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相关概念视频

Interference: Path Lengths01:10

Interference: Path Lengths

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Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
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Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

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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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Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

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Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
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Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences01:20

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences

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Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and...
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Gain01:15

Gain

175
Gain and phase shift are properties of linear circuits that describe the effect a circuit has on a sinusoidal input voltage or current. The circuit's behavior that contains reactive elements will depend on the frequency of the input sinusoid. As a result, it is observed that the gain and phase shift will all be frequency functions.
Gain:
Suppose Vin is the input and Vout is the output signal to a circuit.
175

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广度相位转移干涉测量的一般化.

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    一种全新的广度相位移交干扰测量 (APSI) 方法允许在不同相位步骤下准确的光场恢复. 这种强大的技术可以减少干扰测量测量中的误差和噪声.

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    相关实验视频

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    科学领域:

    • 光学物理学的光学物理.
    • 干涉测量是干涉测量的方法.
    • 计量学 计量学 计量学

    背景情况:

    • 振幅相位移干涉计 (APSI) 使用相位调节的干涉图恢复光学场.
    • 标准的APSI假设均的相位步骤,这可能会导致由于设备校准错误或非线性导致的不准确性.

    研究的目的:

    • 通过允许非统一的相位步骤来提高准确性和稳定性来概括APSI.
    • 在双孔通路干扰仪 (DACPI) 中实现通用的APSI,以最大限度地减少误差和噪声.

    主要方法:

    • 为APSI开发一个具有任意阶段步骤的通用数学模型.
    • 在DACPI设置中实验实施通用的APSI技术.
    • 数字噪声分析以验证拟议方法的稳定性.

    主要成果:

    • 成功演示了使用非统一的阶段步骤的通用APSI.
    • 通过使用DACPI,减少了实验误差和噪声.
    • 通过实验和数值研究验证了通用APSI技术的准确性和稳定性.

    结论:

    • 一般化的APSI技术为复杂的振幅恢复提供了更强大的方法.
    • DACPI的实施进一步提高了相位和振幅检索的可靠性和准确性.
    • 这一进步为光场分析提供了更可靠的工具.