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相关概念视频

Upsampling01:22

Upsampling

568
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
568

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Convergent Polishing: A Simple, Rapid, Full Aperture Polishing Process of High Quality Optical Flats & Spheres
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多步重叠路径用于抑制中位空间频率误差在引擎盖抛光.

Xuepeng Huang, Zhenzhong Wang, Maoyuan Li

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    |December 19, 2025
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    概括
    此摘要是机器生成的。

    一个新的多步重叠抛光路径有效减少光学元件制造中的中空间频率 (MSF) 误差. 这种方法显著降低了峰值功率光谱密度 (PSD),与传统的形路径相比,提高了表面质量.

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    科学领域:

    • 光学工程是指光学工程.
    • 材料科学 材料科学 材料科学
    • 制造过程 制造过程 制造过程

    背景情况:

    • 帽子抛光对于光学元件制造至关重要,提供高效率和表面控制.
    • 传统的光抛光路径经常引入不良的中空间频率 (MSF) 错误.
    • 了解工具影响函数 (TIF) 和料方向是减轻MSF错误的关键.

    研究的目的:

    • 为了研究TIF和亚齐穆塔尔料角度对MSF误差的影响.
    • 开发和验证一个新的多步重叠路径战略,以减少MSF错误.
    • 为了提高光学元件制造中的表面质量.

    主要方法:

    • 数字模拟验证拟议的多步重叠路径策略.
    • 使用开发的路径策略进行实验性抛光.
    • 对峰值功率光谱密度 (PSD) 的分析,以量化MSF错误减少.

    主要成果:

    • 多步重叠路径显著减少了峰值PSD,从1160.44nm2·mm降至235.6nm2·mm.
    • 实验验证证了拟议的路径战略的有效性.
    • 在机顶抛光中显示出MSF错误的显著抑制.

    结论:

    • 优化亚齐图斯进料角度对于减少MSF误差至关重要.
    • 多步重叠路径策略提供了一个有效的解决方案,以尽量减少MSF错误.
    • 这种方法提高了制造的光学元件的精度和质量.