Recently, a long-life barycenter location energy detecting optical system developed by our institute won the invention patent license with patent No. ZL201010583699.0. The system is mainly applied to kinds of space orbital long-life satellite, reactor, hot cell and circumstances with strong radioactivity.

In the present aerospace field, especially in the aspect of high orbit satellite attitude control, in order to correct the flight path deviation of the detector, measure the detector attitude and perform pointing control to the solar panels and pay load, the star sensor is required to secure the orbit stability during the flight and a certain flight attitude. In terms of the middle and high orbit satellites, the star sensor which can serve at the high and middle orbit for 10 years or more, or even 25 years is specially needed. Due to the harsh working environment and high demand of precision, quality and service-life, the techniques involved are especially difficult and no such optical system is invented in the our country yet. Also, due to the harsh space environment in high orbit, once the general optical system is irradiated chronically by the space particles, the transmittance of the whole system would decay fast or even become light-proof. In this case, the satellite control system would not able to detect effective fixed star, which would invalidate the whole star control system, and it could not provide long-tem and stable flight attitude control for the satellite system. The existing Barycenter Location Energy Detecting Optical Systems either have complicated structure with at least 7 optics or more or with 3 kinds of optical glass or more or could not serve for 10 years or more.

In view of this problem, Wang Hu and Liu Jie of our institute have developed a Long-Life Barycenter Location Energy Detecting Optical System, which solves the difficulties that the traditional optical systems hardly work stably, precisely in the rugged electromagnetic environment for long time. The optical system includes 1st positive lens, 2nd positive lens, 2nd positive lens, 1st negative lens, diaphragm, 3rd positive lens, 4th positive lens and 2nd negative lens which are setting up on the same light path in sequence along the direction of the incident light. All these six lenses are radiation-resistant and their focal distance, radius of curvature and refractive index are designed. This optical system is especially for the application of the long-life satellite in different space orbits. It could serve for 10 years or more, or even 25 years, which could correct the system aberrations better, form smaller defocused spots and colourbias, adapt the environmental temperature better and produce high transmittance.