Hi
I think everyone have seen those yellow laser modules (with a little driver , LED and ... inside the housing)
Do those include lenses ? And , Do I have to add any lenses ? That really matters because I don't have access to famous online shops who sell loads of lenses and ... where I Live and I don't know where to buy them locally so Finding a lens is a pain . I have attached a photo of the laser .
Another question I have is that , does wavelength really matter when choosing a lens ? I have a DVD writer lens but my laser is 405nm (very important to be 405nm) ? Or can I use lenses that are for "Power LEDs" ? Those Lenses are for LEDs that go up to 5w , no matter how much absorbance is different that lens is for 5w and my laser is 200mw or 50mw (at max 1/25 the wattage of those power LEDs) ?
And another question is , Is it even important to focus the beam ? I am going to use the UV or NUV or violet or whatever ray for curing epoxy (SLA 3DP) and I really doubt if focusing is required because normally , 20mw is used for this case but I am using 200mw (couldn't find 20mw UV , 50mw was the minimum that I've attached pic of) . I could just use a 300 micron nozzle to ensure a 300-micron-wide beam passes and I get precision ?
Thanks in advance.
I think everyone have seen those yellow laser modules (with a little driver , LED and ... inside the housing)
Not me. I've seen red, green or blue, but not yellow.
405nm is blue light.
, Is it even important to focus the beam ?
Isn't that for you to decide?
AWOL:
Isn't that for you to decide?
idk . Wondering If curing epoxy with 10 times the needed power really needed focus , or a 300 micron hole to make the beam smaller was OK ?
And mostly asking which lenses worked and which didn't , for example , does a power-led lens work for this job , or ...?
And is there really a lens in those modules ? A lens to make good focus ?
Is it a yellow laser? Or 405nm? 405nm is violet/near uv. It's either yellow, or it's 405nm...
You can't see if there's a lens from the picture, since you're not showing the end of the laser where any lens would be. I've seen brass tubes like that with the lens included, but I suspect they also exist without it.
If the people who know light-cured 3d-printers of the type you're working on say you need to use a laser, they probably say that because it has to be focused. Otherwise, you could just use some 405nm LEDs - and you could get at least 5 watts of them in 1W bead packages for the price of that 50mW laser, so I can't imagine that anyone else would be using the laser... unless the focus was needed. If you're making the shape by selectively curing resin, it definitely needs to be focused (think about it). If the shape is made by pumping out that resin while curing it, so there isn't uncured resin sloshing around that shouldn't be cured, then you don't need to focus on it.