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:
Mar. 24, 2015
Filed:
Mar. 18, 2011
Masateru Matsubara, Tokyo, JP;
Masateru Matsubara, Tokyo, JP;
NEC Display Solutions, Ltd., Tokyo, JP;
Abstract
An illumination optical system includes: a light source emitting light of a first wavelength; a fluorophore unit; an optical element and a quarter-wave plate between the optical element and the fluorophore unit. The fluorophore unit has a reflection region and a fluorophore region that gives off fluorescent light of a different wavelength than the first wavelength when irradiated by light of the first wavelength. The fluorophore unit is able to move such that the light from the light source sequentially irradiates the fluorophore region and the reflection region. The optical element separates the light of the first wavelength into a first linearly polarized light component and a second linearly polarized light component that is orthogonal to the first linearly polarized light component. The optical element guides the first linearly polarized light component of the light emitted from the light source to the fluorophore unit, and emits the light of the first wavelength that was reflected by the reflection region and fluorescent light that was emitted by the fluorophore region in the same direction.