Bandpass reflector with heat removal

A reflector assembly for a projector, comprising:

• a heat conductive assembly defining an electromagnetic (EM) chamber;
• an absorptive layer disposed on the EM chamber;
• a decoupling layer including germanium disposed on the absorptive layer;
• and
• a filter disposed on the decoupling layer allowing a first band of frequencies to reflect while allowing other frequencies to pass to the absorptive layer.

A reflector for a projector, comprising:

• a metal assembly defining a shaped surface for concentrating light;
• an ultraviolet (UV) and infra-red (IR) filter layer disposed on the shaped surface;
• a decoupling layer including germanium disposed on the UV and IR filter layer;
• and
• a reflective surface disposed on the decoupling layer for reflecting light while not reflecting UV and IR.

An optical assembly, comprising:

• a light source adapted to create electromagnetic energy;
• a fixture for holding the light source and defining an optical surface and thermally coupled to a heat sink;
• a layer of germanium disposed on the optical cavity and thermally coupled to the heat sink;
• a band-pass filter deposited over the germanium to reflect a range of light frequencies and to transmit electromagnetic energy outside the range of light frequencies to the layer of germanium.

A method of making an optical reflector with an integral heat-sink, comprising the steps of:

• defining a region on the heat-sink to form an optical surface;
• covering the surface with material absorptive to at first range of light;
• covering the material with a layer of germanium;
• and
• covering the surface over the germanium with a band-pass layer reflective to at least one different range of light.

A method of creating a filtered light source for an optical projector, comprising:

• creating a wide-band light source spanning from the infra-red (IR) to the ultraviolet (UV);
• filtering the IR and UV light from the wide-band light source with dielectric coatings to create a white light output and a thermal radiant output;
• and
• transferring the thermal radiant output via a layer of germanium to a heat-sink forming an optical device that the dielectric coatings are disposed on, the optical device projecting the white light output.

A reflector, comprising:

• a metal reflector;
• an absorptive coating on the metal reflector;
• a decoupling germanium layer on the absorptive coating;
• and
• a selective optical reflector disposed on the decoupling germanium layer that allows at least one of UV and IR to pass through to the absorptive coating.