Non-mechanical photoelectric tracking technology using liquid crystal phased array

Yi Zhang; Huilin Jiang; Yang Liu; Yansong Song; Yan Dong; Lun Jiang

doi:10.1117/12.2655376

9 January 2023 Non-mechanical photoelectric tracking technology using liquid crystal phased array

Yi Zhang, Huilin Jiang, Yang Liu, Yansong Song, Yan Dong, Lun Jiang

Proceedings Volume 12507, Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022); 1250712 (2023) https://doi.org/10.1117/12.2655376
Event: 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022), 2022, Changchun, China

Abstract

A non-mechanical photoelectric tracking technology based on liquid crystal phased array was proposed. A mathematical model of a liquid crystal phased array photoelectric tracking closed-loop system was established. The laser emits incident light of a specified wavelength. Incident light enters the liquid crystal phased array through polarizers, waveplates and other optical devices. The difference between the deflected beam and the incident light is received with the camera after the liquid crystal phased array. The liquid crystal phased array adopts voltage control to achieve the deflection of the incident beam and achieve the purpose of accurate tracking. The motion state of the simulated target is analyzed and a modern control algorithm is designed. Subsequent simulations and experiments were conducted. Simulation results show that the dynamic tracking error of the liquid crystal photoelectric tracking system is better than 18μrad. Its closed-loop bandwidth exceeds 2.3HZ. On the basis of the above work, a desktop demonstration experiment platform was built. Experimental results show that the dynamic tracking error of the liquid crystal tracking control system is better than 20μrad, which has good robustness.

Citation Download Citation

Yi Zhang, Huilin Jiang, Yang Liu, Yansong Song, Yan Dong, and Lun Jiang "Non-mechanical photoelectric tracking technology using liquid crystal phased array", Proc. SPIE 12507, Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2022), 1250712 (9 January 2023); https://doi.org/10.1117/12.2655376

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KEYWORDS

Liquid crystals

Phased arrays

Control systems

Detection and tracking algorithms

Fuzzy logic

Electrodes

Molecules

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