US 7,925,144 B2Granted

Image stabilizing apparatus and optical apparatus

AssigneeCanon Kabushiki Kaisha

InventorKoichi Washisu

Life of this patent

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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.

Claims3

Dependent claims

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 cut off frequency;
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 cut off frequency higher than the first cut off frequency;
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.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/558,371Filed 11 Sep 2009 · continuation
Priority: JP 2006-0299667 Feb 2006
Published: US 2010/0074605 A125 Mar 2010
Granted: 12 Apr 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G03B 5/00
Adjustment of optical system relative to image or object surface other than
G03B 2205/0015
Movement of one or more optical elements for control of motion blur: by displacing one or more optical elements normal to the optical axis
G03B 2217/005
Details of cameras or camera bodies; Accessories therefor: blur detection
G03B
Apparatus or arrangements for taking photographs or for projecting or viewing them

Family

Application11/671,711Parent of this continuation · filed 6 Feb 2007
US 2010/0074605 A1Pre-grant publication · published 25 Mar 2010
US 7,609,950 B2Parent of this continuation
US 2007/0183762 A1Published application
US 7,925,144 B2This patent

From the US filing history. Foreign family members aren’t listed.