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相关概念视频

Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

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Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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相关实验视频

Updated: Jul 9, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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用单个光探测器进行的光学干扰相位控制方法,用于干扰光刻法.

Lei Cao, Sen Lu, Kaiming Yang

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    此摘要是机器生成的。

    这项研究引入了一种用于干扰光刻的新型光学相位控制方法,利用带指数达到法 (SMCE) 的滑动模式控制来提高稳定性和抗干扰性. 这种SMCE方法在传统的PID控制中表现出更高的性能.

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    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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    相关实验视频

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    Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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    科学领域:

    • 光学和光子学 在光学和光子学.
    • 控制系统工程 控制系统工程
    • 纳米制造技术的技术.

    背景情况:

    • 干扰光刻系统容易受到严重干扰,影响相位控制的准确性.
    • 现有的控制方法可能缺乏稳定性和有效的短暂反应.
    • 精确的光学相位控制对于高分辨率图案生成至关重要.

    研究的目的:

    • 设计和验证用于干扰光刻系统的强大的光学相位控制方法.
    • 提高抗扰能力和短暂响应时间.
    • 为了使用单个光探测器实现精确的干扰相调节.

    主要方法:

    • 基于滑动模式控制 (SMCE) 的指数式达到定律的控制系统的开发.
    • 使用Lyapunov定理推导系统模型和稳定性证明.
    • 在不同的光探测器参考电压下分析系统行为.
    • 实验验证SMCE方法与比例-积分-导数 (PID) 控制对比.

    主要成果:

    • 基于SMCE的方法成功地通过单个光探测器实现了非周期性干扰相控制.
    • 理论分析和模拟证实了系统的稳定性和有效性.
    • 实验结果表明,与PID对照相比,SMCE方法提供了优越的短暂反应和干扰排斥.

    结论:

    • 拟议的SMCE方法为在干扰下干扰光刻画中的光学相位控制提供了有效的解决方案.
    • 使用单个光电探测器简化了系统设计,同时保持了高控制性能.
    • 这一进步有助于更可靠,更精确的纳米制造工艺.