324 THREE-DIMENSIONAL PHOTOGRAPHY
S. vision.-Normal, binocular human vi-
sion in stereoscopic. Many beginners
seem to think that “stereoscopic” ap-
plies only to stereo reproduction. Stereo-
scopic vision is normal, everyday vision
enjoyed by most of us.
Stereo-Vivid (Trade name, also T.D.C.).-
Generic name for a polarizing stereo pro-
jector, a 35mm stereo camera and a com-
panion 35mm stereoscope, made by the
Three Dimension Company.
Subjective.-In stereo, the final step of
stereo perception, the consciousness of the
image, the actual step of “seeing” as op-
posed to the purely physical, physiological
and neurological steps.
S. anomaly.-The failure of subjective
interpretation to conform to stereo the-
ory. Two identical prints (pseudostereo-
scopic) mounted as a stereogram when
viewed in the stereoscope should appear
as images of gigantic size located at in-
finity. In fact there is no such appear-
ance at all. There is no depth of any
kind or degree visible. There are many
such effects which can be predicted but
which rarely are experienced as a part
of the subjective interpretation.
S. stereo.-That part of stereoscopy
which has to do with the interpretation
of stereo synthesis; the actual “seeing”
as contrasted with geometric and phys-
iological stereoscopy.
Televiewer (Trade name).-Stereoscope of
Brewster type in metal construction.
j-D.-PoDular abbreviation for Three Di-
mensional. Also polarizing goggles made
for viewing projected stereograms and
Vectographs.
Three dimensional.-Having an appear-
ance of depth or solidity, but not neces-
sarily of stereoscopic quality. Monocular
liewers give a three dimensional but not
a stereoscopic appearance.
Te1estereoscope.-This is a viewer which
resembles a pair of opera glasses and is
used for the examination of large size
stereo pairs, (aerial, X-ray and the like) or
stereo pairs projected side by side. Fusion
is accomplished through the use of rock-
ing prisms.
Twister.-A stereogram so mounted that
the eyes are strained in trying to view it.
Unit magnification.-The principle which
states that any photograph should be
viewed from a distance equal to the focal
length of the taking lens. When extended
to stereo this principle becomes that of
orthos tereoscopy.
Vectograph.-A stereogram made by plac-
ing polarizing images upon both sides of
an optically active base. Viewed with po-
larizing goggles.
Verascope (Trade name).-Generic name
for cameras made by Jules Richard of
Paris, also extended to the 35mm model.
Verascope F-40.-An improved 35mm Vera-
scope camera distributed by Busch Camera
Corporation.
Videon.-A 35mm stereo camera.
Viewer.-See Stereoscope.
Aanaglyphic V.-(A) A mask or goggles
containing two differently colored lenses
or filters for viewing bichrome ana-
glyphs. (B) A similar device containing
polarizing filters set at go degrees to
each other for viewing polar anaglyphs.
Flicker V.-A hand held shutter for
viewing flicker projected images.
Viewmaster (Trade name).-Small stereo-
scope for viewing specially mounted 16mm
stereograms. Including those made with
the Sawyer Personal camera.
Window.-In a stereoscope the stereogram
appears as if seen through a window. The
“window” which may be a mask or simply
the way the unit prints are trimmed, may
be placed in any desired plane: but it is
usually placed nearer the observer than
any other unit of the picture.