Effect of Finite-Sized Optical Components and Pixels on Light-Field Imaging through Correlated Light

Area of Science:

• Optics
• Image Processing
• Computational Imaging

Background:

• Diffraction-limited light-field imaging uses spatial correlations on detectors.
• Conventional refocusing and 3D reconstruction rely on geometrical optics ray tracing.
• Experimental factors like finite aperture and pixel size impact correlation functions.

Purpose of the Study:

• To analyze the correlation function under realistic experimental conditions.
• To develop methods for evaluating pixel-limited resolution in refocused images.
• To propose strategies for artifact removal in light-field imaging.

Main Methods:

• Theoretical analysis of the correlation function.
• Numerical simulations incorporating experimental parameters.
• Derivation of an expression for pixel-limited resolution.

Main Results:

• The study quantifies the influence of finite optical element sizes on the correlation function.
• An analytical expression for pixel-limited resolution in refocused images is presented.
• A strategy to mitigate artifacts caused by finite optical element sizes is proposed.

Conclusions:

• Realistic experimental conditions necessitate adjustments to light-field imaging analysis.
• The developed methods improve the accuracy of resolution evaluation and image quality.
• This work contributes to more robust and precise light-field imaging applications.