Mr. Md Sakhawat Himel Profile

Md Sakhawat Himel

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Proceedings Article | 29 September 2023 Paper

Electrically tunable chiral liquid crystal lens arrays

Kelum Perera, Nilanthi Haputhantrige, Md Sakhawat Hossain Himel, Md Mostafa, Alex Adaka, Oleg Lavrentovich, Antal Jákli

Proceedings Volume 12658, 1265808 (2023) https://doi.org/10.1117/12.2676160

KEYWORDS: Liquid crystals, Electric fields, Polymers, Microlens, Electrodes, Glasses, Refractive index, Mixtures

Read Abstract +

Lenses with tunable focal lengths play important roles in nature as well as modern technologies. In recent years, the demand for electrically tunable lenses and lens arrays has grown, driven by the increasing interest in augmented and virtual reality, as well as sensing applications. In this paper, we present a novel type of electrically tunable microlens utilizing polymer-stabilized chiral ferroelectric nematic liquid crystal. The lens offers a fast response time (5ms) and the focal length can be tuned by applying an in-plane electric field. The electrically induced change in the lens shape, facilitated by the remarkable sensitivity of the chiral ferroelectric nematic to electric fields, enables the tunable focal length capability. The achieved performance of this lens represents a significant advancement compared to electrowetting-based liquid lenses and opens exciting prospects in various fields, including biomimetic optics, security printing, solar energy concentration, and AR/VR devices.

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