PROBLEM TO BE SOLVED: To provide a light source device which obtains white light by efficiency using fluorescence emitted from a fluorescent material in response to excitation light.SOLUTION: A light source device 3L has: a fourth light source 14 emitting excitation light having a predetermined wavelength a fluorescent material arrangement member 40 provided with a fluorescent material 43 emitting fluorescence having a predetermined wavelength by being excited by the excitation light and optical members 24 and 34 guiding the excitation light emitted from the fourth light source 14 to the fluorescent material 43 and guiding the fluorescence emitted from the fluorescent material 43 in a predetermined direction. The fluorescent material arrangement member 40 has, on one side thereof: a first slope 41 provided with the fluorescent material 43 and tilted at a prescribed angle with respect to the optical axis 45A of the excitation light guided to the fluorescent material 43 and a second slope 42 facing the first slope 41 with the optical axis 45A interposed in-between and provided with a reflection member 44 reflecting the fluorescence emitted from the fluorescent material 43.COPYRIGHT: (C)2014,JPO&INPIT【課題】励起光を受けて蛍光体から出射される蛍光を効率良く利用して白色光を得る光源装置を提供する。【解決手段】光源装置3Lは、予め定めた波長の励起光を出射する第4光源14と、励起光によって励起されて予め定めた波長の蛍光を出射する蛍光体43が設けられる蛍光体配設部材40と、第4光源14から出射された励起光を蛍光体43に導き、蛍光体43から出射された蛍光を予め定め方向に導く光学部材24、34と、を備え、蛍光体配設部材40は、一面側に、蛍光体43が設けられる、蛍光体43に導かれる励起光の光軸45Aに対して予め定めた角度傾いた第1傾斜面41と、光軸45Aを挟んで第1傾斜面41に対峙し、蛍光体43から出射された蛍光を反射させる反射部材44が設けられる第2傾斜面42と、を備えている。【選択図】図4
