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Atomic Force Microscopy

Atomic Force Microscopy

Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...

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Updated: Jan 11, 2026

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

使用光纤分布式声学传感和光束成形技术进行近场声学成像.

Marcelo A Soto¹, Diego Badillo-San-Juan¹

¹Department of Electronics Engineering, Universidad Técnica Federico Santa María, Valparaíso, 2390123, Chile.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|November 14, 2025

概括

本研究介绍了一种光束成形方法,使用分布式声学传感 (DAS) 创建一个声学摄像头. 这种技术可以拍摄光纤之外的机械振动,从而可以对声波进行更广泛的监测.

科学领域:

地质物理学地质物理学
信号处理信号处理
传感器技术传感器技术

背景情况:

分布式声学传感 (DAS) 提供了光纤沿线的仪表尺度振动检测.
目前的DAS局限性包括不切实际的密集光纤部署用于大面积监控.
在没有直接光纤接入的地区需要监测声波.

研究的目的:

开发一种在光纤周围成像声学排放的方法,扩展到部署区域之外.
创建一个能够生成二维或三维声学图的声学摄像头.
在未被监测的区域精确定位振动源和声学反射.

主要方法:

建议采用基于光束成形的方法,利用近场阵列信号处理.
多个分布式声学传感 (DAS) 通道被组合在一起.
一个盲目选择过程识别出高质量的DAS通道以减轻限制.

主要成果:

该方法可以在没有光纤部署的地区进行声学成像.
具有米尺度分辨率的2D或3D声学地图在几平方公里内生成.
实现了对振动源和潜在声学反射的精确定位.

关键词:

声学成像的成像技术梁造型梁造型梁造型梁造型分布式声学传感传感器光纤传感器的光学纤维传感器雷利散射雷利散射雷利散射

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Last Updated: Jan 11, 2026

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

Three-dimensional Optical-resolution Photoacoustic Microscopy

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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Published on: November 7, 2016

结论:

开发的光束成形技术显著扩展了DAS.AS的功能.
这种方法促进了更广泛的声学监测和振动源定位.
它为在偏远地区对振动波传播的先进分析铺平了道路.