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:
Aug. 19, 2014
Filed:
Apr. 04, 2012
Applicant:
Rie Ishimatsu, Utsunomiya, JP;
Inventor:
Rie Ishimatsu, Utsunomiya, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
The polarization beam splitting element is configured to reflect or transmit an entering beam according to its polarization direction. The element includes, in order from a beam entrance side, a base member having a light transmissive property, a first one-dimensional grating structure formed of a dielectric material and having, in a first direction, a first grating period smaller than a wavelength of the entering beam, and a second one-dimensional grating structure formed of a metal and having, in a second direction orthogonal to the first direction, a second grating period smaller than the wavelength of the entering beam.