Evaluation of a diffusing mask as speckle generator in digital shearography

Authors

Victor Angelo C. Gonzalez ⋅ PH National Institute of Physics, University of the Philippines Diliman
Francesca Celine I. Catalan ⋅ PH National Institute of Physics, University of the Philippines Diliman
Raphael D. Santos ⋅ PH National Institute of Physics, University of the Philippines Diliman
Percival F. Almoro ⋅ PH National Institute of Physics, University of the Philippines Diliman and DTU Fotonik, Danmarks Tekniske Universitet, Roskilde, Denmark

Abstract

Digital Shearography (DS) is an optical method for measuring strains in rough opaque objects by using speckle patterns as information carriers of the sample. Recent studies have shown that inducing surface roughness by scratching a smooth surface extends the application of DS in transparent objects. However, this entails physically modifying the sample. Here, we demonstrate the use of a developed mask as a speckle generator in the testing of transparent objects without compromising the resolution. The mask is fabricated by chemical etching. The proposed technique can be used in the investigations of photo-elastic strains in transparent materials.

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Issue

2009: Proceedings of the 27th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2009-PA-12

Section

Poster Session PA

Published

2009-10-28

How to Cite

[1]

VAC Gonzalez, FCI Catalan, RD Santos, and PF Almoro, Evaluation of a diffusing mask as speckle generator in digital shearography, Proceedings of the Samahang Pisika ng Pilipinas 27, SPP-2009-PA-12 (2009). URL: https://proceedings.spp-online.org/article/view/SPP-2009-PA-12.