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. 13, 1988
Filed:
Mar. 25, 1987
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An auxiliary light source for a passive focus detector, such as would be used for automatic focusing. A projection lens is inclined with respect to the imaging lens and projects a patterned image from a surface inclined with respect to the projection lens. Preferably the patterned image is projected to lie along the axis of the imaging lens so that a sharp illumination pattern is formed at all distances along that axis. Preferably the pattern is such that a higher intensity portion is imaged at a far distance and a lower intensity portion is imaged at a near distance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile