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:
Jan. 19, 1999
Filed:
Oct. 03, 1997
Applicant:
Inventor:
Akira Ogasawara, Tokyo, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
396 95 ;
Abstract
An automatic focus adjustment apparatus more ideally accomplishes a tracking servo process, which drives a shooting lens so that a focusing state is maintained by predicting movements of an image plane of a moving object. A lens driving system 6 determines the moving speed of an image plane of an object or a movement prediction curve by regression-calculating from a plurality of defocus amounts previously calculated, a calculator, the accumulation time of a focusing state detector, and a lens position obtained from a lens movement amount detector, to drive a lens by assuming a future position of the image plane based on a result of the calculation.