Pulsed Laser Shearography System for Defense Research and Education
Abstract
The University of Mississippi (UM) proposes to purchase a pulsed laser digital shearography system for research and research education involving vibration analysis. Pulsed digital shearography is a laser measuring technique based on digital data processing, shearing interferometry, and instantaneous phase-shifting technique. It enjoys all of the advantages of the conventional technique of shearography while incorporating real-time display and quantitative evaluation of measurement results. The technique is well-suited for vibration analysis as well as nondestructive testing (NDT) and strain measurement. Digital shearography is a coherentoptical measuring and testing method that is similar to holographic interferometry. However, shearography measures the gradient of a displacement, not the displacement itself as holography does. In addition, shearography has a “self-referencing” optical system, and, thus, the reference beam used in holography is not required. Pulsed shearography has the capability of high spatial resolution imaging of vibrations over a relatively large area in a very short time.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141512894
Entities
People
- Vyacheslav Aranchuk
Organizations
- Office of Naval Research
- United States Navy
- University of Mississippi