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Infrared (IR) Spectroscopy: Overview01:09

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When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
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一个单镜头波纹编码红外摄像机的设计.

Mahendra Pratap Singh, Neeraj Pandey, L M Pant

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    概括

    这项研究介绍了一种使用波面编码的紧型单镜头红外成像系统. 该设计在广泛的视野和温度范围内实现一致的性能,使轻量级和低成本的红外光学成为可能.

    科学领域:

    • 光学工程是指光学工程.
    • 红外成像系统 红外成像系统

    背景情况:

    • 传统的红外成像系统在不同条件下经常面临尺寸,成本和性能一致性的挑战.
    • 波面编码为提高光学系统的稳定性和适应性提供了一个潜在的解决方案.

    研究的目的:

    • 设计一个紧的,单镜头红外成像系统,具有空间不变的点扩散函数 (PSF).
    • 通过使用波面编码,在广泛的视野和广泛的温度范围内实现一致的光学性能.
    • 开发一种轻量级,低成本的红外成像解决方案,使用当前的制造技术可行.

    主要方法:

    • 在单个镜头上使用了泛化立方相罩的波面编码.
    • 利用镜头曲和非球面来最大限度地减少最初的偏差,如昏迷和球形偏差.
    • 使用通用立方相面罩优化了对失焦和二次偏差的设计.

    主要成果:

    • 实现了空间不变的PSF,在±4°×3°) 的视野中具有一致的性能.
    • 证明了从-20°C到+60°C的超热化,具有几乎不变的调制转移函数 (MTF).
    • 图像模拟显示使用维纳去卷积和单轴PSF在温度和场变化之间进行高质量的恢复.

    结论:

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    • 拟议的单镜头红外成像系统设计是实用的和可制造的.
    • 波编码方法有效地弥补了异常和环境变化.
    • 这种设计适用于开发紧,轻量级和具有成本效益的红外光学系统.