Hi Kavin,
To reconstruct a step-like object from interferometric data, follow these summarized steps:
- Use Fourier transform methods or phase-shifting algorithms to extract phase information from the fringe patterns.
- Apply phase unwrapping techniques, like quality-guided or path-following methods, to resolve phase values beyond the ([-π, π]) range.
- Convert phase information to actual height measurements by calibrating the system with known standards or through systematic calibration based on the optical setup and light wavelength.
- Convert the unwrapped, calibrated phase map into a height profile of the object, potentially using surface fitting to smooth out noise and errors.
- Use software like MATLAB to visualize the reconstructed surface and analyze the height profiles for validation.
Note:
- Reduce noise in your images before processing.
- Choose robust algorithms for phase unwrapping and reconstruction, especially for complex shapes.
- Validate your reconstructed profiles with known dimensions or alternative measurement techniques for accuracy.
This approach will help you reconstruct the height profile of a step-like object from your collected interferometric surface data.
