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相关概念视频

Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

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...
Phase Changes01:19

Phase Changes

Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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相关实验视频

Updated: Jun 15, 2026

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
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多功能太空光子与石灰化物相变材料.

Hyun Jung Kim1, Matthew Julian2, Calum Williams3

  • 1NASA Langley Research Center, Hampton, VA, USA. hyunjung.kim@nasa.gov.

NPJ microgravity
|February 20, 2024
PubMed
概括

换相材料 (PCM) 为太空任务提供耐辐射,可重新配置的光子学. 这些材料使轻量级,节能的光学系统用于增强地球观测和深空探索.

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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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相关实验视频

Last Updated: Jun 15, 2026

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科学领域:

  • 材料科学 材料科学 材料科学
  • 太空工程 太空工程
  • 光电学是指光电子产品.

背景情况:

  • 太空系统需要更小,更轻的组件,具有增强功能.
  • 阶段变换材料 (PCM) 是非挥发性,可重新配置和快速切换的材料.
  • PCM具有很高的太空辐射耐受性,使其适合用于太空应用.

研究的目的:

  • 讨论PCM研究中用于太空光子学的最新进展.
  • 探索PCM从地面应用到太空应用的转变.
  • 强调PCM在下一代太空和科学任务中的潜力.

主要方法:

  • 审查最近的PCM研究和开发.
  • 对与太空环境相关的PCM属性的分析.
  • 案例研究和NASA应用的例子.

主要成果:

  • 对于光学系统来说,PCM证明了强度,轻量设计和能源效率.
  • 可重新配置的光学系统可以在轨道上动态控制.
  • 材料国际空间站实验-14 (MISSE-14) 任务飞行的PCM显示在恶劣的太空环境中适用性.

结论:

  • PCM是一个有前途的材料平台,用于多功能空间光子学.
  • 它们的独特特性支持在太空中增强科学和任务目标.
  • PCM可以为当前和未来的太空任务提供高级功能.