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:
Sep. 05, 2006
Filed:
Nov. 18, 2003
Demetri Psaltis, Pasadena, CA (US);
George Panotopoulos, Palo Alto, CA (US);
Hung-te Hsieh, Pasadena, CA (US);
Demetri Psaltis, Pasadena, CA (US);
George Panotopoulos, Palo Alto, CA (US);
Hung-Te Hsieh, Pasadena, CA (US);
California Institute of Technology, Pasadena, CA (US);
Abstract
A temperature compensated apparatus for filtering light is comprised of a holographically recorded grating defined in a photosensitive layer for providing optical filtration for light incident on the grating with a predetermined angle of incidence, and an angulation means responsive to temperature for tilting the grating relative to the angle of incidence of the light as a function of temperature of the grating so that changes in the filtration by the grating compensate for changes in temperature of the grating to maintain effective filtration of the light approximately constant.