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. 06, 1977
Filed:
Jun. 11, 1976
Applicant:
Inventor:
Toshimichi Koizumi, Sagamihara, JA;
Assignee:
Olympus Optical Co., Ltd., , JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350216 ; 3501 / ;
Abstract
An objective for video disks comprising five lens components of single lenses for which the numerical aperture on the recording surface side is large, working distance is large and aberrations especially spherical aberration and coma are corrected favourably. Besides, said objective for video disks is arranged so that it can be used also for rays from infinite distance by varying an airspace between a second and third lens components.
Koizumi, Toshimichi. (1977). Objective for video disks (U.S. Patent No. 4046460). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4046460
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile