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SD2320W | 2 | User's Guide
StereoMirror™ Technology
A StereoMirror™ monitor consists of two AMLCD (Active Matrix Liquid Crystal
Display) units, oriented at a 110º angle and mounted on a specially designed
stand. A passive beamsplitter mirror bisects the angle formed between the
two monitors, and there is a fine mechanical adjustment for the mirror angle
between the two displays. One side of the glass mirror has a reflective
coating, and the other side has an anti-reflective coating to minimize
secondary reflections. The mirror has been treated with a hard top
coating to accommodate cleaning.
In general, the objective of a stereoscopic display is to efficiently present a left
eye image solely to the left eye while the right eye image is directed to the
right eye. This allows the human visual system to merge the two images and
results in the perception of
depth, or stereopsis. In the
StereoMirror
™ design this
stereo separation is
achieved using the
principle of conservation
of polarization.
Liquid crystal displays
operate based on the
ability of liquid crystal
material to modulate
plane-polarized light.
The two AMLCDs in the
SD2320W model have
been manufactured so
that the polarized light
emitted from the top monitor is 90° rotated from that of the bottom monitor.
The image from the lower monitor is seen through the mirror, as shown in the
illustration above. When stereo pair images from the two monitors are
viewed through crossed-polarizing glasses (glasses with polarizing films
mounted on the eyepieces with their planes of polarization at a right angle to
one another), the user only sees the left eye image with the eyepiece having
the 0°-oriented polarizer and the right eye image with the eyepiece having
the 90° polarizer. Light with a perpendicular polarization is not transmitted.
The result is a single, fused stereoscopic image.
Bottom
Monitor
with Left
Eye Image
T
op
M
on
i
tor
w
i
th
R
i
g
h
t
E
y
e
I
m
a
g
e
Beamsplitter
Mirror
Left Eye
Right Eye
Bottom
Monitor
with Left
Eye Image
T
op
M
on
i
tor
w
i
th
R
i
g
h
t
E
y
e
I
m
a
g
e
Beamsplitter
Mirror
Left Eye
Right Eye
Operating principle of the StereoMirror monitor.