Büttner Lars, Leithold Christoph, Czarske Jürgen
Opt Express. 2013 Dec 16;21(25):30653-63. doi: 10.1364/OE.21.030653.
Optical transmission through fluctuating interfaces of mediums with different refractive indexes is limited by the occurring distortions. Temporal fluctuations of such distortions deteriorate optical measurements. In order to overcome this shortcoming we propose the use of adaptive optics. For the first time, an interferometric velocity measurement technique with embedded adaptive optics is presented for flow velocity measurements through a fluctuating air-water interface. A low order distortion correction technique using a fast deformable mirror and a Hartmann-Shack camera with high frame rate is employed. The obtained high control bandwidth enables precise measurements also at fast fluctuating media interfaces. This methodology paves the way for several kinds of optical flow measurements in various complex environments.
通过具有不同折射率的介质的波动界面的光传输受到所出现的畸变的限制。这种畸变的时间波动会使光学测量恶化。为了克服这一缺点，我们提出使用自适应光学。首次提出了一种用于通过波动的气-水界面进行流速测量的、嵌入了自适应光学的干涉测速技术。采用了一种使用快速可变形镜和高帧率哈特曼-夏克相机的低阶畸变校正技术。所获得的高控制带宽使得在快速波动的介质界面处也能够进行精确测量。这种方法为在各种复杂环境中的多种光学流速测量铺平了道路。
