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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 12, 2025

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

紧型眼镜摄像头,具有三分之二波长相位延迟金属传感器.

Jeong-Geun Yun¹, Hyunjung Kang², Kyookeun Lee¹

¹Reality Media Lab, Samsung Research, Samsung Electronics, Seoul, 06765, Republic of Korea.

Nature communications

|August 7, 2025

概括

研究人员开发了一种新型的红外金属,可以降低紧型成像系统的纳米结构高度. 这一创新使得广泛的视野眼睛成像,用于应用程序,如眼神跟踪和虹膜认证.

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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

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Last Updated: Sep 12, 2025

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

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科学领域:

光学和光子学在光学和光子学.
纳米技术纳米技术
生物医学成像技术生物医学成像技术

背景情况:

移动设备需要紧,高性能的成像系统.
金属镜头为传统镜头提供了替代品,但面临着制造方面的挑战.
高比例纳米结构增加了成本,降低了金属制造中的产量.

研究的目的:

提出一个红外金属设计,减少纳米结构的面积比.
为了证明降低纳米结构高度不会影响金属的性能.
开发一个紧的眼睛成像系统,用于注视跟踪和虹膜认证.

主要方法:

设计了一种具有广泛视野和降低纳米结构尺寸比的红外金属.
使用了4π/3的相调节深度,是传统设计的三分之二.
将金属集成到一个原型的紧眼镜成像系统中.

主要成果:

通过metalens系统实现了120度的视野.
证明了降低了纳米结构高度而不会降低性能.
开发了一种超紧的眼镜摄像头模块,总轨道长1.758毫米.

结论:

拟议的metalens设计克服了商业采用的制造限制.
紧的眼睛成像系统适用于目光跟踪和虹膜认证.
这项技术在扩展现实设备中具有重要的商业化潜力.