| New Receiving Mode of Extinction for Determining Particle Size and Density without Convex Lens |
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| 作者姓名： | WU Weiliang CHEN Hanping |
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| 作者单位： | WU Weiliang CHEN Hanping (School of Power and Energy Engineering，Shanghai Jiao Tong University，Shanghai 200030，China |
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| 摘 要： | 1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｉｆａｌｉｇｈｔｂｅａｍ ｐａｓｓｅｓｔｈｒｏｕｇｈｔｈｅｐａｒｔｉｃｕｌａｔｅｔｒａｎｓｐａｒｅｎｔｍｅｄｉｕｍ ,ｉｔｓｉｎｔｅｎｓｉｔｙｗｉｌｌｂｅｗｅａｋｅｎｅｄｂｅｃａｕｓｅｏｆｔｈｅｅｘｔｉｎｃｔｉｏｎｏｆｐａｒｔｉｃｌｅｓ1] .Ｔｈｉｓｐｈｅｎｏｍｅｎｏｎｉｓｃａｕｓｅｄｂｙｔｈｅｓｃａｔｔｅｒｉｎｇａｎｄａｂｓｏｒｐｔｉｏｎｏｆ ｐａｒｔｉｃｌｅｓ.Ｔｈｅｓｃａｔｔｅｒｉｎｇｅｌｅｃｔｒｏｍａｇｎｅｔｉｃｗａｖｅｓａｒｅｄｉｆｆｕｓｅｄｉｎｓｐａｃｅａｌ…
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| 收稿时间： | 2001/2/21 |
New Receiving Mode of Extinction for Determining Particle Size and Density without Convex Lens |
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| WU Weiliang,CHEN Hanping.New Receiving Mode of Extinction for Determining Particle Size and Density without Convex Lens[J].中国激光(英文版),2002,11(1):45-50. |
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| Authors: | WU Weiliang CHEN Hanping |
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| Abstract: | In this article a new receiving mode for scattering light by particle is theoretically discussed. Using this receiving mode the convex lens can be omitted during determining the extinction of particle. Therefore the extinction coefficient of sphere particles is redefined by extrapolating the conventional one. In terms of the calculation results of light scattering the definition of near-field extinction coefficient of a swarm particle is depicted. Through the error analysis it is proved that the error coming from the new definition of extinction coefficient is acceptable for engineering application. In addition, a technique for determining the particle size and density is presented in this article and the advantage using this receiving mode is described. |
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| Keywords: | extinction of particle light scattering fluctuation method particle size particle density |
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