The function and characteristics of infrared hemispherical fairing
The fairing is a protective cover added to the outside of the payload in the infrared guided missile system. It is widely used in various rockets and missiles. As the protective cover at the forefront of the imaging system, the fairing must bear the aerodynamic load to protect the infrared optical system from the external environment (such as sand, rain, snow, sand, etc.) firstly. Secondly, the fairing must not affect the imaging and aberration correction of the optical system as much as possible. Sometimes, the fairing also needs target stealth and anti-missile technology. The spherical structure is the earliest structure adopted by the infrared fairing. Its characteristic is that the inner and outer surfaces are spherical. The centers of the spheres coincide, corresponding to the internal optical system. The spherical fairing is easy to process. The internal optical system is easy to design. During the imaging process, the aberration of the hemispherical fairing to the optical syst