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:
Apr. 19, 2016
Filed:
Aug. 29, 2012
Takako Suga, Yokohama, JP;
Takeshi Uchida, Tokyo, JP;
Takako Suga, Yokohama, JP;
Takeshi Uchida, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A signs-of-deterioration detector for a semiconductor laser includes a first light receiving section that acquires first information relating to an optical output of the semiconductor laser and a second light receiving section that acquires second information relating to an intensity distribution of the emission pattern below the lasing threshold of the semiconductor laser. The detector also includes a holding section that holds the first information and the second information at a predetermined time point T. The detector further includes a deciding section that decides the presence or absence of signs of rapid decrease of the optical output of the semiconductor laser by comparing the first information and the second information at at least one time point Tn (T<Tn), with those at the time point T