The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1999
Filed:
Sep. 12, 1997
Nobuhiko Terui, Ichikawa, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A camera shake amplitude detecting device comprises a mechanical detector for detecting a shake acceleration when a camera body is shaken, and a mechanical shake calculation device for calculating a shake amplitude of the camera body based on the detection output of the mechanical detector. The mechanical shake calculation device discriminates a time point of change between a positive acceleration and a negative acceleration based on the detection output of the mechanical detector, calculates and integration constant, and calculates a velocity by integrating by time the acceleration detected by the mechanical detector. In order to reduce the time required to calculate exact angular velocity, the constitution comprises an angular velocity sensor for detecting a shake of a camera, a high-pass filter for filtering off certain low frequency components of the output from the angular velocity sensor, a switch means for initializing the high-pass filter when the power source is turned on and a control means for detecting the time when the output of the angular velocity sensor becomes equal to 0 and switching the switch means to bring the high-pass filter in the active state.