TM 5-6675-322-14
CHAPTER 5
LENS-PRISM-MIRROR STEREOSCOPE
Section I
INTRODUCTION
5 - 1.
GENERAL INFORMATION.
5 - 1 . 1 S c o p e .
a.
Model Number and Equipment Name.
Lens-Prism-Mirror Stereoscope.
b.
Purpose of Equipment.
Stereoscopic viewing of stereo-pair photographs and to
determine heights (when used with parallax bar).
5 - 1 . 2 G l o s s a r y.
Diopter . . . . . . . . . . . . . . . . . . . Measurement of lens Power and
r e f r a c t i o n.
Fiducial Mark. . . . . . . . . . . . . . . . Marks on edges of aerial photographs
used to determine center of photo-
graph.
Interpupillary Distance . . . . . . . . . . . Distance between center of
o b s e r v e r ’ s e y e s .
Principal Point of Photograph . . . . . . . . Center of photographic image.
Stereo-Pair Photograph . . . . . . . . . . .
Photographs taken of same object or
a r e a f r o m d i f f e r e n t p o s i t i o n s.
Stereoscopic . . . . . . . . . . . . . . . . An apparent three-dimensional image
obtained when viewing stereo-pair
photographs.
5 - 2.
EQUIPMENT DESCRIPTION.
5-2.1 Equipment Characteristics, Capabilities, and Features.
Removable binocular assembly permits full stereoscopic viewing of 9 in.
X 9 in. (22.9 cm x 22.9 cm) aerial photographs.
b.
Four-power magnification with binocular assembly.
c.
L i g h t w e i g h t.
d.
Folds for storage.
e .
Adjusts for uneven surface.
5-1
