Coherent Imaging Devices : Extended Capability For 1-D Multichannel Processing

Guy Lebreton

doi:10.1117/12.936122

15 April 1983 Coherent Imaging Devices : Extended Capability For 1-D Multichannel Processing

Guy Lebreton

Proceedings Volume 0422, 10th Intl Optical Computing Conf; (1983) https://doi.org/10.1117/12.936122
Event: 10th International Optical Computing Conference, 1983, Cambridge, United States

Abstract

Long duration signals are recorded as a cohe-rent image in a TV-type raster format on 300 lines, each line being a time,window of duration 1 s with time- bandwidth capacity of 342. A holographic fil-ter produces 3 adjacent images with vertical shifts of 1 line, yielding continuous lines 3 times longer (3 s width) with a sliding time-window stepped by 1 s. An optical multichannel 1 D Fourier transform then performs a time-frequency representation, with a frequency resolution increased by a factor 3. Such a system makes the geometry of coherent light valves more convenient for the multichannel processing of signal with large BT products, for instance in passive Sonar.

Citation Download Citation

Guy Lebreton "Coherent Imaging Devices : Extended Capability For 1-D Multichannel Processing", Proc. SPIE 0422, 10th Intl Optical Computing Conf, (15 April 1983); https://doi.org/10.1117/12.936122

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