Abstract

In the far-ultraviolet (UV) region, optical materials are dispersive and absorbing. The previous successful design method utilized in the visible band should be re-examined. We report on the design and fabrication of a far-UV reflective broadband filter based on dielectric materials lanthanum fluoride (LaF₃) and magnesium fluoride (MgF₂). Extended bandwidth technology is utilized in designing this filter. The obtained filter has a high reflectance in the working wavelength range of 140–180 nm, meanwhile, with good suppression in shorter and longer wavelength regions. In 2016, this filter was employed in a wide-angle aurora imager (WAAI) installed in the Feng Yun III satellite that will be launched in China.

© 2018 The Author(s)

Far ultraviolet mirrors for aurora imaging: design and fabrication

Xiaodong Wang, Peng Zhou, Shuai Ren, Xinkai Li, Haifeng Wang, Xin Zheng, and Bo Chen
Appl. Opt. 62(10) 2629-2635 (2023)

Far-UV reflectance and stress of narrowband AlF₃/LaF₃ multilayers

Paloma López-Reyes, Carlos Honrado-Benítez, Nuria Gutiérrez-Luna, Álvaro Ríos-Fernández, Luis V. Rodríguez-de Marcos, and Juan I. Larruquert
Opt. Mater. Express 12(2) 489-502 (2022)

Radiation damage effects in far-ultraviolet filters, thin films, and substrates

Charles E. Keffer, Marsha R. Torr, Muamer Zukic, James F. Spann, Douglas G. Torr, and Jongmin Kim
Appl. Opt. 33(25) 6041-6045 (1994)

Fluoride coatings for vacuum ultraviolet reflection filters

Chun Guo, Mingdong Kong, Dawei Lin, and Bincheng Li
Appl. Opt. 54(35) 10498-10503 (2015)

Design and fabrication of a novel reflection filter

Xuezheng Sun, Peifu Gu, Weidong Shen, Xu Liu, Yuan Wang, and Yueguang Zhang
Appl. Opt. 46(15) 2899-2902 (2007)