Patent ID: 9170475
Filing Date: 2015-10-27
Classification: G02B,G02F,G03B,H01S,H04N

Abstract:
1. A phosphor converter receiving excitation light emitted by a source of polarized excitation light, the phosphor converter comprising: a phosphor material located on the surface of a reflector and a light pipe integrator system, the phosphor material, when irradiated by the excitation light, emitting fluorescent light having a different spectrum than a spectrum of the excitation light; a light pipe integrator system comprising a light pipe integrator; the light pipe integrator having a first surface through which the excitation light enters the light pipe integrator and a second surface through which the excitation light exits the light pipe integrator; the light pipe integrator system positioned relative to the source and the phosphor material such that: the light pipe system positioned such that, when the phosphor material emits fluorescent light, the second surface of the light pipe integrator is positioned to receives a majority of the fluorescent light and the fluorescent light is transmitted to the first surface of the light pipe integrator; a reflective polarizer positioned in the light path between the polarized excitation light source and the phosphor material, wherein: the phosphor material configured to scatter fluorescent light reflected by the reflective polarizer such that the polarization exhibited by the scattered fluorescent light exhibits both the same polarization as the excitation light and the orthogonal polarization as the excitation light.