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:
Oct. 18, 2011
Filed:
Jul. 02, 2009
Yukihiro Tao, Fukushima, JP;
Hiromasa Sato, Fukushima, JP;
Atsushi Koyanagi, Fukushima, JP;
Koji Miyasaka, Fukushima, JP;
Yukihiro Tao, Fukushima, JP;
Hiromasa Sato, Fukushima, JP;
Atsushi Koyanagi, Fukushima, JP;
Koji Miyasaka, Fukushima, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
An optical rotating plate has an optical rotating material layer. A phase plate is provided on a first surface side of the optical rotating plate and has at least one birefringent material layer. The first surface side is disposed toward an emitting side of an optical path, thereby giving different phase differences to a first linearly polarized light group containing at least a linearly polarized light having a first wavelength and a second linearly polarized light group containing at least a linearly polarized light having a second wavelength which is different from the first wavelength.