3D imaging lidar system based on led light source

Abstract

The invention provides a 3D imaging light radar system based on an LED light source, which is used to reduce the cost of the existing 3D imaging light radar system. The imaging lidar system includes a high-power high-speed LED light emitting component, a high-speed rotating reticle, the first and second optical imaging lenses, three sets of imaging components, optical filters, spectroscopic sheets and data processing modules; the echo reflected by the target After passing through the filter, the light beam reaches the first optical imaging lens and is imaged on the high-speed rotating modulation disc. The modulated light wave is incident on the second optical imaging lens. The output light from the second optical imaging lens passes through the beam splitter and enters the three Composing imaging components, each group of imaging components includes an optical imaging lens and a monochrome CCD sensor, the light reaches the monochrome CCD sensor after passing through the optical imaging lens, and the output end of the monochrome CCD sensor is connected to the data processing module. Through a reasonable 3D imaging mechanism, the present invention adopts low-cost, high-power, high-speed LEDs and CCD sensors, thereby greatly reducing costs.

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. Scanless imaging is a research hotspot in recent years, 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-dimensional imaging function. This device is a two-dimensional pixel array device, and each pixel has an independent ranging function. The F...

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 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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