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Adaptive projection moiré method for arbitrarily arranged light path system
Optics Letters
|May 13, 2022
Summary
This study introduces an adaptive moiré pattern generation method to improve 3D surface measurement precision. The new technique ensures uniform moiré fringe spacing, reducing errors in projection moiré systems.
Area of Science:
- Optical Metrology
- 3D Surface Reconstruction
- Computational Imaging
Background:
- Projection moiré systems typically produce non-uniform fringe spacing.
- This non-uniformity leads to increased low modulation regions and local measurement errors.
- Existing methods struggle with arbitrary surface geometries and phase jump errors.
Purpose of the Study:
- To develop an adaptive moiré pattern generation method for projection moiré systems.
- To improve full-field measurement precision by achieving uniform moiré patterns.
- To enable accurate 3D morphology acquisition on continuous surfaces without phase jump errors.
Main Methods:
- Formulating the relationship between surface contour and moiré fringe spacing.
- Modulating the period of the projected fringe adaptively.
- Developing a corresponding calculation algorithm for 3D morphology retrieval.
Main Results:
- Achieved a uniform moiré pattern, significantly improving measurement precision.
- Demonstrated applicability to arbitrarily arranged projection moiré systems.
- Successfully acquired 3D morphology on continuous surfaces without phase jump errors.
Conclusions:
- The adaptive moiré pattern generation method enhances projection moiré system accuracy.
- The developed technique offers a robust solution for 3D surface measurement on complex geometries.
- This method overcomes limitations of traditional projection moiré techniques, reducing measurement errors.
