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:
Mar. 30, 2000
Masanori Iida, Katano, JP;
Hiroyuki Asakura, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The apparatus has: a wavelength tunable filter ; a photoelectric conversion part which converts transmitted light received from the wavelength tunable filter into a received light intensity signal; a received light intensity detecting part which detects the intensity of the received light intensity signal; a signal component detecting part which detects a signal component from the received light intensity signal; a signal intensity detecting part which detects the intensity of the signal component; an intensity variation detecting part which detects an intensity variation in the received light intensity signal which is detected and an intensity variation in the signal component; and a peak position detecting part and a wavelength scanning part which scan and a wavelength to be selected by the wavelength tunable filter based on the two detected variations.