Atmospheric sounding laser radar CCD (charge coupled device) imaging automatic beam-focusing method

A technology of atmospheric detection and laser radar, which is applied in the direction of measurement devices, ICT adaptation, climate sustainability, etc., can solve the problems of long time consumption and low efficiency, and achieve the effect of high light efficiency

Active Publication Date: 2017-05-24
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

This method needs to scan and iterate in two directions, which is time-consuming and inefficient

Method used

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  • Atmospheric sounding laser radar CCD (charge coupled device) imaging automatic beam-focusing method
  • Atmospheric sounding laser radar CCD (charge coupled device) imaging automatic beam-focusing method
  • Atmospheric sounding laser radar CCD (charge coupled device) imaging automatic beam-focusing method

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Embodiment Construction

[0024] Below in conjunction with specific embodiment, further illustrate the present invention.

[0025] An automatic light alignment method for atmospheric detection laser radar CCD imaging, characterized in that the method comprises the following steps:

[0026] Step 1: First, the laser pulse is emitted by the laser (1), and then passes through the beam expander (2) to improve the divergence angle, and then guides the light to the emission adjustment mirror (4) through the reflection mirror (3), and the laser pulse finally passes through the emission adjustment mirror ( 4) launch into the atmosphere, the launch adjustment mirror (4) is installed on the two-dimensional adjustment frame (5), and the two-dimensional adjustment frame (5) is controlled by a stepping motor (6);

[0027] Step 2, the laser pulse emitted into the atmosphere interacts with the matter in the atmosphere, and the backscattered light in it is received by the receiving telescope (7), limits the receiving f...

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Abstract

The invention relates to an atmospheric sounding laser radar CCD (charge coupled device) imaging automatic beam-focusing method, which is characterized in that according to the method, a CCD camera is used for performing automatic beam focusing on laser radar backward scattering signal images. The method comprises the following steps that a laser radar emits a laser pulse into atmosphere through an emission regulating mirror; the laser pulse and substances in the atmosphere take mutual effects; the backward scattering light is received by a receiving telescope, becomes parallel light through a small-hole diaphragm and an eyepiece, and is then split into two parts through a spectroscope, wherein the transmission light enters the CCD camera for imaging the backward scattering light received by laser radar. A computer performs recognition and judgment on the formed image to obtain the two-dimensional orientation step length of the emission regulating mirror; the emission laser is regulated to the specified position in one step; the parallel state of the laser emission optical axis and the receiving telescope optical axis can be realized; the beam-focusing goal is achieved, so that the correctness of the obtained atmospheric echo signal is ensured; no iteration occurs in the process; the beam-focusing efficiency is high.

Description

technical field [0001] The invention relates to an automatic light alignment method for atmospheric detection laser radar CCD imaging. Background technique [0002] In the process of laser radar automatic alignment, the echo signal strength method is generally used. This method needs to set a reference height first, and this reference height is set in the full zone. When the laser emitting beam scans in one direction, the emitting beam will gradually enter the field of view from outside the field of view of the telescope. If the scanning continues, the beam will gradually move away from the optical axis of the telescope, and the echo signal above the reference height will gradually leave. field of view. At this time, the intensity of the echo signal collected by the receiving telescope will change continuously with the pointing angle of the transmitting beam, and the variation relationship is approximately a trapezoidal function. Take the position with the strongest inten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481G01S17/95
CPCG01S7/481G01S17/95Y02A90/10
Inventor 刘东肖玲王英俭王珍珠谢晨波王邦新钟志庆范爱媛
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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