A New Design of Rectangular Prisms Absorption Cell for Atmospheric Extinction Coeeficient Measurement

Journal of Atmospheric and Environmental Optics ›› 2017, Vol. 12 ›› Issue (2): 154-160.

A New Design of Rectangular Prisms Absorption Cell for Atmospheric Extinction Coeeficient Measurement

FAN Chuanyu1,2,3, XU Mengchun2,3, LU Xianyang2,4, XU Qingshan2*

(1． School of Material and Chemical Engineering, West Anhui University, Lu’an 237012, China;
2． Key Laboratory of Atmospheric Composition and Optical Radiation，Anhui Institute of Optics and Fine Mechanics，Chinese Academy of Sciences，Hefei 230031，China;
3． University of Chinese Academy of Sciences，Beijing 100039， China；
4. Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China )

Received:2015-03-02 Revised:2015-03-23 Online:2017-03-28 Published:2017-03-23

Abstract

Abstract:

A new type of oscillation cavity is developed based on the optical characteristics of the combination of two rectangular prisms. The oscillation cavity consists of four rectangular prisms. The length of basic line and the number of oscillations were changed by adjusting the distances and locations of four rectangular prisms. So the optical length of the cell increased. The light intensity can be measured by photoelectric conversion, so a ratio and the new equation of calculating atmospheric visibility can be obtained. Because of the divergence angle of of lasers, the diameter of the beam grows when the optical length increases. The situation is given by numerical simulation. The extinction coefficients corresponding with the different atmospheric visibilities are analyzed. The light intensities are calculated when the light pass the different optical lengths. This can provide reference for the selection of a detector.

Key words: rectangular prism, oscillation cavity, extinction coefficient

CLC Number:

P413

FAN Chuan-Yu, XU Meng-Chun, LU Xian-Xiang, XU Qing-Shan. A New Design of Rectangular Prisms Absorption Cell for Atmospheric Extinction Coeeficient Measurement[J]. Journal of Atmospheric and Environmental Optics, 2017, 12(2): 154-160.

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