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. 02, 2002
Filed:
Jan. 21, 2000
Applicant:
Inventors:
Assignee:
Industrial Technology Research Institute, Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/34 ;
U.S. Cl.
CPC ...
G02B 6/34 ;
Abstract
The invention provides a structure of tunable optical filter grating. The structure includes a bimetallic strip and a compression spring to set up suitable strain for adjusting the position of the central wavelength. The bimetallic strip can also be specially designed to compensate for any drift in central wavelength due to temperature change so that temperature monitoring and feedback control designs is obsolete. Therefore, the operating wavelength of the optical grating is adjustable yet insensitive to temperature changes.