If you were going to make a handyman knock-off of something like the Treventus Scan Robot,
you might try mounting two wide LIDE sensors in the plunging head movement, angled slightly.
Then the rest of the design would be something like building two flatbed scanners or contact image
scanners in parallel, with two separate data paths (one for each facing page), but on a common arm
movement incorporating a vacuum system. I imagine you'd want to shoot for ~600 dpi resolution.
The problem with this scheme is that commonly-available LIDE sensor heads are 216 mm wide!
This might be fine for some applications, but I'll bet something closer to A4-long (about 300 mm
wide) would satisfy most applications. I'd hate to contemplate the alternatives:
- * gang sensors together along the width, and deal with inter-sensor seams;
* move the sensors axially to make up the width, and stitch the data;
* scan the book more than once and stitch the data;
* a possible optical solution to cram a 300 mm scan width onto a 216 mm sensor;
* or, just live with the width limitation.
-- Cal in Louisville KY