Detectors of penetrating radiation

Details Detectors of penetrating radiation Detectors of penetrating radiation

1978-08-04

1981-03-10

Smith, Alfred

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

G01T 122

Patent

active

042556600

ABSTRACT:
The invention relates to detectors of penetrating radiation, in particular x-radiation. The detector comprises a photoconductive material to which two electrical signals are applied. An output signal is detected and in the presence of radiation incident on the detector this includes a component formed by mixing of the two input signals, an harmonic if they are of the same frequency. The amplitude of that component is proportional to the intensity of the incident radiation. There is also a background component which should either be reduced to insignificant proportions or removed. Advantageous electrode arrangements for such a device are also disclosed.

REFERENCES:
patent: 3778614 (1973-12-01), Hounsfield
patent: 3924129 (1975-02-01), LeMay
patent: 3949210 (1976-04-01), Eichinger et al.
patent: 4028548 (1977-06-01), Scott
patent: 4045675 (1977-08-01), Kingsley et al.
patent: 4078178 (1978-03-01), Lowes

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