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:
Jul. 22, 2003
Filed:
Nov. 27, 2000
Keisuke Asami, Kanagawa, JP;
Ando Electric Co., Ltd., Kanagawa, JP;
Abstract
An external resonator type wavelength variable light source comprises a semiconductor laser formed on one end face with a antireflection coating , a lens for converting emitted light from the end face of the semiconductor laser formed with the antireflection coating into collimated light, a diffraction grating for selecting a wavelength of the collimated light provided through the lens and diffracting the light, and a mirror for reflecting the light diffracted through the diffraction grating and feeding back the light again diffracted through the diffraction grating into the semiconductor laser through the lens . A V-groove grating mirror having reflecting faces with an arrangement like a grating, of a plurality of V grooves each shaped like V at right angles in cross section in a base material with a reflection coating formed on the surface of each V groove is used as the mirror.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile