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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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High-definition Fourier Transform Infrared FT-IR Spectroscopic Imaging of Human Tissue Sections towards Improving Pathology
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中红外计算时间幽灵成像

Han Wu1, Bo Hu1, Lu Chen1

  • 1College of Electronics and Information Engineering, Sichuan University, Chengdu, Sichuan, 610064, China.

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|May 28, 2024
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概括
此摘要是机器生成的。

这项研究引入了频率下降转换时间幽灵成像,使得在具有挑战性的光谱区域 (如中红外线) 中实现超快的物体重建. 这种新的方法绕过了不可用的快速探测器和调制器的需求.

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 超快速科学 超快速科学
  • 量子成像是一种量子成像技术.

背景情况:

  • 时间幽灵成像通过将探测器模式与对象调制信号相关联,使用缓慢探测器重建快速物体.
  • 现有的方法需要超快的探测器/调制器,这限制了在中红外线等光谱区域的应用.

研究的目的:

  • 开发适用于缺乏快速调制器和探测器的光谱区域的时间幽灵成像方案.
  • 将时间幽灵成像能力扩展到中红外线和其他具有挑战性的波长范围.

主要方法:

  • 演示了一种频率下调转换的时间幽灵成像技术.
  • 在非线性晶体中利用差异频率生成,将近红外探测模式转移到中红外.
  • 采用计算方法进行图像重建.

主要成果:

  • 成功地在中红外线 (3.24.3μm) 进行了计算时间幽灵成像.
  • 该方案有效地绕过了在目标光谱区域中专用超高速设备的需求.
  • 证明了灵活性和扩展到其他波长模式的潜力.

结论:

  • 频率下调转换方法显著扩大了时间幽灵成像的适用性.
  • 允许在中红外和THz区域进行无扫描探头成像和超快动态研究的新可能性.