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Phase Contrast and Differential Interference Contrast Microscopy

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...

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Updated: Sep 15, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

具有极化编码元表面的相位移结构照明.

Linzhi Yu¹, Jesse Pietila¹, Haobijam Johnson Singh¹

¹Department of Physics, Tampere University, 33720 Tampere, Finland.

|July 17, 2025

概括

此摘要是机器生成的。

研究人员开发了一种紧的超表面,用于相位转移结构化照明,从而实现可靠的3D表面测量. 这种极化控制装置为光学计量学和计算成像应用提供了稳定,集成的解决方案.

关键词:

通过3D测量进行3D测量.边缘投影的概况测量方法 metasurfaces 是一个地表.变相结构化照明的结构化照明

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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

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Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

相关实验视频

Last Updated: Sep 15, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

Published on: June 7, 2019

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

科学领域:

光学和光子学在光学和光子学.
计量学计量学计量学
材料科学材料科学材料科学

背景情况:

阶段转移结构化照明对于先进的成像技术至关重要,如3D表面测量.
传统方法往往涉及复杂,重的机械或光电子系统,阻碍了实际应用.
需要紧,稳定和集成的解决方案来生成结构化的光模式.

研究的目的:

引入一种新的极化控制的介电超表面,用于生成相位移边缘图案.
为了展示一个紧而坚固的结构光投影系统.
为了使高效的3D表面测量使用开发的 metasurface.

主要方法:

设计和制造一个受偏振控制的介电元表面.
编码不同的相网格用于直角偏振,以创建侧边缘移位.
边缘生成和应用在边缘投影造型测量中用于3D表面测量的实验性演示.

主要成果:

在可见光谱中成功生成高质量的相位移边缘图案.
一个紧的,毫米尺度的地表设备的演示.
精确的3D表面测量物体使用基于 metasurface 结构化照明系统.

结论:

极化控制的介电超表面为结构光生成提供了紧,被动和强大的解决方案.
该技术将多个相位移动步骤集成到一个静态设备中.
该方法在光学计量学,计算成像和其他需要结构化照明的应用中具有广泛的潜力.