Calibrating The Scanner; Focus Calibration - imacon Flextight Precision II Guide De L'utilisateur

Calibrating the Scanner

The scanner requires three 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 19 for more information.
¥ White calibration is only required for reßective scans (it is done auto-
matically for transparencies). During calibration, the scanner scans a
white target to establish the white point along the full length 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 21 for more information.
¥ 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 23 for more information.
All three procedures are simple and are initiated from the software.

Focus Calibration

The Flextight Precision II 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.
Note that you must not calibrate the scanner every day. It is intended
that the scanner be calibrated not more than once every three months.
In most cases, this procedure will never be necessary.
Use the procedure below to calibrate your scanner:
1. Locate the transmission calibration target that came with your
scanner (it should be in your manuals binder). It is a 6X6 cm square
of clear plastic with many black lines on it.
Imacon Flextight Precision II UserÕs Guide
Hardware ReferenceÑFlextight Precision II
Calibrating the Scanner
19