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Better 3D inspection with structured illumination: signal formation and precision
Applied Optics
|September 15, 2015
Summary
Structured-illumination microscopy enhances 3D metrology precision and speed. This study models signal formation to optimize sensor parameters for demanding applications.
Area of Science:
- Optical Metrology
- Microscopy
- Surface Characterization
Background:
- 3D metrology requires higher precision and speed.
- Existing methods face limitations in space-bandwidth-speed product.
- Structured-illumination microscopy (SIM) offers potential for advancement.
Purpose of the Study:
- To develop a theoretical model for SIM signal formation.
- To investigate physical limits on precision in 3D metrology.
- To establish rules for optimizing sensor parameters for precision and speed.
Main Methods:
- Theoretical modeling of signal formation in SIM.
- Analysis of optically smooth and rough surfaces.
- Investigation of physical limits and sensor parameter optimization.
Main Results:
- A theoretical model for SIM signal formation was developed.
- Physical limits on 3D metrology precision were investigated.
- Rules for optimizing sensor parameters for precision and speed were established.
Conclusions:
- SIM is a viable technique for high-precision, high-speed 3D metrology.
- The developed model aids in sensor parameter optimization.
- This work provides a framework for advancing 3D metrology capabilities.
