Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1987-09-03
1989-03-21
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
357 5, H01J 4014
Patent
active
048145980
ABSTRACT:
An apparatus for measuring the intensity of incident optical radiation utilizes the properties of superconductivity films. The apparatus may include at least one Josephson junction having the optical radiation incident thereupon, an electronic circuit coupled to receive a signal from the Josephson junction proportional to the incident radiation. The Josephson junction has a time-current switching threshold current selected to switch the function 50% of the time. A feedback loop from the electronic circuit maintains the function operation. One or more junctions may be used to monitor radiation of different wavelengths or to produce optical images.
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Hypres, Inc.
Nelms David C.
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