Patent ID: 8000181

Claim:
A laser radar, comprising: a beam irradiation device for irradiating laser light to a target area; and a detection circuit for detecting a state of the target area based on a receiving state of the laser light reflected on the target area, the beam irradiation device including: a light source for emitting the laser light; an actuator for displacing a propagation direction of the laser light in accordance with a control signal; a scan expansion lens for increasing a swing width of the laser light generated by the actuator; a spectral element, arranged between the actuator and the scan expansion lens, for allowing at least a part of the laser light incident from the actuator to transmit, and reflecting at least a part of the laser light incident from the scan expansion lens in a side direction; and a light detector for receiving the reflected incident from the scan expansion lens and the laser light reflected from the target area and further reflected on the spectral element to output an electrical signal, wherein the detection circuit detects the state of the target area based on the electrical signal outputted from the light detector.