| 热风式大气湍流模拟装置的哈特曼测量 |
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| 引用本文： | 张慧敏,李新阳.热风式大气湍流模拟装置的哈特曼测量[J].光电工程,2004,31(Z1):4-7. |
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| 作者姓名： | 张慧敏 李新阳 |
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| 作者单位： | 1. 中国科学院光电技术研究所,四川,成都,610209;中国科学院研究生院,北京,100039
2. 中国科学院光电技术研究所,四川,成都,610209 |
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| 基金项目： | 国家 863 高技术课题项目 |
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| 摘 要： | 大气湍流是由于大气温度、压强的随机变化引起大气折射率随机改变而产生的。遵循这一原理,热风式湍流模拟装置对传输光束周围的空气加热,用风扇抽吸热空气产生湍流,通过改变加热温度和风扇的转速,模拟不同强弱的湍流。用哈特曼传感器对该装置进行测量并采集数据,通过波前斜率处理复原波前,在此基础上从时间域和空间域等方面分析所产生湍流的特点,并与理论进行比较。结果表明,该装置能产生基本符合大气湍流统计理论的湍流。
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| 关 键 词： | 大气湍流 哈特曼传感器 湍流模拟装置 波前测量 |
| 文章编号： | 1003-501X(2004)Sup-0004-04 |
| 收稿时间： | 2004/9/9 |
| 修稿时间： | 2004年9月9日 |
Measurement of a hot-wind laboratory atmospheric turbulence generator with Hartman wave-front sensor |
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| ZHANG Hui-min,LI Xin-yang.Measurement of a hot-wind laboratory atmospheric turbulence generator with Hartman wave-front sensor[J].Opto-Electronic Engineering,2004,31(Z1):4-7. |
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| Authors: | ZHANG Hui-min LI Xin-yang |
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| Abstract: | Atmospheric turbulence occurs with the variation of refraction index of atmosphere caused by random variation of atmospheric temperature and pressure. Based on this principle, the hot-wind turbulence generator heats the atmosphere around the beam, pumps the heated atmosphere by fans, then generates turbulence. One can simulate the turbulence in different grades by means of changing the heating temperature and the rotational speed of fans. By measuring the slope of wave-front with Hartman wave-front sensor and acquiring data from it, reconstructing the wave front, one can analyze the characteristics of turbulence both in temporal and space domains. The measurement results show that the generator can produce turbulence in accordance with the statistical atmospheric turbulence theoretically. |
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| Keywords: | Atmospheric turbulence Hartman sensor Laboratory turbulence generator Wave-front measurement |
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