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NanoParticle
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Re: Optical mouse vs. laser mouse Actually, DIODE LASERs *are* LEDs, but of a sort. LED stands for Light Emitting Diode, and Heterojunction LASERs, such as those used in electronics such as mice, are semiconductor, DIODIC devices.
In fact, what it took to make them work is nothing short of a scientific miracle. Scientists went through countless iterations until they found that the hetero junction, with the right level of dopant, and cleaved the right way, and on and on, well, you get the picture. And what is even a more remarkable miracle are the new "blue" diodes, Some 15 years ago people even wondered if we would ever be able to make such Diode LASERs work without blowing within seconds. Science has come an incredibly LONG way. When I was in college for Photonics, we talked about Blue Diode LASERs like they were the Holy Grail.
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