Avoiding Newton Rings In Transmission Scans; Avoiding Dust - Scan View SCANMATE F10 User Manual

minutes longer than usual. The extra time is used to bring the reflection lamps
up to optimum scanning temperature, thus ensuring a consistent high
scanning quality. Because of this feature, it is an advantage to group
reflection scans together whenever possible in the production flow.

Avoiding Newton rings in transmission scans

When scanning transparencies with a flatbed scanner, Newton rings are
always a potential problem, due to residual moisture in the transparency
(especially the base or non-emulsion side) and the effect of laying the
transparency flat against one or more glass plates.
The ScanMate F10 has an anti reflection-treated mounting plate that is
very effective in reducing the risk of Newton rings. It is designed to produce
optimal results for both reflection and transmission scanning when the
originals are "sandwiched" between the base plate and top plate.
If you encounter problems with Newton rings in spite of this, consider
the following suggestions:
• Check that the glass cleaner used for the mounting plate is not leaving
residues. If it is, try a different type or brand of cleaner.
• 35-mm transparencies can be scanned without removing them from their
frames. At scan resolutions under 1800 dpi, the scanner's depth of field
will be sufficient. At higher resolutions, Autofocus is recommended.
• With ScanView's optional DustFree magnetic templates (described
above), scanning is completely glass-free, removing the cause of Newton
rings. Magnetic templates are available from your local ScanView dealer.

Avoiding dust

Dust can be a problem in flatbed scanners, partly because of the number of
surfaces present and partly because of the high depth of field of the optics
system. Dust specks that would be entirely out of focus on a drum scanner
may appear very sharp when scanned on a flatbed.
One way to minimize dust is to use ScanView's optional DustFree
Handling originals and mounting plates
ScanMate F10 • Operator's Manual
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