Đo nhiệt độ P9

Optical Systems All of the types of automatic pyrometers, listed in Section 8.1 and shown in Figure 8 .2 are considered in this chapter. To reach a sufficiently high measurement precision, the radiation emitted by the body under measurement is concentrated on the radiation detector by lenses, light-guides or mirrors . Thus, they also reduce the pyrometer viewing angle and consequently the necessary object diameter . It its also essential that the pyrometer optical system should be able to aim properly at the target . ...