Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2007-06-05
2007-06-05
Porta, David (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
Reexamination Certificate
active
10883095
ABSTRACT:
A photodetector for detecting the polarization or wavelength of incident infrared radiation (IR) is described. The polarization sensitive photodetector operates using two sets of patches and corresponding cavities, the first set resonating with IR having a first polarization, while the second set resonates with IR having an orthogonal, second polarization. The polarization sensitive photodetector thus outputs two signals, proportional to the first and second polarizations, respectively. The wavelength sensitive photodetector operates using two sets of patches and corresponding cavities, the first set resonating at a first IR wavelength, while the second set resonates at a different IR wavelength. The wavelength sensitive photodetector thus outputs two signals, proportional to the first and second wavelengths, respectively. The patches have a length corresponding to odd multiples of the effective wavelength of the IR, while the thickness of the photodetector is typically one fourth of the effective wavelength.
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Davis Daren C.
Lockheed Martin Corporation
Porta David
Sung Christine
Walton James E.
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