Boots – shoes – and leggings
Patent
1989-09-13
1992-01-07
Black, Thomas G.
Boots, shoes, and leggings
364576, 359559, G06F 15332
Patent
active
050797301
ABSTRACT:
The invention relates to a process for the evaluation of time signals with periodic components or pulse sequences, in which the time signal is digitized sectionally, represented on a light modulator transilluminated with coherent light, focused in a Fourier plane and the image in the Fourier plane, which contains the frequency of the time signal, is further processed. The first section of the digitized time signal is written into a line (26) of the light modulator (6). Each further section is represented in a further line (26). The apparatus for carrying out the process has a digitizing device and a controller representing a sectionally digitized time signal on the light modulator. The light modulator is transilluminated by coherent light of a light source. The light is focused on a screen arranged in a Fourier plane by an optical system. A line controller is provided as controller.
REFERENCES:
patent: 3872293 (1975-03-01), Green
patent: 3944820 (1976-03-01), Stotts
patent: 4418394 (1983-11-01), Tai
Robert H. Kingston, signal correlation using a one-dimensional electroabsorptive CCD spatial light modulator, Jul. 84, 954-961, proceedings of the IEEE.
Butefisch Karl A.
Kompenhans Jurgen
Black Thomas G.
Deutsche Forschungsanstalt fur Luft - und Raumfahrt e.V.
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