Laser MPE Calculator — Maximum Permissible Exposure

Irradiance Calculator

Beam Diameter at Aperture

Divergence

mrad

Distance to Audience

Laser Power

Diameter at audience —mm

Min. diameter (> 7mm) —mm

Beam area —mm²

Irradiance —mW/cm²

Enter values to check safety

Beam Diameter at Aperture

Beam Diameter at Distance L

Distance L

Calculated divergence —mrad

Tip: Measure beam diameter at two known distances to determine divergence, then use the Irradiance Calculator for MPE assessment.