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Natural Science Forum / Physics / Optics / April 2005spreading LED beam
I just bought some powerful IR LEDs that have a narrow beam, the guy says 15-20 degrees, no specs, hmm. Anyway, I'd like them to be more diffuse say 60 degrees 2x half maximum. Should I just lightly sand the top of the lense? Is there a better method, eg. chemical etch. Am I going to lose total output due to surface absorption? thanks Lyle > I just bought some powerful IR LEDs that have a narrow beam, the guy says > 15-20 degrees, no specs, hmm. Anyway, I'd like them to be more diffuse say [quoted text clipped - 5 lines] > > Am I going to lose total output due to surface absorption? Cut off the rounded lens with a sharp (perhaps heated) knife. It could be sawed but then you'd have to re-polish. Frosting the surface will cause considerable attenuation. The light would be more scattered than absorbed. |
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