Radiation image read-out apparatus

Details Radiation image read-out apparatus Radiation image read-out apparatus

1988-07-05

1990-06-05

Fields, Carolyn E.

Radiant energy

Automatic/serial detection of similar sources

G01N 2304

Patent

active

049316427

ABSTRACT:
A radiation image read-out apparatus is constituted for exposing a recording material provided with a stimulable phosphor and carrying a radiation image stored thereon to stimulating rays which cause the recording material to emit light in proportion to the stored radiation energy, and photoelectrically detecting the emitted light to read out the radiation image. The apparatus is provided with a multi-layer optical filter whose reflectivity with respect to stimulating rays increases as the angle of incidence of stimulating rays increases. The multi-layer optical filter is disposed in the optical path of stimulating rays in the vicinity of the recording material or formed on the surface of the recording material on the stimualting ray irradiation side, thereby increasing the efficiency of utilization of stimulating rays. In one embodiment, a second multi-layer optical filter is disposed in the vicinity of or formed on the surface of the recording material on the emitted light detection side. The second filter substantially reflects stimulating rays and substantially transmits the emitted light.

REFERENCES:
patent: 4543479 (1985-09-01), Kato
patent: 4661704 (1987-04-01), de Leeuw et al.
patent: 4691232 (1987-09-01), Lange

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