TM 5-6675-323-14
STEREOMETER PARALLAX BAR
Section I
INTRODUCTION
GENERAL INFORMATION.
10-1.1 Scope.
a.
M o d e l Number and Equipment Name. Stereometer parallax bar.
b. Purpose of Equipment.
T o determine height differences when viewing
stereoscopic photographs.
Glossary.
Absolute
Altitude
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. Altitude of aircraft
above surface of earth.
. M a r k s on edge of photo-
Fiducial
Mark
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graph to indicate optical
center of photograph.
. Small linear displacement
Differential
Parallax
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b e t w e e n same photographic
i m a g e s on different pho-
tographs resulting from
height of surface.
Principal Point on Photograph . . . . . . . . Center of one photograph
that can be transferred
to adjacent stereophoto-
graph.
Stereo-Pair
Photographs
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Photographs taken at dif-
ferent positions showing
same features.
