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Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

13.4K
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,...
13.4K
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

8.2K
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...
8.2K
X-ray Crystallography02:18

X-ray Crystallography

24.0K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
24.0K
The Wave Nature of Light02:12

The Wave Nature of Light

49.3K
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion. 
49.3K
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

7.0K
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...
7.0K
Photoelectric Effect02:26

Photoelectric Effect

29.8K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
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相关实验视频

Updated: Jul 16, 2025

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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光子对衍射,干扰,光学连贯性和图像形成的方法.

Mohammad Taghi Tavassoly, Morteza Jafari Siavashani, Ali-Reza Moradi

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    PubMed
    概括
    此摘要是机器生成的。

    这项研究引入了光学的"光子方法",用量子原理解释了像衍射和干扰这样的现象. 这种量子视角为干扰边缘提供了比传统波浪理论更合理的解释.

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    Quantitative Optical Microscopy: Measurement of Cellular Biophysical Features with a Standard Optical Microscope
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    相关实验视频

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    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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    Quantitative Optical Microscopy: Measurement of Cellular Biophysical Features with a Standard Optical Microscope
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    科学领域:

    • 量子光学就是一个量子光学.
    • 波-粒子二元性是什么?
    • 光子的行为是光子行为.

    背景情况:

    • 经典光学往往难以完全解释量子现象.
    • 不确定性原理是量子力学的基础.

    研究的目的:

    • 提出和验证一个项目.
    • 光子接近的方法
    • 基于量子不确定性原理来解释光学现象.
    • 为了证明光子方法对波方法的优越性,用于干扰模式.

    主要方法:

    • 应用不确定性原理来将概率幅度与光子在光圈上的幅度联系起来.
    • 叠加光子振幅以确定检测概率.
    • 使用光子方法分析衍射和干扰.

    主要成果:

    • 光子方法成功地解释了从单裂和双裂的衍射.
    • 它提供了一个更直观的解释干扰边缘在实验,如双 prism 和迈克尔森的干扰计.
    • 光的相干性行为是从不确定性原理推断出来的.

    结论:

    • 光子方法为理解光的波形和粒子方面提供了一个统一的框架.
    • 这种量子视角为光学现象提供了更基本的解释,包括干扰和衍射.
    • 射线光学规律和图像形成可以从这种基于光子的模型中得出.