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. 27, 2003
Filed:
Dec. 04, 2000
Yutaka Koshikawa, Hachioji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An endoscope apparatus for reducing a halation for a large observation area without an illumination nonuniformity includes an insertion part which has an end having a wide-angle object optical system with two or more types of illumination optical systems having different illumination strength or light distribution. An illumination optical system having a greater illumination strength or wider light distribution is arranged on both sides of the end in a direction of a long side of a screen of the wide-angle object optical system. An illumination optical system having a lesser illumination strength or narrower light distribution is arranged on both sides of the end in a direction of a short side of the screen of the wide-angle object optical system.