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Updated: Jul 22, 2026
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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
Published on: December 3, 2013
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Anti-crosstalk absolute phase retrieval method for microscopic fringe projection profilometry using temporal
Optics Express
|December 2, 2023
Summary
This study introduces an improved absolute phase retrieval method for microscopic fringe projection profilometry (MFPP). The new technique enhances accuracy and robustness by eliminating harmonic crosstalk in 3D shape measurement.
Area of Science:
- Optical Metrology
- 3D Shape Measurement
- Precision Engineering
Background:
- Microscopic fringe projection profilometry (MFPP) traditionally suffers from low accuracy and robustness.
- This is primarily due to harmonic crosstalk in composite frequency fringe methods used for absolute phase retrieval.
Purpose of the Study:
- To propose a novel absolute phase retrieval method for MFPP that effectively eliminates inter-channel crosstalk.
- To enhance the accuracy and robustness of 3D shape measurement in microscopic applications.
Main Methods:
- Introduced guard bands to accommodate frequency channels for the second harmonic.
- Eliminated aliasing between the second harmonic and fundamental frequencies.
- Employed phase-shifting algorithms for crosstalk-free phase map demodulation.
Main Results:
- Successfully eliminated harmonic crosstalk, a significant issue in traditional MFPP.
- Achieved accurate phase maps without inter-channel interference.
- Demonstrated effective 3D reconstruction for discontinuous planar and spherical surfaces.
Conclusions:
- The proposed anti-crosstalk method significantly improves absolute phase retrieval in MFPP.
- This technique is suitable for high-precision 3D shape measurement in fields like semiconductor manufacturing and MEMS inspection.
