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:
Nov. 07, 2017
Filed:
May. 28, 2015
Olympus Corporation, Tokyo, JP;
Nobuhiko Sone, Tokyo, JP;
Hideyasu Takato, Tokyo, JP;
OLYMPUS CORPORATION, Tokyo, JP;
Abstract
An endoscope includes an observation optical system that allows a magnified observation close to a subject, and illumination optical systems. In a close observation, Iis a maximum brightness within an observation view field angle, and Iis a center brightness. In a normal observation Iis a center brightness, and Iis a brightness at a position of 80% of a maximum view angle. The following is satisfied:0.3<<0.450.15<<0.250.3</φ<0.6where fis a focal length of each of the entire illumination optical systems, fis a focal length of the entire observation optical system in a maximum magnification, φis an outer diameter of a lens that is farthest on an object side of each illumination optical system, and Iis a maximum image height of the observation optical system.