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The Fringe Reading Facility at the Max-Planck-Institut fuer Stroemungsforschung

Author
Meier, G. E. A.
Published
May 1, 1987.
Physical Description
1 electronic document
Additional Creators
Wenskus, R., Timm, R., Wegner, H., and Becker, F.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
A Mach-Zehnder interferometer is used for optical flow measurements in a transonic wind tunnel. Holographic interferograms are reconstructed by illumination with a He-Ne-laser and viewed by a video camera through wide angle optics. This setup was used for investigating industrial double exposure holograms of truck tires in order to develop methods of automatic recognition of certain manufacturing faults. Automatic input is achieved by a transient recorder digitizing the output of a TV camera and transferring the digitized data to a PDP11-34. Interest centered around sequences of interferograms showing the interaction of vortices with a profile and subsequent emission of sound generated by this process. The objective is the extraction of quantitative data which relates to the emission of noise.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19870020019.
Accession ID: 87N29452.
NASA. Ames Research Center, Automated Reduction of Data from Images and Holograms; p 433-436.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15697353