Image generation in SEM:raster scan Acceleration voltage Cathode Wehnelt cylinder Anode This is very much similar to TV Condensor lens 1 FASTX Screen:Brightness is proportional to Condensor lens 2 START SE or BSE signal SLOW 图 Scan generator Deflection coils END (X and Y (scan) deflection) Objective ens Amplifiers ←BSE detector SE detector Secondary Back-scattered electrons(SE electrons Probe (BSE) 5Image generation in SEM: raster scan 5 This is very much similar to TV