Radiation detector

Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system

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Details

2503362, G01T 124, G01T 100

Patent

active

050556860

ABSTRACT:
A composite radiation detection and indicating device comprises first, third and fifth layers of a transparent conductive material, a second layer of semiconductive diamond between the first and third layers, and a fourth layer of liquid crystal material between the third and fifth layers. The layers are sandwiched together so that a diodic structure having a radiation-dependent charge storage characteristic is defined by the first, second and third layers, and a liquid crystal display element is defined by the third, fourth and fifth layers. The invention extends to a radiation detector including the composite device, together with an oscillator for applying a charge to the diodic structure, and a sensor for monitoring the decay of the stored charge. A voltage is applied to the liquid crystal display element to cause it to change state when the charge stored by the diodic structure decays below a predetermined limit.

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patent: 4846559 (1989-07-01), Kniffler
patent: 4871234 (1989-10-01), Suzuki
patent: 4929569 (1990-05-01), Yaniu et al.

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