Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

At 01:16 PM 19-09-16, you wrote:
>
>
>About a year ago I posted a querie about using a UV LED or low power
>UV Laser to activate the resist on pre coated PCB using a CNC Rig.
>At the time of posting a 400nM (40nM?) cost 45 English Pounds. the
>Laser module included a collminating Lens and a 5V active control
>circuit with a beam on/off 5V control/modulation input.
>As i had no response, i shelved the idea. The only possible drawback
>would be slowing down the step speed to enable the setting of the resist.
>Any thoughts on this concept/idea would appreaced
>chester



Hello Cristian
>Bungard (a German company) is doing that with a 120mW UV 420nm laser
>module, at a reasonable speed.
>That means it can be done and sold.
>You can see my calculation on the # 7204 / 2004 post in the Archive.

>They sell that module for around 1.000 Euro, what I consider too expensive.

>A normal UV laser diode outputs a square beam.
>To get it round you need to expand it with a lens, to pass that
>expanded beam through a round iris
>and to focus it with a normal lens.

>Collimating would be very useful, but focusing to 0.1mm diameter at a
certain distance will suffice.

>My question is: do you know a round output UV laser module of
>100-150mW of power?
>Let me know the link to your 45 GBP collimated laser module, please.
>Cristian


The mentioned laser module has been discontinued by RS Components.
Here is the data sheets folder that I accumalated.
check out the CNI 405nM Laser Diode, and go to the website to find a local supplier.

On the subject of lens collimating a possible solution would be to use a optic fiber from the laser to the tool head