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High-precision moisture Raman system and scaling method using monochromator

A monochromator, high-precision technology, applied in the field of atmospheric detection systems, can solve the problems of monochromator error, blurred spectral lines, difficult to distinguish, and unclear color definition of adjacent spectral lines, so as to increase accuracy and avoid errors Effect

Active Publication Date: 2013-08-21
MACAU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Traditional calibration methods often use line spectrum light sources with known wavelengths such as mercury lamps, hydrogen lamps, sodium lamps, neon lamps, and arc lamps to calibrate monochromators. This method has certain limitations. Difficult to distinguish, fuzzy, unclear color definition of adjacent spectral lines, etc. will affect the calibration results, and the judgment of the observer may also introduce large errors in the calibration of the monochromator

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  • High-precision moisture Raman system and scaling method using monochromator
  • High-precision moisture Raman system and scaling method using monochromator
  • High-precision moisture Raman system and scaling method using monochromator

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] Such as figure 1 As shown, the present invention uses a high-precision water vapor Raman system for spectroscopic analysis of a monochromator. The water vapor Raman system includes: a laser 1, a calibration sample unit 2, a laser radar unit 3, a conductive optical fiber 5, a monochromator 6, a signal Acquisition unit 80 and stepping motor 7 .

[0030] Wherein, the light beam output by the laser 1 can be switched between the calibration sample unit 2 and the laser radar unit 3, and the conductive optical fiber 5 is used for the first Raman optical signal generated by the calibration sample unit 2 or the laser radar The second Raman optical signal received by the unit 3 is transmitted to the monochromator 6, and the signal acquisition unit 80 is electrically connected to the monochromator 6 for detecting the first Raman optical signal or the second Raman optica...

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Abstract

The invention provides a high-precision moisture Raman system using monochromator. According to the invention, a scaling sample unit is added in an original moisture Raman system. Known Raman signal of the scaling sample unit is utilized as standard to carry out scaling for monochromator. A support which can move three-dimensionally also is added. Through the control of a computer and the movement of the three dimensional support detection key point changes freely between a laser radar unit and the scaling sample unit. Atmosphere detection is directly started after the completion of scaling by the monochromator. There is no need of other change of the original moisture Raman system. An error caused by the movement of moisture Raman system element is avoided and the accuracy of atmosphere detection is increased.

Description

【Technical field】 [0001] The invention relates to an atmospheric detection system, in particular to a water vapor Raman system and a calibration method using a monochromator for spectroscopy. 【Background technique】 [0002] The water vapor Raman lidar system can be used to obtain atmospheric parameters such as water vapor distribution contours in the troposphere, aerosol extinction coefficient, backscatter coefficient, and lidar ratio. As a multifunctional lidar, the echo signal energy is distributed in multiple wavelengths. How to separate and collect the echo signals of each wavelength is the key to water vapor Raman lidar technology. [0003] In the application of water vapor Raman lidar, a monochromator or a polychromator is often used as a spectroscopic element to separate the echo signals of different wavelengths, respectively collect the intensity signals at the wavelengths of interest for comparison and analysis, and obtain the required atmospheric information. For...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/95G01S7/497G01N21/65G01M11/02G01J3/12G01J3/44
CPCY02A90/10
Inventor 郑玉臣刘巧君冯瑞权谭建成朱建华罗时荣冼保生
Owner MACAU UNIV OF SCI & TECH