Cleaning optical components
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Manta Technical Manual V8.0.1
Do not confuse this with a pixel defect which appears as a distinct point. Particles
can either rest loosely or can be more or less stuck to the optical surface.
Locating impurities
Before you dismount the lens you must find out whether the impurity is on the
filter, lens, or sensor.
1. Start acquiring a uniform image (for example, a white sheet of paper) with the
camera.
2. To identify the affected surface, move the suspected optical component and
see whether the contamination follows this movement.
a. When you move only the lens (not the camera) and the impurity moves as
well, the impurity is on the lens.
b. When you move the IR cut filter or protection glass window and the
impurity moves as well, the impurity is on the filter or protection glass.
Carefully remove the filter or protection glass and clean it on both sides
using the techniques explained in the next section.
Figure 129: Image with tiny dust on the filter (left) and dust on the sensor (right)
