Building Near Infrared LED Device for treating my arthritis
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Hi Alex, yes I'm sure they will work the same, but question how many are required.
The product states:
200 mW/cm² @10cm
20 mW/cm² @ 70cm
Beam angle: 30 degrees
The LEDS you have selected are a similar angle
Angle of half intensity: ϕ = ± 38°
The power seems to be a peak power when pulsed
Radiant power IF = 100 mA, tp = 20 ms φe 55 mW
I haven't looked hard enough at the spec, is there a typical DC operating current and radiant power? That would be much easier to drive using a standard LED constant current driver. It would appear anything bellow 100mA DC is OK.
Looking at the original lamp data the theraputic range is 20 to 200mW/square cm so working out how many LED's with the distribution over the working area you want is the next step. I'll try to think this through when less tired :)
I had seen elsewhere someone proposing using minuture 830nm laser diodes without a lens to get a bigger power distribution, but cannot see why laser diodes would be any better than your LED choice.
This scientific PDF search engine can find some interesting articles http://www.freefullpdf.com/#gsc.tab=0&gsc.q=830nm%20diode&gsc.sort= Seems 830nm is good for wound healing as well.