Study of Dual-band Cut-off for Edge Filter

CAO Jing-hui; SU Zhou-ping; HU Ying; HU Li-fa; ZHU Hua-xin

doi:10.3788/fgxb20173812.1675

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Study of Dual-band Cut-off for Edge Filter

更新时间：2020-08-12

- Study of Dual-band Cut-off for Edge Filter
- Chinese Journal of Luminescence Vol. 38, Issue 12, Pages: 1675-1680(2017)
- 作者机构：
  
  江南大学理学院江苏省轻工光电工程技术研究中心, 江苏无锡 214122
- 作者简介：
- 基金信息：
  
  Supported by Shanghai Solid State Laser and Applied Technology Key Laboratory Open T
- DOI：10.3788/fgxb20173812.1675
  CLC： O484
- Received：04 June 2017，
  
  Revised：22 July 2017，
  
  Published：05 December 2017
- 稿件说明：
移动端阅览
曹晶辉, 苏宙平, 胡莹等. 双波段截止分色滤光片研究[J]. 发光学报, 2017,38(12): 1675-1680

CAO Jing-hui, SU Zhou-ping, HU Ying etc. Study of Dual-band Cut-off for Edge Filter[J]. Chinese Journal of Luminescence, 2017,38(12): 1675-1680
曹晶辉, 苏宙平, 胡莹等. 双波段截止分色滤光片研究[J]. 发光学报, 2017,38(12): 1675-1680 DOI： 10.3788/fgxb20173812.1675.

CAO Jing-hui, SU Zhou-ping, HU Ying etc. Study of Dual-band Cut-off for Edge Filter[J]. Chinese Journal of Luminescence, 2017,38(12): 1675-1680 DOI： 10.3788/fgxb20173812.1675.

摘要

为实现45入射情况下K9基底上双波段截止分色的特性（截止带波长0.5~0.68 m、0.73~0.79 m，通带波长0.83~0.87 m），采用F-P型的带通滤光片膜系结构为初始结构，与常规设计理念相比有效减少了膜层的数量，薄膜的高折材料采用TiO

，低折材料采用SiO

，以实现双波段截止的目的。膜层的设计层数为23层，总厚度为2.278 m，借助电子束蒸发物理气相沉积法实现了镀制，利用分光光度计对镀制样品的透过率进行评估。测试结果显示，截止区（0.5~0.68 m和0.73~0.79 m）平均截止深度分别达到了12.57%和20.39%，通带0.83~0.87 m波段内的平均透过率达到了91.35%，样品测试曲线与设计相比，"蓝移"将近10 nm。薄膜样品基本实现了设计目标，具有双波段截止、高通带透过率的特性。在环境测试中：薄膜表现出显著的稳定性，膜层间匹配度适宜。该双波段截止分色滤光片能够应用在一些极端的情况下。

Abstract

To realize the characters of a dual-band filter that selectively transmit light of wavelengths of 0.83-0.87 m but cut off the wavelengths of 0.5-0.68 m and 0.73-0.79 m on a 45 incident angle on K9 substrate

a type of F-P bandpass filter was chosen to be the initial structure which effectively reduce the number of the thin film compared with the routine design concept. The high index material of titanium oxide (TiO

) and the low index material of silicon oxide (SiO

) were used during the course. The thickness of 23 layers was 2.278 m. The electron beam physical vapor deposition (EBPVD) was used to fabricate the coatings. The transmittance of the sample was measured by using the spectrophotometer. The average cutoff depth is 12.57% and 20.39% corresponded to the band from 0.5 m to 0.68 m and the band from 0.73 m to 0.79 m respectively from the test result. The average transmittance is up to 91.35% for the pass band from 0.83 m to 0.87 m. It appears almost the same with the designing result that the figure of transmittance shifts to the short wavelength by 10 nm. Beyond this

the edge filter cuts off in dual-band and gets the high transmittance in pass band. In the environmental tests

the coatings match well with each other which is remarkably stable. So

the dual-band cut-off edge filter can be applied in extreme cases.

关键词

Keywords

references

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