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Spectral wedge interference filter combined with purifying filters

  • US 2,708,389 A
  • Filed: 01/09/1951
  • Issued: 05/17/1955
  • Est. Priority Date: 01/09/1951
  • Status: Expired due to Term
First Claim
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1. SPECTRUM PRODUCING MEANS COMPRISING A WEDGE INTERFERENCE FILTER AND AT LEAST TWO DIFFERENT COLOR FILTERS PLACED SIDE BY SIDE AND PERMANENTLY ATTACHED TO THE WEDGE INTERFERENCE FILTER, EACH OF SAID COLOR FILTERS PASSING LIGHT OF WAVELENGTHS WITHIN THE RANGE OF THE SPEC-

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