Boots – shoes – and leggings
Patent
1992-04-21
1993-11-30
Mai, Tan V.
Boots, shoes, and leggings
G06G 719
Patent
active
052671887
ABSTRACT:
A multi-channel acousto-optic spectrometer employs a multi-channel Bragg cell, Fourier transform imaging optics and two-dimensional charge coupled device photodetector array to simultaneously process a plurality of parallel channels of respectively adjacent frequency bands of a wideband radio frequency signal. The signal modulation and optical transmission characteristics of the spectrometer are such that the respective acousto-optic channels to which the respective sub-bands portions of the signal are applied do not interfere with one another and are imaged upon closely spaced regions of the two-dimensional photodetector array. The opto-electronic responses of the respective imaging regions of the array are transferred from an imaging area of the photodetector array, upon which a multi-channel acousto-optically modulated light beam is projected by the spectrometer's Fourier transform-imaging optics, to a non-imaging area of the photodetector array, so as to permit a new spectrometer input signal to be imaged onto the two-dimensional photodetector array. The contents of each frequency channel of a respective sub-band are then transferred in parallel to an output accumulator register, which is read out serially and digitized for application to downstream signal processing and display circuitry.
REFERENCES:
patent: 3738731 (1973-06-01), Chandra et al.
patent: 4729114 (1988-03-01), Kingston et al.
patent: 4764891 (1988-08-01), Grinberg et al.
patent: 5167002 (1992-11-01), Fridhandler
Carter, III James A.
Pape Dennis R.
Mai Tan V.
Photonic Systems, Inc.
Wands Charles E.
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