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相关概念视频

Reflective Property of Parabolas01:26

Reflective Property of Parabolas

A parabola is a basic type of conic section that results from the intersection of a plane with a double-napped cone in a direction parallel to one of the cone's sides. This U-shaped curve has a distinctive reflective property: all incoming rays parallel to its axis of symmetry are directed toward a single point, known as the focus. This property is widely utilized in optical and communication technologies that require precise signal concentration.In analytic geometry, a parabola is defined as...

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消除对平面元素的寄生体反射,基于多频相位移在相位测量偏光学.

Siya Huang1, Yuankun Liu1, Xin Yu1

  • 1College of Electronics & Information Engineering, Sichuan University, Chengdu 610065, China.

Sensors (Basel, Switzerland)
|February 24, 2024
PubMed
概括

这项研究引入了一种新的多频相位移方法,以克服相位测量偏向计 (PMD) 中的寄生反射,以准确测量镜面表面.

科学领域:

  • 光学计量学是指光学计量学.
  • 表面表征表征表征的表征表征.
  • 精密工程是指精密的工程.

背景情况:

  • 阶段测量偏向计 (PMD) 对于镜面表面测量至关重要.
  • 后面表面的寄生反射阻碍了PMD中顶部表面的准确测量.
  • 现有的方法很难从叠加的反射中分离顶部表面的数据.

研究的目的:

  • 开发一种有效的方法来消除PMD中的寄生体反射.
  • 准确地重建镜像物体顶部表面的形状.
  • 为了使具有挑战性的样品可靠的表面计量学.

主要方法:

  • 提出了一种结合多频和相位移技术的新方法.
  • 研究相位误差和边缘频率之间的关系.
  • 建立一个辅助函数来识别零相误差的特定频率.

主要成果:

  • 拟议的方法通过消除后面表面反射,成功地隔离了顶部表面阶段.
  • 测量了40毫米平面元件和19毫米平面玻璃.
  • 与干涉测量相比,最多达20nm的根平均平方误差 (RMSE) 得到了实现.

结论:

关键词:
多频方法是多频方法.寄生虫反射反射是一种寄生虫反射.阶段测量偏向测量法测量法.

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  • 多频相位移方法有效地解决了PMD中的寄生体反射.
  • 该技术可靠地重建了镜像物体的顶部表面形状.
  • 实验验证证证实了该方法在表面计量学中的可行性和准确性.