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相关概念视频

IR Spectrometers01:25

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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单一试验的Ritchey-常见干扰测量

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    科学领域:

    • 光学计量学是指光学计量学.
    • 干涉测量是干涉测量的方法.
    • 精密工程是指精密的工程.

    背景情况:

    • 传统的Ritchey-Common测试对于大型光学平面是繁的,并且由于多个镜子的位置变化,容易出现错误.
    • 现有的方法存在重复性差,系统错误和潜在的安全风险,增加了测试时间和成本.
    • 限制包括额外的镜子变形和潜在的翻转,损害测量准确性和可靠性.

    研究的目的:

    • 开发一种新的单一测试Ritchey-Common干扰测量方法.
    • 为了消除失焦误差,提高大光平面测量的精度.
    • 克服传统多测试方法的缺点,提高效率和安全性.

    主要方法:

    • 建议采用单一测试的Ritchey-Common干扰计方法,消除了对镜子重新定位的需要.
    • 使用小口干扰仪进行次孔径测量,这是在主要测试之前进行的,取代了系统波面测量.
    • 失焦在同一个位置的子光圈中被计算出来,使得精确的光路建模能够确定表面的形状.

    主要成果:

    • 实验验证是在100毫米和2050毫米的光圈平面上进行的.
    • 该方法实现了峰值到谷 (PV) 和平方根平均值 (RMS) 误差分别为0.0889 λ和0.0126 λ,达到干扰仪的精度极限.
    • 结果显示高精度和可行性,可与标准干扰仪相比,但在单个测试中.

    结论:

    • 拟议的单一测试Ritchey-Common干扰仪有效消除了失焦误,并实现了高精度.
    • 这种方法为大型光学平面计量提供了更可靠,更准确,更具成本效益的解决方案.
    • 该技术为制造大型光学元件的实用和安全光学计量技术铺平了道路.