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Cameras and imaging systems for industrial and manufacturing markets are traditionally manufactured for high throughput and image quality, often at the expense of speed, cost and system robustness. As a result, many system design challenges have emerged. A primary concern in camera system design is noise, or the camera’s signal-to-noise ratio (SNR): the ratio of the measured signal to the overall noise at a given pixel. High SNRs are particularly important in applications requiring precise measurement of light.
A fraction of light incident on the camera’s image sensor gets converted to photoelectrons within the silicon layer. Photoelectrons comprise the signal while carrying a statistical variation of fluctuations in the photon arrival rate at a given point, known as “photon noise.” Evaluate camera features by examining three general types of noise:
Some heat reduction procedures are achieved through the following:
TEC or Peltier coolers use a current flow to transport heat and are stacked together for excessive cooling, circulating liquid or air through a large fan.
In research grade cameras, combined TECs coupled to a liquid cooling system transfer heat away from the TEC. However, liquid cooling systems are generally not considered robust enough to be practical outside the realm of research cameras.