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Narrow-band, air-cooled light fixture

  • US 4,321,659 A
  • Filed: 06/30/1980
  • Issued: 03/23/1982
  • Est. Priority Date: 06/30/1980
  • Status: Expired due to Term
First Claim
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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.

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