Light source apparatus and projection apparatus

摘要

A light source unit includes a red light source, a first blue-light source, a fluorescent material, a second blue-light source and an optical system. The red light source emits light in a red wavelength range. The first blue-light source emits light in a first blue-wavelength range. The fluorescent material receives the light in the first blue-wavelength range and emits light in a green wavelength range. The second blue-light source emits light in a second blue-wavelength range whose wavelengths are longer than those in the first blue-wavelength range. An optical system guides the light emitted from the red light source, the light emitted from the second blue-light source, and the light emitted from the fluorescent material, along a unique optical path.

主权项

1. A light source apparatus comprising:
a red light source which emits light in a red wavelength range; a first blue-light source which emits light in a first blue-wavelength range; a fluorescent material which receives the light in the first blue-wavelength range and emits light in a green wavelength range; a second blue-light source which emits light in a second blue-wavelength range having wavelengths longer than wavelengths in the first blue-wavelength range; an optical system which guides each of the light emitted from the red light source, the light emitted from the second blue-light source, and the light emitted from the fluorescent material, along a unique optical path, the optical system comprising a first optical-guide system which guides the light emitted from the red light source to a light emitting part, a second optical-guide system which guides at least the light emitted from the first blue-light source to the fluorescent material, a third optical-guide system which guides the light emitted from the fluorescent material to the light emitting part, and a fourth optical-guide system which guides the light emitted from the second blue-light source to the light emitting part; an optical path switcher provided at a point of intersection of an optical path of the light in the first blue-wavelength range and an optical path of the light in the second blue-wavelength range; and an optical-path switch controller which time-divisionally performs (i) a first operation of guiding the light in the first blue-wavelength range and the light in the second blue-wavelength range to the second optical-guide system, and (ii) a second operation of guiding the light in the first blue-wavelength range to the second optical-guide system and the light in the second blue-wavelength range to the fourth optical guide-system.