Simulation of modulation transfer function using a rendering method

Area of Science:

• Optics and Photonics
• Computational Imaging
• Computer Graphics

Background:

• Evaluating the modulation transfer function (MTF) of optical imaging systems is crucial for understanding their resolving power.
• Conventional methods, often relying on the point spread function (PSF), struggle with shift-variant systems and analyzing stray light effects.
• Existing simulation techniques, like Monte Carlo methods, can be computationally intensive and less precise.

Purpose of the Study:

• To propose and validate a novel simulation method for evaluating the MTF of optical imaging systems.
• To develop a simulation approach that accurately models experimental MTF measurements using resolution test charts.
• To enable the analysis of shift-variant optical systems and the impact of stray light on imaging performance.

Main Methods:

• A new simulation method based on rendering techniques, akin to those used in 3D computer graphics (3D CG), is proposed.
• The method simulates the intensity distribution on an image surface, directly correlating with experimental MTF measurements.
• It allows for the analysis of optical systems that are difficult to evaluate using traditional PSF-based approaches.

Main Results:

• The rendering-based simulation method provides a faster and more precise alternative to conventional simulation techniques.
• It accurately evaluates the MTF, offering insights into the resolving power of complex, shift-variant optical systems.
• The method effectively quantifies the impact of stray light phenomena (reflection, scattering) on overall imaging performance.

Conclusions:

• The proposed rendering-based simulation method is highly effective for analyzing the MTF of optical imaging systems.
• This approach offers significant advantages in speed and precision over traditional methods, particularly for challenging system types.
• It provides a powerful tool for optical system design, analysis, and performance evaluation.