Interferometric velocity measurements through a fluctuating gas-liquid interface employing adaptive optics

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 f...

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Bibliographic Details
Published in:Optics express 2013-12, Vol.21 (25), p.30653-30663
Main Authors: Büttner, Lars, Leithold, Christoph, Czarske, Jürgen
Format: Article
Language:English
Subjects:
Computer Simulation
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Gases - chemistry
Interferometry - instrumentation
Lenses
Light
Models, Theoretical
Refractometry - instrumentation
Scattering, Radiation
Solutions - chemistry
Surface Plasmon Resonance - instrumentation
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Summary: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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.030653