| 基于周期激励流场的气动光学效应自适应校正 |
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| 引用本文： | 谢文科,姜宗福. 基于周期激励流场的气动光学效应自适应校正[J]. 红外与激光工程, 2007, 36(2): 270-273 |
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| 作者姓名： | 谢文科 姜宗福 |
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| 作者单位： | 国防科学技术大学,光电科学与工程学院,湖南,长沙,410073 |
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| 摘 要： | 通过外加周期激励对气动光学流场中相干结构的发展进行相位调制，从而获得近似周期变化的畸变波前时间序列；通过计算各相位角畸变波前的平均值，并将其共轭波前作为相应时刻的校正信号应用于畸变波前的自适应校正。对比校正前后的近场相位分布以及远场Strehl比发现：该气动光学校正方案能有效地消除相干结构产生的大尺度波前相位畸变，同时提高远场的Strehl比。
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| 关 键 词： | 气动光学 相干结构 相位锁定 自适应校正 Strehl比 |
| 文章编号： | 1007-2276(2007)02-0270-04 |
| 收稿时间： | 2006-04-15 |
| 修稿时间： | 2006-04-15 |
Aero-optics adaptive correction scheme based onperiodical excited flowfield |
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| XIE Wen-ke,JIANG Zong-fu. Aero-optics adaptive correction scheme based onperiodical excited flowfield[J]. Infrared and Laser Engineering, 2007, 36(2): 270-273 |
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| Authors: | XIE Wen-ke JIANG Zong-fu |
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| Affiliation: | College of Optoelectronic Science and Engineering, National University of the Defense Technology, Changsha 410073, China |
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| Abstract: | Based on the external periodical excited aero-optical flowfield, the quasi-periodical aberration wavefront time series are obtained. By computing the time-averaged wavefront , the adaptive conjugate correction wavefronts are achieved. Then the conjugate wavefronts are applied to correct the corresponding aberration wavefronts. Comparison of the near-field wavefronts and the far-field strehl ratios with and without the correction indicates: the aero-optical correction scheme can eliminate the aero-optical effects induced by coherent structures and improve the far-field strehl ratios. |
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| Keywords: | Aero-optics Coherent structure Phase locked Adaptive correction Strehl ratio |
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