Photography – Camera shake sensing – With accelerometer
Patent
1999-08-06
2000-10-03
Perkey, W. B.
Photography
Camera shake sensing
With accelerometer
G03B 1700
Patent
active
061284424
ABSTRACT:
A trembling compensation and control apparatus detects an angular displacement of an optical axis of a focusing optical system and drives and controls an compensation optical system so as to compensate for trembling of a camera. The angular displacement of the optical axis of the focusing optical system is detected by an angular velocity sensor. A low-cut filter is provided that processes and calculates an angular displacement velocity signal output from the angular velocity sensor. The low-cut filter cuts a low frequency component from the angular displacement velocity signal and outputs a valid angular displacement velocity signal. The valid angular displacement velocity signal is converted by an integration portion into an angular displacement signal. A level detector is further disposed for detecting the valid angular displacement velocity signal. The low-cut filter and the integration portion are modified in calculation processing when said level exceeds a predetermined level, and are reset in calculation processing when the level becomes within the predetermined level again.
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Asahi Kogaku Kogyo Kabushiki Kaisha
Perkey W. B.
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