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Updated: Jan 22, 2026
11:34
High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
Published on: December 3, 2013
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High-accuracy 3D shape measurement of translucent objects by fringe projection profilometry
Optics Express
|June 30, 2019
Summary
This study introduces a novel 3D shape measurement method for translucent objects using phase-shifting fringe projection profilometry (FPP). The technique enhances accuracy by addressing subsurface scattering, reducing errors, and improving measurement completeness.
Area of Science:
- Optical Metrology
- 3D Imaging
- Materials Science
Background:
- Subsurface scattering in translucent objects complicates 3D shape measurement using fringe projection profilometry (FPP).
- Phase offset and degraded image contrast lead to geometric and random errors, resulting in incomplete measurements.
Purpose of the Study:
- To propose a high-accuracy 3D shape measurement method for translucent objects.
- To investigate and mitigate errors caused by subsurface scattering in FPP.
Main Methods:
- Developed a phase-shifting FPP method tailored for translucent materials.
- Investigated fringe period and phase error relationships to determine optimal fringe periods.
- Employed temporal noise reduction and multi-frequency heterodyne phase unwrapping with increased fringe period intervals.
- Compensated for geometric errors by establishing fringe period-depth offset relationships using multi-frequency fringe patterns.
Main Results:
- Successfully acquired complete 3D shape measurement results for translucent objects.
- Significantly reduced geometric and random errors inherent in FPP of translucent materials.
- Demonstrated improved robustness in phase unwrapping and noise reduction.
Conclusions:
- The proposed method effectively overcomes the challenges of measuring translucent objects with FPP.
- Achieved high accuracy and completeness in 3D shape measurements, offering a significant advancement in the field.
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