Three-dimensional imaging laser radar system

Abstract

The present invention discloses a three-dimensional imaging laser radar system based on high-speed electro-optic modulation technology. The system mainly comprises a main control circuit module, a laser lighting module, a laser emitting optical system, a laser receiving optical system, a high-speed electro-optic modulation module, an EMCCD imaging module, and a host computer. Under the control of the main control circuit module, the high-speed electro-optic modulation module modulates the echo signal detected by the laser receiving optical system, one path is modulated as an optical signal whose light intensity is monotonically increased with time, and the other path is modulated as an optical signal whose light intensity is monotonically decreased with time. The two modulated optical signals are collected by two paths of EMCCD cameras with photon detection ability at the same time and then are transmitted to the host computer. The host computer processes two images and reconstructs the three-dimensional image of a target scene. The system has the advantages of high imaging speed and high resolution and is especially suitable for the three-dimensional detection imaging of a high dynamic target.

Description

technical field [0001] The invention relates to laser radar, in particular to a three-dimensional imaging laser radar based on electro-optic modulation. Background technique [0002] Laser three-dimensional imaging radar technology can obtain azimuth, elevation, distance, and intensity information at the same time, and has the advantages of high resolution, strong anti-interference ability, and good concealment performance. It can be used for distance measurement, angle measurement, angle tracking, and target speed measurement. And target activity instructions, tracking ultra-low-altitude flying targets, etc. These characteristics of laser three-dimensional imaging radar make it widely used in military and civilian fields such as terrain surveying and mapping, enemy reconnaissance, and target tracking. Three-dimensional imaging lidar technology can be divided into two types: coherent imaging and incoherent imaging in terms of imaging system. The range resolution of coherent...

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Problems solved by technology

[0004] In order to better overcome the problem of low lateral resolution of ICCD gain modulation, the present invention proposes a three-dimensional imaging lidar based on high-speed electro-optical modulation

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