Beam deflection control method based on liquid crystal phased array

Chunyang, 王春阳 Wang; Lan-ting, 李兰婷 Li; Hongwei, 史红伟 Shi; Qi-feng, 牛启凤 Niu

doi:10.3788/yjyxs20183310.0857

Cited by 3 publications

(1 citation statement)

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“…Although the resolution problem has improved, the tracking accuracy is not guaranteed. Wang Chunyang et al 14 proposed a beam deflection control loop control accuracy method, which can make the closed-loop bandwidth of the system reach 7.67 rad/s. In addition to tracking accuracy, pointing accuracy is also one of the most important indicators of photoelectric tracking.…”

Section: Introductionmentioning

confidence: 99%

Non-mechanical photoelectric tracking technology using liquid crystal phased array

Zhang

Jiang

Liu

et al. 2023

Advanced Optical Manufacturing Technologies and Applications 2022; And 2nd International Forum of Young Scientists on Advanced

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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.

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Section: Introductionmentioning

confidence: 99%