lop- 
vels 
the 
Ors. 
lti- 
then 
ection. 
8. 
  
Fonctional diagram of the MIDAS densitometer 
  
  
Scope tube — 
  
  
displacement 
circuit 
(spot and table) 
control 
  
  
  
interchangeable 
objective 
  
  
  
  
  
I 
  
Ne 
[m 
Lp 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
| 
displacement | X-Y table 
digital control ; | 
photomulti- : 
^^ pii er | 
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converter 
Ne 
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