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Lidar based on 2D DOE element and scanning method thereof

A technology of laser radar and scanning method, which is applied in the field of laser detection, and can solve problems such as high sensitivity, low cost, and high cost

Pending Publication Date: 2018-03-16
孙建锋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention adopts a single laser structure, which has the characteristics of low cost and high sensitivity, solves the problems of high cost and bloated structure caused by multiple lasers, and is very competitive in the future market promotion

Method used

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  • Lidar based on 2D DOE element and scanning method thereof
  • Lidar based on 2D DOE element and scanning method thereof
  • Lidar based on 2D DOE element and scanning method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment

[0038] Embodiment: based on the laser radar of two-dimensional DOE element, as attached figure 1 As shown, the lidar includes:

[0039] The lidar includes:

[0040] a laser emitting unit for emitting collimated pulsed light;

[0041] The two-dimensional DOE element is arranged at the emitting end of the laser emitting unit, and is used to modulate the wavefront phase of the collimated pulsed light emitted by the laser emitting unit, and divide the collimated pulsed light into M×N beams in the horizontal and vertical directions Area array lighting beams;

[0042] The laser echo signal receiving unit has a built-in area array signal detector, which is used to receive the reflected laser signal after the area array illumination beam irradiates the target;

[0043] The signal control unit is connected with the laser emitting unit and the laser echo signal receiving unit, and is used to control the laser emitting unit and the laser echo signal receiving unit;

[0044] The signa...

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Abstract

The invention discloses a lidar based on a 2D DOE element and a scanning method thereof. The lidar includes a laser emitting unit used for emitting collimated pulse light, a 2D DOE element arranged atthe emitting end of the laser emitting unit and used for modulating the wavefront phase of the collimated pulse light emitted by the laser emitting unit and dividing the collimated pulse light into M*N area array illumination beams in the horizontal and vertical directions, a laser echo signal receiving unit internally equipped with an area array signal detector and used for receiving laser signals reflected after the area array illumination beams irradiate a target, a signal control unit connected with the laser emitting unit and the laser echo signal receiving unit and used for controllingthe laser emitting unit and the laser echo signal receiving unit, and a signal processing unit connected with the laser echo signal receiving unit and used for receiving and processing the laser signals received by the laser echo signal receiving unit. The lidar adopts a single-laser structure, and has the characteristics of low cost and high sensitivity.

Description

technical field [0001] The invention relates to a laser radar and a scanning method thereof, in particular to a laser radar based on a two-dimensional DOE element and a scanning method thereof, and belongs to the technical field of laser detection. Background technique [0002] Lidar is the product of the combination of traditional radar and laser technology. Based on the principle of microwave radar, the laser beam is used as a new detection signal to give full play to the characteristics of high laser brightness, good directionality, monochromaticity and coherence, so that the laser radar has the characteristics of fast frequency, high peak power, Wide wavelength range, small size and other technical advantages. Combining the global positioning system (GPS) and the inertial navigation system (INS), the laser radar system can quickly and accurately obtain high-precision three-dimensional coordinate data of the measurement point, and establish digital line maps, digital ort...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/08G01S17/89G01S7/481
CPCG01S7/4817G01S17/08G01S17/89
Inventor 潘卫清孙建锋戴恩文职亚楠田克汉
Owner 孙建锋
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