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相关概念视频

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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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Methods of Obtaining Topography01:25

Methods of Obtaining Topography

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Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
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相关实验视频

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Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
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通过分散无与伦比的光谱域干涉测量来进行长距离拓,该干涉测量基于虚拟成像的相位阵列模式.

Tao Han, Lu Yang, Yun Tang

    Optics letters
    |May 1, 2024
    PubMed
    概括

    我们开发了一种新的远程3D拓方法,使用无与伦比的分散光谱域干涉度与虚拟成像相位阵列 (VIPA) 模式. 这种技术可以实现非异形深度重建,用于精确的表面测量.

    科学领域:

    • 光学和光子学 在光学和光子学.
    • 计量学 计量学是一门学科.
    • 生物医学工程 生物医学工程

    背景情况:

    • 传统的3D地形方法在范围和分辨率方面面临限制.
    • 光谱域干涉测量具有高灵敏度,但可能会遭受别名.
    • 虚拟成像阶段阵列 (VIPA) 提供高光谱分辨率.

    研究的目的:

    • 开发一种长距离的3D地形绘图技术,使用非别名深度重建.
    • 为了利用VIPA模式来提高干扰测量的光谱分辨率.
    • 为了证明该方法在复杂的表面计量学中的可行性.

    主要方法:

    • 使用过的超连续源通过侧入口的法布里-佩罗特标准生成两个组的VIPA模式.
    • 实施了一种无与伦比的分散方法,用于非异位光谱重建.
    • 采用VIPA模式,而不是基于格子的光谱仪,以获得高光谱分辨率.

    主要成果:

    • 在10毫米范围内实现了10dB的灵敏度下降,证明了远程能力.
    • 成功重建了尺寸块的地形和3D打印的牙模型.
    • 定量评估了牙模型的闭口表面.

    更多相关视频

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    结论:

    • 拟议的方法可以实现高光谱分辨率的远程3D地形绘制和非异形重建.
    • 对复杂表面,包括牙科模型,在精确计量学中展示了潜在的应用.
    • 基于VIPA的光谱域干涉测量为传统方法提供了一个有希望的替代方案.