Laser emission device, laser radar detection device and method
A laser emission and laser technology, which is applied to measurement devices, re-radiation, and re-radiation of electromagnetic waves, etc., can solve the problems of insufficient 3D images, large volume, and high cost of lidar, and achieve compact cost, fine scanning, and simple structure. Effect
Active Publication Date: 2021-03-02
TSINGHUA UNIV
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[0006] The present invention provides a laser emitting device, a laser radar detection device and a method for overcoming the problems of high cost and large size of the laser radar in the prior art and the obtained three-dimensional image of the target object is not fine enough
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[0026] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0027] Laser detection technology is mainly used in three-dimensional measurement, which can directly obtain the three-dimensional space information of the target object, and then realize the three-dimensional reconstruction of the target object. As an extremely important part of the laser detection technology, the laser emitting device has a decisive influence on the three-dimensional measurement of the target object. In order to improve the scanning efficiency of the target object, multiple lasers are usually used in the prior art to emit multiple laser beams at different angles to irradiate the target object, but this method requires the use of multiple lasers, which gr...
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The present invention provides a laser emitting device, a laser radar detection device and a method. The laser emitting device includes: a transmitting optical system, a phase pre-controller, and a two-dimensional Daman grating beam splitter; Collimated beam expansion; phase pre-controller, used to pre-adjust the phase of the laser beam after collimation and beam expansion; two-dimensional Damman grating beam splitter, used to split the laser beam after phase pre-adjusted, to Obtain a two-dimensional array of laser beams. In the laser emission device, laser radar detection device and method provided by the present invention, the phase pre-controller is arranged between the emission optical system and the two-dimensional Damman grating beam splitter, so that the two-dimensionally arranged laser beam array is irradiated on the target The projection on the object produces tiny movements to achieve a more comprehensive and detailed scan of the target object. Moreover, the laser emitting device and the laser radar detecting device have the advantages of simple structure, compactness and low cost.
Description
technical field [0001] The present invention relates to the technical field of laser radar, and more specifically, to a laser emitting device, a laser radar detection device and a method. Background technique [0002] Laser detection technology is mainly used in three-dimensional measurement, which can directly obtain the three-dimensional space information of the target object, and then realize the three-dimensional reconstruction of the target object. Laser detection technology can be used in many fields of the national economy in the range of several meters to thousands of meters, and the measurement accuracy is on the order of several millimeters to decimeters. As an extremely important part of the laser detection technology, the laser emitting device has a decisive influence on the three-dimensional measurement of the target object. [0003] As a specific application of laser detection technology, LIDAR (LIDAR, Light Detection And Ranging) can use a laser emitting devi...
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IPC IPC(8): G01S17/894G01S7/484
CPCG01S7/484G01S17/89
Inventor 郝智彪刘雅琦汪莱熊兵孙长征王健李洪涛韩彦军罗毅
Owner TSINGHUA UNIV