Light source device and projection-type image display device

摘要

To provide a light source device and a projection-type image display device which can improve light emitting efficiency and service life of a fluorescent material. The light source device includes: an excitation light source for emitting excitation light; a fluorescent material for emitting fluorescent light when excited by the excitation light; and an optical member for directing the excitation light to the fluorescent material. The optical member has a curvature that is set such that a light-condensing position of the excitation light is positioned on a light-emitting side of the excitation light relative to the fluorescent material. An optical fiber is disposed between the excitation light source and the light source, so that the excitation light from the excitation light source may be made incident on the optical fiber.

主权项

1. A light source device comprising:
an excitation light source for emitting excitation light; a fluorescent material for emitting fluorescent light when excited by the excitation light; and an optical member for directing the excitation light to the fluorescent material, wherein the optical member has a curvature that is set so as to allow the excitation light that has passed through the optical member to be made incident on the fluorescent material at a front side of the fluorescent material as a light-condensing position, and wherein supposing that an area of the luminance distribution of the excitation light irradiated onto the fluorescent material is B and that an area of the image display element is A, the following formula is satisfied: 0.0136×A≦B≦0.0513×A.