Focussed radiographic camera

Details Focussed radiographic camera Focussed radiographic camera

1976-11-22

1978-01-10

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

250368, G01T 120

Patent

active

040681262

ABSTRACT:
A radiographic camera of the form employing a scintillator for producing optical photons in response to incident gamma and X-radiation, a collimator positioned between a subject emitting such radiation and the scintillator for guiding the radiation to the scintillator, and a detector of optical photons for signaling the positions of points of impingement of quanta of the incident radiation upon the scintillator to produce an image of the subject, the improvement being a Fresnel focussing means located alongside the scintillator for directing the optical photons to the detector. The Fresnel focussing means takes the form of a segmented mirror at the front surface of the scintillator and a Fresnel lens at the back surface of the scintillator.

REFERENCES:
patent: 3769509 (1973-10-01), Martone et al.
patent: 3814938 (1974-06-01), Martone et al.
patent: 3859531 (1975-01-01), Van Dijk

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