Max burning potential?
For a given output power, shorter wavelengths will burn more. Shorter wavelengths <450nm will also have no problems burning light-colored substances such as white paper.
UV lasers aren't very powerful, and they're expensive. 808nm IR is the cheapest in terms of $/mW.
445 is still the best overall burner, though. Packing 1W of optical power and a short wavelength, it makes easy work of anything while still being affordable ($45 diodes).
Also, with ANY burning laser, make sure you know about laser safety, and use protective eyewear. You only get one set of eyeballs.
I think I remember reading somewhere or just hypothesizing this myself, but I believe a lower wavelength laser can also focus down to a smaller point. Which from what I understand, is why a blu-ray disk can hold so much more data than a DVD. Because the smallest focus point of the 405nm laser is maybe a 1/5th the size of a DVD laser's smallest focus point, thus giving it more surface area on the disk to read from. And enabling the BD disk to hold much more data than a conventional DVD.
this is true but it is not really relevant to our hobby because our lenses are nowhere near as presise as lab lenses. and our eyes cant see that small.
i'm pretty sure i read it doesnt matter. hopefully pbd will chime in. and your violet is more easily absorbed by materials.
ex. my dilda is 180mw... i can focus it till the sky falls down but i will never burn myself with it. but my violet doesn't even have to be focused for me to even feel heat.
The red color of the dilda is dissipated out into the lower layers of skin. Try focusing it on a dark freckle or a mole :eg: