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Okay thanks for the explanation and endurance :D So I guess aixiz modules also just work with a single convex lense, and by moving the focal point into the center of the diode we get a nice low-mrad beam that is still capable of burning some stuff.

I see... 150mA is the regular "wuzz" current for burner diodes and 300mA is the current LPF users run burner diodes on 8-) So 300mA should be ok (with an eye on the temperature) with any harvested burner diode?

just found the sony dvd burner diode data sheet directly from stonetek... it says 150-170mA operating current... NOW I'm confused... If I harvest a diode from a dvd burner (like my old NEC that may be used for this) how do I find out how far I can go with the current for the diode without...

Thanks for the information. I cannot post links, but (just as example) people at "laser community" say 100-150mA... Of course I trust you more :D

Sorry for asking again, but is "the 16X RED diode" not the same thing as a red laser diode from a 16X DVD-burner? Or why do other people run their DVD-diodes with a maximum current of 150mA, if you tell me 300mA would be fine?

huh? dvd-burner-diode driven by 300mA current? I read 150mA maximum several times elsewhere...

Technically (from the view of a physics student) converging and then parallizing (does that word exist??) should work. If I put the concave lens in front of the laser, the beam will diverge even more that it does without lenses. If I then add a convex lens in front of the concave lens, I could...

hey! I am quite new to lasers, but I have understood everything about it. I plan to build a LM317-driven DVD-burner laser module. I have access to small glass lenses from old cameras, both concave and convex. Now I could not found a serious tutorial about building a optical system to archive a...