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Old Jun 23rd 2009, 04:27 PM   #1
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Join Date: Jun 2009
Posts: 1
radiant intensity

Hi,
Iím hoping some genius can help me out here. Iím trying to determine how many joules of energy per square centimeter (from an LED) are radiated onto a body given the following parameters.

LED radiant intensity = 80mW/Sr
LED diameter = 5mm
LED beam +/- 20 degrees

Wavelength = 880nM
Total radiant flux = 25mW
Distance from LED to body = 5mm

Thanks
Edgar
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