Radiation image reading apparatus

Details Radiation image reading apparatus Radiation image reading apparatus

1994-09-02

1996-07-09

Fields, Carolyn E.

Radiant energy

Source with recording detector

Using a stimulable phosphor

G01N 2304

Patent

active

055347096

ABSTRACT:
In a radiation image reading apparatus, a photostimulated phosphor member absorbs a portion of radiation energy transmitted through an object and stores the absorbed radiation energy as a latent image. An excitation light source irradiates excitation light on the photostimulated phosphor member which then emits photostimulated luminescence light which is received and converged by an image reading device, and the latter outputting, as image information, an electrical signal which is dependent on a light intensity of the photostimulated luminescence light. A source of erasing light, having a spectral distribution band positioned substantially in a visible light region and which is normally ON, includes a shutter which is selectively opened to irradiate the erasing light on the photostimulated phosphor during an erasure time and otherwise is closed. A moving mechanism relatively moves the excitation light source and the image reading device with respect to the photostimulated phosphor member, in a moving direction which is perpendicular to the main scan direction.

REFERENCES:
patent: 3859527 (1975-01-01), Luckey
patent: 4496838 (1985-01-01), Umemoto et al.
patent: 5021671 (1991-06-01), Kohda
patent: 5038037 (1991-08-01), Saotome

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