A Solc liquid crystal tunable filter

Tingmei Yang; Minlong Lian; Dongliang Shi

doi:10.1117/12.2606148

24 November 2021 A Solc liquid crystal tunable filter

Tingmei Yang, Minlong Lian, Dongliang Shi

Proceedings Volume 12064, AOPC 2021: Optical Spectroscopy and Imaging; 120640C (2021) https://doi.org/10.1117/12.2606148
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

Liquid crystal tunable filter utilizes the electrically controlled birefringence effect of liquid crystal material to achieve rapid tuning of the central wavelength of the transmission spectrum. In this paper, we propose a fan Solc liquid crystal tunable filter with 8-stage structure, and the thickness of the nematic liquid crystal material in each liquid crystal cell is 3 μm. We compile a program according to Jones matrix calculation method to simulate and analyze the 8-stage Solc liquid crystal tunable filter. It can be clearly derived from the simulation results that this liquid crystal tunable filter can freely tune the center wavelength of the transmitted light in the spectral range of 400 nm to 800 nm. When the transmission peaks of the liquid crystal tunable filter are at 450 nm, 540 nm, 630 nm, and 750 nm, the full width at half maximum of the transmission spectrum are 45 nm, 54 nm, 63 nm, and 75 nm, respectively. What’s more, when the thickness of the liquid crystal material decreases from 10 μm to 6μm, the free spectral range of the 8-stage Solc liquid crystal tunable filter increases. We also performed a simulation experiment on 4, 8, 12 and 16-stage fan Solc liquid crystal tunable filters.The thickness of the liquid crystal material in these Solc-type liquid crystal tunable filters is still 3 μm. As the the number of stages of liquid crystal tunable filters increases, the full width at half maximum decreases gradually and is approximately inversely proportional.

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Tingmei Yang, Minlong Lian, and Dongliang Shi "A Solc liquid crystal tunable filter", Proc. SPIE 12064, AOPC 2021: Optical Spectroscopy and Imaging, 120640C (24 November 2021); https://doi.org/10.1117/12.2606148

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KEYWORDS

Liquid crystals

Tunable filters

Optical filters

Fluctuations and noise

Crystals

Birefringence

Multispectral imaging

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