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Modulation transfer function assessment for sampled imaging systems: effect of intensity variations in periodic
Applied Optics
|February 12, 2008
Summary
This study presents an analytical model to estimate errors in modulation transfer function (MTF) assessments for sampled imaging systems. It addresses challenges with intensity balance in periodic targets, crucial for accurate imaging system analysis.
Area of Science:
- Optical Engineering
- Image Quality Assessment
- Metrology
Background:
- Accurate assessment of imaging system performance is critical.
- Modulation Transfer Function (MTF) is a key metric for image quality.
- Existing MTF assessment methods using periodic targets face implementation challenges.
Purpose of the Study:
- To develop an analytical model for estimating errors in MTF assessment.
- To quantify the impact of intensity imbalance in periodic targets on MTF accuracy.
- To evaluate the experimental process errors in MTF determination.
Main Methods:
- Development of an analytical model to predict MTF assessment error.
- Simulation and analysis of intensity variations in periodic targets.
- Estimation of experimental process-related errors.
Main Results:
- The analytical model provides a first estimation of the importance of intensity balance problems.
- Quantified potential errors in MTF assessment due to experimental factors.
- Demonstrated the impact of these errors on two generic camera systems.
Conclusions:
- Intensity balance is a critical factor in accurate MTF assessment.
- The proposed model aids in understanding and mitigating experimental errors in MTF measurements.
- This work contributes to more reliable characterization of sampled imaging systems.
