Three-dimensional imaging optical radar system based on LED light source

Abstract

The invention provides a three-dimensional imaging optical radar system based on an LED light source. The three-dimensional imaging optical radar system based on the LED light source is used for lowering the cost of an existing 3D imaging optical radar system and comprises a high-power and high-speed LED light emitting assembly, a high-speed rotating modulation disk, a one-color CCD sensor, a three-unit optical imaging lens, a conversion imaging lens, an optical filter and a data processing module. The high-power and high-speed LED light emitting assembly conducts floodlighting on a target area in an imaging view field according to square wave drive, an echo light beam reflected by a target passes through the optical filter and then reaches the three-unit optical imaging lens, the light beam is imaged on the high-speed rotating modulation disk through the three-unit optical imaging lens, and then the light beam passes through the conversion imaging lens and is imaged on the one-color CCD sensor after being modulated. The output end of the one-color CCD sensor is connected with the data processing module. According to the three-dimensional imaging optical radar system based on the LED light source, through the reasonable 3D imaging mechanism, low-cost high-power and high-speed LEDs and the CCD sensor are adopted, so that the cost of the whole imaging radar is reduced, and imaging of a moving target is achieved.

Description

technical field [0001] The present invention relates to imaging light radar technology, mainly relates to the light radar technology using 2D sensor to realize 3D imaging, specifically a 3D imaging light radar system based on LED light source. Background technique [0002] Optical imaging radar (Lidar) basically uses laser as the emission light source, which is inseparable from the characteristics of laser. Imaging lidar can acquire 3D images of targets and has important application value. A variety of laser imaging radars with different uses have been developed by using various scanning mechanisms at home and abroad. In recent years, the research hotspot is non-scanning imaging, and it is mainly developing in two directions. One direction is to develop 3D sensors, and the other direction is to use 2D sensors to realize 3D imaging. The most representative of the former is the FLASH radar developed by Lincoln Laboratory. Its focus is to develop a FLASH device with a three-d...

AI Technical Summary

Problems solved by technology

In any case, due to the need for echo modulation (actually gain modulation), expensive ICCD devices are required. The former requires a laser with high power and high modulation rate, and the latter also uses a solid-state pulsed laser. These factors have directly led to the difficulty in reducing its cost

In addition, these schemes using 2D sensors to realize 3D imaging are basically still in the stage of theoretical and experimental research, and there is still a certain distance from engineering, and there are still many theoretical and technical problems to be solved

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