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3-D imaging multiple target laser radar

  • US 6,414,746 B1
  • Filed: 11/24/1999
  • Issued: 07/02/2002
  • Est. Priority Date: 11/24/1999
  • Status: Expired due to Term
First Claim
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1. A device for imaging one or more three dimensional objects immersed in a light conducting medium comprising:

  • a pulsed light source;

    means for transmitting light from said pulsed light source into said medium;

    optics for collecting light from said medium during the time for light to transit from said pulsed light source, reflect from said objects and be collected by said optics;

    a sensor means for detecting said collected light, said sensor means comprising means for converting said collected light into electrical charge, chip means comprising multiplexing and chip output electronics, a plurality of collection or detection means for collecting or detecting the electrical charge from said conversion means, a plurality of unit cell processing electronics including memory units for storing data related to a first return transit time for a reflected laser pulse from a target pixel, and additional memory units for storing data related to the amplitude of laser pulse reflections from one or plurality of targets, including control circuitry by which the sampling time intervals of said memory units for storing data related to the amplitude of laser pulse reflections is independently controlled, from unit cell to unit cell and including output amplifier electronics adapted to provide signals to said multiplexing and chip output electronics, drive electronics for providing voltages and for providing timing for said unit cell processing electronics, output amplifier electronics and said multiplexing and chip output electronics, and output electronics for conditioning the signals from said memory units for data processing;

    a computer for processing data from said output electronics.

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