Cleaning optical components
70
Bonito PRO Technical Manual V1.0.0
Identifying impurities
If you observe any image artifacts in your video preview of your Bonito PRO camera
you may have impurities either on the lens, optical filter, or on the sensor
protection glass. Every Bonito PRO camera is cleaned prior to sealing and
shipment; however, impurities may develop due to handling or unclean
environments.
As shown in the following figure, impurities (dust, particles or fluids) on the sensor
or optical components appear as a dark area, patch or spot on the image and
remain fixed in the preview window while you rotate the camera over the target.
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 should find out if 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 if the contamination follows this movement.
a.
If you move only the lens (not the camera) and the impurity moves as
well, the impurity is on the lens.
b.
If 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. If the impurity is neither on the
lens nor the IR cut filter or protection glass, it is probably on the sensor.
Figure 36: Image with tiny dust on the filter (left) and dust on the sensor (right)
NOTICE
Removing the optical filter
Do not attempt to remove the camera optical filter for Bonito PRO cameras.
Contact
for assistance.
