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. 10, 2012
Filed:
Apr. 05, 2007
Takamasa Ando, Osaka, JP;
Tsuguhiro Korenaga, Osaka, JP;
Masa-aki Suzuki, Osaka, JP;
Yuka Okada, Hyogo, JP;
Takamasa Ando, Osaka, JP;
Tsuguhiro Korenaga, Osaka, JP;
Masa-aki Suzuki, Osaka, JP;
Yuka Okada, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A diffractive optical element () includes a substrate (), a protective film (), and a diffraction grating () disposed between the substrate () and the protective film (), wherein the diffraction grating () is formed of a composite material containing a resin and inorganic particles, a volume ratio of the inorganic particles with respect to the composite material is equal to or smaller than 50% by volume, and the diffraction grating () has a thickness of equal to or smaller than 20 μm. Since the diffractive optical element () uses the composite material containing the resin and the inorganic particles as a material for the diffraction grating (), which is relatively difficult to process, the moldability improves compared with the conventional case of using glass, etc.