Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1984-03-08
1985-07-16
Herbert, Thomas J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
2504831, 2504861, 428341, 428457, 428458, 428690, 428691, B32B 516, B32B 1508, G01J 158
Patent
active
045296472
ABSTRACT:
A radiographic image conversion screen comprising a support, a first fluorescent layer formed on the support and consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer and consisting essentially of a green emitting rare earth oxysulfide phosphor. The green emitting rare earth oxysulfide phosphor is represented by the formula: (Ln.sub.1-i, Yi, Tba, Rb).sub.2 O.sub.2 S where Ln is at least one element selected from the group consisting of La, Ga and Lu, R is at least one element selected from the group consisting of Dy, Pr, Yb and Nd, and i, a and b are numbers within the ranges of 0.ltoreq.i.ltoreq.0.35, 0.0005.ltoreq.a.ltoreq.0.09 and 0.0002.ltoreq.b.ltoreq.0.01 respectively.
REFERENCES:
patent: 3294569 (1966-12-01), Messineo et al.
patent: 3872309 (1975-03-01), DeBelder et al.
patent: 3936644 (1976-02-01), Rabatin
patent: 4224524 (1980-09-01), Suys et al.
Maeoka Hidehiko
Miura Norio
Shimiya Keiji
Shimizu Etsuo
Suzuki Yujiro
Herbert Thomas J.
Kasei Optonix Ltd.
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