Radiographic camera with internal mask

Details Radiographic camera with internal mask Radiographic camera with internal mask

1976-10-26

1978-05-30

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

G01T 120

Patent

active

040925404

ABSTRACT:
A radiographic camera having a scintillator and an array of photodetectors positioned for viewing a common region of the scintillator, and wherein a mask system is interposed between the scintillator and the array of photodetectors for increasing the resolution of an image produced by the camera. The mask system has a pair of mask plates which are spaced apart and have similar formats of opaque materials thereon. The mask system provides a more rapid variaton in the intensity of light received at a photodetector as a function of locations of scintillations on the scintillator. A reference signal source providing a signal pattern in accordance with the intensity variation is utilized for decoding shadows cast by the mask to produce the image.

REFERENCES:
patent: 3748470 (1973-07-01), Barrett
patent: 3784819 (1974-01-01), Martone et al.

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