Patent ID: 8070299

Claim:
A light source apparatus comprising: a light source unit that supplies light having a first wavelength; a wavelength conversion element that converts the light having the first wavelength into the light having a second wavelength different from the first wavelength; and a wavelength separator that separates the first-wavelength light from the second-wavelength light; an exit through which the light from the wavelength separator traveling in an exit direction passes; an infrared light reduction member provided at the position where the light from the wavelength separator traveling in the exit direction impinges on the infrared light reduction member, the infrared light reduction member reducing infrared light transmission; and a housing that houses the light source unit, the wavelength conversion element, and the wavelength separator, wherein the wavelength separator directs the second-wavelength light from the wavelength conversion element in the exit direction and the first-wavelength light from the wavelength conversion element in a first direction such that the first-wavelength light impinges on the housing, the first direction intersects the light source unit, the wavelength conversion element and the wavelength separator, the housing absorbs the first-wavelength light at a position where the light from the wavelength separator traveling in a direction other than the exit direction impinges on the housing, the exit direction, which is different than the first direction, intersects the exit, and the light source unit supplies infrared light, which is the first-wavelength light.