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Irradiance and NOHD

Irradiance at a distance against the MPE, and the nominal ocular hazard distance.

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System

Units

Laser line

WavelengthnmPowermW

Beam diameter at the aperturemmDivergencemrad

Divergence angle

Datasheet convention

DistancemExposure time0.25 s is the aversion response.s

Enter the laser line, beam and distance to see results.

Planning figures from published formulas. They do not replace a measurement, a laser safety officer's evaluation, or the terms of your variance. MPE from IEC 60825-1:2014 Table A.1, visible point source. Spot size uses the small-angle form.