DEVELOPMENT AND PERFORMANCE OF A FAST FIBER-PLATE COUPLED CCD CAMERA AT MEDIUM-ENERGY AND IMAGE-PROCESSING SYSTEM FOR ELECTRON HOLOGRAPHY

A new slow-scan CCD camera with a readout speed of either 2 MHz or 150 kHz has been developed for electron microscopy at medium energy. Rule s for the design of electron image converters will be presented, and t he most relevant data - such as sensitivity, modulation transfer funct ion (MTF), and detective quantum efficiency (DQE) - of two different s cintillator types (single-crystal YAG and poly-crystal P20) are measur ed. The camera is fully integrated into the image processing system VI PS-1000, which is designed for electron microscopy including remote co ntrol functions. The modular software package EM-MENU contains a broad range of functions optimized for fast and user-friendly operation of the TEM. Two application programs for object wave reconstruction by of f-axis holography or focus variation will be presented.