Abstract
The possibility of utilizing a honeycomb-like modulation pattern in a spatial light modulator (SLM) for multi-directional synchronous digital shearography measurements has been investigated. Each modulation pixel in the honeycomb-like pattern modulates the shearing amount in different directions, thus avoiding the resolution loss associated with previous methods where a single pixel could only modulate a specific shearing direction. It was demonstrated that high-quality phase maps for different shearing directions can be simultaneously obtained with a single exposure.
Funder
National Natural Science Foundation of China
Key Research and Development Program of Jiangxi Province