- Aug 25, 2007
But both of those sizes are way smaller than you'll ever actually be able to foces a laser pointer without multiple lenses and much more complicated optics. It's pretty much a completely moot point for a laser pointer, because you're never going to get it that small anyway. For all intents and purposes, that correlation is irrelavent for all but the applications where you have a full optics table and all the knowledge and resources necessary to construct a good optical system.Thanks, yeah crest-to-crest, sorry, was thinking wave amplitude.
"Beam size doesn't equal wavelength"? But wavelength determines beam-size (diameter at the focal point).
Seems we are going in circles here. :thinking:
My point in simple terms: You can focus a bluray laser to a smaller point than you can a red laser.
But I do see what you're trying to say, that a lower wavelength can be focused to a smaller size. But it isn't in any application I've ever seen on this forum, at all. Wavelength can influence beam size, but it won't influence beam size in any application I've ever seen on this forum because a host of other factors will be limiting the minimum beam size to a number a LOT larger than the wavelength of the laser.