Edge lighting
Posted: 14 Sep 2015, 09:49
Hi Everybody,
I'm newbie. As mentioned in topic subject have an idea about lighting the document platen.
Unfortunately my workshop is in ruins (boxed up to move), so i can't carry out experiments.
What if the underside of a Plexiglas platen is evenly fine sanded and LED edge lighting applied in to the platen.
The diffused light should escape to the document then reflect back to the cams.
This comes from I used Plexiglas board as daily data collection sheet.
I enclosed the hard-copy sheet (data form) in a plexiglas envelope and i sanded the top sheet thoroughly.
The printed page below was clearly visible through the sanded plexi sheet.
On the sanded side i fill up the form with a pencil (graphite), then, after writing in the log i could erase the pencil marks and reuse the form.
(The classic mechanical pen tablet, but waterproof and minus 20/30 celsius no problem for pencil flow)
Happy experimenting
I'm newbie. As mentioned in topic subject have an idea about lighting the document platen.
Unfortunately my workshop is in ruins (boxed up to move), so i can't carry out experiments.
What if the underside of a Plexiglas platen is evenly fine sanded and LED edge lighting applied in to the platen.
The diffused light should escape to the document then reflect back to the cams.
This comes from I used Plexiglas board as daily data collection sheet.
I enclosed the hard-copy sheet (data form) in a plexiglas envelope and i sanded the top sheet thoroughly.
The printed page below was clearly visible through the sanded plexi sheet.
On the sanded side i fill up the form with a pencil (graphite), then, after writing in the log i could erase the pencil marks and reuse the form.
(The classic mechanical pen tablet, but waterproof and minus 20/30 celsius no problem for pencil flow)
Happy experimenting