稀土红外增透膜的研究进展

Research Progress of Rare Earth Infrared Anti-reflection Films

随着红外技术的发展,对红外光学系统提出了越来越高的要求。为了减少红外光学元件表面的反射光损失,同时对基底材料进行保护,需要在其表面镀制单层或多层增透膜。稀土氧化物、稀土氟化物和稀土掺杂化合物具有优异的光学透过性能、抗氧化性能及良好的机械性能,作为增透保护膜应用在红外光学器件中,对航空工业和国防科技的发展发挥着重要作用。简述了单层和多层增透膜系的原理和设计,介绍了常用的膜系优化设计软件,探讨了稀土红外增透膜常见的制备方法。追踪了国内外近年来稀土氧化物、稀土氟化物和稀土掺杂化合物作为红外增透膜在红外窗口、飞行器整流罩、太阳能电池、激光系统和现代光学器件等领域的研究和应用。最后对稀土红外增透膜材料的选择开发、应用前景和制备技术的发展趋势进行了展望,为今后在红外光学器件中能更好的应用稀土增透膜提供参考。

With the development of infrared technology, higher requirements are put forward for infrared optical systems. In order to reduce the reflected light loss on the surface of infrared optical elements and protect the substrate materials, single or multi-layer anti-reflection films should be coated. As anti-reflection and protection films applied in infrared optical elements, rare earth oxides, fluorides and doped compounds which have excellent optical properties, antioxidative property and good mechanical properties, play important roles in the development of aviation industry and national defense science and technology. The principles and design of single and multi-layer anti-reflection films and the common optimization design softwares were introduced in this review, the common preparation methods of rare earth infrared anti-reflection films were also discussed. The research and applications of rare earth oxides, rare earth fluorides and rare earth doped compounds as infrared anti-reflection films applied in infrared windows, aircraft fairing, solar cells, laser systems and modern optical devices were reviewed. Finally, the choice and application prospect of rare earth infrared anti-reflection materials and the development trend of preparation technologies were prospected, which could provide reference for the better application of rare earth anti-reflection film in infrared optical elements in the future.