Allied Vision Goldeye G, Техническое руководство

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Temperature control
107 Goldeye G Technical Manual V 2.0.0
For the Goldeye G, three or four setpoints are defined, depending on the cam ‐
era model.
2. If the absolute temperature of the sensor is reduced, this decreases the dark
current, thus further increasing the dynamic range of the camera.
Temperature control of the sensor is accomplished in multiple ways:
• All Cameras of the Goldeye family are equipped with thermoelectric cooling
(TEC) to keep the sensor at a stable temperature that is lower than the ambient
temperature.
• The specially designed Goldeye housing dissipates the heat build ‐ up inside the
camera and radiates the heat into the environment.
• In addition, Goldeye Cool cameras are equipped with a two ‐ stage thermoelec ‐
tric cooling (TEC2). This allows to operate the sensor at a very low tempera ‐
ture, thus keeping a higher image quality even with longer exposures.
• To actively dissipate the heat that builds up internally, Goldeye G Cool cameras
are equipped with a fan.
Neutralization of the temperature influence
To neutralize the temperature influence on the non ‐ uniformity, the TEC element
keeps the sensor temperature at predefined setpoints. For each setpoint, a set of
correction data is applied to the output signal. This correction data set is
predetermined for each camera individually, and is uploaded into the camera after
manufacturing.
Reduce power consumption of the camera
Reducing the camera‘s operating temperature can reduce its typical power con ‐
sumption significantly for a given temperature setpoint.
The TEC works more efficiently if the temperature difference between the cool side
and the warm side of the TEC is decreased.
Goldeye G ‐ 032 Cool: Do not cover the fan outlet
Always ensure that a free flow of air from the fan outlet on the camera top is possi ‐
ble.
Obstructing the air flow may result in an early and unnecessary shut ‐ down of the
camera.
Use a heat sink to reduce camera temperature
To improve the cooling capability of the Goldeye standard models, a heat sink set
can be mounted to the camera. Up to four heat sinks can be fitted to one camera.
The heat sink set for Goldeye G Cameras is available from Allied Vision under the
Allied Vision order number 1068300.