Patent ID: 8820940
Filing Date: 2014-09-02
Classification: F21V,F21Y,G02B,G03B

Abstract:
1. An illumination device, comprising: an excitation light source that emits excitation light having a first wavelength; a rotating fluorescent member that includes a fluorescent substance that is formed continuously along a circumference thereof and which, when irradiated with the excitation light, emits light having a second wavelength longer than the first wavelength, transmits a part of the excitation light and reflects another part of the excitation light, and a first reflective film provided at a side of the fluorescent substance, which is opposite to an excitation light incidence side, the fluorescent member emitting light including an excitation light component reflected from the fluorescent substance and the first reflective film and a light component emitted from the fluorescent substance; and a second reflective film that reflects the excitation light and guides the reflected excitation light to the fluorescent member.