>From: "Mike" <yahoo@...>
>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