Radiation image read-out apparatus

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

1994-10-17

1995-10-24

Fields, Carolyn E.

Radiant energy

Source with recording detector

Using a stimulable phosphor

G03B 4200, G03B 4202

Patent

active

054612403

ABSTRACT:
A stimulable phosphor sheet, on which a radiation image has been stored, is exposed to stimulating rays, which cause it to emit light in proportion to the amount of energy stored thereon during its exposure to radiation, and the emitted light is detected by a photodetector. A stimulating ray source for producing the stimulating rays comprises a laser diode, which produces a laser beam having a wavelength .lambda.1, a solid laser crystal, which is pumped by the laser beam having been produced by the laser diode and thereby produces a laser beam having a wavelength .lambda.2, and a nonlinear optical crystal for converting the laser beam having the wavelength .lambda.2 into a laser beam having a wavelength .lambda.3, which falls within a stimulation wavelength range for the stimulable phosphor sheet. A first filter is located in an optical path between the stimulable phosphor sheet and the photodetector. The first filter filters out the laser beam having the wavelength .lambda.3 and substantially allows the passage of only the light emitted by the stimulable phosphor sheet. A second filter is located in an optical path between the stimulating ray source and the photodetector. The second filter filters out the laser beam having the wavelength .lambda.1 and the laser beam having the wavelength .lambda.2.

REFERENCES:
patent: 4689482 (1987-08-01), Horikawa et al.
patent: 4832469 (1989-05-01), Noguchi et al.
patent: 4876452 (1989-10-01), Horikawa
patent: 4893012 (1990-01-01), Agano et al.
patent: 4943871 (1990-07-01), Miyagawa
patent: 5047643 (1991-09-01), Ogura

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