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首页> 外文期刊>Optical engineering >Interferometric velocity measurements through a fluctuating interface using a Fresnel guide star-based wavefront correction system
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Interferometric velocity measurements through a fluctuating interface using a Fresnel guide star-based wavefront correction system

机译：使用基于菲涅耳指南星的波前校正系统通过波动界面进行干涉速度测量

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摘要

To improve optical measurements, which are degraded by optical distortions, wavefront correction systems can be used. Generally, these systems evaluate a guide star in transmission. The guide star emits well-known wavefronts, which sample the distortion by propagating through it. The system is able to directly measure the distortion and correct it. There are setups, where it is not possible to generate a guide star behind the distortion. Here, we consider a liquid jet with a radially open surface. A Mach-Zehnder interferometer is presented where both beams are stabilized through a fluctuating liquid jet surface with the Fresnel guide star (FGS) technique. The wavefront correction system estimates the beam path behind the surface by evaluating the incident beam angle and reflected beam angle of the Fresnel reflex with an observer to control the incident angle for the desired beam path. With this approach, only one optical access through the phase boundary is needed for the measurement, which can be traversed over a range of 250 μm with a significantly increased rate of valid signals. The experiment demonstrates the potential of the FGS technique for measurements through fluctuating phase boundaries, such as film flows or jets.
机译：为了改善由于光学畸变而降低的光学测量，可以使用波前校正系统。通常，这些系统评估传输中的引导星。引导星发出众所周知的波阵面，这些波阵面通过传播来采样失真。该系统能够直接测量失真并进行校正。在某些设置中，无法在失真后面生成引导星。在这里，我们考虑具有径向开放表面的液体射流。提出了一种Mach-Zehnder干涉仪，其中两个光束通过菲涅耳导星（FGS）技术通过波动的液体喷射表面而稳定。波前校正系统通过与观察者一起评估菲涅耳反射镜的入射光束角和反射光束角来估计表面后方的光束路径，从而控制所需光束路径的入射角。通过这种方法，仅需要通过相位边界的一个光学通道即可进行测量，该通道可以在250μm的范围内遍历，有效信号的速率大大提高。实验证明了FGS技术通过变化的相界（例如薄膜流或喷流）进行测量的潜力。

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  • 来源
    《Optical engineering》 |2018年第8期|084104.1-084104.7|共7页
  • 作者

    Hannes Radner; Lars Buettner; Juergen Czarske;

  • 作者单位

    Technische Universitaet Dresden, Laboratory for Measurement and Sensor System Techniques, Faculty of Electrical and Computer Engineering, Dresden, Germany;

    Technische Universitaet Dresden, Laboratory for Measurement and Sensor System Techniques, Faculty of Electrical and Computer Engineering, Dresden, Germany;

    Technische Universitaet Dresden, Laboratory for Measurement and Sensor System Techniques, Faculty of Electrical and Computer Engineering, Dresden, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    laser Doppler velocimetry; adaptive optics; wavefront compensation; Fresnel guide star;

    机译：激光多普勒测速仪自适应光学波前补偿菲涅耳指南星;

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