| 长波通滤波器的研究 |
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| 引用本文： | 田世忠,吴根兴.长波通滤波器的研究[J].实验流体力学,1996(1). |
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| 作者姓名： | 田世忠 吴根兴 |
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| 作者单位： | 南京航空航天大学 |
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| 基金项目： | 航空科学基金，“八五”攻关项目 |
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| 摘 要： | 用激光照射掺有碘分子的流场，感应的碘分子荧光包含着流动参数如速度、压强、温度和密度的信息，可用其来对这些参数进行测量。但荧光信号通常很弱，在没有合适滤波器的情况下，测量的信噪比是差的。为了去掉作为噪音的散射的激光和背景光，设计和制造了长波通滤波器，它们具有高质量性能，相应的测量有好的信噪比。
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| 关 键 词： | 激光荧光 滤波器 信噪比 激光 背景光 |
RESEARCHES ON LONG PASS FILTER |
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| Tian Shizhong,Wu Cenxing.RESEARCHES ON LONG PASS FILTER[J].Experiments and Measur in Fluid Mechanics,1996(1). |
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| Authors: | Tian Shizhong Wu Cenxing |
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| Abstract: | Flow fields seeded with iodine molecule are irradiated by laser,the induced fluorescence of iodine molecule involving information of flow parameters:Velocity,pressure,temperature and density,can be used to measure these parameters,The signal of fluorescence is relatively weaker,without an appropriate filter the measurements are of bad ratio of signal to noise.In order to block scattered laser light and the light of background as noise,the long pass filter had b3en designed and developed,being of high quality.Therefore the corresponding measurements would be of good ratio of signal to noise. |
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| Keywords: | laser fluorescence filter signal to noise ratio laser light of background |
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