Variable scanning region coaxial transceiving scanning laser radar

Abstract

The invention relates to a variable scanning region coaxial transceiving scanning laser radar, which belongs to the field of laser management. A laser emission and signal triggering module can transmit collimated laser to an initial signal detector to generate an initial signal. A submarine-launched mirror module lifts the laser in the height direction by means of a combination of two reflectors in the vertical direction, and reflects the laser onto an MEMS scanning mirror by means of a fourth reflector. The coaxial transceiving module reflects the laser to a detected plane by means of the MEMS scanning mirror, the laser is received by means of an off-axis paraboloid reflector, and the laser is received by means of the echo signal detector after being reflected by means of a fifth reflector. The scanning laser radar realizes scanning in a certain range through the rotation of a reflecting surface in the MEMS scanning mirror, and a scanning field of view of the MEMS scanning mirror canbe enlarged through adjusting a relative angle between the fourth reflector and the MEMS scanning mirror. The variable scanning region coaxial transceivingc has the advantages of compact structure, large scanning field of view, variable scanning region and high light concentration ability, and can reduce the size of the scanning radar by means of the submarine-launched mirror module.

Description

technical field [0001] The invention relates to a variable scanning area coaxial transceiving scanning laser radar, in particular to a variable scanning area coaxial transmitting and receiving scanning laser radar which is compact and variable scanning area and belongs to the field of laser measurement. Background technique [0002] Lidar uses laser as the signal light source, and uses the receiving system to collect the echo signal reflected by the object, and compares it with the initial signal to obtain the time or phase change, so as to obtain accurate information on the distance of the measured object. Because the laser has the advantages of small beam divergence, concentrated energy, good directivity, and high repetition frequency. This enables the laser radar to realize long-distance and high-precision measurement of the measured object. At present, lidar is widely used in aerospace, remote sensing detection, measurement and intelligent driving and other fields. [...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of fixed scanning area of ​​traditional laser radar, limited aperture of receiving system and large overall volume.

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