25 January 1990 Polarized Shearing-Moire Interferometry For Separated 3-D Strain Fringe Patterns
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Abstract
Utilizing laser's properties of both polarization and temporal coherence , a real time method of moire interferometry is proposed to obtain the separated 3-1) displacement derivative fringe patterns . For dual beams that contain identical polarization components , the optical-path difference is larger than the coherent length to eliminate the interaction between the wavefronts due to the shearing . For dual beams that include no identical components of polarization , the vibration planes are perpendicular to each other to fulfil the frame-separation of the in-plane derivative patterns. The out-of-plane displacement derivative patterns are achieved by the shearing of the zero-order diffractions of the grating.
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Jing Fang, Jing Fang, Fulong Dai, Fulong Dai, "Polarized Shearing-Moire Interferometry For Separated 3-D Strain Fringe Patterns", Proc. SPIE 1166, Polarization Considerations for Optical Systems II, (25 January 1990); doi: 10.1117/12.962891; https://doi.org/10.1117/12.962891
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