Patent ID: 9328898
Filing Date: 2016-05-03
CPC Classification: F21V,F21W,F21Y,G02B

Claim Text:
1. A hybrid optical system comprising: a planar array of light emitting diode (LED) chips arranged in a circular area having a first diameter and a first etendue; a compound parabolic concentrator (CPC) nonimaging optical element having axial symmetry, circular cross sections, a circular CPC input port adjacent to said LED array having a second diameter and a second etendue, and a circular CPC output port having a third diameter and a third etendue; a cylindrical optical element having axial symmetry, a constant circular cross section, a fourth diameter, a fourth etendue and a first length; a gobo slot adjacent to said CPC output port; an object plane adjacent to said gobo slot; an imaging projection lens system, having a lens input port adjacent to said image plane, a fifth etendue, and a fifth diameter substantially equal to said fourth diameter, and a lens output port having a sixth diameter and sixth etendue; Wherein, said LED array, said CPC nonimaging optical element, said gobo slot, said image plane and said projection lens system have a common optical axis; said second diameter is substantially equal to said first diameter; said third diameter is greater than 1.5 but less than 3.0 times said second diameter; said first length is greater than 1.5 but less than 3.0 times said third diameter; said fourth diameter is equal to said third diameter; said fifth diameter is equal to said fourth diameter; and said first, second, third, fourth, fifth and sixth etendues are all equal.