Recent content by rayellam

oops, 25/(PI R2) =25mW/10.4 = 2.4mW/mm2

OK, sorry may math is not good. I calculated the beam radius of the point source based on a right angled triangle. LED height = 5mm Radiant flux = 25mW Divergence = 20 degrees So beam radius = (5 / tan70) = 1.82 Then 25mW/1.82mm = 13.73 mW/mm2 ? Ray

Hi Andy, Well thanks for the help on this :-0...well I get the genius bit but unfortunately the information to my original question is a little on the ‘light’ side (pardon the pun). I was only looking for some pointers and a little help. Ray

Hi, I’m hoping some genius can help me out here. I’m 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...