ֲƱ Focusability (Gaussian Beam)

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 Focal Spot Size Calculator should be used (set p to 0.01 and fill in , fl, , d).

 

Check our other laser measurement tools:

Sensor Finder  • ֲƱ Peak Power Calculator  • ֲƱ Focal Spot Size Calculator  • ֲƱ Power Through Aperture Calculator  • ֲƱ Focusability Calculator

 



ֲƱ Focusability (Gaussian Beam)

ֲƱ - ҳ

Wavelength

(nm) *

Lens focal length

(mm) *

Beam diameter (at lens)

This is the 1/e2 diameter of the Gaussian beam. It's the point at which the power is about 13.5% of the peak power.

(mm) *

M-Squared

*


Read More About This
       
ֲƱ Beam Optics Calculators   How To Calculate ֲƱ Beam Size   Focusing A Gaussian ֲƱ Beam: Which Formula To Use?   A Beginner's Guide To ֲƱ Power Measurement