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摘要:当前反卫星 武器发展迅猛，迫切需要研究和发展卫星的 防护技术，以增强卫星在空间的生存与防护能力。本文采用可见光-近红外透明和中波吸收的玻璃基底与线性 防护薄膜相结合的设计方法，在玻璃基板一面设计分光膜，实现1.315 μm波长的反射和0.5~0.8 μm、1.55 μm波段的增透，在玻璃基板另一面设计双波段减反射膜，实现0.5~0.8 μm和1.55 μm波段的增透。采用离子束溅射沉积技术，实现了 防护窗口薄膜的制备，在0.5~0.8 μm的平均透过率大于96%，1.55 μm的透过率大于98%，1.315 μm的透过率小于0.1%，在2.7 μm的透过率为30%，在3.8 μm的透过率为1.1%。实验结果表明，该方法实现了可见光-近红外-中红外波段 防护窗口的制备，对于卫星平台防护 武器具有重要作用。Abstract:In view of the current development of anti-satellite laser weapons, it is urgent to study and develop laser protection technology of satellites to enhance their survival and protection capabilities in space. In this paper, a glass substrate with transparency in the visible to near infrared wavelengths and absorption in middle infrared wavelengths was chosen, and a linear laser protective film was designed on its two sides. A beam splitter was designed on one side of the substrate and could achieve high reflectivity at a 1.315 μm wavelength and antireflection in 0.5~0.8 μm and 1.55 μm wavelength. Dual-band antireflection film was designed on the other side of the glass substrate and could achieve antireflection in 0.5~0.8 μm and 1.55 μm wavelengths. Using ion beam sputtering deposition technology, a laser protective film window was prepared, achieving the transmittance greater than 96% at 0.5~0.8 μm, greater than 98% at 1.55 μm, less than 0.1% at 1.315 μm, 30% at 2.7 μm and 1.1% at 3.8 μm. The experimental results show that this method is effective in the preparation of laser protection windows in the near-visible mid-infrared band and is very important in the protection of the satellite platforms from laser weapons.
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图 1Ta2O5薄膜和SiO2薄膜的可见光-近红外透过率曲线
Figure 1.Transmittance curves of Ta2O5and SiO2films in the range from visible to near infrared wave band
图 2Ta2O5薄膜和SiO2薄膜的近红外-中红外透射率曲线
Figure 2.Transmittance curves of Ta2O5film and SiO2film in the range from near infrared to middle infrared wave band
图 4离子束溅射Ta2O5和SiO2薄膜的折射率曲线
Figure 4.Refractive index curves of Ta2O5and SiO2films prepared by IBS
图 6双波段减反射薄膜和三波段分光薄膜的理论设计透过率曲线
Figure 6.Theoretical design transmittance curve of two-band antireflective film and three band spectroscopic thin film
图 7线性 防护窗口的理论设计透过率曲线
Figure 7.Theoretical design transmittance curve of linear laser protection window
图 8线性 防护窗口薄膜的可见光-近红外透射曲线
Figure 8.Measured visible-near infrared transmission curve of linear laser protective window
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