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Related Experiment Video

Updated: Feb 13, 2026

A Rapid Method for Modeling a Variable Cycle Engine

A Rapid Method for Modeling a Variable Cycle Engine

Published on: August 13, 2019

Variable aperture-based ptychographical iterative engine method.

Aihui Sun¹, Yan Kong¹, Xin Meng¹

¹Jiangnan University, School of Science, Computational Optics Laboratory, Wuxi, China.

Journal of Biomedical Optics

|March 1, 2018

Summary

This summary is machine-generated.

A novel variable aperture-based ptychographical iterative engine (vaPIE) enables rapid reconstruction of sample phase and amplitude. This method requires fewer diffraction patterns and less mechanical precision, accelerating imaging for scientific research.

Keywords:

digital micromirror device phase imaging ptychographical iterative engine

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Area of Science:

Optics and Photonics
Materials Science
Computational Imaging

Background:

Ptychographical iterative engine (PIE) is a powerful lensless imaging technique.
Traditional PIE methods often require extensive data acquisition and precise mechanical control.
Limitations in speed and accuracy hinder broader application of PIE.

Purpose of the Study:

To introduce and validate a variable aperture-based ptychographical iterative engine (vaPIE).
To demonstrate vaPIE's capability for rapid and accurate reconstruction of sample phase and amplitude.
To reduce data acquisition time and reliance on mechanical precision in ptychography.

Main Methods:

Utilizing a modified PIE algorithm with a variable aperture.
Step-by-step adjustment of aperture size to vary illumination on the sample.
Sequential recording of diffraction patterns for reconstruction.

Main Results:

Successful numerical and experimental demonstration of vaPIE.
Faithful reconstruction of sample phase and amplitude achieved.
Significant reduction in the number of required diffraction patterns compared to conventional PIE.

Conclusions:

vaPIE offers a faster and more robust alternative to traditional PIE.
The method is less sensitive to aperture parameters and mechanical stage accuracy.
vaPIE holds potential for diverse applications in scientific research requiring rapid imaging.