Fluorescent screen

Details Fluorescent screen Fluorescent screen

1976-02-19

1978-07-25

Borchelt, Archie R.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

2523014R, G01J 158, G01N 2138

Patent

active

041031733

ABSTRACT:
A fluorescent screen whose fluorescent material is a pure rare earth compd such as a compound of the formulas (A.sub.2 O).sub.a (Ln.sub.2 O.sub.3).sub.b (P.sub.2 O.sub.5).sub.c, (Ln.sub.2 O.sub.3).sub.p (Al.sub.2 O.sub.3).sub.q (B.sub.2 O.sub.3).sub.r, or LnZrF.sub.7 wherein a is zero or an integer greater than zero, b, c, p, q, and r are integers greater than zero, A is at least one alkali metal, and Ln is at least one rare earth metal.

REFERENCES:
patent: 2851612 (1958-09-01), Davey
patent: 3617743 (1971-11-01), Rabatin et al.
patent: 3868512 (1975-02-01), Prener et al.
patent: 3925674 (1975-12-01), D'Silva et al.

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