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