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:
Sep. 28, 1993
Filed:
Jan. 12, 1993
Haruhiko Murata, Moriguchi, JP;
Hirotsugu Murashima, Yamatotakada, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
The present invention relates to an automatic focusing camera in which an automatic focusing operation is performed by detecting a high frequency component of a video signal obtained from an image sensor device at every predetermined period, and has a theme that the automatic focusing operation can be performed within an extremely short time. To this end, by a search means, a focus lens is moved from a first position to a second position with relatively coarse steps to obtain a focus evaluating value for each step. In a first method, after the focus lens is moved to the vicinity of a lens position corresponding to a maximum focus evaluating value obtained by the search means, the focus lens is moved with small incremental steps to find a true maximum focus evaluating value. In a second method, a true maximum focus evaluating value is found from interpolated focus evaluating values obtained by interpolation of focus evaluating values exist in the vicinity of the maximum focus evaluating value obtained by the search means and adjacent to each other.