On Fri, 12 May 2006 21:43:22 -0500, Martin H. Eastburn wrote:
What you need is back lighting - through frosted milk glass.

You can get some of that at a glass company. The scanner reflects off the surface
with the internal lamp - hope you have a way to turn it off. I do on my HP -
I plug in the Slide / film unit and it is a lamp. Turns off the internal reflection
lamp.

Well, you've just reinvented the transparency scanner. But lighting is
only part of it, resolution still isn't quite there. The example I
posted at 3600 DPI is mostly readable but hardly clear. Optical
resolution is the only thing that'll get you there.