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:
Apr. 04, 2017
Filed:
Feb. 07, 2013
Applicants:
Saitama Medical University, Saitama, JP;
Utsunomiya University, Utsunomiya-shi, Tochigi, JP;
Inventors:
Assignees:
Saitama Medical University, , JP;
Utsunomiya University, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/30 (2006.01); G02B 27/28 (2006.01); G02B 27/09 (2006.01); G02B 5/00 (2006.01);
U.S. Cl.
CPC ...
G02B 27/286 (2013.01); G02B 5/001 (2013.01); G02B 5/3025 (2013.01); G02B 27/0977 (2013.01); G02B 27/0983 (2013.01); G02B 27/0927 (2013.01);
Abstract
An axially symmetric polarization conversion element that converts incident light into an axially symmetric polarized beam includes a reflection section having a shape obtained by rotating the cross section of a Fresnel rhomb wave plate along the direction of an optical axis around an axis that is parallel to the optical axis. The axially symmetric polarization conversion element converts the incident light into an axially symmetric polarized beam by utilizing two Fresnel reflections by the reflection section.