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:
Mar. 31, 2009
Filed:
Mar. 11, 2005
Toshihiko Ushiro, Hyogo, JP;
Kazuhiko Oda, Hyogo, JP;
Soichiro Okubo, Hyogo, JP;
Takashi Matsuura, Hyogo, JP;
Toshihiko Ushiro, Hyogo, JP;
Kazuhiko Oda, Hyogo, JP;
Soichiro Okubo, Hyogo, JP;
Takashi Matsuura, Hyogo, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A hologram color filter diffraction-separates an incident lightwave using a hologram to project thus separated lightwaves having different-wavelengths at intended positions with a specified spatial period. The hologram color filter comprises a light-transmitting substrate () and a light-transmitting diamond-like-carbon (DLC) film () formed on the substrate. In the DLC film, a relatively-low-refractive-index belt-shaped region (n) and a relatively-high-refractive-index belt-shaped region (n) are placed alternately.