Allied Vision Goldeye G, Техническое руководство

Страница: 128 / 136

120 Goldeye G Technical Manual V 2.0.0
Camera cleaning
Do not confuse a contamination 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.
Where is the contamination? — Locating
contaminations
Before dismounting the lens you should determine whether the contamination is
situated on the filter, lens, or sensor. To do so, capture a uniform image (e.g., a
white sheet of paper) with the camera. The affected optical surface is identified
when optical component in question is moved (rotated) and the dirt follows this
movement.
•
If you rotate only the lens (not the camera) and the contamination moves as
well, the contamination is on the lens.
• If you move the filter or protection glass window and the contamination moves
as well, the contamination is on the filter or protection glass.
• If the contamination is neither on the lens nor the filter or protection glass, it is
probably on the sensor.
Removing filter / protection glass
Take special care when removing the filter or protection.
• Removing the filter from the camera requires special care.
• If a special mounting tool is required, you must use this tool. Do not use any
makeshift tool.
• Ask your distributor for assistance if you are not confident with the procedure.
• Never touch optical surfaces with bare hands
Many cameras are not fitted with a protection glass.
Removing the lens or dust cap on these cameras immediately expose the sensor.
Always ensure that you are not inadvertently damaging the sensor surface.