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Proceedings Paper

Fringe Recognition Of The In-Plane Moire And Isochromatic Patterns
Author(s): J. Fang; H. M. Shi; X. J. Su
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Paper Abstract

An automatic procedure of ordering fringes of the in-plane moire and the isochromatic patterns is proposed. The rotational mismatch is used in moire test and a bending beam is superimposed on the photoelastic specimen to generate straight-line carriers before the deformation. The in-plane displacement and the relative retardation of birefringence are encoded respectively as the modulation to the carriers. The resultant fringes are digitally processed by autotracking, interpolation and demodulation to number the fringe-order and to realize a whole-field compensation automatically.

Paper Details

Date Published: 27 January 1989
PDF: 5 pages
Proc. SPIE 0965, Current Developments in Optical Engineering III, (27 January 1989); doi: 10.1117/12.948030
Show Author Affiliations
J. Fang, Peking University (China)
Tsinghua University (China)
H. M. Shi, Peking University (China)
Tsinghua University (China)
X. J. Su, Peking University (China)
Tsinghua University (China)

Published in SPIE Proceedings Vol. 0965:
Current Developments in Optical Engineering III
Robert E. Fischer; Warren J. Smith, Editor(s)

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