Unified approach for holography and shearography in surface deformation measurement and nondestructive testing

• Published in: Optical Engineering Vol. 42; no. 5; pp. 1197 - 1207
• Main Authors: Hung, Michael Y. Y, Shang, H. M, Yang, Lianxiang
• Format: Journal Article
• Language: English
• Published: 01.05.2003
• Subjects: nondestructive testing; optical measurement; shearing interferometry; shearography; strain measurement

Holography and shearography are two useful whole-field noncontacting optical tools for nondestructive flaw detection and precision measurements. Holography serves as a displacement transducer since it gives direct measurements on displacements whereas shearography serves as a strain gage since it gi...