- I am honestly not sure that the cheap blue sources are here, at least not for long. Sure, the cheap blue sources are here for some people, and for some length of time. But for me, the question is -- for what people and for what length of time?
Of course we've heard that people are harvesting 445nM blue diodes from Casio projectors. But, unless you're on the inside track, you might not have heard that Casio has pulled these from the shelves, and their lawyers are prepared to send out a letter, warning people not to remove them under the threat of legal action. Sure, for hobbyists, I doubt Casio will be knocking on your door, but for anyone actively selling these diodes, or products (for example laser pointers) in large volume, I think there could be trouble here...
Also, what I have heard is that Casio is happy with the results of the projector -- I mean happy with the blue source, and happy that the process of blue creating a green source works, but for the future they will come out with a projector that has a different kind of blue laser -- a kind of "diode bar" that will not be useful for lightshow applications.