Narrow-band, air-cooled light fixture
First Claim
1. A light fixture for projecting energy in a narrow spectral range which comprises:
- an elongated housing having openings at each end;
a plurality of spaced filters in a pack closing the first end of said housing;
at least one opening in each of said filters adapted to permit air to pass through said filter pack;
said at least one opening of each filter arranged so that no straight line-of-sight exists through openings in all filters in said pack;
said filter pack adapted to allow only energy in a selected spectral range to pass therethrough and to absorb energy out of said range;
a broad spectrum energy source intermediate to the ends of said housing adapted to emit energy towards said filter pack; and
a cooling means adjacent to the second end of said housing adapted to draw air in through a first end of said housing through said filter pack and past said energy source and out said second end of said housing;
whereby energy absorbed in said housing, energy source and filter pack is removed.
3 Assignments
0 Petitions
Accused Products
Abstract
A simple, light-weight air-cooled filter arrangement for a narrow band pass filtered light fixture. In lighting fixtures such as infrared energy sources or stage lighting, it is necessary to filter a conventional broad spectrum energy source so that only energy in the desired region is transmitted. These filters which absorb energy in bands other than that being transmitted tend to become very hot. A light fixture is provided having a plurality of spaced filters near a light output end. Each filter has one or more openings offset from the openings in other filters so that no single straight path passes through openings in all filters. A light source is provided adjacent to the filter pack, with a fan positioned on the side of the source opposite the filter pack, with openings in the fixture housing beyond the fan. In operation, the filter pack absorbs energy in all spectral regions other than the band which the pack was designed to pass. The fan draws air in through the filter pack, past the light source and ejects it out through the openings. This fixture is simple, light-weight and cool in operation.
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Citations
7 Claims
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1. A light fixture for projecting energy in a narrow spectral range which comprises:
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an elongated housing having openings at each end; a plurality of spaced filters in a pack closing the first end of said housing; at least one opening in each of said filters adapted to permit air to pass through said filter pack; said at least one opening of each filter arranged so that no straight line-of-sight exists through openings in all filters in said pack; said filter pack adapted to allow only energy in a selected spectral range to pass therethrough and to absorb energy out of said range; a broad spectrum energy source intermediate to the ends of said housing adapted to emit energy towards said filter pack; and a cooling means adjacent to the second end of said housing adapted to draw air in through a first end of said housing through said filter pack and past said energy source and out said second end of said housing; whereby energy absorbed in said housing, energy source and filter pack is removed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification