imacon Flextight Progression, User Manual

Page: 27 / 226

Imacon Flextight Progression UserÕs Guide
Hardware ReferenceÑFlextight Progression
Calibrating the Scanner
25
English
Calibrating the Scanner
The scanner requires four types of calibration:
¥ Focus calibration adjusts the positioning of the scannerÕs optics for
each zoom level. If your scans are coming out unfocused or at
slightly the wrong size, then you may need to make a new focus cal-
ibration to adjust the zoom mechanism. The focus calibration is
stored in the scannerÕs ßash PROM, so it is preserved when you
move the scanner to a new computer. See ÒFocus CalibrationÓ on
page 25 for instructions.
¥ Electrostatic white calibration is only required for reßective scans that
use the electrostatic plate. During calibration, the scanner scans a
white target to establish the white point along the full width of the
scannerÕs CCD. The results of the white calibration scan are saved on
your computerÕs hard disk, so you must make a new white calibra-
tion if you move the scanner to a new computer. See ÒWhite Calibra-
tion for ReßectivesÓ on page 27 for instructions.
¥ Under-glass white calibration is only required for reßective scans in
which the original is located under the glass plate (e.g., thick origi-
nals). White calibration is done automatically for transparencies
made using either the drum or ßatbed. The purpose of this calibra-
tion is the same as for the electrostatic white calibration and the pro-
cedure is similar. You must make two white calibrations because the
optical properties when using the glass plates are signiÞcantly dif-
ferent than when using the electrostatic plate. See ÒWhite Calibra-
tion for ReßectivesÓ on page 27 for instructions.
¥ CCD calibration ensures that all of the pixels in the CCD react equally
to low-level light. CCD calibration is done at the factory and stored
in the scannerÕs ßash PROM, so you probably will never need to
recalibrate. See ÒCCD CalibrationÓ on page 28 for instructions.
All four procedures are simple and are initiated from the software.
Focus Calibration
The Flextight Progression scanner uses an adjustable zoom and focus
mechanism to optimize its scanning resolution for each of the original
formats it can handle. If you suspect your scans are not as sharp as they
should be, then you may need to calibrate your scanner.