扫描电子显微镜(ScanningElectronMicroscope)基础知识 一、扫描电子显微镜的工作原理 扫描电镜是用聚焦电子束在试样表面逐点扫描成像。试样为块状或粉末颗粒,成像信号可以是二次电子、背散射电子或吸收电子。其中二次电子是最主要的成像信号。由电子枪发射的能量为5～35keV的电子,以其交叉斑作为电子源,经二级聚光镜及物镜...
The Scanning Electron Microscope (SEM) uses optoelectronic system to focus electrons generated by an electronic gun onto a small spot on the sample surface. This beam of electrons will then interact with the sample material to generate secondary electrons, back scatter and signature X-Ray etc. A...
Scanning electron microscope for versatile materials imaging and analysis. Apreo SEM is suited for the analysis of nanoparticles, catalyst, powders and nanodevices.
电子显微镜(SEM,电镜)ScanningElectronMicroscope “扫描电子显微镜”定义：Scanningelectronmicroscope（SEM）。定义1：用电子枪（一次电子）对样品表面扫描使其成像的电子显微镜。定义2：应用电子束在样品表面扫描激发出二次电子成像的电子显微镜。主要用于研究样品表面的形貌与成分。所属学科：光学仪器（二级学科）；电子光学...
Scanning electron microscope for versatile materials imaging and analysis. Apreo SEM is suited for the analysis of nanoparticles, catalyst, powders and nanodevices.
This scanning electron microscope is provided with: a deceleration means that decelerates an electron beam (<B>5</B>) when the electron beam is passing through an objective lens; and a first detector (<B>8</B>) and a second detector (<B>7</B>) that are disposed between the electron...
Scanning Electron Microscope FlexSEM 1000 II FlexSEM 1000 II employs thermionic electron source and achieves resolution of 4.0nm with its compact design ready for desktop setup. Low vacuum mode allows rapid observation of insufficiently conductive samples without metal coating to prevent charging. Optional...
PURPOSE:To make a observation field large and high resolution observation possible by moving a means to shield an electric field on an optical axis and a shielding electrode to the end part of a mirror body in a scanning electron microscope to obtain an observation image by detecting secondary ...
needs. We offer a range of versatile tools — everything from our easy-to-use desktop instruments such as theThermo Scientific Phenom Desktop Scanning Electron Microscopeto powerhouse instruments capable of unparalleled resolution and contrast like theThermo Scientific Verios Scanning Electron Microscope. ...
Apreo 2 Scanning Electron Microscope features High performance, resolution, and contrast High performance, resolution, and contrast The combination of advanced optics, detection and automation in Apreo 2 makes obtaining high resolution imaging possible even for users new to SEM. ...