Solar blind pyrometry Sample Clauses

Solar blind pyrometry. ‌ If the equipment for which we want to know the temperature is irradiated by concentrated solar energy, the aforementioned instrument will measure both the self-emitted light from the equipment and reflected concentrated solar light. This is true even for apparently non-reflective materials or cavities (except if completely designed as a black body). If the intensity of the self-emitted light is relatively low even the poorly reflected intense incoming concentrating light can dominate it. For such conditions, the wavelength for the measurements must be chosen for which there is no or little concentrated solar light. This is the case either in Earth’s or Sun’s atmosphere absorption bands, or on the concentrating optical system absorption. bands as illustrated in Figure 10. Such measurements are called solar-blind as they don’t see solar radiation per design.