南极大型天文望远镜主镜膜层防霜方法  

Anti-Frosting Method for Primary Mirror Film Coating of Large Astronomical Telescope in Antarctica

作　　者：王晋峰[1,2] 王烨儒 田杰[1,2] 

机构地区：[1]中国科学院国家天文台南京天文光学技术研究所,江苏南京210042 [2]中国科学院天文光学技术重点实验室,江苏南京210042 [3]中国科学院大学,北京100049

出　　处：《光学学报》2017年第4期369-375,共7页Acta Optica Sinica

基　　金：国家自然科学基金(11103049)

摘　　要：我国将在南极建设2.5m光学红外望远镜KDUST,为了解决镜面结霜问题,提出了氧化铟锡(ITO)薄膜加热的防霜方法。利用该方法,密封透射结构的南极巡天望远镜(AST)已经成功地应用于南极冰穹A。讨论了ITO薄膜集成于反射膜系用于防霜的可行性、防霜反射镜的制备工艺以及防霜反射镜在不同加热功率下的面形变化情况。实验结果表明,集成了ITO薄膜的反射镜具有防霜功能且对镜面面形的影响较小,有望应用于南极大型反射式望远镜系统中。The 2.5-m optical infrared telescope KDUST will be built in Antarctica by our country. In order to solve the problem of mirror frosting, the anti-frosting method by heating the indium tin oxide （ITO） film is proposed. With this method, the Antarctic Survey Telescope （AST） with sealed transmission structure has successfully been applied at the Antarctic Dome A. The anti-frosting feasibility of ITO thin films integrated in the reflecting film system, the preparation process and the surface shape variation of the anti-frosting reflector at different heating powers are discussed. The experimental results show that the ITO thin film integrated reflector has anti-frosting ability and little influence on the shape of the reflector surface, which can be applied to the large telescope system with reflection configuration in Antarctica.

关 键 词：薄膜 防霜反射镜 氧化铟锡薄膜 南极2.5 m光学红外望远镜 

分 类 号：O484[理学—固体物理] P111.2[理学—物理]