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Mid-infrared light hydrocarbon DIAL LIDAR

  • US 5,157,257 A
  • Filed: 06/18/1990
  • Issued: 10/20/1992
  • Est. Priority Date: 06/18/1990
  • Status: Expired due to Term
First Claim
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1. DIAL LIDAR system, comprising:

  • a plurality of coherent light sources, each emitting an output beam at a different wavelength;

    means for directing a portion of the output beams to a receiver portion;

    means for frequency-shifting each of the output beams at a different modulation frequency;

    means for combining the plurality of frequency-shifted output beams into a single transmitted beam directed at a target;

    means for receiving a portion of the transmitted beam which is reflected from the target;

    means for combining the portion of the output beams directed to the receiver portion and the portion of the transmitted beam reflected from the target to produce beat frequencies;

    means for detecting the beat frequencies; and

    means for providing a plurality of signals, each corresponding to the amplitude of a distinct wavelength output beam component of the received portion of the transmitted beam.

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