Oculus PRO Colour Handbook Issue 1
The Oculus PRO Colour is designed to minimise any lens and dome dewing problems, but these are
very common in optical systems that are cooled by radiation to the sky. It is very likely that you will
have dewing on humid nights unless the dome is kept warm by powering the internal heater via the
12v socket on the rear of the assembly. This socket can accept a 2.1mm coaxial power plug from any
12v DC supply capable of driving at least 1 amp - the polarity is center positive. Heating will increase
the dark signal of the camera, so the dew sensing circuit is set to approximately 50% moisture
saturation in the air before turning on the dew heaters automatically.
A rear view of the Oculus PRO Colour, showing the heater socket and USB cable.