On-vehicle multiple-beam optical phased array laser three-dimensional imaging radar system

Abstract

An on-vehicle multiple-beam optical phased array laser three-dimensional imaging radar system relates to the technical field of radar engineering and settles problems of short-distance object detection and low imaging frame frequency in an existing laser three-dimensional imaging system. The on-vehicle multiple-beam optical phased array laser three-dimensional imaging radar system comprises a multi-beam laser module, a transmitting module, a receiving module, a central processor and a distance measuring unit. The multi-beam laser module comprises a beam splitter, a phase modulator array, a fiber amplifier array and a collimating beam spreading array. The transmitting module comprises a unidirectional glass array and an optical phased array. The receiving module comprises an optical filterarray, a double-bonding-lens array, a surface array APD array, a quenching circuit and a distance measuring unit. A ground objective area is scanned through multiple laser beams, thereby obtaining corresponding point cloud data. The obtained data are processed, thereby realizing objective three-dimensional image reconstruction with advantages of high frame frequency, high resolution and large visual field. A detecting task to a ground object is finished in real time in high speed. The on-vehicle multiple-beam optical phased array laser three-dimensional imaging radar system has advantages of high measurement speed and high measurement precision.

Description

technical field [0001] The invention relates to the technical field of radar engineering, in particular to an airborne multi-beam optical phased array laser three-dimensional imaging radar system. Background technique [0002] As an active imaging technology, laser three-dimensional imaging radar technology is less affected by illumination conditions and target background contrast characteristics. It can obtain three-dimensional information of targets in low illumination and complex backgrounds, realize three-dimensional imaging, and can be used for reconnaissance and shooting range measurement in complex environments. , battlefield reconnaissance, military target recognition, fire control, underwater detection and other military fields, and can work for a long time, and can also be used for civil purposes such as terrain mapping, digital cities, etc. [0003] Traditional laser radars mostly use mechanical deflection, acousto-optic and electro-optic scanning methods for beam...

AI Technical Summary

Problems solved by technology

[0007] The present invention provides an airborne multi-beam optical phased array laser three-dimensional imaging radar system in order to solve the problems of the existing laser three-dimensional imaging system that can only detect short-distance targets and the imaging frame rate is low.

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