Patent ID: 8836920

Claim:
A structure of an optical path for laser range finding comprising: a main body and a light-emitting unit assembled in the main body; the main body having a transmitting channel, a receiving channel and a calibration channel defined therein, the calibration channel communicating with the transmitting channel and the receiving channel; the light-emitting unit assembled in the transmitting channel, the light-emitting unit including a conductive substrate and two laser chips both mounted on the conductive substrate; one of the laser chips provided for emitting an external optical beam, and the other laser chip provided for emitting an internal optical beam, the external optical beam emitted through the transmitting channel, the internal optical beam emitted to the receiving channel via the calibration channel, an included angle being defined between the external optical beam and the internal optical beam; and a receiver mounted in the receiving channel to receive the external optical beam reflected by a measurement object and the internal optical beam; wherein the external optical beam and the internal optical beam do not interfere with each other because of the included angle.