Converting w/m2 to uJ/mm2, 4usec pulse

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SUMMARY

The conversion of light energy from 138 W/m² to microjoules per square millimeter (uJ/mm²) at a 4 microsecond (µs) pulse is accurately calculated as 5.54e-4 uJ/mm². This calculation is based on the formula J = W * seconds, where J represents energy in joules. The assumption of a boxcar shape for the light pulse is essential for the accuracy of this conversion. The discussion confirms the validity of the calculation under these conditions.

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  • Understanding of energy conversion formulas (J = W * t)
  • Familiarity with light energy measurements in watts per square meter (W/m²)
  • Knowledge of microsecond (µs) time intervals
  • Concept of boxcar pulse shapes in signal processing
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I need to convert light energy: 138W/m2 to uJoules / mm2, at a 4usec pulse

J = W * seconds
J = 138 W/m2 * 4e-6
= 5.54e-4 J/m2 5.54e-4 J/m2 = 5.54e-4 uJ/mm2

answer:
5.54e-4 uJ/mm2Does this look correct?
 
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It is correct if the light pulse can be assumed to have a box car shape in time.
 
blue_leaf77 said:
It is correct if the light pulse can be assumed to have a box car shape in time.

Thanks blue_leaf. Yes, I have nice controlled square pulses. I was given some numbers to beat by a Xenon strobe, but the numbers seemed off. Good to know.
 

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