空间原子氧对保偏反射镜偏振对比度的影响
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摘要
选择金属膜层材料Ag和Ta_2O_5、SiO_2、Al_2O_3等多种介质薄膜材料,在石英基底上设计和制备了保偏反射镜,其在810 nm和850 nm波长处的偏振对比度优于10000∶1。结合保偏反射镜所处的轨道环境,进行了原子氧模拟实验,研究了保偏反射镜样品偏振对比度的变化规律。结果表明,随着原子氧剂量的增加,保偏反射镜的偏振对比度呈衰减趋势,且+45°、-45°方向的衰减较水平(H)、垂直(V)方向的更明显。
The metal coating material of Ag and dielectric thin film materials such as Ta_2O_5, SiO_2 and Al_2O_3 are selected for designing and fabricating a kind of polarization-maintaining mirror on the quartz substrate, whose polarization contrasts at wavelengths of 810 nm and 850 nm are superior to 10000∶1. With the combination of the orbital environment for the polarization-maintaining mirror, the experiment for simulating the spatial atomic oxygen is conducted and the change law of polarization contrast of the polarization-maintaining mirror sample is investigated. The results show that, with the increase of the dose of the atomic oxygen, the polarization contrast of the polarization-maintaining mirror shows an overall decreasing trend. Moreover, the decreasing trends along the directions of +45° and-45° are more obvious than those along the horizontal(H) and vertical(V) directions.
The metal coating material of Ag and dielectric thin film materials such as Ta_2O_5, SiO_2 and Al_2O_3 are selected for designing and fabricating a kind of polarization-maintaining mirror on the quartz substrate, whose polarization contrasts at wavelengths of 810 nm and 850 nm are superior to 10000∶1. With the combination of the orbital environment for the polarization-maintaining mirror, the experiment for simulating the spatial atomic oxygen is conducted and the change law of polarization contrast of the polarization-maintaining mirror sample is investigated. The results show that, with the increase of the dose of the atomic oxygen, the polarization contrast of the polarization-maintaining mirror shows an overall decreasing trend. Moreover, the decreasing trends along the directions of +45° and-45° are more obvious than those along the horizontal(H) and vertical(V) directions.
引文
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[2] Macleod H A. Thin-film optical filters[M]. Tucson: CRC Press, 1999.
[3] Zhong D S. Vacuum deposition[M]. Shenyang: Liaoning University Press, 2001. 钟迪生. 真空镀膜[M]. 沈阳: 辽宁大学出版社, 2001.
[4] Duan W B, Liu D Q, Zhang F S. Study on optical properties of two thin film materials in medium-wave infrared band[J]. Acta Optica Sinica, 2009, 29(s1): 177-180. 段微波, 刘定权, 张凤山. 两种中波红外薄膜材料的光学特性研究[J]. 光学学报, 2009, 29(s1): 177-180.
[5] Wang S W, Liu D Q, Lin B, et al. Realization of integrated narrow bandpass filters in the infrared region[J]. International Journal of Infrared and Millimeter Waves, 2004, 25(11): 1677-1683.
[6] Zhu W M. Atomic oxygen environment and its testing research[J]. Spacecraft Environment Engineering, 2002, 19(4): 6-12. 朱文明. 原子氧环境及其实验研究[J]. 航天器环境工程, 2002, 19(4): 6-12.
[7] Lu E, Yan C X, Wu Q W, et al. Research on adaptability of optical remote sensors in mechanical and space thermal environments[J]. Chinese Journal of Optics and Applied Optics, 2009, 2(5): 364-376. 卢锷, 颜昌翔, 吴清文, 等. 空间光学遥感器环境适应性设计与实验研究[J]. 中国光学与应用光学, 2009, 2(5): 364-376.
[8] Samwel S W. Low earth orbital atomic oxygen erosion effect on spacecraft materials[J]. Space Research Journal, 2014, 7(1): 1-13.
[9] Shuvalov V A, Kochubei G S, Priimak A I, et al. Changes of properties of the materials of spacecraft solar arrays under the action of atomic oxygen[J]. Cosmic Research, 2007, 45(4): 294-304.