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. 23, 1980
Filed:
Dec. 21, 1978
Yoshisada Hayamizu, Hachiouji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A focusing optical system for single-lens reflex cameras comprising a semi-transparent mirror, lens and reflecting mirror, which are arranged near an exit surface of a penta-prism, and a detector arranged near an external surface of the penta-prism, the focusing optical system for single-lens reflex cameras being arranged to reflect a part of light from the penta-prism by the semi-transparent mirror, to further reflect that light by the reflecting mirror after it passes through the lens and to detect that light by the detector after it passes through the lens again.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile