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

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