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US 5,479,236 AGranted
Image stabilizing apparatus
AssigneeCanon Kabushiki Kaisha
InventorHideki Tanaka
Life of this patent
Estimating the term…
Abstract
This specification discloses an image stabilizing apparatus of high accuracy which includes a photo-taking lens having a first lens unit movable along the optic axis thereof to vary the focal length thereof, a second lens unit movable along the optic axis thereof to effect focus adjustment, and an optical unit for compensating for the vibration of an image, first and second detectors for detecting the lens positions of the first and second lens units, a third detector for detecting the vibration of the photo-taking lens, and a calculator for calculating the amount of compensation of the optical unit on the basis of the detection signals of the first, second and third detectors and in which the optical unit is operated to thereby ensure a good follow-up property relative to image vibration.
Claims18
A photo-taking system comprising:
- photo-taking lens means for forming an image comprising a first lens unit movable along an optic axis thereof to vary a focal length thereof, a second lens unit movable along the optic axis thereof to effect focus adjustment, and an optical unit for compensating for a vibration of the image;
- first and second detection means for detecting lens positions of said first and second lens units, respectively;
- third detection means for detecting a vibration of said photo-taking lens means;
- calculating means for calculating an amount of compensation of said optical unit on the basis of detection signals of said first, second, and third detection means;
- and
- position detection means for detecting a position of said optical unit,
- wherein said calculating means further calculates the amount of compensation of said optical unit on the basis of detection signals from said position detection means.
4 more elements
A photo-taking system comprising:
- photo-taking lens means for forming an image comprising a compensating optical unit for compensating for image blur, a zoom lens unit for effecting a zooming operation, and a focusing lens unit for effecting a focusing operation;
- vibration detection means for detecting vibration;
- information detection means for detecting focal length information, which varies with a zooming operation of said zooming lens unit, and focus distance information, which varies with a focusing operation of said focusing lens unit;
- calculating means for calculating an amount of compensation of said compensating optical unit in conformity with detection signals of said vibration detection means and said information detection means;
- and
- position detection means for detecting a position of said optical unit,
- wherein said calculating means further calculates the amount of compensation of said optical unit on the basis of detection signals from said position detection means.
4 more elements
An image stabilizer device, comprising:
- (a) objective lens means for forming an image, said lens means having an optical axis and comprising a first optical unit movable along the optical axis for focusing and a second optical unit movable along the optical axis for zooming;
- (b) variable vertical angle prism means;
- (c) first means for outputting a first signal representing a position of said first optical unit;
- (d) second means for outputting a second signal representing a position of said second optical unit;
- (e) third means for outputting a third signal representing a deviation in a position of the image formed by said objective lens means;
- and
- (f) calculating means for calculating a driving amount for driving said variable vertical angle prism means based on the first, second, and third signals.
4 more elements
An image stabilizer device, comprising:
- (a) objective lens means for forming an image, said lens means having an optical axis and comprising a first optical unit movable along the optical axis, a second optical unit movable along the optical axis, and a third optical unit for stabilizing blur of the image;
- (b) first detection means for detecting a position of said second optical unit;
- (c) second detection means for detecting a position of said first optical unit;
- (d) third detection means for detecting blur;
- (e) driving means for driving said third optical unit in accordance with detection results of said first, second, and third detection means;
- and
- (f) position detection means for detecting a position of said third optical unit,
- wherein said driving means further drives said third optical unit on the basis of detection signals from said position detection means.
5 more elements
An image stabilizing device, comprising:
- (a) objective lens means for forming an image, said objective lens means having an optical axis and comprising a first optical unit movable along the optical axis, a second optical unit movable along the optical axis, and a third optical unit for stabilizing blur of the image;
- (b) first detection means for detecting the position of said second optical unit;
- (c) second detection means for detecting the position of said first optical unit;
- (d) third detection means for detecting blur of the image;
- (e) fourth detection means for detecting the condition of said third optical unit;
- and
- (f) driving means for driving said third optical unit in accordance with detection results of said first, second, third, and fourth detection means.
4 more elements
An image stabilizer apparatus comprising:
- photo-taking means for forming an image, comprising a first lens unit movable along an optical axis thereof to vary a focal length thereof, a second lens unit movable along the optical axis thereof to effect a focus adjustment, and an optical unit for compensating for a vibration of the image;
- first detection means for detecting information regarding focus distance information of said photo-taking means;
- second detection means for detecting blur of the image;
- third detection means for detecting an amount of compensation of said optical unit;
- and
- driving means for driving said optical unit in accordance with detection results of said first, second, and third detection means.
3 more elements
Dependencies are inferred from the claim text.