CoolingAll high-quality microscope cameras are cooled,usually with electronic Peltier elements. In thiscontext, the heat generated by the electronicparts is actively removed from the chip. It iseither kept at a constant temperature, such as18°C, or maintained at a steady difference to theroom temperature. The goal of cooling is togenerate an image with lower noise.Cooling is necessary if receiving only lowsignal levels despite an exposure time longerthan 10 seconds. Only in this case, the effect ofcooling on the noise is significant.