Patent ID: 8186864

Claim:
A light source device comprising: an excitation light source which generates excitation light; a fluorescent member containing a fluorescent substance which absorbs the excitation light to generate fluorescence; an emitting side optical member which is provided on an emitting end face of the fluorescent member and which has an optical property of reflecting the excitation light and transmitting the fluorescence; a reflector which is provided on the side surface of the fluorescent member and which has an optical property of reflecting the excitation light and the fluorescence; an incident side optical member provided on an incident end face of the fluorescent member, the incident side optical member including a transmission portion which has an optical property of transmitting the excitation light, and a reflection portion which has an optical property of reflecting the excitation light and the fluorescence; and an optical fiber which guides the excitation light generated from the excitation light source to the incident side optical member, the incident side optical member including a through-hole, the through-hole forming the transmission portion, the optical fiber being inserted in the through-hole of the incident side optical member.