X-ray image converter devices utilizing rare earth oxyhalide pho

Details X-ray image converter devices utilizing rare earth oxyhalide pho X-ray image converter devices utilizing rare earth oxyhalide pho

1983-04-08

1985-02-05

Anderson, Bruce C.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

2504831, 2504871, G01J 158

Patent

active

044980086

ABSTRACT:
An improved X-ray image converter is disclosed which utilizes a phosphor layer of plate-like rare earth oxyhalide phosphor crystals having said phosphor crystals physically aligned to improve light emission from the phosphor layer. More particularly, said phosphor layer is formed with the plate-like crystals being aligned generally parallel to the longitudinal axis of said phosphor layer at both surface regions while the intermediate phosphor crystals are aligned generally perpendicular to said longitudinal axis. Said improvement can be provided during formation of phosphor layer from a liquid suspension by introducing particular velocity gradients in the flow pattern of said liquid suspension.

REFERENCES:
patent: Re28592 (1975-10-01), Rabatin et al.
patent: 3591516 (1971-07-01), Rabatin
patent: 4315979 (1982-02-01), Brimes et al.

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