Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Patent
1990-02-02
1991-10-08
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
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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Glick Edward J.
Hannaher Constantine
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