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相关概念视频

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
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Phase Contrast and Differential Interference Contrast Microscopy01:26

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Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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Super-resolution Fluorescence Microscopy01:37

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Confocal Fluorescence Microscopy01:16

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
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微镜头阵列摄像头具有可变光圈,用于一次性高动态范围 (HDR) 成像.

Young-Gil Cha, Jiwoong Na, Hyun-Kyung Kim

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    此摘要是机器生成的。

    本研究介绍了一种微镜阵列摄像机,用于高动态范围 (HDR) 成像. 新的摄像头设计在一次拍摄中捕获多个低动态范围 (LDR) 图像,以高分辨率和无运动工件重建详细的HDR图像.

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    科学领域:

    • 光学和光子学 在光学和光子学.
    • 图像传感器 图像传感器
    • 计算成像技术的成像

    背景情况:

    • 高动态范围 (HDR) 成像对于捕捉极端变化的照明场景至关重要.
    • 现有的HDR技术往往受到运动工件的影响,或需要多次曝光.
    • 机器视觉和移动应用需要紧而高效的HDR解决方案.

    研究的目的:

    • 开发一种用于高动态范围 (HDR) 成像的新型摄像系统.
    • 为了实现HDR成像,使用单次曝光和可变光圈微镜头阵列来实现HDR成像.
    • 在动态范围,分辨率和运动文物方面评估开发的相机的性能.

    主要方法:

    • 设计和制造具有可变光圈 (MACVA) 的微镜阵列摄像机.
    • 集成可变光圈,微镜阵列,间隙间隔器和CMOS图像传感器.
    • 在单次曝光中捕获多个低动态范围 (LDR) 图像,具有不同的f-stop.
    • 从捕获的LDR图像中重建HDR图像.

    主要成果:

    • 在一次曝光中,MACVA系统成功地捕获了不同f-stop的LDR图像.
    • 与LDR图像相比,重建的HDR图像显示了显著扩大的动态范围.
    • 在HDR图像中保持了高分辨率,没有观察到运动工件.
    • 通过MTF50评估的图像质量与LDR图像中观察到的最大质量相当.

    结论:

    • 开发的微镜头阵列摄像机具有可变光圈 (MACVA) 为单拍HDR成像提供了有效的解决方案.
    • 这种紧型相机设计为机器视觉和需要先进成像能力的移动设备应用提供了新的视角.
    • 通过消除动作文物并保持高分辨率,MACVA系统克服了传统HDR方法的局限性.