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:
Nov. 24, 2009
Filed:
Jan. 26, 2007
Hiromasa Sato, Koriyama, JP;
Hiromasa Sato, Koriyama, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
A polarized diffractive filter contains cyclic concave/convex portions formed as a diffractive grating on a transparent substrate. The concave portions are filled with an optical material. At least one member selected from the group consisting of i) a material constituting the concave/convex portions, and ii) the optical material filled in the concave portions contains a liquid crystal material. The diffractive grating contains an isotropic material, the isotropic material having a refractive index outside a range from an extraordinary index to an ordinary index of the liquid crystal material. The polarized diffractive filter is capable of receiving light having at least two different peak wavelengths so as to shield light of at least one of the peak wavelengths by diffraction and to transmit the light of the other peak wavelengths.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile