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:
Aug. 03, 1993
Filed:
Oct. 07, 1991
Iwao Kanamori, Kanagawa, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An optical system for an endoscope has, in order from its object side, an objective lens system having a first lens unit with a negative refractive power, a second lens unit with a positive refractive power and an aspherical surface therein, and relay lens systems arranged on the image side of the objective lens system. The optical system for an endoscope can correct aberrations, assure uniform brightness over the entire range of an image from its center to its peripheral areas, and permits reducing the diameter of the cover glass plate used therein.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile