Radiation image information read apparatus

Details Radiation image information read apparatus Radiation image information read apparatus

1996-05-22

1998-10-13

Glick, Edward J.

Radiant energy

Source with recording detector

Using a stimulable phosphor

250584, G03B 4202

Patent

active

058215522

ABSTRACT:
In a radiation image information read apparatus, a stimulable phosphor sheet, on which radiation image information has been stored, is scanned with stimulating rays, and light emitted by the stimulable phosphor sheet upon stimulation thereof is photoelectrically detected by a photodetector and converted into an electric image signal bearing thereon the radiation image information. A solid laser crystal which emits a laser beam having a wavelength of .lambda.2 pumped by a laser beam at a wavelength of .lambda.1 from a laser diode is combined with a nonlinear optical crystal which converts the laser beam at .lambda.2 to a laser beam at .lambda.3 within the stimulating wavelength range of the stimulable phosphor sheet, is employed as a source of the stimulating light. A filter which cuts the laser beam at .lambda.3 and transmits light emitted from the stimulable phosphor sheet, is disposed between the stimulable phosphor sheet and the photodetector. There are disposed between the stimulating light source and the photodetector a lens which focuses the laser beam at .lambda.3 on a predetermined position, and an aperture plate which is disposed in the predetermined position and permits most of the laser beam at .lambda.3 to pass therethrough while cutting most of the laser beam at .lambda.1.

REFERENCES:
patent: 4818880 (1989-04-01), Matsuda et al.
patent: 5461240 (1995-10-01), Karasawa

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