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:
Dec. 25, 2012
Filed:
Apr. 25, 2012
Daisuke Sano, Utsunomiya, JP;
Yutaka Yamaguchi, Utsunomiya, JP;
Daisuke Sano, Utsunomiya, JP;
Yutaka Yamaguchi, Utsunomiya, JP;
Canon Kabuskiki Kaisha, Tokyo, JP;
Abstract
An optical element including a first layer () made of a medium having optical anisotropy, wherein a difference between refractive indexes nand n(n>n) at a central wavelength λ for first and second polarized lights which enter the optical element and whose polarization directions are different from each other is at least 0.1, and wherein conditions (n−n)·(n−n)≦0 and n<nare satisfied, where nand ndenote refractive indexes of a second layer () and a third layer () optically adjacent to the first layer in both sides of the first layer and made of isotropic media at the central wavelength.