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:
May. 12, 1981
Filed:
May. 14, 1979
Mototugu Ogawa, Chofu, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An illuminating unit for endoscopes includes a light guide member and a cover glass disposed forwardly of the light exiting end face of the light guide member and located within an illumination window which is formed in the distal end of the endoscope. The cover glass has an entry and an exit surface through which light passes, at least one of said surfaces being formed with a surface configuration comprised of a plurality of coaxial concave lens portions having different radii of curvature, each concave coaxial lens portion having a radius of curvature which is less than that of the surrounding lens portion. The aforesaid surface configuration may be formed upon either the entry or exit surface of the cover glass or both of said surfaces. In the two former cases, the remaining one of the entry and exit surfaces may be provided with a concave lens surface having a uniform radius of curvature.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile