| 光谱学与光谱分析 |
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| Particle Size and Number Density Online Analysis for Particle Suspension with Polarization-Differentiation Elastic Light Scattering Spectroscopy |
| CHEN Wei-kang1, FANG Hui2* |
1. Institute of Modern Optics, Nankai University, Key Laboratory of Optical Information Technical Science, Ministry of Education, Tianjin 300071, China
2. Institute of Micro-nano Optics, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China |
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Abstract The basic principle of polarization-differentiation elastic light scattering spectroscopy based techniques is that under the linear polarized light incidence, the singlely scattered light from the superficial biological tissue and diffusively scattered light from the deep tissue can be separated according to the difference of polarization characteristics. The novel point of the paper is to apply this method to the detection of particle suspension and, to realize the simultaneous measurement of its particle size and number density in its natural status. We design and build a coaxial cage optical system, and measure the backscatter signal at a specified angle from a polystyrene microsphere suspension. By controlling the polarization direction of incident light with a linear polarizer and adjusting the polarization direction of collected light with another linear polarizer, we obtain the parallel polarized elastic light scattering spectrum and cross polarized elastic light scattering spectrum. The difference between the two is the differential polarized elastic light scattering spectrum which include only the single scattering information of the particles. We thus compare this spectrum to the Mie scattering calculation and extract the particle size. We then also analyze the cross polarized elastic light scattering spectrum by applying the particle size already extracted. The analysis is based on the approximate expressions taking account of light diffusing, from which we are able to obtain the number density of the particle suspension. We compare our experimental outcomes with the manufacturer-provided values and further analyze the influence of the particle diameter standard deviation on the number density extraction, by which we finally verify the experimental method. The potential applications of the method include the on-line particle quality monitoring for particle manufacture as well as the fat and protein density detection of milk products.
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Received: 2014-11-13
Accepted: 2015-03-12
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Corresponding Authors:
FANG Hui
E-mail: fhui79@szu.edu.cn
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[1] ZHAO Kai-hua, ZHONG Xi-hua(赵凯华, 钟锡华). Optics(光学). Beijing: Peking University Press(北京：北京大学出版社)，1984. 58.
[2] Hulst H C, Van De Hulst H C. Light Scattering by Small Particles. Courier Dover Publications, 1957. 94.
[3] YUAN Yu-yan, BAI Hua-ping(袁玉燕, 白华萍). Ordnance Material Science and Engineering(兵器材料科学与工程), 2001, 24(5): 59.
[4] Li M, Wilkinson D. Chemical Engineering Science, 2001, 56(10): 3045.
[5] YANG Hui, ZHENG Gang, LI Meng-chao, et al(杨 晖, 郑 刚, 李孟超, 等). Acta Photonica Sinica(光子学报), 2009, 38(1): 179.
[6] Backman V, Gurjar R, Badizadegan K, et al. IEEE Journal of Selected Topics in Quantum Electronics, 1999，5：1019.
[7] Bartlett M, Huang G, Larcom L, et al. Applied Optics, 2004，43：1296.
[8] Bartlett M, Jiang H B. Physical Review E, 2002, 65.
[9] Yu C C, Lau C, Tunnell J W, et al. Optics Letters, 2006, 31: 3119.
[10] Demos S G, Radousky H B, Alfano R R. Optics Express, 2000, 7: 23.
[11] Qi J, Ye M L, Singh M, et al. Biomedical Optics Express, 2013, 4: 2433.
[12] Qiu L, Pleskow D K, Chuttani R, et al. Nature Medicine, 201, 16: 603.
[13] Crofcheck C L, Payne F A, Menguc M P. Applied Optics, 2002, 41: 2028.
[14] Gedzelman S D, Lopez-Alvarez M A, Hernandez-Andres J, et al. Applied Optics, 2008, 47: H128.
[15] YU Yang, CHEN Liang, PEI Xiao-guang, et al(于 洋, 陈 亮, 裴晓光，等). Instrument Technique and Sensor(仪表技术与传感器), 2010, (3): 89.
[16] Zonios G, Dimou A. Optics Express, 2006，14：8661.
[17] Zonios G, Perelman L T, Backman V, et al. Applied Optics, 1999，31：6628. |
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