ANTISCREEN 
NOISE CIRCUIT 
LS 
PHOTOCELL 
BEAM 
SPLITTER 
PHOTO- 
MULTIPLIER 
TUBE 2 
| 
  
  
  
CATHODE-RAY 
LAMP AND 
CONDENSERS 
YELLOW 
FILTER 
DICHROIC 
MIRROR 
PHOTOGRAPHIC 
PLATE 
OBJECTIVE 
LENS 
AUXILIARY 
LENS 
Fig. 4 — Optical duplexing system 
EROS VIDEO 
um OUTPUT TO 
=. CORRELATOR 
  
  
   
  
  
  
  
    
BLUE 
FILTER 
  
   
  
    
  
  
PHOTO- 
MULTIPLIER 
TUBE 1 
  
DICHROIC 
MIRROR 
  
EYEPIECE F5 
Ÿ