Digital Shearography: Theory and Application of Digital Speckle Pattern Shearing Interferometry

The ever-increasing requirements of product quality and reliability demand more efficient measuring and testing methods. Developed in the past decade, shearography--also called speckle pattern shearing interferometry--is a coherent-optical measuring and testing method, similar to holographic interferometry. This book describes the development of second-generation digital shearography, which is especially effective in nondestructive testing, strain measurement, and vibration analysis due to its relative insensitivity to environmental disturbances.

Contents

- Introduction and approach to problem

- Shearographic metrology

- Simple digital shearography

- Phase-shifting shearography

- Evaluation of the interferogram

- Nondestructive testing of materials

- Strain measurement

- Vibration analysis using continuous wave lasers

- Digital shearography for quantifying heat flow rate

- Analysis of deviations

- Assessment of digital speckle pattern shearing interferometry