Homebrew PCBs

No way, UV lasers are too weak.
Lens collimator source is what I'm asking for.
Thanks.

"Earl T. Hackett, Jr." <hacketet@...> wrote:
laser beams are almost perfectly columinated.  You just have to control dot size.  The simplest technique would be to use a pinhole just a bit smaller than the circuit trace you want to create and just trace the circuit.  That would get the job done in a reasonable time period.  A 0.025 mm dot size would be appropriate for a raster scan technique.  I think a .15mm dot size would do just about any board you want and with a 10 second exposure the speed would be about 90 mm per minute.  That would image a small board in a reasonable time period.


----- Original Message ----- 
  From: Steve 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Monday, May 02, 2005 11:00 AM
  Subject: [Homebrew_PCBs] Re: collimator help


  I think he means he wants to collimate a UV laser beam.

  Steve Greenfield

  --- In Homebrew_PCBs@yahoogroups.com, "Brian Clancy" <bclancy1@b...>
  wrote:
  > G'day
  > I haven't tried it myself but I one saw reference to using the eggcrate
  > diffuser for flourescent lights and painting it matt black to eliminate
  > reflections.
  > 
  > There was a light loss involved of about 25% I think.
  > 
  > Cheers
  > Brian 
  >  
  > -------Original Message-------
  >  
  > From: Homebrew_PCBs@yahoogroups.com
  > Date: 05/02/05 14:49:49
  > To: Homebrew_PCBs@yahoogroups.com
  > Subject: [Homebrew_PCBs] collimator help
  >  
  > Anyone knows where to order an UV Collimator?
  > I'm working to replace the mill on a CNC Milling Machine with a
  .0254mm UV
  > beam, on presensitivized PCB.
  > Cristian
  > 





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