A new finding about the coupled fringes of off-plane displacement and slope in shadow moiré and its optical analysis

Hai Yun; Dazhen Yun

doi:10.1117/12.575051

10 February 2005 A new finding about the coupled fringes of off-plane displacement and slope in shadow moire and its optical analysis

Hai Yun, Dazhen Yun

Author Affiliations +

Proceedings Volume 5638, Optical Design and Testing II; (2005) https://doi.org/10.1117/12.575051
Event: Photonics Asia, 2004, Beijing, China

Abstract

The traditional concepts considered that only off-plane displacement can be obtained by the shadow moire method, but the slope moire fringes must be obtained from the specimen with mirror surface by the reflection moire method, etc. However, our recent experimental results reveal that the off-plane displacement fringe and the slope fringe appear together in a shadow moire pattern under experimental definitions. The basic principle and related experiment techniques are presented firstly in this paper. Two examples, a thin hyperboloidal shell and a thin cylindrical shell with local buckling, are given to demonstrate the actual coupled moire fringe patterns. Moreover, two distribution curves of δW/δx and W along asymmetry axis on the thin hyperboloidal shell are also calculated.

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Hai Yun and Dazhen Yun "A new finding about the coupled fringes of off-plane displacement and slope in shadow moire and its optical analysis", Proc. SPIE 5638, Optical Design and Testing II, (10 February 2005); https://doi.org/10.1117/12.575051

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