| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a laser radar device achieving stable target detection while ensuring an S/N ratio of reflected light from a target object with respect to a radiated laser beam, and achieving target ranging with secure irradiation direction control and high accuracy based on the stable target detection.SOLUTION: Polarizers (#1) 12 and (#2) 15 and polarizer drive units (#1) 13 and (#2) 16 rotating the polarizers (#1) 12 and (#2) 15 to make polarization directions thereof variable are provided just in front of light-receiving passages of a reflected light receiver 14 and an imaging unit 17, respectively. The reflected light receiver 14 and the imaging unit 17 receive reflected light via their respective polarizers (#1) 12 and (#2) 15, a received light processing unit 22 and an image processing unit 25 at the later stages detect a target from the reflected light, and the polarizers (#1) 12 and (#2) 15 are rotated so that the polarization direction of each of the polarizers (#1) 12 and (#2) 15 matches a polarization direction of the reflected light to achieve a highest S/N ratio of the target at the time of detection.</p> |
