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相关概念视频

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

1.4K
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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IR Spectrometers01:25

IR Spectrometers

1.2K
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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相关实验视频

Updated: Jul 14, 2025

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

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快照 穆勒光谱对比仪成像仪

Tianxiang Dai1, Thaibao Phan1, Evan W Wang1

  • 1Department of Electrical Engineering, Stanford University, Stanford, CA 94305 USA.

Microsystems & nanoengineering
|October 10, 2023
PubMed
概括
此摘要是机器生成的。

这项研究提出了一种用于同时测量穆勒极化和波长的新型成像系统. 这项技术可以为先进的光学计量应用提供精确的薄膜厚度映射.

关键词:
微光学是一种微光学.纳米光子学和等离子学光学传感器的光学传感器

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Scattering And Absorption of Light in Planetary Regoliths
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Scattering And Absorption of Light in Planetary Regoliths

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Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
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Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

Published on: June 27, 2014

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相关实验视频

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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

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Scattering And Absorption of Light in Planetary Regoliths
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Scattering And Absorption of Light in Planetary Regoliths

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Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
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Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 材料科学 材料科学 材料科学
  • 计算成像技术的成像

背景情况:

  • 精确的偏振和波长测量对于材料特性和光学计量学至关重要.
  • 现有的成像系统通常需要多次捕获或复杂的设置,限制实时分析.
  • 同时获取偏振和光谱信息在光学成像中是一个重大挑战.

研究的目的:

  • 开发一种先进的成像系统,能够同时在单个图像采集中,在多个波长通道中捕捉完整的穆勒偏振响应.
  • 用定制的神经网络展示这个新型成像系统的实时校准方法.
  • 通过准确地重建薄膜厚度图来验证系统的性能.

主要方法:

  • 实施一个分焦平面概念,整合多重复的富里埃光学和望远镜光场成像系统.
  • 利用宽带纳米结构的等离子极化器作为功能性针孔孔口,用于极化分辨率成像.
  • 开发和应用基于神经网络的校准方法,用于实时数据处理.

主要成果:

  • 在单个图像捕获中成功同时记录完整的穆勒极化反应和波长通道.
  • 高度可解释的极化和波长信息直接记录在图像传感器上.
  • 使用校准系统,从四英寸晶圆中精确重建薄膜厚度图.

结论:

  • 开发的成像系统在同时极化和光谱成像方面取得了重大进展.
  • 实时校准方法提高了系统在计量学和机器视觉中的实际应用性.
  • 这项技术有可能用于计量学,机器视觉,计算成像和光学计算等多种应用.