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Laser radar based on diffraction optics and scanning method of laser radar

A laser radar, diffractive optics technology, applied in the field of laser detection, can solve the problems of high sensitivity, low cost, bloated structure, etc., to achieve the effect of parallel acquisition

Pending Publication Date: 2018-05-04
孙建锋
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  • Description
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  • 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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  • Laser radar based on diffraction optics and scanning method of laser radar
  • Laser radar based on diffraction optics and scanning method of laser radar
  • Laser radar based on diffraction optics and scanning method of laser radar

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Embodiment 1

[0043] Embodiment 1: laser radar based on diffractive optics, as attached figure 1 As shown, the lidar includes:

[0044] a laser emitting unit for emitting collimated pulsed light;

[0045] The diffractive optical element is arranged on the emission route of the laser emitting unit, and is used for modulating the wavefront phase of the collimated pulsed light emitted by the laser emitting unit, and dividing the collimated pulsed light into M beams of linear array illumination beams in the vertical direction;

[0046] The laser echo signal receiving unit is used to receive the reflected laser signal after the illumination beam irradiates the target; a high-sensitivity linear array signal detector with M pixels is arranged inside the laser echo signal receiving unit.

[0047] 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;

[004...

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Abstract

The invention discloses a laser radar based on diffraction optics and a scanning method of the laser radar. The laser radar based on diffraction optics comprises a laser transmitting unit, a diffraction optical element, a laser echo signal receiving unit, a signal control unit, a signal acquiring unit and an optical scanning unit. A single-laser structure is adopted. The laser radar based on diffraction optics has the characteristics of low cost and high sensitivity. The problem of high cost and swollen structure due to multiple lasers is solved, and the laser radar based on diffraction opticshas quite high market competitiveness in future market promotion.

Description

technical field [0001] The invention relates to a laser radar and a scanning method thereof, in particular to a laser radar based on diffraction optics and a scanning method thereof, and belongs to the technical field of laser detection. Background technique [0002] With its high detection accuracy, fast detection speed, and strong anti-interference ability, lidar has quickly become a research hotspot in the fields of surveying, mapping, modeling and autonomous driving. According to different platforms, lidar can be divided into airborne lidar system, vehicle lidar system and ground lidar system. Airborne lidar systems are mainly used for large-scale digital city measurement and modeling, while ground-based lidar systems can obtain higher-precision geometric data, and are usually used for reconstruction of cultural monuments and reverse engineering of target products. In contrast, the development of vehicle-mounted lidar systems is relatively slow, but as autonomous drivin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/02
CPCG01S17/02
Inventor 潘卫清孙建锋戴恩文职亚楠田克汉
Owner 孙建锋
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