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AVT camera cleaning instructions
Is it an impurity? – Identifying impurities
Figure 2: Image with tiny dust on the filter (left) and dust on the sensor (right)
Where is the impurity? – Locating impurities
If you observe any image artefacts in your video preview of your AVT camera
you may have impurities either on the lens, filter/protection glass or, theo-
retically on the sensor protection glass, although every AVT camera gets
cleaned prior to sealing and shipment.
Impurities (dust, particles or fluids) on the sensor or optical components
(Figure 2: Image with tiny dust on the filter (left) and dust on the sensor
(right)
on page 20) will appear as a dark area, patch or spot on the image
and will remain fixed in the preview window while you rotate the camera over
the target.
Do not confuse this with a pixel defect which will appear as a distinct point.
It is crucial to differentiate between dust (e.g. flakes of skin, particles) and
other dirt (e.g. liquids, fingerprints, grease). Particles can either rest loosely
or can be more or less stuck to the optical surface.
Before you dismount the lens you should find out if the impurity is on the
filter, lens or sensor. Therefore you should record a uniform image (e.g. a
white sheet of paper) with the camera. The affected optical surface is iden-
tified when a suspected optical component is moved and the dirt follows this
movement.
1. If you move only the lens (not the camera) and the impurity moves as
well, the impurity is on the lens.
2. If you move the IR cut filter/protection glass window and the impurity
moves as well:
Please carefully remove the filter/protection glass and clean it on both
sides using the techniques explained below.
Manta Hardware Installation Guide V4.1.0
20
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