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1. 文华学院 信息科学与技术学部,湖北 武汉,430074
2. 武汉墨光科技有限公司,湖北 武汉,430074
收稿日期:2016-05-11,
修回日期:2016-06-12,
纸质出版日期:2016-11-14
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包佳祺, 刘祥彪, 俞侃. 长波通截止滤光片的消偏振设计[J]. 光学精密工程, 2016,24(10s): 82-86
BAO Jia-qi, LIU Xiang-biao, YU Kan. Design of non-polarization long-wave-pass edge filter[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 82-86
包佳祺, 刘祥彪, 俞侃. 长波通截止滤光片的消偏振设计[J]. 光学精密工程, 2016,24(10s): 82-86 DOI: 10.3788/OPE.20162413.0082.
BAO Jia-qi, LIU Xiang-biao, YU Kan. Design of non-polarization long-wave-pass edge filter[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 82-86 DOI: 10.3788/OPE.20162413.0082.
常规结构的薄膜干涉截止滤光片在倾斜入射时由于其P和S偏振光会产生明显的波长分离现象,导致其截止边带会出现严重的偏振相关损耗。本文基于TiO
2
和SiO
2
两种常规膜料设计了一种长波通干涉截止滤光片的消偏振膜系结构。通过在高折率间隔层的两侧添加不同厚度的低折射率材料作为匹配层,构建膜系评价函数并利用计算机自动寻优,得到了最优的膜系结构((H/2)4L2H4L(H/2))
15
。该截止滤光片在45°倾斜入射时3 dB位置的截止边带偏振波长分离小于2 nm通带透射率超过92%,偏振敏感性得到了有效的抑制。利用该算法和膜系结构可以较为容易地设计和制备消偏振的长波通干涉截止滤光片。
An oblique incidence on the conventional film interference cut-off filter will result in an obvious phenomenon of wavelength separation due to its P and S polarized lights
thus leading to serious polarization dependent loss in the cut-off band. Based on two ordinary film materials TiO
2
and SiO
2
this paper designs a depolarized stack structure for the long wave-pass interference cut-off filter through adding low refractive material with different thicknesses as matching layers above and under the high refractive layer. The algorithm for stack calculation was proposed and operated on a computer
thereby obtaining an optimal stack structure of ((H/2)4L2H4L(H/2))
15
. The stack enables the cut-off filter to achieve a polarization wavelength separation less than 2 nm in the cut-off sideband and a bandpass transmittance over 92% when the filter is in the position of 3 dB with an oblique incidence angel of 45°. Using the algorithm and the stack
the depolarized long-wave-pass interference edge filter can be easily designed and fabricated.
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王翀,罗斌,潘炜. 角度调谐滤光片偏振控制的间隔层折射率寻优算法研究[J]. 光学学报, 2005, 25(5):707-711. WANG C, LUO B, PAN W. Algorithm of seeking precise refractive index value of spacer for controlling angle tuned filter' polarization characteristics[J]. Acta Optica Sinica, 2005, 25(5):707-711. (in Chinese)
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刘华松,姜承慧,王利栓, 等. 热处理对离子束溅射Ta2O5薄膜特性的影响[J]. 光学精密工程,2014,22(10):2645-2651. LIU H S,JIANG CH H,WANG L SH, et al.. Effects of annealing on properties of Ta2O5 thin films deposited by ion beam sputtering[J]. Opt. Precision Eng., 2014, 22(10):2645-2651. (in Chinese)
俞侃,包佳祺. 基于等效层理论的薄膜滤光片中心波长消偏振膜系设计[J]. 光学精密工程,2016,24(1):45-49. YU K, BAO J Q. Design of thin film filter central wavelength depolarization stack based on equivalent layers theory[J]. Opt. Precision Eng., 2016, 24(1):45-49. (in Chinese)
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