Analytic solution of optical beam steering based on rotational double prisms

Yuan, 周远 Zhou; Ya-fei, 鲁亚飞 Lu; Mo, 黑沫 Hei; Fei-tuan, 熊飞湍 Xiong; Kai, 李凯 Li; Da-peng, 范大鹏 Fan

doi:10.3788/ope.20132106.1373

Cited by 5 publications

(1 citation statement)

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“…Paralleled mutuallyon the opposite surfaces,the achromatic prism 1  and theprimary prism 2  are fixed placed and rotate around the axis-Z with shared angle 1  . As Fig.2 shows, benefit from some known results [13], thesteered angle 1  of beampassing throughthe two prisms is represented as…”

Section: Methods Of Paraxial Approximationmentioning

confidence: 99%

Exact Analytic Formulae of Beam Pointing Based on Achromatic Risley Prisms

Zhou¹,

Li²,

Wang³

2016

Proceedings of the 2015 2nd International Forum on Electrical Engineering and Automation (IFEEA 2015)

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Abstract. The mathematic relationship between the given orientations of two-prism groups and the corresponding pointing position of outgoing beam is the basic prerequisite needed in applications of achromatic risley prisms to steer beam in free space. Based on vectorial law of refraction, this paper finishes the derivation of the analytic formulae of the relationship wanted. Then the test samplesobtained by the analytic formulae, the method of paraxial approximation and professional the optical software are compared respectively. The results prove the correctness of the analytic formulae, as well as its necessity and superiority in high-precision pointing solution when beam is steered over wide angular range.

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Section: Methods Of Paraxial Approximationmentioning

confidence: 99%

Exact Analytic Formulae of Beam Pointing Based on Achromatic Risley Prisms

Zhou¹,

Li²,

Wang³

2016

Proceedings of the 2015 2nd International Forum on Electrical Engineering and Automation (IFEEA 2015)

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Establishment and verification of formulas of target tracking based on dual liquid crystal polarization gratings

et al. 2022

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In this paper, the relationship between miss distance, target position, and rotation angle of dual liquid crystal polarization gratings (LCPGs) is proposed for the first time, a target tracking system based on the rotating dual LCPGs is established, and a closed-loop target tracking process based on the formula is described. We establish the optical structure of the dual LCPGs, and the simulation compares the difference between the altitude and azimuth angles of the target position from the formula and the ZEMAX simulation. In the simulation validation, we also compare and analyze the proposed formula with the formula for vertical incidence to illustrate the necessity to introduce miss distance. We assemble a target coarse tracking device and perform the tracking experiment using the proposed formula to test the coarse tracking accuracy of the system. The coarse tracking accuracy and the angle information we obtained from simulation and experiment meet our proposed technical specification of no more than 0.45mrad, showing that the proposed formula provides a good basis for stable target coarse tracking and is instructive for engineering applications.

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Research on laser target dynamic tracking system with rotating polarization grating

Wang¹,

Dong²,

Jiang³

et al. 2023

Opt. Express

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A micromechanical target tracking system based on polarization grating (PG) is designed to meet the conformal design of laser communication systems and to realize the lightweight and miniaturization of space laser communication networking. The rotating dual PGs are applied to the dynamic tracking of laser targets for the first time, the relationship between the target position and the dual polarization gratings (PGs) angles is defined, and the PG beam deflection multi-coordinate construction and decoupling are carried out. A dual PGs mathematical model was established, and a controller based on the dual PGs system loop was designed. After calibration and dynamic verification of the dual PGs, the unmanned aerial vehicle (UAV) tracking experiment is conducted for the first time, and the dual axis closed-loop tracking error of the dynamic target is within 300µrad (RMSE). The feasibility of dual PGs tracking formula, the feasibility of laser target fixed-point closed-loop control, and the dynamic closed-loop tracking performance are verified. In engineering applications, the dual PGs tracking system has guiding significance for realizing the lightweight and miniaturization of system integration, as well as the possibility to replace the traditional tracking control system.

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Analytic solution of optical beam steering based on rotational double prisms

Cited by 5 publications

References 0 publications

Exact Analytic Formulae of Beam Pointing Based on Achromatic Risley Prisms

Exact Analytic Formulae of Beam Pointing Based on Achromatic Risley Prisms

Establishment and verification of formulas of target tracking based on dual liquid crystal polarization gratings

Research on laser target dynamic tracking system with rotating polarization grating

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