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激光尘埃粒子计数器微型光学传感器的研究

Study of Miniature Optical Sensor for Laser Particle Counter

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摘要

研制成功便携式激光尘埃粒子计数器的核心部件——微型光学传感器。该传感器采用直角散射光收集形式,以高功率半导体激光器作为光源,同时采用高性能的PIN型光电二极管作为光电探测器。散射光收集系统为单一大数值孔径的球面反射镜,其对粒子散射光的收集角范围从20°到160°。粒子散射光信号是脉冲信号,其频谱成份主要在高频段,所以在PIN型光电二极管后用一个带通式前置放大器来消除外界的低频噪声,根据米氏散射理论计算了该光学传感器的光散射响应特性,并用聚苯乙烯标准粒子实测了该光学传感器的性能。结果表明,该系统具有高的信噪比、计数效率和尺寸分辨本领。

Abstract

A miniature optical sensor, the core of a miniature laser aerosol particle counter, has been developed. The optical system of the sensor is a right-angle scattering optics. A high-power laser diode module is used as the light source, and a PIN photodiode with high performance is used as the photo-detector. By using a reflective spherical mirror with large numerical aperture, the light scattered by individual particles is collected over a large angular range of 20° to 160°. The scattered light signal from the particle is short pulse, which consists mainly of high frequency components. A band-pass preamplifier is used to eliminate lower-frequency eletromagnetic interference from external environment. The light scattering response characteristics of the sensor are calculated based on Mie scattering theory. The sensor performance has been tested with standard par5ticles of polystyrene latex, the results show that the sensor has high signal-to-noise ratio, counting efficiency, and size resolution.

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中图分类号:TH741

所属栏目:光学器件

收稿日期:2004-09-28

修改稿日期:2004-12-15

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作者单位    点击查看

梁春雷:中国科学院上海光学精密机械研究所,上海 201800武汉化工学院理学院,武汉 430073
黄惠杰:中国科学院上海光学精密机械研究所,上海 201800
任冰强:中国科学院上海光学精密机械研究所,上海 201800
赵永凯:中国科学院上海光学精密机械研究所,上海 201800
杜龙龙:中国科学院上海光学精密机械研究所,上海 201800

联系人作者:梁春雷(chunlei1@mail.siom.ac.cn)

备注:梁春雷(1976~),男,辽宁义县人,中国科学院上海光学精密机械研究所硕士研究生,主要从事光学检测和光学测量的研究。

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引用该论文

梁春雷,黄惠杰,任冰强,赵永凯,杜龙龙. Study of Miniature Optical Sensor for Laser Particle Counter[J]. Acta Optica Sinica, 2005, 25(9): 1260-1264

梁春雷,黄惠杰,任冰强,赵永凯,杜龙龙. 激光尘埃粒子计数器微型光学传感器的研究[J]. 光学学报, 2005, 25(9): 1260-1264

被引情况

【1】顾芳,杨娟,卞保民,贺安之. 基于平均质量的悬浮颗粒物的质量密度算法. 光学学报, 2007, 27(9): 1706-1710

【2】贾哲新,巩轲,何淑芳,霍玉晶. 基于激光散射的高速微粒测速系统. 中国激光, 2008, 35(7): 1050-1054

【3】彭刚,赖小明,闫振纲,王春勇,卞保民,陆建. 颗粒群光散射脉冲信号统计参数分形特征. 光学学报, 2010, 30(6): 1693-1696

【4】冯春霞,黄立华,周光超,韩杰,曾爱军,赵永凯,黄惠杰. 单分散生物气溶胶光散射特性的计算与分析. 中国激光, 2010, 37(10): 2592-2598

【5】卜令兵,王敏,黄兴友,朱亚宗,李慧龙. 云粒子探测器及其标定研究. 中国激光, 2011, 38(8): 808005--1

【6】蔡舒窈,张佩,朱玲琳,谢承科,孙征宇,程伟林,赵永凯,黄惠杰. 基于色氨酸本征荧光测量的生物气溶胶检测技术研究. 光学学报, 2012, 32(5): 512009--1

【7】鲁晨阳,张佩,王光辉,朱菁,黄惠杰. 鞘流技术在气溶胶颗粒物光学传感器上的应用研究. 中国激光, 2019, 46(1): 104006--1

【8】王文誉,刘建国,赵欣,张礁石,余同柱,桂华侨,杨义新. 小流量高浓度颗粒物光学计数及重叠校正方法研究. 光学学报, 2020, 40(6): 629001--1

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