摘要当一束平面波光束通过一个扰动的折射率变化的流场后,使得波面发生相差;这些相差对于利用这些光束的光学系统的性能有很大的影响。对于这些相差(当致相差流场是光学系统近场的相对短的传播长度)的研究就是所谓的气动光学。本文一开始对传统的气动光学定量法进行简单的介绍。然后回顾了在过去10多年里高速波面传感器的发展对于流体动力学以及光学领域的影响。特别的,人们更好地理解了导致光学相差的流体动力学原理,并且成功的发展了缩放法则。最后对于今后气动光学研究的趋势方向做了简单的总结和描述。63715
毕业论文关键词 扰动 相差 气动光学 流体动力学
毕业设计说明书(论文)外文摘要
Title Influence of flowfield on the propagation properties of the beams
Abstract
The passage of a planar-wavefront optical beamthrough a turbulent, index-of-refraction-variant flowfield imprints dynamically changing aberrations on the wavefront;these aberrations have detrimental effects on the performance of optical systems making use of the beam.The study of these aberrations (when the aberrating flowfield is of relatively short propagation length in the near field of the optical system) is referred to as aero-optics.This article begins with a brief discussion of the traditional approach to quantifying aero-optic interactions.It then reviews how the development of high-speed wavefront sensors over the past 10 years has impacted the fluid-dynamics and optics fields.In particular,the fluid-dynamic mechanisms creating optical distortions are now better understood,and successful aero-optic scaling laws have been developed.The article concludes with a description of future trends in aero-optical research
Keywords turbulent aberration aero-optic fluid-dynamic
1 绪论 1
1.1 气动光学的梗概 1
1.2 研究气动光学的目的 2
1.3 远场光学传播的波长依赖性 3
2 流体光学相互作用问题的解决 4
3 气动光学统计法 5
4 对 的动力学测量的设备 8
4.1 Hartmann传感器原理 8
4.2 Malley等人的研究 10
4.3 Neal等人的研究 11
4.4 小孔径光束技术传感器 12
5 动力学方面的成果 15
5.1 联结方程 15
5.2流场显示和湍流结构 15
5.3 恒流测定 18
5.4 湍流的低阶描述 20
5.5 由动力学波面的流场再现 21
6 高速气动光学 25
6.1 AEDC气动光学数据 26
6.2 压缩机制 28
6.3 缩放法则 36
6.4 二重折射率不可压缩混合模型 38
结 论