| 摘要 |
There is provided a light source device which, when a light source which excites a phosphor with excitation light and emits fluorescent light is used, reduces incidence of the excitation light to an excitation light source to increase an output of the excitation light and extend the life. The light source device is provided with a plurality of excitation light sources emitting excitation light and a phosphor changing excitation light to fluorescent light, and the excitation light sources are arranged so that each excitation light emitted from each of the excitation light sources asymmetrically enters an excitation light irradiation region on a phosphor. A mirror is installed on an optical path of unconverted excitation light reflected from the phosphor and returns the unconverted excitation light to the phosphor side, whereby the unconverted excitation light can be utilized as excitation light again. |
