Patent ID: 9645481
Date: 2017-05-09
CPC Classifications: F21V,G02B,G03B,H04N

Claim:
1. A light source apparatus comprising: a solid-state light source: a dichroic mirror for reflecting blue excitation light emitted from the solid-state light source; a phase difference plate which the excitation light reflected on the dichroic mirror enters; a fluorescent plate including a fluorescent region irradiated with the excitation light to emit fluorescent light and a reflection region on which the excitation light is reflected, the excitation light being reflected on the dichroic mirror and transmitted through the phase difference plate; and a plurality of condenser lenses that are disposed between the phase difference plate and the fluorescent plate and condense the excitation light and the fluorescent light, wherein at least the condenser lens closest to the fluorescent plate among the plurality of condenser lenses is a lens made of a glass material having a linear expansion coefficient of 32.5×10