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:
Oct. 02, 2012
Filed:
Oct. 21, 2008
Hirokazu Kubo, Hino, JP;
Makio Ueno, Nagano, JP;
Hirokazu Kubo, Hino, JP;
Makio Ueno, Nagano, JP;
Olympus Corporation, Tokyo, JP;
Abstract
The present invention is low cost, does not exert a negative influence on the surroundings, has a small group-velocity delay dispersion, efficiently blocks reflected return light such that the laser light does not return to the laser light source, and allows properly polarized laser light to enter a polarization-dependent element in a subsequent stage. An optical device is provided which includes a laser light source, an optical system that transmits laser light emitted from the laser light source, and a polarization-dependent element into which the laser light transmitted by the optical system enters. The characteristics of outgoing light are changed according to a polarization state of the incident light. The optical system includes a reflected-light generator that reflects a part of the transmitted laser light, and λ/4 wave plates are disposed such that the reflected-light generator is disposed therebetween.