Patent ID: 8814366
Filing Date: 2014-08-26
Classification: G02B,G03B

Abstract:
1. A light source apparatus comprising: a plurality of light sources which emit light of different wavelength bands and different luminous intensity distributions; groups of collective lenses which collect the light from the plurality of light sources; a light guiding optical system which collects the light collected by the collective lenses from the plurality of light sources to a same optical axis to illuminate the light onto a predetermined plane; a light tunnel which is disposed on an axis of the light that is illuminated onto the predetermined plane and is adapted to uniformly distribute the illuminance of the light; a diffuse plate wheel which is disposed near an entrance port of the light tunnel and which comprises a plurality of segments with different coefficients of diffusion which are arranged in a circumferential direction; a motor for rotating the diffuse plate wheel; and a light source control device which controls the rotation of the diffuse plate wheel in synchronism with emission of light by of the plurality of light sources; wherein a length of the light tunnel is shorter than a length necessary to uniformly distribute the illuminance of a beam of light having a narrow luminous intensity distribution among the light of different luminous intensity distributions emitted by the plurality of light sources.