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:
Nov. 11, 1980
Filed:
Mar. 05, 1979
Applicant:
Inventor:
Koji Saito, Sayama, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
250204 ; 354 25 ;
Abstract
A system and method for automatically focusing a camera is disclosed wher the outputs of a conventional spatial image correlator are sensed to develop a distance signal corresponding to object distance. The position of the camera lens is sensed to develop a focus signal indicative of lens position. The ratio of the distance signal to the focus signal is determined and compared to a predetermined value. When that ratio varies from the predetermined value, the lens is automatically re-positioned until correspondence occurs between the predetermined value and the ratio of the focus signal to the distance signal.