Laser radar

A LIDAR, comprising:

• a first transmitting unit and a second transmitting unit configured to emit a first detection laser beam and a second detection laser beam, respectively;
• a transmitting optical assembly disposed at a transmitting end and comprising a transmitting lens, the transmitting optical assembly further comprising a focus-changing transmitting lens disposed in a second optical path of the second detection laser beam and outside a first optical path of the first detection laser beam;
• a receiving optical assembly disposed at a receiving end comprising a receiving lens;
• and
• a first receiving unit and a second receiving unit configured to receive a first echo of the first detection laser beam and a second echo of the second detection laser beam, respectively, and convert the first echo and the second echo into electrical signals,
• wherein a first transmitting optical distance traveled by the first detection laser beam between the first transmitting unit and the transmitting lens is different from a second transmitting optical distance traveled by the second detection laser beam between the second transmitting unit and the transmitting lens;
• and
• wherein a first receiving optical distance traveled by the first echo between the receiving lens and the receiving unit is different from a second receiving optical distance traveled by the second echo between the receiving lens and the second receiving unit.