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:
Jul. 01, 2014
Filed:
Apr. 04, 2012
Shuho Kobayashi, Matsumoto, JP;
Shuho Kobayashi, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
In a polarization conversion element including a plurality of light transmitting substrates and an optical element that includes polarization splitting films and reflective films that are alternately disposed between the light transmitting substrates, and a laminated wave plate that is arranged on the light outgoing face of the optical element and rotates the polarization plane of light emitted from the optical element by θ, a laminated wave plate is acquired by stacking a first wave plate of a phase difference Γfor light of a wavelength λ and a second wave plate of a phase difference of Γsuch that the optical axes thereof intersect each other, the relationship is '|Γ|=180 (degrees), and the azimuth of the optical axis of the first wave plate and the azimuth of the optical axis of the second wave plate are perpendicular to each other.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile