Dalsa 1M60 User Manual download pdf (Page 34)

34 PANTERA 22M User’s Manual

Teledyne DALSA 03-032-20049-02

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 an ionized air gun.

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, avoid touching the sensor.

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

Equipment Required

 Glass cleaning station with microscope within clean room.

 3M ionized air gun 980

(http:/ / solutions.3mcanada.ca/ wps/ portal/ 3M/ en_CA/ WW2/ Country/ )

 Ionized air flood system, foot operated.

 Swab (HUBY-340CA-003)

(http:/ / www.cleancross.net/ modules/ xfsection/ article.php?articleid=24)

 Single drop bottle (FD-2-ESD)

 E2 (Eclipse optic cleaning system (www.photosol.com)

Procedure

 Use localized ionized air flow on to the glass during sensor cleaning.

 Blow off mobile contamination using an ionized air gun.

 Place the sensor under the microscope at a magnification of 5x to determine the

location of any remaining contamination.

 Clean the contamination on the sensor using one drop of E2 on a swab.

 Wipe the swab from left to right ( or right to left but only in one direction). Do this in

an overlapping pattern, turning the swab after the first wipe and with each

subsequent wipe. Avoid swiping back and forth with the same swab in order to

ensure that particles are removed and not simply transferred to a new location on the

sensor window. This procedure requires you to use multiple swabs.

 Discard the swab after both sides of the swab have been used once.

 Repeat until there is no visible contamination present.

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Dalsa 1M60 User Manual Page 34

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