Dalsa Dalsa DS-4x-06M18, User'S Manual And Reference

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6M18 Camera User’s Manual 36
DALSA 03-32-10017-03
8. Always store the devises in conductive foam. Alternatively, clamps can be used to short all
the CCD pins together before storing.
The above ESD precautions need to be followed at all times, even when there is no evidence of
CCD damage. The rate which electrostatic charge dissipates depends on numerous environmental
conditions and an improper handling procedure that does not appear to be damaging the CCDs
immediately may cause damage with a change in environmental conditions.
Protecting Against Dust, Oil, and Scratches
The CCD window is part of the optical path and should be handled like other optical components,
with extreme care.
Dust can obscure pixels, producing dark patches on the sensor response. Dust is most visible when
the illumination is collimated. The dark patches shift position as the angle of illumination changes.
Dust is normally not visible when the sensor is positioned at the exit port of an integrating sphere,
where the illumination is diffuse.
Dust can normally be removed by blowing the window surface using clean, dry, compressed air,
unless the dust particles are being held by an electrostatic charge, in which case either an ionized
blower or wet cleaning is necessary.
Oil is usually introduced during handling. Touching the surface of the window barehanded will
leave oily residues. Using rubber fingercots and rubber gloves can prevent contamination.
However, the friction between rubber and the window may produce electrostatic charge that may
damage the sensor. To avoid ESD damage and to avoid introducing oily residues, only hold the
sensor from the edges of the ceramic package and avoid touching the sensor pins and the window.
Improper handling, cleaning or storage of the sensor can cause scratches. Vacuum picking tools
should not come in contact with the window surface. CCDs should not be stored in containers
where they are not properly secured and can slide against the container.
Scratches diffract incident illumination. When exposed to uniform illumination, a sensor with a
scratched window will normally have brighter pixels adjacent to darker pixels. The location of
these pixels will change with the angle of illumination.
Cleaning the Sensor Window
1. Use clean, dry, compressed air to blow off loose particles. This step alone is usually sufficient
to clean the sensor window.
2. If further cleaning is required, use a lens wiper moistened with alcohol.
3. We recommend using lint free, ESD safe cloth wipers that do not contain particles that can
scratch the window.
4. Wipe the window carefully and slowly.
5.2 Maintenance
There are no user serviceable parts on this camera. Please contact DALSA service.