Reflector and optical coating for improved LED lighting system
View Patent ↗Provided is a method including determining a first incident angle at which light from a light source will impinge on a first thin-film reflective stack of a planned first reflector for a lighting system. The method also includes determining a second incident angle at which light from the light source will impinge on a second thin-film reflective stack of a planned second reflector for the lighting system. The method further includes designing, using a processor executing a software package, the first reflector, comprising tuning a reflective characteristic of the first thin-film reflective stack as a function of the first incident angle determined, and designing, using the processor executing the software package, the second reflector, comprising tuning a reflective characteristic of the second thin-film reflective stack as a function of the second incident angle determined.
1. A multi-reflector lighting apparatus, comprising:
a first reflector having a first thin-film reflective stack, wherein the first reflector, when positioned for operation within the apparatus, will reflect light arriving at a first incident angle from a light source; and
a second reflector having a second thin-film reflective stack, wherein the second reflector, when positioned for operation within the apparatus, will reflect light arriving at a second incident angle from the light source;
wherein the first and second thin-film reflective thin-film reflective stacks include corresponding reflective characteristics tunable as a function of at least one of a plurality of factors associated with the lighting system; and
wherein the reflective characteristic of the first thin-film reflective stack is tunable independently from the corresponding reflective characteristic of the second thin-film reflective stack.
2. The multi-reflector lighting apparatus of claim 1 , further comprising the light source including multiple light emitting diodes.
3. The multi-reflector lighting apparatus of claim 2 , wherein:
the first incident angle is within a relatively high angle range; and
the second incident angle is within a relatively low angle range.
4. The multi-reflector lighting apparatus of claim 3 , wherein:
the relatively high range comprises angles between about 45° and about 90°; and
the relatively low angle range comprises angles between about 0° and about 30°.
5. The multi-reflector lighting apparatus of claim 1 , wherein tuning of each of the corresponding reflective characteristics is a function of a location of the respective first and second thin-film reflective stack and a geometry of the light source.
6. A multi-reflector lighting apparatus, comprising:
a first reflector having a first thin-film reflective stack configured for reflecting light arriving at a first angle from a light source; and
a second reflector having a second thin-film reflective stack configured for reflecting light arriving at a second angle from the light source;
wherein the first and second thin-film reflective thin-film reflective stacks include corresponding reflective characteristics tunable as a function of at least one of a plurality of factors associated with the lighting system; and
wherein the reflective characteristic of the first thin-film reflective stack is tunable independently from the corresponding reflective characteristic of the second thin-film reflective stack.