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Related Experiment Video

Updated: Jun 17, 2026

Micropatterning Transmission Electron Microscopy Grids to Direct Cell Positioning within Whole-Cell Cryo-Electron Tomography Workflows

Micropatterning Transmission Electron Microscopy Grids to Direct Cell Positioning within Whole-Cell Cryo-Electron Tomography Workflows

Published on: September 13, 2021

Theory of concentric circular grid.

M V Murty¹, A H Shoemaker

¹Institute of Optics, University of Rochester, Rochester, New York, USA.

|January 6, 2010

Summary

This summary is machine-generated.

This study introduces a novel optical aberration testing method using a circular grating to analyze point source images. The technique derives characteristic patterns for aberrations, offering an alternative to the traditional Ronchi test.

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Area of Science:

Optical Engineering
Metrology
Image Analysis

Background:

Optical systems are typically evaluated for aberrations by examining their image plane.
Existing methods often involve analyzing the image of a point source, with varying source distances.

Purpose of the Study:

To present the theory and application of a new method for testing optical aberrations.
To introduce a concentric circle grating technique for aberration analysis.

Main Methods:

A grating with concentric circles is placed at the image plane of a point source.
Characteristic patterns generated by the grating are derived for common optical aberrations.
Photographic examples of these patterns are presented for analysis.

Main Results:

The method successfully derives distinct patterns corresponding to various optical aberrations.
The derived patterns provide a visual diagnostic tool for optical system performance.
Comparison with the Ronchi test (using a linear grating) is performed.

Conclusions:

The concentric circle grating method offers a viable approach for optical aberration testing.
This technique provides a complementary or alternative diagnostic tool to existing methods like the Ronchi test.