Lt 
Figure 2 shows a view of one of the pre- 
cision tables with its cover open. The 
table consists of an extremely stable (and 
hence heavy) base in which a television- 
like “camera” in the form of a flying- 
spot scanner assembly is inserted on 
precision slides and locked in place. 
Directly above the scanner is the imaging 
lens and above it, visible in the open 
cover, is the photomultiplier used to pick 
up the light from the scanner as modu- 
lated by the imagery in the diapositives. 
Figure 3 shows the table with its 
cover removed so that the diapositive 
carriage can be seen. The lower car- 
riage moves through 18 inches, rolling 
on a precision ball-bearing V-groove way 
assembly (foreground) and on a roller and 
floating way assembly (background); the 
associated measuring element is mounted 
alongside the V way. The upper carriage 
moves through 9 inches on a similar way 
assembly mounted atop the lower car- 
  
  
PHOTOMULTIPLIER 
     
   
    
  
DIAPOSITIVE 
CARRIAGE 
4. 
r 
SCANNER 
LOCK 
ves ^ 
ASSEMBLY 
  
  
FIGURE 2-UNAMACE Scanning Table 
riage. The upper carriage is arranged 
to carry diapositives of up to 9- by 18- 
inch format or sensitized film sheets (in 
light-tight holders) for use in preparing the 
output products. In operation, the cathode- 
ray tube scans a diapositive as a step in 
obtaining electrical signals corresponding 
to the imagery on the diapositive or scans 
a film sheet to expose an output product. 
  
9-BY 18-INCH DIAPOSITIVE HOLDER 
IMAGING LENS 
FLOATING WAYS —áa- 
Y-AXIS BALL-BEARING 
V-GROOVE WAY 
  
    
  
     
      
X-AXIS RECIRCULATING 
BALL-NUT LEAD SCREW 
  
  
FIGURE 3—Working Elements of the UNAMACE Table 
3