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Related Experiment Video

Updated: Dec 21, 2025

$Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene$

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Field stop diffraction and sampling effects in apodized pupil Lyot coronagraphs.

Scott D Will, James R Fienup

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|May 14, 2020

Summary

This summary is machine-generated.

We analyzed coronagraph performance with field stops, finding diffraction effects are significant even beyond the instrument

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Area of Science:

Astronomy and Astrophysics
Optical Engineering

Background:

Lyot coronagraphs are crucial for exoplanet detection.
Field stops are essential components in coronagraph design.
Diffraction effects can limit coronagraph performance.

Purpose of the Study:

To predict the performance of apodized pupil Lyot coronagraphs with an occulter-plane field stop.
To investigate methods for modeling diffraction effects beyond standard numerical model fields of view.
To assess the impact of diffraction on coronagraphic wavefront control.

Main Methods:

Simulated two apodized pupil Lyot coronagraph designs.
Employed mask upsampling and analytical focal-plane envelope functions to capture diffraction.
Utilized closed-loop coronagraphic wavefront control with deformable mirrors.

Main Results:

Field stop diffraction effects were found to be significant at diameters larger than the instrument field of view.
These diffraction effects can impact wavefront control compensation.
The study highlights the importance of including focal-plane stops in the design process.

Conclusions:

Explicitly including focal-plane stops is necessary for accurate coronagraph design.
Diffraction management is critical for achieving high-contrast imaging.
Advanced modeling techniques are required for comprehensive coronagraph analysis.