Ir coatings and methods
OwnerMiles Rains, Howard R. Grayinventors
Life of this patent
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Abstract
A lamp burner having a quartz body comprising a light emitting chamber intermediate a pair of end portions. A filament may be positioned within the light emitting chamber and a multilayer optical coating provided on at least a portion of the body. The coating may comprise a plurality of layers of a first material comprising silica, a plurality of layers of a second material comprising rutile titanium dioxide, and a plurality of layers of a third material having an index of refraction intermediate the indices of refraction of the layers of first material and the layers of second material.
Claims38
A lamp burner comprising:
- a quartz body comprising a light emitting chamber intermediate a pair of end portions;
- a filament positioned within said light emitting chamber;
- and
- a multilayer optical coating on at least a portion of said body, said coating comprising a plurality of layers of a first material comprising silica, a plurality of layers of a second material comprising rutile titanium dioxide, and a plurality of layers of a third material having an index of refraction intermediate the indices of refraction of said layers of first material and said layers of second material.
A double-ended quartz burner having an infrared reflecting coating on at least a portion thereof, said coating comprising layers of a low refractive index material, a high refractive index material, and an intermediate refractive index material.
A double-ended quartz burner comprising a lamp body with a multilayer infrared reflecting coating on at least a portion of said body, wherein said burner operates at a rated power of one hundred watts or less with a luminous efficiency of at least thirty lumens per watt over a period of time of at least one thousand hours.
In a double-ended quartz halogen incandescent burner comprising a lamp body with a multilayer infrared reflective coating having layers of high refractive index material and low refractive index material on at least a portion of said body, the improvement wherein said coating includes layers of material having a refractive index intermediate the refractive indices of the high index and low index materials.
A method of improving the lumens per watt a double-ended quartz halogen incandescent burner comprising sputter coating at least a portion of the burner with a multilayer infrared reflecting coating having layers of a low index refractive index material, a high refractive index material, and an intermediate refractive index material.
A method comprising:
- providing a lamp burner having a quartz body forming a light emitting chamber housing an incandescent filament intermediate a pair of end portions;
- sputter coating at least a portion of the light emitting chamber to thereby form a multilayer infrared reflecting coating having layers of a low refractive index material, a high refractive index material, and an intermediate refractive index material.
Dependencies are inferred from the claim text.