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. 21, 2006
Filed:
May. 13, 2003
Tattee Khayim, Kawasaki, JP;
Masaki Tohyama, Yokohama, JP;
Tomoaki Yamaguchi, Kitakyushu, JP;
Hirokazu Nishimura, Yokohama, JP;
Tattee Khayim, Kawasaki, JP;
Masaki Tohyama, Yokohama, JP;
Tomoaki Yamaguchi, Kitakyushu, JP;
Hirokazu Nishimura, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A laser transmitter device includes a laser light source, first and second optical elements, and first and second detection elements. The first optical element has a first optical characteristic with wavelength dependency, whose light transmissivity or reflectivity shows a monotone increase or decrease within a wavelength range over channels. The second optical element has a second optical characteristic with wavelength dependency, whose transmissivity or reflectivity changes in a cycle corresponding to intervals of the channels or two times the intervals. The first detection element detects an intensity of light emitted from the laser light source and coming via the first optical element, and generates a first electric signal reflecting the first optical characteristic. The second detection element detects an intensity of light emitted from the laser light source and coming via the second optical element, and generates a second electric signal reflecting the second optical characteristic.