【摘要】 研究了紫外领域常用的6种大带隙的氟化物薄膜材料,在氟化镁单晶基底上用热舟蒸发镀制了三种高折射率材料薄膜LaF3,NdF3,GdF3和三种低折射率材料薄膜MgF2,AlF3,Na3AlF6;用商用lambda900光谱仪测量了它们在190—500 nm范围的透射率光谱曲线;用包络法研究了它们的折射率和消光系数,研究了影响透射率和光学常数的主要因素,给出了6种氟化物材料的光学常数公式和光谱色散曲线,为紫外技术与应用研究提供了参考.更多还原

【Abstract】 High-refractive-index materials such as LaF₃,NdF₃ and GdF₃ and low-refractive-index materials such as MgF₂,AlF₃ and Na₃AlF₆ single thin films are deposited by a resistive-heating boat at different deposited rates and specific substrate temperatures on single crystal MgF₂ substrate.Transmittances of all fluoride thin films are measured through commercial spectrometer in the ambient atmosphere.Optical constants of these films are determined by the envelope method and the factors effecting optical constants are studied.Result of this work may play an important role in the design and manufacture of cost-effective,mechanically and optically stable optical coatings for the VUV region.更多还原