# US 5,708,864 A · Shake preventing apparatus in camera > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,708,864 A - Document ID: US5708864A - Status: Granted - Kind: A - Application number: 08/741,528 - Filed: 1996-11-01 - Granted: 1998-01-13 - Earliest claimed: 1992-01-14 - Assignees: Nikon Corporation - Inventors: Akira Katayama; Tadao Kai; Yoshio Imura; Nobuhiko Terui; Susumu Sato - Web page: https://patentgrep.com/patent/US5708864A ## CPC - G03B 5/04: Vertical adjustment of lens; Rising fronts - G03B 5/00: Adjustment of optical system relative to image or object surface other than for focusing - G03B 2205/0015: by displacing one or more optical elements normal to the optical axis - G03B 2207/005: involving control of motion blur - G03B 2217/005: Blur detection - 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 A shake preventing apparatus in a camera, comprises a shake detecting device for detecting an amount of shake upon small motion of the camera, a shake correcting device for correction-driving a photo taking optical system in a direction to keep an image on a plane of a film unshaken, based on the amount of shake detected by the shake detecting device, a shake correction limit determining device for determining a shake correction limit amount which is a limit for the shake correcting device to correct the shake, and a shutter controlling device for controlling a shutter to close when the amount of shake detected by the shake detecting device exceeds the shake correction limit amount determined. ## Claims ### Claim 1 A shake preventing apparatus in a camera, comprising: a shake detecting portion which detects an amount of shake upon small motion of the camera; a shake correcting portion which correction drives a photo taking optical system in a direction to keep an image on a plane of a film unshaken, based on the amount of shake detected by said shake detecting portion; a shake correction limit determining portion which determines a shake correction limit amount which is a limit for said shake correcting portion to correct the shake; and a shutter controlling portion which controls a shutter to close when said amount of shake detected by said shake detecting portion exceeds said shake correction limit amount. ### Claim 2 (depends on 1) A shake preventing apparatus according to claim 1, wherein said shutter controlling portion controls the shutter to close when said amount of shake detected by said shake detecting portion exceeds said shake correction limit amount determined and when an exposure amount received by the film is within a range of correct exposure amount. ### Claim 3 (depends on 2) A shake preventing apparatus according to claim 2, wherein said range of correct exposure amount is determined by exposure latitude of the film. ### Claim 4 (depends on 1) A shake preventing apparatus according to claim 1, wherein the correction-driving by said shake correcting portion is stopped when a predetermined time has elapsed after start of the closing of the shutter controlled by said shutter controlling portion, and thereafter operation of said shake detecting portion is stopped. ### Claim 5 (depends on 4) A shake preventing apparatus according to claim 4, wherein said predetermined time is a time enough to complete closing of the shutter. ### Claim 6 (depends on 2) A shake preventing apparatus according to claim 2, further comprising: a memory portion for storing an over limit flag when said shake correcting portion exceeds said shake correction limit amount after the shutter is opened; wherein said shutter controlling portion controls the shutter to be closed in case that the over limit flag is stored in said memory portion and that the exposure amount received by the film is within the range of correct exposure amount. ### Claim 7 (depends on 1) A shake preventing apparatus according to claim 1, wherein said shake correcting portion is constructed so that when said shake correction limit amount is reached in a direction of the correction-driving of said photo taking optical system, further correction-driving in said direction is inhibited, but correction-driving is permitted in another direction. ### Claim 8 A shake preventing apparatus in a camera, comprising: a shake detecting portion which detects an amount of shake upon small motion of the camera; a shake correcting portion which correction-drives a photo taking optical system in a direction to keep an image on a plane of a film unshaken, based on the amount of shake detected by said shake detecting portion; a shake correction limit determining portion which determines a shake correction limit amount which is a limit for said shake correcting portion to correct the shake; a mode setting portion which sets a shake prevention mode to give a priority to shake prevention; and a shutter controlling portion which controls a shutter to close when said shake prevention mode is set and said amount of shake detected by said shake detecting portion exceeds said shake correction limit amount, and which controls the shutter to close when said shake prevention mode is not set and when a correct exposure amount is reached, irrespective of whether said amount of shake detected by said shake detecting portion exceeds said shake correction limit amount. ### Claim 9 (depends on 8) A shake preventing apparatus according to claim 8, wherein said shutter controlling portion controls the shutter to close when said shake prevention mode is set, when said amount of shake detected by said shake detecting portion exceeds said shake correction limit amount and when an exposure amount received by a film is within a range of correct exposure amount. ### Claim 10 (depends on 9) A shake preventing apparatus according to claim 9, wherein said range of correct exposure amount