Laser Focusability Calculator

For a collimated beam, the diffraction-limited focal spot size of a laser beam depends on its wavelength, the size of the beam at the lens and its M2 value. Use this simple calculator to determine your laser’s diffraction-limited focal spot size, assuming an ideal lens without aberrations and a collimated laser beam. If the beam is not collimated, then the full Laser Focal Spot Size Calculator should be used (set p to 0.01 and fill in λ, fl, θ, d).

Laser Parameters

Laser Beam Calculation

Focused Beam Diameter
:
mm

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Additional articles about power density and all of that stuff…

Laser Calculators

Ever need a quick calculation of some parameter of your laser beam? Check out these Ophir Calculators. It’s better than doing it in your head!

Laser Focusability Calculator

For a collimated beam, the diffraction-limited focal spot size of a laser beam depends on its wavelength

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Temperature Rise Calculator

Calculator for Temperature Rise in Uncooled Laser Power Sensors

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Laser Focal Spot Size Calculator

Use this calculator to get the size and location of your Gaussian laser beam waist at focus, as well as the Rayleigh range.

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Laser Power Through Aperture Calculator (Gaussian Beam)

Gaussian laser beams have power intensities in the shape of a bell curve (Gaussian).

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Laser Peak Power Calculator

Use this calculator to determine the peak power of your laser beam.

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Power Density Calculator

What is this calculator for? Use this calculator to determine the power density and/or fluence (energy density) of your laser beam.

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