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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: Jul 12, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

一个改进的SPIDER光学系统的结构设计,基于多模干扰合器.

Xiaohan Song, Yong Zuo, Tianjie Zeng

|October 20, 2023

概括

一个改进的细分平面成像探测器用于电光侦察 (SPIDER) 系统使用多模干扰合器来加倍空间频谱覆盖. 这种增强导致与原来的SPIDER系统相比,图像恢复质量更高.

科学领域:

光学和电光工程的光学和电光工程.
遥感技术遥感技术遥感技术
信号处理信号处理

背景情况:

传统的远距离探测依赖于大光圈望远镜,这些望远镜是重的,耗电密集的.
用于电光侦察的分割平面成像探测器 (SPIDER) 提供了一个紧,轻量级和低功耗的替代方案.
原始SPIDER系统空间频谱覆盖的局限性阻碍了最佳的图像恢复.

研究的目的:

提出和评估一个改进的SPIDER系统,包括一个多模干扰 (MMI) 合器.
增强SPIDER系统的空间频谱覆盖范围.
为了证明MMI-SPIDER系统对图像恢复质量的好处.

主要方法:

通过用MMI合器替换直角探测器,开发了一个MMI-SPIDER系统.
实施了三点配置方法,用于lenslet设置.
从MMI输出电流计算空间频谱值.
通过系统模拟进行比较性能分析.

主要成果:

与原来的SPIDER相比,MMI-SPIDER系统成功地将空间频谱覆盖率翻了一番.
模拟证实了MMI-SPIDER系统中更完整的空间频谱覆盖.

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Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Published on: November 22, 2019

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Last Updated: Jul 12, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Published on: November 22, 2019

增强的覆盖率直接转化为更好的图像恢复质量.

结论:

MMI-SPIDER系统代表了电光侦察技术的重大进步.
用MMI合器替换直角探测器是提高空间频谱覆盖率的有效策略.
MMI-SPIDER系统为远距离检测和图像恢复提供了卓越的性能.