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相关概念视频

Phase Contrast and Differential Interference Contrast Microscopy01:26

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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 1, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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基于相位移动数字全息算法相位移动的自适应相位移动干扰计.

Xianxin Han, Yuheng Wang, Zhengyang Bu

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    此摘要是机器生成的。

    这项研究引入了自适应相位移交干扰计 (PSI) 以实现精确的相位检索. 它同步相位转移测量和相位检索,减少错误和获取时间,以获得可靠,高精度的结果.

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    相关实验视频

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    科学领域:

    • 光学计量学 在光学计量学
    • 干涉测量是干涉测量的方法.
    • 数字全息图 (Digital Holography) 是一个数字全息图.

    背景情况:

    • 精确的相位转移对于相位转移干扰仪 (PSI) 中高精度相位检索至关重要.
    • 现有的PSI方法可能容易出现相位移错误,需要大量的获取和计算时间.

    研究的目的:

    • 开发一种适应性PSI系统,用于精确的相位检索.
    • 为了提高干扰度应用中的可靠性和减少测量时间.

    主要方法:

    • 同步捕获相位移测量干扰图和相位测量干扰图.
    • 使用单频段相位移测算算法 (SS-PSMA) 进行相位移计算.
    • 采用自适应相位转移数字全息算法 (PSDHA) 基于复杂的振幅恢复进行相位检索.

    主要成果:

    • 实现了0.02半径的高精度相位检索.
    • 证明了很短的计算时间 (<25 ms).
    • 成功消除了由相位变换器和外部干扰引起的相位移动错误.
    • 验证适用于不同类型的干扰图 (边缘形状和数字).

    结论:

    • 基于PSDHA的拟议的自适应PSI提供了卓越的可靠性和准确性.
    • 它显著减少了干扰图获取和相位检索计算时间.
    • 这种方法确保了可靠的相位变化测量和相位检索,即使有不同的边缘模式和干扰.