Research On The Performance Effect Of Space Optical Communication Telescope System Caused By Temperature Field

Space optical communication system acts as a kind of communication technique totransfer the information by taking the laser beam as the carrier. Due to its manyadvantages: high transmission speed of data, good security, light weight, small volumeand wide application even in the complex geography, more attention has been paid by alarge number of countries. It’s extremely rapid development and a number of keytechnologies have been resolved. Space optical communication includes point-to-pointcommunication on the ground, satellite laser communication, deep-space opticalcommunication and so on.Reflecting telescope can be widely applied in space laser communication system.Telescopes have different thermal deformation in the different space environment.When a beam passing through the optical system, its quality will be changed. The aimof optical communications and communications performance will be affected. Therefore,studying the optical performance of impact of telescope in difference temperature fieldhas an important significance.This article first analyzes the development of the domestic and internationalthermal load on the mirror surface studies. Introduced mirror deformation on the mirrorimaging performance caused by the thermal load conditions and introduced the thermalelastic deformation theory. And then establishing an entity telescope model to analyzethe performance impact in different temperature field. Through finite element methodanalysis of the deformation of the mirror, then it was imported into Code V. Throughwhich we can analyze the performance of the optical system at different temperaturesfield. The specific work is as follows:This paper established a solid model of the telescope optical system. When theprimary and secondary mirror is microcrystalline material or K9, the base of the primarymirror is a titanium alloy, sub-frame is of hard steel, its optical system performance atdifference temperature field. Then analysis the system performance under the twocombinations. In addition, in contrast to the combination of different materials, researchon the performance impact at different temperatures field. At last, when the primary andsecondary mirror material is microcrystalline, the paper did experimental study.Research on the performance impact of the system at the ambient temperature fieldincreased and the higher the temperature of the primary mirror.Different materials, the price and the difficulty of processing is not the same. Thecontents of this article provides a reference to the selection of materials of primary and secondary mirror of the telescope structure under different ambient temperature.Therefore, this study has important significance.