Multi-beam transceiving bistatic optical system

Abstract

The invention provides a multi-beam transceiving bistatic optical system, which comprises a laser beam splitting transmitting module, an echo signal transmission module and an echo signal receiving module. After a laser of the laser beam splitting transmitting module emits light, a laser beam expander expands laser beams, and a diffraction beam splitting module DOE divides the laser beams into 64laser beams for dot matrix transmission; after being reflected by a target, emergent laser is received by a telescope of the echo signal transmission module and coupled into a corresponding optical fiber array, and echo signals pass through the optical fiber array, an optical filter of the echo signal receiving module and the double-telecentric optical system and then are transmitted to a photosensitive surface corresponding to the array detector. The invention provides a diffraction light splitting and transceiving bistatic optical fiber matching technology, which solves the beam splitting requirement of high-efficiency 64 beams of laser through the DOE design of a diffraction optical device. Through the arrangement design of the optical fiber area array and the design of the telecentricoptical system, the strict matching technology of a transmitting view field and a receiving view field can be achieved, and large-view-field and high-density laser three-dimensional detection is completed.

Description

technical field [0001] The invention relates to the technical field, in particular to a multi-beam transceiving and dislocation optical system. Background technique [0002] LiDAR has a wide range of applications, involving many disciplines, and has broad application prospects both in military and civilian applications. In military aspects: Lidar can be used for guidance and navigation of cruise missiles, ranging systems, for low-flying target tracking measurements, for target flight attitude measurement, detection of chemical, biological warfare agents, and underwater positioning and communication. On the civilian side: Lidar can be used in atmospheric remote sensing and atmospheric measurement, measurement of atmospheric ozone, hazard forecasting in industrial production, surveying and mapping and geodesy, vehicle collision avoidance, robot vision, non-destructive testing and medical diagnosis and other fields. LiDAR technology has achieved remarkable research and applica...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the difficult problem of large field of view and high-density three-dimensional surveying and mapping, the present invention proposes the matching technology of diffractive light splitting and transceiving optical fibers, and solves the beam splitting requirements of 64 high-efficiency laser beams through the DOE design of diffractive optical devices to realize multi-beam The high-precision matching of the laser emitting field of view and the receiving field of view enables multi-beam high-resolution laser three-dimensional detection to obtain high-precision and accurate information; through the design of the optical fiber surface array and the design of the telecentric optical system, the emission can be realized Strict matching technology with the receiving field of view, taking into account the large field of view and high sampling density, reducing system power consumption and weight, and reducing system complexity

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