A polarization insensitive infrared filter based on a liquid-crystal Fabry-Perot for electrically tunable spectral imaging

Zhonglun Liu; Wanwan Dai; Xinjie Han; Zhaowei Xin; Dong Wei; Xinyu Zhang; Haiwei Wang; Changsheng Xie

doi:10.1117/12.2505775

15 November 2018 A polarization insensitive infrared filter based on a liquid-crystal Fabry-Perot for electrically tunable spectral imaging

Zhonglun Liu, Wanwan Dai, Xinjie Han, Zhaowei Xin, Dong Wei, Xinyu Zhang, Haiwei Wang, Changsheng Xie

Author Affiliations +

Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 109642H (2018) https://doi.org/10.1117/12.2505775
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China

Abstract

This paper presents a polarization insensitive infrared filter based on a liquid-crystal Fabry-Perot (LC-FP) developed for electrically tunable spectrum and performing high efficient imaging detection. Generally, the LC-FP filters are polarization sensitive optical devices, which means that filtering effect will be enormously influenced by ray polarization so as to lead to a low utilizing efficiency of incident energy. Therefore, it is of great significance to find an approach to improve or even solve the problem. The new type of infrared filter designed by us is mainly consists of a FP resonant cavity with a layer of zinc selenide (ZnSe) material as its substrate and a thin film of nano-aluminum (Al) material acting as its electrode and high-reflection mirror. Particularly, compared to the common filters, it has a multi-directional layer of ployimide (PI) film which can make the LC distributed along two mutually perpendicular directions so that the incident infrared light in different polarization orientations are able to be modulated. The experiment results indicate that the filter’s polarization insensitivity is substantially improved, thus it can work well in various polarized infrared radiations, and obviously will have a broader prospect of application.

Citation Download Citation

Zhonglun Liu, Wanwan Dai, Xinjie Han, Zhaowei Xin, Dong Wei, Xinyu Zhang, Haiwei Wang, and Changsheng Xie "A polarization insensitive infrared filter based on a liquid-crystal Fabry-Perot for electrically tunable spectral imaging", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109642H (15 November 2018); https://doi.org/10.1117/12.2505775

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available