Multi-path liquid crystal programmable phase modulation system based on MCU
A phase modulation and programming controller technology, which is applied in general control systems, control/regulation systems, program control, etc., can solve the problems of multiple control channels, low cost, and high deflection precision, and achieve multiple control channels and fast response The effect of fast and high deflection precision
Active Publication Date: 2019-11-01
XIAN TECHNOLOGICAL UNIV
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However, since the deflection system requires multiple control voltages at the same time, and the liquid crystal polarization grating is still in the development stage, there is no targeted controller design yet.
However, the output channels of the traditional signal generator and the output port of the single-chip microcomputer are limited, and it is difficult to meet the requirements of multiple control channels, wide amplitude coverage, high deflection accuracy, small size, and low cost at the same time, which increases the difficulty of realizing the scanning system.
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[0032] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the application are not shown or described in the description, this is to avoid the core part of the application being overwhelmed by too many descriptions, and for those skilled in the art, it is necessary to describe these operations in detail Relevant operations are not necessary, and they can fully understand the relevant operations according to the description in the specification and genera...
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The invention relates to a multi-path liquid crystal programmable phase modulation system based on a MCU. The system comprises a phase modulation structure and a multi-path programmable controller based on the MCU; the phase modulation structure comprises a half-wave variable delayer and multiple liquid crystal polarized gratings; the half-wave variable delayer and multiple liquid crystal polarized gratings are orderly and crossly cascaded to form a large-angle beam scanning system; a laser device emits the polarized light, and the polarized light enters the beam scanning system after passingthrough a beam-expander collimation system. The phase modulation is performed by adopting a way of cascading the half-wave variable delayer and the liquid crystal polarized gratings, and a multi-pathliquid crystal programable controller based on the MCU is provided, thereby realizing the multi-channel, high-resolution, high-speed, programmable beam deflection and scanning control on the beam.
Description
technical field [0001] The invention relates to the field of liquid crystal optical phased arrays, in particular to an MCU-based multi-channel liquid crystal programmable phase modulation system. Background technique [0002] Liquid crystal phased array is a new type of programmable phase modulation beam scanning device that combines microwave phased array antenna technology and liquid crystal electro-optical characteristics. Applying different AC voltages to each element of the liquid crystal optical phased array will change the default orientation of the internal liquid crystal molecules, and then change the phase difference of the polarized beam to form different wavefront phases. Therefore, by changing the voltage value applied to the liquid crystal polarization grating, the outgoing direction of the light beam can be actively controlled to realize the light beam deflection. Compared with traditional mechanical beam control technology, liquid crystal optical phased arra...
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Login to View More IPC IPC(8): G02F1/133G05B19/042
CPCG02F1/133G05B19/042
Inventor 刘雪莲王春阳史红伟谢达吕绪浩施春皓
Owner XIAN TECHNOLOGICAL UNIV