Laser & Optoelectronics Progress, Volume. 60, Issue 19, 1923002(2023)
Tunable Fresnel Liquid Crystal Lens with Large Aperture
A liquid crystal lens is a type of optical lens that can be electronically focused without mechanical movement. This paper proposes a large-aperture liquid crystal lens that is divided into multiple Fresnel zones. To guarantee the optical power and response speed, the aperture of the liquid crystal lens is significantly improved to 1 cm. The Fresnel zones are connected and controlled by means of interdigital electrodes, and the driving voltage of each Fresnel zone is the same, which simplifies the driving method. The optical power of the newly proposed Fresnel liquid crystal lens can be controlled between -1.62D and +1.57D via the applied voltage. After the incident plane wave is modulated by the Fresnel liquid crystal lens, the wavefront is close to a parabolic distribution. This lens shows favorable optical characteristics. In this work, the lens is used as a focusing element in an imaging system for demonstration purposes.
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Zhenhao Huang, Zhiqiang Liu, Hongjun Lin, Mao Ye. Tunable Fresnel Liquid Crystal Lens with Large Aperture[J]. Laser & Optoelectronics Progress, 2023, 60(19): 1923002
Category: Optical Devices
Received: Apr. 9, 2022
Accepted: Jun. 13, 2022
Published Online: Sep. 28, 2023
The Author Email: Ye Mao (mao_ye@uestc.edu.cn)