Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1996-07-15
1998-06-16
Le, Que
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
2502141, 385 11, 369110, 257 21, G02F 101
Patent
active
057675074
ABSTRACT:
A device for detecting polarization of light comprising a first photodetector tuned to absorb TE polarization, a second photodetector tuned to absorb TM polarization, and a circuit for comparing an output from the first and second photodetector for generating a polarization output. The first photodetector comprises a first reflector, an absorption layer on top of the first reflector, and a second reflector on top of the absorption layer. The second photodetector comprises a third reflector on top of an absorption layer, and a fourth reflector disposed under absorption layer.
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Onat Bora
Unlu M. Selim
Le Que
Trustees of Boston University
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