Image scanning read-out apparatus

Details Image scanning read-out apparatus Image scanning read-out apparatus

1984-06-20

1986-04-15

Smith, Alfred E.

Radiant energy

Automatic/serial detection of similar sources

250347, 250351, G03C 516

Patent

active

045829896

ABSTRACT:
An apparatus for reading out an image by scanning comprises a stimulating ray source, a device for scanning a stimulable phosphor sheet carrying an image stored therein by stimulating rays forwardly and backwardly in a main scanning direction, a device for scanning the stimulable phosphor sheet by the stimulating rays in a sub-scanning direction normal to the main scanning direction, and a read-out device for detecting light emitted by the stimulable phosphor sheet when it is exposed to stimulating rays. A converging lens is positioned to converge the stimulating rays, and a light shielding member is positioned at the converging point to intercept the stimulating rays during the backward scanning period. Or, an acousto-optic modulator is positioned between the stimulating ray source and the converging lens to diffract the stimulating rays and generate diffracted light components other than a zero-order diffracted light component during the backward scanning period. A light shielding plate having a pinhole for passing only the zero-order diffracted light component is positioned at the converging point.

REFERENCES:
patent: 4307930 (1981-12-01), Saito
patent: 4484073 (1984-11-01), Ohara et al.

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