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. 27, 2017
Filed:
Sep. 16, 2014
Applicant:
Yasuyuki Shibayama, Ebina, JP;
Inventor:
Yasuyuki Shibayama, Ebina, JP;
Assignee:
RICOH COMPANY, LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/28 (2006.01); H04N 5/74 (2006.01); G03B 21/20 (2006.01); G03B 21/14 (2006.01); H04N 9/31 (2006.01);
U.S. Cl.
CPC ...
G03B 21/2066 (2013.01); G03B 21/147 (2013.01); H04N 5/7458 (2013.01); H04N 9/3152 (2013.01);
Abstract
An illumination unit includes a light source, an optical mixer to form secondary light sources from a light beam from the light source, and an illumination system to illuminate an optical modulator with the light beam from the optical mixer, including an optical element having an anamorphic surface, in which the optical element is rotated at a certain rotational angle about a rotational axis which is a normal line from a vertex of a surface of the optical element.