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:
Nov. 27, 2018
Filed:
Feb. 09, 2018
Applicant:
Takahiro Kado, Kanagawa, JP;
Inventor:
Takahiro Kado, Kanagawa, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/20 (2006.01); G03B 21/16 (2006.01); G02B 27/28 (2006.01); G03B 33/08 (2006.01); G02B 26/00 (2006.01);
U.S. Cl.
CPC ...
G03B 21/2093 (2013.01); G03B 21/204 (2013.01); G03B 21/2073 (2013.01); G02B 26/008 (2013.01); G02B 27/283 (2013.01); G03B 21/16 (2013.01); G03B 33/08 (2013.01);
Abstract
An image projection apparatus includes an illumination device, an optical-path forming section, an image forming element, a projection optical section, and an optical component. The illumination device includes a fluorescence generator; a wavelength selector having a first area and a second area; and a polarization converter; and an optical-path switcher. The wavelength selector alternately sets the first area and the second area in an optical path of the first light in a temporal manner. The illumination device switches a first optical path and a second optical path based on a setting of the wavelength selector.