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. 24, 2009
Filed:
Mar. 21, 2005
Kenichi Nakamura, Zama, JP;
Kenichi Nakamura, Zama, JP;
Anritsu Corporation, Atusgi-shi, JP;
Abstract
A collimator lens converts light beams emitted from a low reflectance facet of a semiconductor laser into parallel light beams. A diffraction grating receives and diffracts the light beams at a predetermined incident position and a predetermined angle of a diffraction face. A turnable mirror has a mirror surface which is positioned opposite the diffractance facet of the diffraction grating, makes the diffracted light beams incident in a reverse optical path to the diffraction face, and returns the incident light beams to the laser. A stationary mirror makes the light beams from the collimator lens incident from a predetermined direction to a predetermined position of the diffraction grating at the side of the mirror surface of a virtual plane extending from the mirror surface of the mirror and at the side of the diffraction face of a virtual plane extending from the diffraction face of the diffraction grating.