# US 7,609,950 B2 · Image stabilizing apparatus and optical apparatus

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- Number: US 7,609,950 B2
- Document ID: US7609950B2
- Status: Granted
- Kind: B2
- Application number: 11/671,711
- Filed: 2007-02-06
- Published: 2007-08-09
- Granted: 2009-10-27
- Earliest claimed: 2006-02-07
- Assignees: Canon Kabushiki Kaisha
- Inventors: Koichi Washisu
- Web page: https://patentgrep.com/patent/US7609950B2

## CPC

- 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 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

An image stabilizing apparatus is disclosed which is capable of sufficiently correcting shift shakes even with a small and lightweight accelerometer. The apparatus includes an angular velocity detector which detects angular velocity generated by a shake, an angular velocity computing unit which processes an angular velocity signal, the unit processing the angular velocity signal with a first frequency characteristic, an acceleration detector which detects acceleration generated by the shake, an acceleration computing unit which processes an acceleration signal, the unit processing the acceleration signal with a second frequency characteristic having a signal processing band narrower than the first frequency characteristic, an adder which adds an output signal from the angular velocity computing unit to an output signal from the acceleration computing unit, and an image stabilizing mechanism which performs an image stabilizing operation based on an output signal from the adder.

## Claims

### Claim 1

An image stabilizing apparatus comprising:
an angular velocity detector which detects angular velocity acting on the image stabilizing apparatus;
an angular velocity computing unit which processes an angular velocity signal obtained by the angular velocity detector, the angular velocity computing unit processing the angular velocity signal with a first frequency characteristic;
an acceleration detector which detects acceleration acting on the image stabilizing apparatus;
an acceleration computing unit which processes an acceleration signal obtained by the acceleration detector, the acceleration computing unit processing the acceleration signal with a second frequency characteristic having a signal processing band narrower than the first frequency characteristic;
an adder which adds an output signal from the angular velocity computing unit to an output signal from the acceleration computing unit; and
an image stabilizing mechanism which performs an image stabilizing operation based on an output signal from the adder,
wherein a gravity acceleration component of the output signal from the acceleration computing unit is corrected using the output signal from the angular velocity computing unit.

### Claim 2 (depends on 1)

The image stabilizing apparatus according to claim 1, wherein a cut off frequency processed by the acceleration computing unit is higher than a cut off frequency processed by the angular velocity computing unit.

### Claim 3 (depends on 1)

The image stabilizing apparatus according to claim 1, wherein the acceleration computing unit has a frequency compensation function for providing a phase lag to a low frequency input signal.

### Claim 4 (depends on 1)

An optical apparatus comprising the image stabilizing apparatus according to claim 1.