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Multi-wavelength ozone laser radar based on single photon CCD

A laser radar and single photon technology, applied in ICT adaptation, electromagnetic wave re-radiation, radio wave measurement system, etc., can solve problems such as complex devices, differences in detector response capabilities, system deviation of laser radar measurement results, etc., and achieve simplified composition , Increase the maximum measurement height and reduce the effect of background sunlight

Active Publication Date: 2018-11-30
山东国耀量子雷达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this combination of detectors not only further complicates the device, but also brings systematic bias to the lidar measurement results due to the difference in the response capabilities of each detector.

Method used

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  • Multi-wavelength ozone laser radar based on single photon CCD
  • Multi-wavelength ozone laser radar based on single photon CCD
  • Multi-wavelength ozone laser radar based on single photon CCD

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Embodiment

[0037] figure 1 A schematic structural diagram of a single-photon CCD-based multi-wavelength ozone laser radar provided for an embodiment of the present invention, including: a laser light source 1, a Raman tube 3, an optical transmitting module, an optical receiving module 7, a spectrometer 9, and a single-photon CCD10 , photon counter 11, main control module 12;

[0038] The laser light source 1 is used to output laser light, and the laser light includes laser light with a first wavelength; the first wavelength is located in an absorption band of ozone.

[0039] It should be noted that ozone has multiple absorption bands, and it can absorb ultraviolet light of 200-320nm. Currently, the commonly used method for measuring ozone uses a light source with a wavelength of 266nm. However, the present invention is not limited to laser light sources with a wavelength of 266nm. Other wavelengths, such as 290nm and 300nm are applicable to the present invention as long as they can meas...

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Abstract

The invention discloses a multi-wavelength ozone laser radar based on a single photon CCD. The multi-wavelength ozone laser radar based on the single photon CCD comprises an Nd-YAG quadruplicated frequency laser device, an optical lens, a Raman tube, a beam expander, a plane mirror, an optical receiving module, a beam split spectrograph, a detecting module, a data collecting and synchronous control unit. According to the multi-wavelength ozone laser radar based on the single photon CCD, multi-wavelength lasers are generated based on single Raman tube stimulated Raman, difference inversion is carried out on a return signal by using different wavelengths, high-precision measurement can be carried out on ozone concentration in a larger vertical height range, by using the Raman tube, the device is simplified, and differences of laser geometrical factors with different wavelengths are reduced, and measurement precision of the device is improved. In addition, by using the single photon CCD,not only the compositions of detecting parts are reduced, measurement errors caused by differences of a detector are reduced, so that the laser radar device has larger upgrade space, but also the maximum measurement height of the device is increased benefited by high sensitivity of the single photon detection.

Description

technical field [0001] The invention relates to the field of ozone differential absorption laser radar devices, in particular to a multi-wavelength ozone laser radar based on a single-photon CCD. Background technique [0002] Ozone is a key component of the atmosphere. About 90% of ozone exists in the stratosphere 10km to 50km from the surface. This part of ozone can absorb ultraviolet rays in sunlight, thereby protecting organisms on the earth from direct exposure to ultraviolet rays; the rest 10% of ozone exists in the troposphere closer to the surface. This part of ozone participates in photochemical reactions in the atmosphere and plays an important role in air pollution in the troposphere. In addition, excessive ozone levels can irritate and damage the eyes, respiratory system, etc. Mucous membrane tissue, which has a negative effect on human health. Therefore, it is of great significance to measure the temporal and spatial distribution of ozone. At present, remote sen...

Claims

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Application Information

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IPC IPC(8): G01S17/95G01S7/481
CPCG01S7/481G01S7/4818G01S17/95Y02A90/10
Inventor 陶雷刚夏海云
Owner 山东国耀量子雷达科技有限公司
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