High-speed generation of digital holographic interferograms and shearograms for non-destructive testing
Abstract:Digital holographic interferometry is the state-of-the-art technique in holography having applications in the fields of non-destructive testing, flow analysis and vibration measurement covering a wide range from huge aerospace structures to micro objects such as MEMS[
In holographic non-destructive testing (HNDT), transient thermal loading is an extensively used method of stressing the objects for defect detection[
In this paper the development of a digital hologram processing system which can record a digital hologram in high speed and generate holographic interferograms and shearograms simultaneously is reported. The design of the high-speed image processing system and selection of digital camera is also explained. The paper also gives details of the software developed and its features. The need for the high-speed system to record and generate interferograms during NDT of highly porous materials is also demonstrated in this paper.
Document Type: Research Article
Affiliations: 1 Experimental Mechanics Division, Vikram Sarabhai Space Centre, Thiruvananthapuram 695 022, Kerala, India. binu_thomasvssc.gov.in, Tel: 91 (0)471 2565245
Publication date: 2009-05-01
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- Official Journal of The British Institute of Non-Destructive Testing - includes original research and devlopment papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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