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相关概念视频

Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

137
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
137

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高效,动态的光束方向装置,使用潘查拉特纳姆阶段.

Brandon Vreeland, Andre Van Rynbach, Philip Bos

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    此摘要是机器生成的。

    一个新的液晶装置提供了高效的,非机械的光束方向. 这种Pancharatnam相位装置实现了高转向角度和红外光的效率.

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    科学领域:

    • 光子学和光学工程的工程.
    • 材料科学 材料科学 材料科学
    • 液晶显示器 液晶显示器

    背景情况:

    • 对于先进的光学系统来说,非机械的光束转向是至关重要的.
    • 现有的方法通常面临效率,光圈大小或复杂性的局限性.
    • 液晶设备提供可调节的光学特性,用于光束操纵.

    研究的目的:

    • 提出和演示一个大孔,非机械的光束转向装置.
    • 为了实现高效的光束转向使用连续相形状.
    • 为光束控制开发一个可电调的Pancharatnam相梯度.

    主要方法:

    • 使用边缘场电极结构和液晶导体的垂直表面对齐.
    • 实施了一种新的两步电压应用方法.
    • 数字计算了一个例子,用于红外光 (1550 nm) 的光束方向装置.

    主要成果:

    • 证明了无缺陷的,连续的相形状,用于高效的光束转向.
    • 实现了红外光的转向角度,范围从1度以下到10度以上.
    • 获得的光学效率超过80%.

    结论:

    • 拟议的装置提供了一种新方法,用于光束转向,具有以前无法获得的性能.
    • 这种单层的Pancharatnam相位装置提供了可电调的,高效的光束转向.
    • 该技术在光通信,传感和成像方面有潜在的应用.