Effects of Excessive Camera Temperatures
Generally speaking, the lower the temperature, the better the image quality. At higher temperatures, dark noise increases and as a result the image quality degrades. This is a typical phenomenon that is independent of the camera. This effect becomes noticeable when the sensor reaches temperatures above 40–50 °C, depending on the sensor and other factors.
Apart from reduced image quality, excessively high temperatures may damage the electronic components of the camera. Therefore, it is important to check the device temperature regularly (via the Device Temperature feature). This allows you to take protective measures in case of overheating.
Heat may be generated at several locations in the camera, e.g., at the imaging sensor, at the controllers for booting and data transfer, and especially at the image signal processor, which is needed for image preprocessing (color calculation, image enhancements, etc.) and system control.
Impact of the Frame Rate
As high frame rates increase the load on the sensor and the image processor, they also increase power consumption and the heat generated to a certain degree. However, the frame rate is only a single and minor factor when it comes to heat generation. Even if no images are acquired, there’s always a certain amount of power consumption. This is because many electronic components have a certain baseload and show a certain activity even if the frame rate is zero, e.g., to control data transfer to the host system, but also to control the imaging sensor and the processor.
Mono camera models have a lower power consumption than the corresponding color camera models. This is mainly due to color calculations (Debayering) that are performed on color cameras.
Effects of Using a Heat Sink
To prove the effectiveness of the heat sink for Basler ace 2 cameras, Basler carried out extensive tests.
During these tests, the cameras were suspended freely. This means that the camera and the heat sink weren’t attached to any physical frame. Also, no lens was mounted. This was done to achieve the most accurate results as anything attached to the camera has an influence on heat generation as well as heat dissipation.
The temperature measurement began after the camera had been connected to power and image acquisition had been started. The graphs show that by using a heat sink the temperature of the core board can be reduced by almost 25 °C.
Attaching the Heat Sink
1. Slot the ace 2 camera into the heat sink.
2. Use the screws included to secure the camera in the heat sink.