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. 03, 2012
Filed:
Jul. 27, 2009
Manabu Seo, Yokohama, JP;
Hiroshi Akiyama, Yokohama, JP;
Shigeru Oouchida, Tokyo, JP;
Yukiko Hamano, Kawasaki, JP;
Goichi Akanuma, Yokohama, JP;
Manabu Seo, Yokohama, JP;
Hiroshi Akiyama, Yokohama, JP;
Shigeru Oouchida, Tokyo, JP;
Yukiko Hamano, Kawasaki, JP;
Goichi Akanuma, Yokohama, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A lighting device, including a first light source emitting light of a first wavelength; a second light source close to the first source, emitting light of a second wavelength in almost a same direction as that of the first source; a third light source located emitting light of a third wavelength in a direction different from that of the first and second sources; a coupling optical system coupling light from the first and second sources; another coupling optical system coupling light from the third source; and a light path synthesizer synthesizing a light path of light from the first, second and third sources, wherein the light path synthesizer includes a first surface reflecting light from the first source and transmitting light from the second and third sources and a second surface unparallel with the first surface, reflecting light from the second source and transmitting light from the third source.