Homebrew PCBs

I did some thinking about this as well.  I found on this list that
some pre-sensitised PCB are sensitive in the range of 340 to 400 nm,
and peak at about 360nm.  The LED that I bought has an output at
405nm.  As far as power, just move slower!  A co-worker's friend, who
works with optics as a consultant, said it wouldn't be hard to pick
some lenses and fiber from Edmund scientific to foccus most of the
LED's light into the fiber.  And if I were more serious I might be
able to get him to help me design something, but due to too many
projects, trying this will most likely just be a through experimnet
for me...

- Steven Ciciora

--- In Homebrew_PCBs@yahoogroups.com, "Leon Heller" <leon_heller@h...>
wrote:
> 
> >From: "Mike" <yahoo@d...>
> >Reply-To: Homebrew_PCBs@yahoogroups.com
> >To: Homebrew_PCBs@yahoogroups.com
> >Subject: [Homebrew_PCBs] Re: OHP Film & Laser Printers,  UV Laser Diode
> >Date: Sun, 03 Oct 2004 00:41:20 -0000
> >
> >
> >
> >--- In Homebrew_PCBs@yahoogroups.com, "Thomas" <teecee@c...> wrote:
> >
> > > This UV Laser thing has me thinking (dangerous I know)  so slap me
> >for bringing this up !! but during a few search's I come across some
> >info that uses a UV Laser Diode in a DVD-R Burner & goes on about
> >Photoresist being part of the Layer that records the Data, if its
> >similar stuff or not i dont know. Maybe the UV Laser is to small and
> >possible the focal point could be changed  to get a wider beam for
> >Exposure, sounds easy enough but I bet it aint !!
> >
> >Possibly more useful than Lasers, Non-laser UV LEDs are available on
> >Ebay etc for around 10-20c each. They seem to work fine directly off
> >2x1.5v AA cells. The beam is divergent at an angle of approx 20
> >degrees on the ones I have. I would imagine that it would be
> >focussable with relatively inexpensive lenses too, or get a bunch of
> >fibre optics and adapt an old dot matrix printer :o)
> 
> 
> The wavelength needs checking, to make sure it is correct. The power
also 
> needs to be checked, I don't think that UV LEDs will have enough power.
> 
> Leon