| 摘要 |
PROBLEM TO BE SOLVED: To provide a low cost and small-sized laser radar device in a multilayer scan type laser radar device which divides a measurement angle range in the vertical direction into a plurality of regions.SOLUTION: A laser radar device includes: a light source and modulated light beam generation means emitting a light beam; a light receiving element 11 for receiving the reflected light; reflected light condensing means 10 for condensing light and guiding it to the light receiving element; a rotatably configured rotary mechanism 9; and a mirror group 4 provided at the rotary mechanism for scanning the light beam in the horizontal direction and for guiding the reflected light to the reflected light condensing means. A detection angle range in the vertical direction with respect to the emission direction is divided into a plurality of layers, and the mirror group includes reflection mirror surfaces in which tilting angles different from each other are provided with respect to the rotational axis of the rotary mechanism. The modulated beam generation means emits at least equal to or more than two light beams with different emission angles in the vertical direction, and the difference of the emission angles provided at the plurality of light beams is equal to the detection angle range for one layer in the vertical direction. |
