Patent ID: 8550681
Filing Date: 2013-10-08
Classification: G02B,H04N

Abstract:
1. A light source assembly comprising, in combination; a) a primary light pipe forming at least a fight port and elongate axial pathway from at least first and second light entrances to the light port, the second light entrance being axially spaced a along the primary light from the first light entrance; b) at least first and second light feeds for respectively feeding light of a first colour into said primary light pipe via said first light entrance and feeding light of a second colour into said primary light pipe via second light entrance; and c) at least a first dichroic filter positioned in the primary light pipe optically between the first and second light entrances and operative as oriented in the primary light pipe to pass said light of said first colour entering said primary light pipe via said first light entrance toward the light port, and to reflect said light of said second colour entering said primary light pipe via said second light entrance toward the light port, further comprising an angle-dependent, wavelength-selective pass filter in respect of at least one of said light entrances, said filter being operative to be transmissive of light of at least the colour associated with the respective light entrance within a first angle of incidence range, and reflective of the same light within a second angle of incidence range.