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:
Jun. 26, 2018
Filed:
Oct. 29, 2008
Applicants:
Osamu Tanitsu, Kumagaya, JP;
Koji Shigematsu, Kawasaki, JP;
Hiroyuki Hirota, Fukaya, JP;
Tomoyuki Matsuyama, Kita-katsushika-gun, JP;
Inventors:
Osamu Tanitsu, Kumagaya, JP;
Koji Shigematsu, Kawasaki, JP;
Hiroyuki Hirota, Fukaya, JP;
Tomoyuki Matsuyama, Kita-katsushika-gun, JP;
Assignee:
NIKON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03F 7/20 (2006.01); G02B 27/28 (2006.01); F21V 9/14 (2006.01); F21V 13/02 (2006.01);
U.S. Cl.
CPC ...
G03F 7/70566 (2013.01); F21V 9/14 (2013.01); F21V 13/02 (2013.01); G02B 27/286 (2013.01); G03F 7/701 (2013.01); G03F 7/70191 (2013.01); G03F 7/70308 (2013.01);
Abstract
There is disclosed a polarization-modulating element for modulating a polarization state of incident light into a predetermined polarization state, the polarization-modulating element being made of an optical material with optical activity and having a circumferentially varying thickness profile.