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:
Jul. 15, 2014
Filed:
Jun. 23, 2011
Takeshi Miyazaki, Fussa, JP;
Takeshi Miyazaki, Fussa, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
An illumination optical system includes: a light source device including: a red light-emitting device that emits red light; a blue light-emitting device that emits blue light; and a fluorescence plate comprising a green fluorescence region and a light transmission region, wherein the green fluorescence region is excited by the blue light to emit green light, and the light transmission region transmits the blue light; a light guide including a dichroic layer therein, wherein the dichroic layer is arranged to intersect a center axis of the light guide at about 45 degree to transmit the blue light while reflecting the green light and the blue light; a mirror group and a lens group. The blue light transmitted through the light transmission region is incident on an end surface of the light guide, and the red light and the green light are incident on a side surface of the light guide.