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Ladar transmitter with optical field splitter/inverter

  • US 10,042,159 B2
  • Filed: 07/07/2017
  • Issued: 08/07/2018
  • Est. Priority Date: 02/18/2016
  • Status: Active Grant
First Claim
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1. A method comprising:

  • scanning a first mirror to a plurality of first mirror scan positions, wherein the first mirror scanning step comprises scanning the first mirror at a sinusoidal frequency to define a periodic scan pattern along a first axis within a target scan area for a ladar transmitter that transmits ladar pulses;

    scanning a second mirror to a plurality of second mirror scan positions, wherein the second mirror scanning step comprises scanning the second mirror to define another scan pattern along a second axis within the target scan area, wherein the scanning of the first and second mirrors defines the target scan area;

    while the first and second mirrors are scanning, transmitting a ladar pulse, via the first and second mirrors, toward an optical field splitter/inverter; and

    splitting and inverting, via the field splitter/inverter, the target scan area defined by the scanning of the first and second mirrors, wherein the splitting and inverting directs the transmitted ladar pulse toward a range point within the split and inverted scan area; and

    wherein the field splitter/inverter is positioned such that the target scan area of the ladar transmitter moves relatively slower in a middle section of the split and inverted scan area than it does at outer sections of the split and inverted scan area.

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