On Dec 21, 1:36*am, "DoN. Nichols" wrote:
On 2009-12-19, RoyJ wrote:
...So -- add a
mirror on the wall behind the operator, and bounce it to another wall
more distant. *Sum the distances.
* * * * * * * * DoN.

The mirror has to be *very* flat over the height of the column travel.
You might find one that's good enough in a scrapped scanner.

jsw