Hitachi Microscope & Magnifier S-4800 Manual De Usuario

 

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  General Characteristic of signals utilized in S-4800 

 

Signal Characteristics 

Applications 

SE signal 

･High resolution surface information   

･Voltage contrast 
･High edge contrast 
･Sensitive to specimen charging 

Useful for ultra high resolution 
topmost surface observation of light 
materials like carbon 

BSE-L 
signal 

･Sensitive to compositional 
information  
･information of depth of specimen 
･Less sensitive to specimen charging 
･Less edge contrast 

Useful for microscopy of a wide range 
of materials, specifically for 
suppressing edge contrast, enhanced 
compositional information, reducing 
specimen charging artifact.     

BSE-H 
signal  

･Sensitive to compositional 
information 
･information of depth of specimen 
･Less sensitive to specimen charging 
･Less edge contrast 
･Signal amount varies with materials 

Useful for microscopy of enhanced 
compositional contrast or inner 
structures.    Low signal amount may 
limit applications for some materials   

When Mix or Upper has been selected, the ratio of SE, BSE-L and BSE-H signals included in the 
upper detector output is controllable with the Signal control tools. 
 
 
 
 
 
 
 
 
When SE is selected,   
When +BSE is selected, amount of BSE signal is controlled by BSE ratio selection box.     
Select a ratio from the pull down list clicking the arrow button. Low angle BSE will be detected 
with L.A0 to L.A100. With larger number, amount of SE is suppressed and results BSE richer 
image. H.A results high angle BSE image. 

(1) SE Signal Detection 

When the SE button is selected, the upper detector signal will be of pure SE 
 

                                                         

 

 
Although BSE is detected with the upper detector, amount of SE signal is significantly greater. 

   

 

   

Signal control tools 

 

BSE ratio selection box