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Related Experiment Video

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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Published on: April 1, 2020

Computational method for deriving the geometric point spread function of an optical system.

Chien-Sheng Liu¹, Psang Dain Lin

¹Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan. chienshengliu@itri.org.tw

|January 12, 2010

Summary

This summary is machine-generated.

This study introduces an irradiance-based method for calculating the geometric point spread function (PSF) of optical systems. The new technique offers an accurate and efficient way to estimate PSF, crucial for image formation theory.

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Area of Science:

Optical Engineering
Image Formation Theory
Computational Optics

Background:

The geometric point spread function (PSF) is vital for understanding image formation in optical systems, representing the system's response to a point source.
Existing methods for deriving the PSF are limited, often requiring extensive ray tracing and complex image plane meshing.

Purpose of the Study:

To present a novel, irradiance-based method for computing the geometric PSF of optical systems.
To demonstrate the accuracy and efficiency of the proposed method compared to traditional ray-counting techniques.

Main Methods:

The study utilizes an irradiance model that considers energy conservation along a single light ray to compute the geometric PSF.
The method involves a single ray tracing operation, significantly simplifying the computation process.

Main Results:

The proposed method provides a reliable and accurate estimation of the PSF.
It enables precise calculation of the centroid and root-mean-square radius of the focus spot.
The method's quality is independent of the number of rays traced or the grid size.

Conclusions:

The developed irradiance-based method offers an efficient and accurate solution for calculating the geometric PSF.
This approach simplifies the computation of essential optical system performance metrics like the merit function and modulation transfer function.