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. 04, 1986
Filed:
Nov. 18, 1983
Takashi Maruyama, Nagano, JP;
Chinon Kabushiki Kaisha, Nagano, JP;
Abstract
A focusing control for a camera which uses a reflected beam of light to control extension of the lens. The reflected light beam is received by a photodetector having two aligned photodetectors which are movable with the camera lens. The circuitry controlling the lens movement processes the photo-detector signal by producing integrated sum and differences signals from the two detectors and using these signals to provide indications of the direction and amount of extension of the lens necessary to be in focus. The processor uses comparators, a counter for measuring extension and a memory for remembering the direction of misfocus.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile