If I understand what was discovered in TFA (and press release noted by Trepidity), the etched scales reduce the internal reflections of the produced light which result in some of the produced light being lost in the structure of the LED and lens.
Does anybody know how much light is actually lost within the LED and lens? The article mentions that the extrated light is increased by 55% which implies that at least a third of the light produced by an LED is lost within the structure - would this be correct?
I would presume that this loss would be influenced by the shape of the LED lens - correct? I seem to remember that pin through hole LEDs are designed with the emitter at the focus of the curved lens to minimize reflected losses BUT this could be a huge advantage for SMT chip LEDs which tyically just have a flat surface for the lens.
Are there other applications in which this can be used as I would think that this could be useful in other applications? I would guess that adding the triangular "roof" structure would make it difficult to focus/direct the light produced by the LED. This would mean that the typical power dispersion patter of a typical LED would be evened out and the light output would be difficult to focus - correct?
myke
Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/mIU7SOGaVHw/story01.htm
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