Patent ID: 7213944
Filing Date: 2007-05-08
Classification: F21V,G03B

Abstract:
1. A light source apparatus comprising: light generating means; a first concave mirror of collecting a part of light radiated from the light generating means; and a second concave mirror of collecting another part of the light radiated from the light generating means not collected by the first concave mirror and reflecting it on the first concave mirror, wherein a reflection plane of the first concave mirror and a reflection plane of the second concave mirror are in a form of non-rotation symmetry to a reference axis connecting a source of luminescence of the light generating means to a focus of the light collected by the first concave mirror respectively; a distance between the reflection plane of the second concave mirror and the source of luminescence is shorter than the distance between the source of luminescence and the focus of the light collected by the first concave mirror; a part of the reflection plane of the first concave mirror is formed around the reference axis; and the second concave mirror is placed substantially outside luminous fluxes formed by having the light of the light generating means reflected on the first concave mirror, wherein the reflection plane of the first concave mirror is located closer to the source of luminescence than the reflection plane of the second concave mirror; and the following relations are satisfied if, when a focusing angle of the first concave mirror is divided in two by a plane including the reference axis, a larger angle is α, a smaller angle is β, a maximum angle of the light radiated from the light generating means to the first concave mirror and the second concave mirror is γ, and the focusing angle of the second concave mirror is θ: