Laser radar device and the laser synthetic aperture radar device

摘要

PROBLEM TO BE SOLVED: To extend a measurable distance and to improve distance measurement resolution in a laser radar apparatus (lidar apparatus).SOLUTION: The laser radar apparatus includes: a detecting signal generation part 12 for generating a detecting signal whose frequency is changed in accordance with a time change; a laser oscillation/modulation part 14 for modulating oscillation light by the detecting signal; a transmitting optical system 17 for transmitting the laser light modulated by the laser oscillation/modulation part 14; a receiving optical system 18 for receiving laser reflected light; a demodulation part 20 for demodulating the received laser reflected light; a delay time setting part 24 for adjusting the timing of a demodulated demodulation signal in accordance with a position of the laser radar apparatus 10; a reference signal generation part 13 for generating a reference signal whose timing is adjusted by the delay time setting part 24; a difference signal generation part 22 for generating a difference signal indicating a difference between the reference signal and the demodulation signal; and an information recording/processing part 30 for acquiring the information of an object based on the difference signal.