Installation site
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This disappears when the housing temperature has adjusted to the
ambient temperature. Condensation moisture can lead to poor scanning
results or even damage the scanner.
The scanner location should have a controlled ambient light situation.
The light scenarios should avoid direct sunlight or spotlight from light
beams. Also, light sources that cause sharp shadows on the document
on the book cradles or high levels of ambient light could negatively
influence the scan result.
The scanner is an open system with a built-in high quality light source.
Open system means that the ambient light is added to the light seen by the
camera. Summary of a recommended location for a scanner: The location
is not exposed to daylight. It is evenly illuminated from the ceiling with
fluorescent lamps that have electronic ballasts. The light intensity
measured on the book cradles should be between 300 and 800 lux. The
light should not cause any shadows; therefore, the variation of the
intensity across the scan area should be kept below 20%. Fluorescent
lamps, powered by nonelectronic ballasts, can produce a flicker twice the
frequency of the main power supply (100Hz or 120Hz). The same applies to
certain simple LED luminaires. If the intensity of this light becomes too
high, vertical stripes will be visible on the scan. Direct sunlight will result in
overexposed images. Sunlight can also produce distinct shadows. Light
beams from spotlights will also change the color of the scans. The scanner
has an i
ntegrated “White Balance” function. This function will compensate
ambient light influences. A “White Balance” calibration is recommended
when the light scenario has changed.