[1] Firoozifar S A R, Behjat A E, Kadivar S M B, et al. A study of the optical properties and adhesion of zinc sulfide anti-reflection thin film coated on a germanium substrate[J]. Applied Surface Science, 2011, 258: 818-821.

[3] YOHEI MATSUOKA, SYLVAIN MATHONNèIRE, SVEN PETERS, et al. Broadband multilayer anti-reflection coating for mid-infrared range from 7 .m to 12 .m [J]. Applied Optics, 2018, 57(7): 1645-1649.

[8] WANG Xiaodong, CHEN Bo, YAO Ling. Design and fabrication of far-ultraviolet reflective broadband filter based on dielectric materials[J]. Applied Spectroscopy, 2018, 72(6): 943-946.

[9] Won Tae, Seoung Jae IM, Jeon Geon HAN1, et al. LaF3/MgO protective layer in AC-Plasma display panels [J]. Jpn. J. Appl. Phys, 2003, 42(7A): 4501-4503.

[10] LI Bin, XIE Ping, SU Weitao, et al. Combinatorial synthesis of BaClF -ReF3 (Re=La, Pr, Er, Sm) layers with graded-index as anti- reflection coatings in the thermal infrared[J]. Materials & Design, 2016, 107: 302-310.

[12] Gainutdinov I S, Shuvalov N Yu, Sabirov R S, et al. Antireflection coatings on germanium and silicon substrates in the 3–5 .m and 8–12 .m windows of IR transparency[J]. J. Opt. Technol. 2009, 76(5): 302-305.