Diffraction sampling comparison calculator

Calculate airy first-zero diameter and pixels per Airy radius with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use airy first-zero diameter and pixels per Airy radius to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Wavelength (nm)
550
F-number
8
Pixel pitch (µm)
4
Airy first-zero diameter (pixels)
2.684
Pixels per Airy radius
1.342

Try another scenario

Wavelength (nm)
605
F-number
8
Pixel pitch (µm)
4
Airy first-zero diameter (pixels)
2.9524
Pixels per Airy radius
1.4762
Calculation method

Calculation method

Airy first-zero diameter (pixels)

Disc diameter/pixel=2.44 wavelength µm fnumber/pixel pitch.

Pixels per Airy radius

Disc diameter/pixel=2.44 wavelength µm fnumber/pixel pitch.

Symbols and units
a
Wavelength (nm)
b
F-number
c
Pixel pitch (µm)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Sampling comparison only; not a complete modulation transfer or image-quality assessment. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Sampling comparison only; not a complete modulation transfer or image-quality assessment.
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Further reading

Method reference ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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