Beam Deflection Control Technology Based on Liquid Crystal Spatial Light Modulator

He, 杨 赫 Yang; Shoufeng, 佟首峰 Tong; Lei, 张雷 Zhang; Shuai, 常帅 Chang; Yansong, 宋延嵩 Song; Xin, 赵馨 Zhao; Xinkun, 范新坤 Fan

doi:10.3788/lop54.110603

Cited by 3 publications

(3 citation statements)

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“…x and s y are the pixel coordinates of the SLM; α and β determine the tilted angle. The illumination angle in the x direction is changed by controlling the value of β, and similarly, the illumination angle in the y direction is changed by controlling the value of α, so that the oblique stripes loaded on the SLM can change the illumination angle in the oblique direction [20][21] . The period of the fringes determines the angular change of the illumination beam, a small period represents a large angular change, and when loaded with a uniform gray value, the SLM functions like a mirror.…”

Section: Principlementioning

confidence: 99%

“…In this study, we propose a single-shot ptychography approach using a phase-only spatial light modulator. In order to realize multi-angle modulation, four different grey images are loaded in different quadrants of the modulator, which changes the intensity of the electric field in the liquid crystal layer and thereafter generates a specific phase delay 18 .…”

Section: Introductionmentioning

confidence: 99%

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Single-shot ptychography based on spatial light modulator multi-angle modulation

Liu

Rong

Lin

et al. 2022

Thirteenth International Conference on Information Optics and Photonics (CIOP 2022)

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Ptychography is a lensless, wide-field, diffraction imaging method that can reconstruct the object transmittance function and the probe distribution simultaneously. Traditionally, lateral mechanical movement is necessary in the time-consuming data acquisition process, resulting in disability to investigate dynamic phenomena. Single-shot ptychography is therefore proposed which divides the incident light into multiple tilted sub-probes through a beam splitting element, e.g., pinhole array and Dammann grating, meanwhile the diffraction patterns are recorded simultaneously in spatial multiplexing mode. In this study, we propose a single-shot ptychography approach using a phase-only spatial light modulator. In order to realize multi-angle modulation, four different grey images are loaded in different quadrants of the modulator, which generates a specific phase delay. Considering the inconsistent wavefront of the probe beams, multi-mode ptychographic algorithm is also adopted which treats probe beams differently. The proposed method is expected to promote single-shot ptychography for piratical applications.

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Section: Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Single-shot ptychography based on spatial light modulator multi-angle modulation

Liu

Rong

Lin

et al. 2022

Thirteenth International Conference on Information Optics and Photonics (CIOP 2022)

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“…To a certain extent, the pointing accuracy of the beam directly determines the performance of liquid crystal devices. Yang He et al 15 of Changchun University of Science and Technology have built an experimental system to solve the problem of low deflection angle by using a silicon-based liquid crystal space light modulator with a pixel count of 1920×1080 for the intelligent control of non-mechanical beams based on liquid crystal space modulators. This paper describes the liquid crystal phased array.…”

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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Simulation of beam steering control in arrayed liquid prisms system based on electrowetting-on-dielectric

Zhang

Zhao

Kong

et al. 2020

Optoelectron. Lett.

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Beam Deflection Control Technology Based on Liquid Crystal Spatial Light Modulator

Cited by 3 publications

References 0 publications

Single-shot ptychography based on spatial light modulator multi-angle modulation

Single-shot ptychography based on spatial light modulator multi-angle modulation

Non-mechanical photoelectric tracking technology using liquid crystal phased array

Simulation of beam steering control in arrayed liquid prisms system based on electrowetting-on-dielectric

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