Radiant energy – Source with recording detector – Using a stimulable phosphor
Patent
1993-10-19
1996-01-09
Fields, Carolyn E.
Radiant energy
Source with recording detector
Using a stimulable phosphor
2504844, 2504871, 250586, G01N 2304
Patent
active
054830818
ABSTRACT:
A stimulable phosphor sheet comprises a stimulable phosphor layer, and a colored layer, which is located on one side of the stimulable phosphor layer and contains a coloring agent. The coloring agent is capable of selectively absorbing stimulating rays, The stimulable phosphor sheet is scanned with the stimulating rays from the side opposite to the colored layer. The light, which is emitted by the two surfaces of the stimulable phosphor sheet during its scanning with the stimulating rays, is photoelectrically detected from the two surfaces of the stimulable phosphor sheet, and an image signal representing the radiation image is thereby obtained. The sharpness of an image reproduced from the image signal is thereby efficiently kept high. A second embodiment provides an optical layer on a stimulable phosphor sheet, wherein the optical layer transmits only light which is incident from a direction substantially normal to the surface of the stimulable phosphor sheet. The optical layer prevents the rays which are irradiated from a side of the phosphor sheet having the optical layer from being reabsorbed by the phosphor sheet after reflecting from a photodetector which is located on the same side of the phosphor sheet as the optical layer and which detects light emitted from the phosphor sheet in response to stimulating rays.
REFERENCES:
patent: 4258264 (1981-03-01), Kotera et al.
patent: 4276473 (1981-06-01), Kato et al.
patent: 4315318 (1982-02-01), Kato et al.
patent: 4346295 (1982-08-01), Tanaka et al.
patent: 4387428 (1983-06-01), Ishida et al.
patent: 4394581 (1983-07-01), Takahashi et al.
Fields Carolyn E.
Fuji Photo Film Co. , Ltd.
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