Radiant energy systems, memories and thermal imaging methods and

Radiant energy – Infrared-to-visible imaging

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Details

136206, 136213, 136214, 250338, H01J 3102, H01J 3500

Patent

active

042503841

ABSTRACT:
A very thin insulator having a dipole structure such as a dielectric material having ferroelectric properties and, preferably, also having thermodielectric properties, is used as the insulator insulating an electrode of an electrode pair from a semiconductor body sandwiched between said electrode pair. The utilization of the charge storage and transfer ability serves as a large scale memory device. Radiation detection and solar energy conversion systems based on establishment of an inversion layer by the bound charge of thermodielectric layer or an electret and irradiation of the semiconductor to separate the electron-hole pair and subsequent collection of minority carriers. Since there is no physical junction, the voltage is high, and can be an alternating current voltage which can be transformed. In one embodiment the dielectric material exhibiting thermodielectric properties provides the bound charge and is used in a thermal imaging system. In such system a matrix or mosaic of charged thermodielectric capacitors biased to near the Curie temperature, are exposed to a source of infrared to be detected. Such mosaic of thermodielectric capacitors is used to convert the IR image to electrical signals.

REFERENCES:
patent: 3243687 (1966-03-01), Hoh
patent: 3256435 (1966-07-01), Astheimer
patent: 3769096 (1973-10-01), Ashkin et al.
patent: 4110616 (1978-08-01), Porter et al.
patent: 4147562 (1979-04-01), Chiang et al.

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