wherein the driving unit includes a coil attached to the first lens unit and a magnet attached to the second lens unit and located opposite the coil, and the driving unit is configured to drive the first lens unit and the second lens unit in mutually opposite directions using an interactive force generated when current flows through the coil. ### Claim 3 (depends on 1) The image blur correction apparatus according to claim 1, wherein the control unit is configured to perform feedback control based on the output of the shake detection unit so that the second lens unit moves in a direction opposite to a moving direction of the first lens unit according to an output of the relative position detection unit. ### Claim 4 (depends on 1) An imaging apparatus including the image blur correction apparatus according to claim 1. ### Claim 5 (depends on 1) An optical apparatus including the image blur correction apparatus according to claim 1. ### Claim 6 An image blur correction apparatus comprising: a first lens unit including a first correction lens; a second lens unit including a second correction lens having a power opposite to that of the first correction lens; a supporting unit configured to align the first lens unit and the second lens unit in a direction of an optical axis, so that the first lens unit and the second lens unit can independently move in a direction perpendicular to the optical axis; a driving unit configured to drive the first lens unit and the second lens unit; a first position detection unit configured to detect the position of the first lens unit relative to the stationary member; a second position detection unit configured to detect the position of the second lens unit relative to the first lens unit; a shake detection unit configured to detect a shake amount added to the image blur correction apparatus; and a control unit configured to control the driving unit based on an output of the shake detection unit, wherein the control unit is configured to perform closed-loop control so that the first lens unit moves based on an output of the first position detection unit and the second lens unit moves in a direction opposite to a moving direction of the first lens unit based on an output of the second position detection unit. ### Claim 7 (depends on 6) The image blur correction apparatus according to claim 6, wherein the driving unit includes a magnet attached to the stationary member, a first coil attached to the first lens unit and located opposite the magnet, and a second coil attached to the second lens unit and located opposite the magnet, and the driving unit is configured to drive the first lens unit and the second lens unit in mutually opposite directions using an interactive force generated when current flows through the first coil and the second coil in opposite directions. ### Claim 8 (depends on 6) The image blur correction apparatus according to claim 6, wherein the control unit is configured to perform feedback control based on the output of the shake detection unit so that the first lens unit moves based on the output of the first position detection unit and perform feedback control so that the second lens unit moves in a direction opposite to a moving direction of the first lens unit based on the output of the second position detection unit. ### Claim 9 (depends on 6) An imaging apparatus including the image blur correction apparatus according to claim 6. ### Claim 10 (depends on 6) An optical apparatus including the image blur correction apparatus according to claim 6. ### Claim 11 An image blur correction apparatus comprising: a first lens unit including a first correction lens; a second lens unit including a second correction lens having a power opposite to that of the first correction lens; a supporting unit attached to a stationary member and configured to support the first lens unit and the second lens unit so as to be movable relative to the stationary member along a plane perpendicular to an optical axis; a driving unit configured to drive the first lens unit and the second lens unit; a first position detection unit configured to detect the position of the first lens unit relative to the stationary member; a second position detection unit configured to detect the position of the second lens unit relative to the first lens unit; a shake detection unit configured to detect a shake amount added to the image blur correction apparatus; and a control unit configured to control the driving unit based on an output of the shake detection unit, wherein the control unit is configured to perform open-loop control so that the first lens unit moves based on an output of the first position detection unit and perform closed-loop control so that the second lens unit moves in a direction opposite to a moving direction of the first lens unit based on an output of the second position detection unit. ### Claim 12 (depends on 11) The image blur correction apparatus according to claim 11, wherein the driving unit includes a magnet attached to the stationary member, a first coil attached to the first lens unit and located opposite the magnet, and a second coil attached to the second lens unit and located opposite the magnet, and the driving unit is configured to drive the first lens unit and the second lens unit in mutually opposite directions using an interactive force generated when current flows through the first coil and the second coil in opposite directions. ### Claim 13 (depends on 11) The image blur correction apparatus according to claim 11, wherein the control unit is configured to perform feedback control based on the output of the shake detection unit so that the first lens unit moves based on the output of the first position detection unit and the second lens unit moves in a direction opposite to the moving direction of the first lens unit based on the output of the second position detection unit. ### Claim 14 (depends on 11) An imaging apparatus including the image blur correction apparatus according to claim 11. ### Claim 15 (depends on 11) An optical apparatus including the image blur correction apparatus according to claim 11.