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Proceedings Paper

Strain Determination On Curved Surfaces By Objective White Light Speckles
Author(s): Tu Meirong; Li Minhua; Han Jinhu
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Paper Abstract

A close-range objective white light speckle method has been used for strain determination on simply curved surfaces. The speckle field is not the artificially printed random dots but only the radiance distribution of object surface which was slightly treated before the test to produce fine structure of optical details. The holographic film, instead of holographic plate, is attatched to the curved surface when illuminated by a flash light. Whole field fringe patterns are obtained with high sensitivities and large adjustable range. There is no longer a requirement to derive the speckle movement on the image plane from the object furface. Defocusing problem has been avoided. It can be practically applied to engineering problems with considerable convenience because of the very simple recording system and little demand for environmental stability.

Paper Details

Date Published: 17 February 1987
PDF: 7 pages
Proc. SPIE 0814, Photomechanics and Speckle Metrology, (17 February 1987); doi: 10.1117/12.941691
Show Author Affiliations
Tu Meirong, Chinese Academy of Sciences (China)
Li Minhua, Chinese Academy of Sciences (China)
Han Jinhu, Chinese Academy of Sciences (China)

Published in SPIE Proceedings Vol. 0814:
Photomechanics and Speckle Metrology
Fu-Pen Chiang, Editor(s)

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