Utilize our Laser Beam Spot Size Calculator to precisely determine the focused diameter of a laser beam. This essential tool helps engineers and researchers in optical system design, ensuring optimal performance by calculating the diffraction-limited spot size based on key parameters like wavelength, focal length, and input beam diameter.
Formula:
Laser Beam Spot Size Formula
The diffraction-limited focused spot size (d) for a Gaussian beam is calculated using the formula:
d = (4 × λ × f) / (π × D)
- d = Focused Spot Size (Beam Waist Diameter)
- λ = Laser Wavelength
- f = Focal Length of the Lens
- D = Input Laser Beam Diameter
- π ≈ 3.14159