-8- 
Figure 6 is a system block diagram of the ARES device. It will be notic 
that ARES consists essentially of separate closed TV systems for the left 
right stereo channels. The video signals representing the images are generate 
in the multiplier phototubes of each scanner and are applied, after enhance^- 
and amplification, to the intensity electrodes of their respective cathode rav' 
tubes in the viewer. 
RASTER 
GENERATOR 
3.0 
w 
r 
L. 
V 
cn 
VIEWER 1.0 
TRANSFOR 
MATION 
CIRCUITS 
7.0 
iiumi: 
REGISTRATION 
ANALYZER 
6.0 
r 
PARALLAX 
ANALYZER 
5.0 
—ar~ 
-s 
-o- 
-*0 
FIRST a SECOND ORDER 
TRANSFORMATION 
ERROR SIGNALS 
-COMPOSITE REGISTRATION 
ERROR SIGNALS 
-X PARALLAX 
ERROR SIGNAL 
*Y PARALLAX 
ERROR SIGNAL 
VIDEO 
PROCESSOR 
4,0 
PHOTOGRAPHS 
MULTIPLIER 
PHOTOTUBES 
FLYING-SPOT 
SCANNERS 
2.0 
VIDEO 
PROCESSOR 
4.0 
Figure 6,- System block diagram. 
The raster generator produces waveforms which, when amplified and applied 
to the deflection system of the cathode ray tubes, produce the required scan 
ning pattern or raster on the faces of the tubes. The parallax analyzer 
observes the video signals and detects therein differences in timing between 
corresponding detail in the left and right channels. The parallax analyzer 
also receives reference signals from the raster generator which indicate the 
scanning spot position in the X and Y directions separately. From these 
four input signals, that is, the left and right video signals and the X 
and Y spot coordinates, the parallax analyzer computes the direction of 
parallax errors and delivers this information in the form of X and Y 
parallax error signals. 
The parallax error signals generated by the parallax analyzer represent 
the X and Y parallax between the left and right images each averaged 
over the entire superimposed area. These signals are used to translate the 
rasters on the photographs thereby to shift the viewed images in opposite 
directions until average registration is achieved. Such shift could be 
applied to the raster of either the left or the right cathode ray tube. 
However, since the area of the cathode ray tube face is limited, it was 
decided to apply the shift to both cathode ray tubes but in opposite sense 
in order to provide a greater range of control than would be possible by 
shifting the raster of one tube only. 
jYf