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:
Feb. 11, 2014
Filed:
May. 13, 2009
Keiji Murata, Shibuya-Ku, JP;
Hiroshi Tsuyuki, Shibuya-Ku, JP;
Daisuke Akiyama, Shibuya-Ku, JP;
Olympus Medical Systems Corp., Tokyo, JP;
Abstract
The invention provides lenses at low cost, which form an illumination optical system for endoscopes that has high efficiency and achieves improved light distribution. The illumination optical system for endoscopes is used in opposition to a light beam exit endof a transmission means F for light emitted from a light source, and comprises, as viewed from the light beam exit end, a lens grouphaving positive power and an optical membersubsequent thereto which has a spherical surfacethat functions as a lens, has a radius of curvature R, and satisfies the following condition:1.48≦≦4  (1)where