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Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
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从稀疏的测量中重建高度分离的波浪阵线.

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    这项研究引入了稀疏的波面传感,使用Shack-Hartmann传感器 (SHSs) 测量高度分歧的波面的仅为1%. 这使得超越传感器极限的高通量测量成为可能.

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    科学领域:

    • 光学和光子学 在光学和光子学.
    • 波浪前线传感和计量学

    背景情况:

    • 传统的波面传感器具有动态范围的限制.
    • 高通量测量对于先进的光学系统至关重要.

    研究的目的:

    • 开发一种用于稀疏测量和重建高度分离的波线的概念.
    • 为了使测量超出传统波浪前传感器的动态范围.

    主要方法:

    • 使用稀疏采样进行直接波面测量.
    • 使用Shack-Hartmann传感器 (SHSs) 来测量一个小部分 (约. 1%) 的波浪线.
    • 从稀疏的数据中重建整个波浪.

    主要成果:

    • 成功地重建了62°分歧的波浪.
    • 取得了大约200nm的平方根平均误差.
    • 已证明适用于低测量时间的应用.

    结论:

    • 稀疏的波面传感对于高度分歧的波面是有效的.
    • 拟议的方法将测量能力扩展到传感器动态范围之外.
    • 这种技术对于高通量光学计量学具有价值.