High gain coatings and methods
OwnerMiles Rains, Howard R. Gray +2inventors
InventorsMiles Rains, Howard R. Gray, Leroy A. Bartolomei, Norman L. Boling
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Abstract
A halogen incandescent burner comprising a quartz body comprising a light emitting chamber, a filament positioned within the light emitting chamber, and a multilayer optical coating on at least a portion of the chamber. The coating may include a plurality of layers of a low refractive index material and a high refractive index material having a total thickness of at least nine microns, wherein the gain of the burner is at least 1.7. The high refractive index material may comprise tantala and the low refractive index material may comprise silica.
Claims29
A halogen incandescent burner comprising:
- a quartz body comprising a light emitting chamber;
- a filament positioned within said light emitting chamber;
- and
- a multilayer optical coating on at least a portion of said chamber, said coating comprising a plurality of layers of a low refractive index material and a high refractive index material having a total thickness of at least nine microns,
- wherein the gain of said burner is at least 1.7.
A halogen incandescent burner having an infrared reflecting coating on at least a portion thereof, said coating comprising alternating layers of tantala and silica and having a total thickness of greater than nine microns and a gain of at least 1.7.
A halogen incandescent burner having an infrared reflecting coating on at least a portion thereof, said coating comprising alternating layers of tantala and silica and having a total thickness of greater than nine microns and an average reflectance over the range of wavelengths from 800 nm to 1500 nm of at least 97.
A halogen incandescent burner having an infrared reflecting coating on at least a portion thereof, said coating comprising alternating layers of tantala and silica and having a total thickness of greater than nine microns and a luminous efficiency of at least thirty lumens per watt over at least five hundred hours of operation.
A method of improving the lumens per watt of a halogen incandescent burner comprising sputter coating at least a portion of the burner with a multilayer infrared reflecting coating having alternating layers of tantala and silica a total thickness of at least nine microns.
A method comprising:
- providing a lamp burner having a quartz body forming a light emitting chamber housing an incandescent filament;
- sputter coating at least a portion of the light emitting chamber to thereby form a multilayer infrared reflecting coating having a plurality of layers of tantala and silica and a total thickness of at least nine microns,
- wherein the gain realized by coating the burner is at least 1.7.
Dependencies are inferred from the claim text.