Apparatus for reading-out stimulable phosphor, radiographic reco

Details Apparatus for reading-out stimulable phosphor, radiographic reco Apparatus for reading-out stimulable phosphor, radiographic reco

1989-12-26

1990-11-13

Fields, Carolyn E.

Radiant energy

Automatic/serial detection of similar sources

250368, G01N 2304

Patent

active

049703943

ABSTRACT:
To minimize the adverse effects of "flare" in reading-out stimulable phosphor recording elements, the light-collecting face of a photodetector is provided with a multiplicity of sharp, light-transparent, optical projections. By a combination of reflections and refractions, such optical projections serve to absorb substantially all incident photons thereby preventing phosphor-stimulating photons from being reflected by the photodetector's light-collecting face and exciting non-addressed regions of the recording element. Preferably, the optical projections take the form of a sawtooth array of optical wedges; however, pyramid-shaped and cone-shaped projections are also disclosed.

REFERENCES:
patent: 3769509 (1973-10-01), Martone et al.
patent: 4680473 (1987-07-01), Matsuda et al.
patent: 4816688 (1989-03-01), Saotome

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