LVEM25 TECHNOLOGY AND DESIGN
Field Emission Gun
The uniquely-designed 25kV Schottky type FEG (field emission gun) employed by the LVEM25 has very high brightness and spatial coherence with a lifetime of several thousand hours. The high brightness and small virtual source of the electron gun allows transmission and scanning modes in a single instrument.
Ion Getter pumping: clean vacuum, clean column, clean images
Ion pumps are inherently dry, vibration-free and achieve very high vacuum levels. By making use of specially designed ion getter pumps, the LVEM25 avoids all contamination in the sample space, resulting in stable imaging conditions and the absence of any artifacts.
Permanent magnet lenses: Cooling not required
The LVEM25 is designed to operate without any cooling. With conventional electron microscopes active cooling is required to remove considerable heat generated by electric current circulating in the electromagnetic lenses. The uniquely designed permanent magnet lenses used in the LVEM25 require no cooling.
Transmission Electron Microscopy: inline, two stage optics platform
Electron optics provide the initial stages of magnification cation where the initial image is formed on a YAG scintillator screen.
Light optics that are stable and reliable, further magnify the initial image from the YAG screen. Light transport from the fluorescent screen into the light optics is highly efficient.
Digital Imaging is done by means of a TE Cooled Scientific CMOS camera with 2560×2160 pixels mounted on the top of the LVEM25. The image capture software is designed for acquisition, documentation, and analysis of high performance image data. Various image processing procedures, such as summing, live FFT and automatic contrast adjustment are available.