Design of First-Order 121.6 nm Minus Filters

被引：2

作者：

Wang, Xiaodong ^{[1
]}

Chen, Bo ^{[1
]}

Huo, Tonglin ^{[2
]}

Zhou, Hongjun ^{[2
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Appl Opt, Changchun 130033, Jilin, Peoples R China

[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei, Anhui, Peoples R China

来源：

APPLIED SPECTROSCOPY | 2018年 / 72卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Minus filter; narrowband; equivalent parameters function; lanthanum trifluoride; LaF3; magnesium fluoride; MgF2; TELESCOPE;

D O I：

10.1177/0003702818788828

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The equivalent parameters function in Macleod software can be used to calculate the equivalent admittance and phase thickness of multilayers, even when the material is both absorbing and dispersive, and the incidence angle is non-zero. We utilized this software to design first-order 121.6 nm minus filters based on a lanthanum trifluoride (LaF3)/magnesium fluoride (MgF2) multilayer; a Gaussian-type target curve was also introduced into the design. Minus filters with bandwidths of 10 and 5 nm were obtained and had good visible light suppression and low side-lobe ripples. This designed filter will be fabricated for use in a Lyman-alpha coronagraph and imager installed in the Lyman-Alpha Solar Telescope, which will be launched by China in 2021.

引用

页码：1498 / 1502

页数：5

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