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相关概念视频

IR Spectrometers01:25

IR Spectrometers

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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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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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相关实验视频

Updated: Jul 9, 2025

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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改进的分散编码全范围光谱干扰测量用于大深度,大倾斜和粗样本.

Tanbin Shao, Kecheng Yang, Min Xia

    Optics express
    |November 29, 2023
    PubMed
    概括

    这项研究引入了增强的分散编码全范围光谱干扰计,用于深度,倾斜和粗样本的准确测量. 改进的技术增强了相位补偿,扩大了深度测量范围和复杂表面的精度.

    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.
    • 表面形测量仪表面形测量仪

    背景情况:

    • 精确测量具有显著深度,倾斜和粗度的样品是具有挑战性的,因为光学信号强度和干扰条件较低.
    • 现有的光谱干涉测量方法需要精确的相位补偿来可靠地测量复杂的表面.

    研究的目的:

    • 开发和验证一种增强的分散编码全范围光谱干扰测量技术.
    • 为了提高复杂表面特征的样品的测量精度和范围.

    主要方法:

    • 通过减去干扰频谱外来识别接近零光学延迟的弱信号,实现了直流去除.
    • 保存数据具有良好的相连续性,以减轻光谱仪偏差并提高相补偿精度.

    主要成果:

    • 将深度测量范围从6毫米扩大到12毫米.
    • 实现了2.5μm的轴向测量精度.
    • 通过对陶和3D打印样品进行全深度成像,与激光线形状造型器相比,对复杂表面具有卓越的适应性.

    结论:

    • 增强的光谱干扰测量技术显著提高了测量准确度和挑战性样品的范围.
    • 该方法在复杂的表面上提供了强大的性能,优于传统的激光线形状造型器.

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