Oblique-Optical-Axis Speckle Photography Used For Measuring 3-D Displacements Of Practical Engineering Structures

He Yuming; Tan Yushan; Ku Chungshien

doi:10.1117/12.939090

15 January 1988 Oblique-Optical-Axis Speckle Photography Used For Measuring 3-D Displacements Of Practical Engineering Structures

He Yuming, Tan Yushan, Ku Chungshien

Author Affiliations +

Proceedings Volume 0673, Holography Applications; (1988) https://doi.org/10.1117/12.939090
Event: Holography Applications, 1986, Beijing, China

Abstract

In this paper a new technique for measuring 3-D displacements using oblique-optical-axis speckle photography (OSP) is introduced. The accuracy of seperating the out-of-plane displacement can be improved, and the visual field of the photographic lens can be utilized sufficiently when the OSP method is used. The experimental results of 3-D deformation of both the sample and the machine tool head stock are exemplified. Moreover, the Apple II microcomputer image processing system for fully auto-analysing the Young's fringe patterns is described principally. Lastly, by comparing the theoretical results with the experimental results, the OSP method and the image auto-processing system are satisfactory.

Citation Download Citation

He Yuming, Tan Yushan, and Ku Chungshien "Oblique-Optical-Axis Speckle Photography Used For Measuring 3-D Displacements Of Practical Engineering Structures", Proc. SPIE 0673, Holography Applications, (15 January 1988); https://doi.org/10.1117/12.939090

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