Strain Determination On Curved Surfaces By Objective White Light Speckles

Tu Meirong; Li Minhua; Han Jinhu

doi:10.1117/12.941691

17 February 1987 Strain Determination On Curved Surfaces By Objective White Light Speckles

Tu Meirong, Li Minhua, Han Jinhu

Proceedings Volume 0814, Photomechanics and Speckle Metrology; (1987) https://doi.org/10.1117/12.941691
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

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.

Citation Download Citation

Tu Meirong, Li Minhua, and Han Jinhu "Strain Determination On Curved Surfaces By Objective White Light Speckles", Proc. SPIE 0814, Photomechanics and Speckle Metrology, (17 February 1987); https://doi.org/10.1117/12.941691

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