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Radiation excited phosphor screen and method for manufacturing the same

  • US 4,437,011 A
  • Filed: 06/11/1981
  • Issued: 03/13/1984
  • Est. Priority Date: 06/16/1980
  • Status: Expired due to Term
First Claim
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1. A radiation excited input phosphor screen comprising:

  • a substrate having a substantially smooth surface;

    a first phosphor layer vapor-deposited on said smooth surface of said substrate and including phosphor crystal particles having mean diameter of 15 μ

    m or less; and

    a second phosphor layer of alkali halide phosphor material vapor-deposited on said first phosphor layer and including individual columnar crystals grown substantially vertically with respect to said smooth surface of said substrate, said columnar crystals standing close together with fine spaces therebetween, said second phosphor layer having a thickness ten or more times that of said first phosphor layer.

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