Protecting Against Dust, Oil, And Scratches; Cleaning The Sensor Window; Maintenance - Dalstar 1M60 User's Manual And Reference

1M60 Camera User's Manual

Protecting Against Dust, Oil, and Scratches

Cleaning the Sensor Window

5.2 Maintenance

DALSA
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.
Scratches can be caused by improper handling, cleaning or storage of the
sensor. 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.
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.
There are no user serviceable parts on this camera. Please contact DALSA
service.
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