is determined by exposure latitude of the film. ### Claim 11 A shake preventing apparatus in a camera, comprising: a shake detecting portion which detects an amount of shake upon small motion of the camera; a shake correcting portion which correction-drives a photo taking optical system in a direction to keep an image on a plane of a film unshaken, based on the amount of shake detected by said shake detecting portion; and a shutter controlling portion which controls opening and closing of a shutter; wherein the correction-driving by said shake correcting portion is stopped when a predetermined time has elapsed after the start of closing of the shutter controlled by said shutter controlling portion, and thereafter operation of said shake detecting portion is stopped operating. ### Claim 12 (depends on 11) A shake preventing apparatus according to claim 11, wherein said predetermined time is a time enough to complete closing of the shutter. ### Claim 13 A shake preventing apparatus in a camera, comprising: a shake detecting portion which detects an amount of shake upon small motion of the camera; a shake correcting portion which correction-drives a phototaking optical system in a direction to keep an image on a plane of a film unshaken, based on the amount of shake detected by said shake detecting portion; a shake correction limit determining portion which determines a shake correction limit amount which is a limit for said shake correcting portion to correct the shake; and a shutter controlling portion which controls a shutter to close when said correction-driving of said shake correcting portion reaches the shake correction limit amount determined by said shake correction limit determining portion. ### Claim 14 (depends on 13) A shake preventing apparatus according to claim 13, wherein said shutter controlling portion controls the shutter to close when said correction-driving of said shake correcting portion reaches the shake correction limit amount determined by said shake correction limit determining portion and when an exposure amount received by the film is within a range of correct exposure amount. ### Claim 15 (depends on 14) A shake preventing apparatus according to claim 14, wherein said range of correct exposure amount is determined by exposure latitude of the film. ### Claim 16 (depends on 13) A shake preventing apparatus according to claim 13, wherein said shake correction limit determining portion generates an electric signal in accordance with a correction-driving amount of said shake correction portion. ### Claim 17 A shake preventing apparatus in a camera, comprising: a shake detecting portion which detects an amount of shake upon small motion of the camera; a shake correcting portion which correction-drives a phototaking optical system in a direction to keep an image on a plane of a film unshaken, based on the amount of shake detected by said shake detecting portion; a shake correction limit determining portion which determines a shake correction limit amount which is a limit for said shake correcting portion to correct the shake; a mode setting portion which sets a shake prevention mode to give a priority to shake prevention; and a shutter controlling portion which controls a shutter to close when said shake prevention mode is set and said correction-driving of said shake correcting portion reaches the shake correction limit amount determined by said shake correction limit determining portion, and which controls the shutter to close when said shake prevention mode is not set and when a correct exposure amount is reached, irrespective of whether said correction-driving of said shake correcting device reaches the shake correction limit amount determined by said shake correction limit determining portion. ### Claim 18 (depends on 17) A shake preventing apparatus according to claim 17, wherein said shutter controlling portion controls the shutter to close, when said shake prevention mode is set, when said correction-driving of said shake correcting portion reaches the shake correction limit amount determined by said shake correction limit determining portion and when an exposure amount received by a film is within a range of correct exposure amount. ### Claim 19 (depends on 18) A shake preventing apparatus according to claim 18, wherein said range of correct exposure amount is determined by exposure latitude of the film. ### Claim 20 (depends on 17) A shake preventing apparatus according to claim 17, wherein said shake correction limit determining portion generates an electric signal in accordance with a correction-driving amount of said shake correction portion. ### Claim 21 A camera for preventing camera shake comprising: a photographing optical system; a shake detector which detects an amount of camera shake; a shake correcting portion which corrects the camera shake by varying at least a part of said photographing optical system in accordance with a detection output from said shake detector; a shutter controller which controls an operation of a shutter; and a sequence controller which terminates a correction operation of said shake correcting portion after said shutter controller closes the shutter, and thereafter terminates the operation of said shake detector, and thereafter drives said shake correcting portion to reset. ### Claim 22 A camera for preventing image shake comprising: a flash device operable for radiating flash light; an image shake correcting portion; a selector for setting a first mode in which said image shake correcting portion is operable and a second mode in which said image shake correcting portion is not operable; and an inhibiting portion which inhibits the operation of said image shake correcting portion when said selector sets the first mode and said flash device operates.