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:
Mar. 05, 2013
Filed:
Sep. 20, 2011
Daisuke Akiyama, Fuchu, JP;
Takeshi Suga, Hino, JP;
Satoshi Takekoshi, Hachioji, JP;
Kazuhiro Gono, Sagamihara, JP;
Daisuke Akiyama, Fuchu, JP;
Takeshi Suga, Hino, JP;
Satoshi Takekoshi, Hachioji, JP;
Kazuhiro Gono, Sagamihara, JP;
Olympus Medical Systems Corp., Tokyo, JP;
Abstract
An endoscope includes: a first illumination optical system which emits illuminating light in a first linear polarization direction to an object from a distal end face of an insertion portion; and a first objective optical system which allows return light from the object to enter through an objective window provided in the distal end face; wherein the first illumination optical system and the first objective optical system are placed in a positional relationship such that on the distal end face, a line segment connecting an optical axis of the first illumination optical system and an optical axis of the first objective optical system is parallel or perpendicular to a polarization direction which results when the illuminating light emitted from the first illumination optical system is projected to the distal end face, and no polarizing element is provided between the object and the objective window.