Three-dimensional video laser radar system based on acousto-optic scanning

An acousto-optic scanning and lidar technology, applied in radio wave measurement systems, electromagnetic wave reradiation, instruments, etc., can solve the problems of large volume, high quality, slow imaging speed, etc., and achieve small volume, fast speed, and convenient operation Effect

Active Publication Date: 2013-12-25
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The problem to be solved by the present invention is to overcome the problems faced in the application of the above-mentioned three-dimensional imaging laser radar based on the traditional scanning method, overcome the disadvantages of the traditional three-dimensional imaging laser radar such as slow imaging speed, large volume, and h

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  • Three-dimensional video laser radar system based on acousto-optic scanning
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  • Three-dimensional video laser radar system based on acousto-optic scanning

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Embodiment Construction

[0024] The present invention takes three-dimensional video imaging of objects in a certain occasion as an example, adopts a fiber laser with a repetition frequency of 100KHz / 200KHz and a pulse width of 3ns as a light source, and adopts a two-dimensional acousto-optic scanning device to realize adjustable scanning range, scanning The resolution is adjustable to realize three-dimensional imaging of objects with different resolutions and different ranges. The present invention will be further described below in conjunction with specific embodiments and drawings, but the protection scope of the present invention should not be limited by this.

[0025] First please refer to figure 1 , figure 1It is a schematic diagram of the overall mechanism of the three-dimensional imaging laser radar based on two-dimensional acousto-optic scanning of the present invention: it can be seen from the figure that the three-dimensional video laser radar system based on acousto-optic scanning of the p...

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Abstract

A three-dimensional video laser radar system based on acousto-optic scanning comprises a laser, a laser emission module, a laser receiving module, a signal processing module, a master control circuit module and an upper computer processing program module. The three-dimensional video laser radar system based on acousto-optic scanning overcomes the defects that in a three-dimensional imaging laser radar application based on a traditional scanning method, the imaging speed is low and the size and mass are large, two-dimensional acousto-optic scanning devices are utilized to quickly and flexibly change scanning angles, the scanning angle range and angular resolution, three-dimensional video imaging is achieved, and demands of special occasions with a high imaging speed requirement can be met; meanwhile, the advantages of the small size, light weight, low power consumption and the like of the two-dimensional acousto-optic scanning device are made use of, so the size and weight of the system are greatly reduced.

Description

technical field [0001] The invention relates to a video laser radar, in particular to a three-dimensional video laser radar system based on acousto-optic scanning. Background technique [0002] With the continuous development of lidar technology and photoelectric detection technology, lidar is more and more widely used in the fields of remote sensing detection, imaging and ranging, among which imaging lidar has become the mainstream of development. 3D imaging lidar has the advantages of wide application range, long detection distance, convenient use, no contact and no damage, etc. At the same time, it also plays a key role in military, aerospace and other fields. At present, there are 3D imaging laser radars based on high-precision stepping motors to realize 2D scanning, which can realize 3D measurement with large range and high point density, but at the same time, there are disadvantages such as slow imaging speed, large volume, and high quality. A complete 3D image takes...

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Application Information

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IPC IPC(8): G01S17/89
Inventor 陈卫标罗远贺岩
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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