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Abbe Diffraction Limit Calculator

Compute microscope resolution limit d = 0.61 λ/NA.

Input Data

Input Wavelength λ.
m
Input Numerical aperture NA.

Results

0m
d = 0.61 λ/NA = 4.4733e-7 m

At a glance:Abbe Diffraction Limit Calculator: enter parameters to compute results; complements related calculators.

Formula

d = 0.61 λ / NA

NA: numerical aperture

How to Use

  1. Enter illumination wavelength λ.
  2. Enter numerical aperture NA.
  3. Get minimum resolvable distance d.

Case Studies

λ=550 nm, NA=0.75

d ≈ 4.47×10⁻⁷ m (≈0.45 µm).

FAQ

How to improve resolution?

Increase NA or shorten wavelength (violet light, oil immersion).

Related Tools

References

Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.

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