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THE FEUTEX TOOLKIT

Diffraction Disk and Pixel Comparison

Compare Airy disk diameter with sensor pixel pitch.

Photography workspace● Runs in your browser
01 Your input
02 Your result
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FormulaAiry disk diameter = 2.44*w*n/1000; Disk diameter in pixels = 2.44*w*n/(1000*p)
Sources and model references

Worked example

Inputs

Wavelength
550 nm
F-number
8
Pixel pitch
4 µm

Expected results

Airy disk diameter
10.736 µm
Disk diameter in pixels
2.684 pixels

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Compare Airy disk diameter with sensor pixel pitch.
  2. Set wavelength, f-number, pixel pitch in the indicated units.
  3. Calculate and compare airy disk diameter, disk diameter in pixels.

Try this example

{
  "w": 550,
  "n": 8,
  "p": 4
}

Accuracy and scope

Idealized educational model. Enter measured values in the displayed units; real systems may require additional corrections.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.