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:
Jun. 27, 1989
Filed:
Jun. 28, 1988
Applicant:
Inventor:
Lawrence E Walther, Macedon, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354402 ; 250201 ;
Abstract
Apparatus for generating automatic focus signals for positioning a lens includes a circuit for calculating a difference value between a selected pixel intensity level and the average value of the pixel intensities which neighbor the selected pixel. The difference value is fed to a thresholding circuit which generates a signal for clocking a downstream counter whenever the difference value exceeds a selected threshold value. The lens is repositioned until the output from the counter is a maximum thereby indicating an infocus position of the lens.