Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1979-10-17
1981-11-24
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
G01J 132
Patent
active
043026672
ABSTRACT:
A near millimeter bistable device having a source of electromagnetic radiation in optical alignment with a variable reflecting means in the form of a Schottky barrier diode corner cube assembly. Interposed between the radiation source and the variable reflecting means is a beam splitter which reflects a beam of energy from the variable reflecting means through another beam splitter to a detector. The voltage produced by the detector is fed through a feedback circuit back to the variable reflecting means in order to vary the reflectivity thereof. In this manner the output of the device emanating from the other beam splitter has two stable conditions, one of relatively high output power and one of relatively low output power.
REFERENCES:
patent: 4092530 (1978-05-01), Wise
"Far-I.R. Heterodyne Radiometric Measurements with Quasi-Optical Schottky Diode Mixers" by Fetterman et al., Appl. Phys. Lett., Jul. 1978, pp. 151-154.
Chiao Raymond Y.
Fetterman Harold R.
Schlossberg Howard R.
Erlich Jacob N.
Nelms David C.
Singer Donald J.
The United States of America as represented by the Secretary of
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