<s>
Spinning	B-Algorithm
mirror	I-Algorithm
systems	I-Algorithm
are	O
used	O
to	O
build	O
interactive	O
3D	O
graphics	O
and	O
autostereoscopic	B-Algorithm
visuals	O
visible	O
to	O
multiple	O
simultaneous	O
viewers	O
,	O
since	O
a	O
different	O
view	O
can	O
be	O
perceived	O
by	O
each	O
viewer	O
depending	O
on	O
the	O
angle	O
of	O
vision	O
.	O
</s>
<s>
Because	O
light	O
is	O
reflected	O
directly	O
from	O
the	O
projector	O
to	O
the	O
audience	O
and	O
not	O
projected	O
onto	O
a	O
fixed	O
plane	O
,	O
spinning	B-Algorithm
mirror	I-Algorithm
systems	I-Algorithm
create	O
a	O
correct	O
interpretation	O
of	O
the	O
field	O
of	O
light	O
regardless	O
of	O
a	O
spectator	O
's	O
position	O
relative	O
to	O
the	O
system	O
.	O
</s>
<s>
Because	O
such	O
systems	O
are	O
tied	O
to	O
a	O
high	B-Device
speed	I-Device
video	I-Device
projector	I-Device
,	O
the	O
system	O
's	O
maximum	O
resolution	O
of	O
unique	O
angles	O
is	O
limited	O
by	O
the	O
projector	O
's	O
maximum	O
framerate	O
.	O
</s>
<s>
A	O
similar	O
system	O
was	O
commercially	O
released	O
in	O
1981	O
for	O
the	O
Entex	B-Application
Adventure	I-Application
Vision	I-Application
game	O
console	O
.	O
</s>
<s>
Previous	O
volumetric	B-Algorithm
systems	I-Algorithm
projected	O
the	O
images	O
in	O
a	O
diffuse	O
plane	O
of	O
rotation	O
,	O
thus	O
,	O
the	O
light	O
was	O
remaining	O
dispersed	O
in	O
all	O
directions	O
.	O
</s>
<s>
Unfortunately	O
,	O
these	O
displays	O
could	O
not	O
recreate	O
dependent	O
effects	O
such	O
as	O
occlusion	B-Algorithm
.	O
</s>
<s>
Thus	O
,	O
create	O
a	O
system	O
of	O
gyratory	O
mirrors	O
covered	O
by	O
a	O
holographic	B-Algorithm
diffuser	I-Algorithm
anisotropic	I-Algorithm
.	O
</s>
<s>
The	O
mirrored	O
surface	O
reflects	O
each	O
projector	B-Algorithm
pixel	I-Algorithm
to	O
a	O
narrow	O
range	O
of	O
viewpoints	O
.	O
</s>
<s>
The	O
holographic	B-Algorithm
diffuser	I-Algorithm
provides	O
control	O
over	O
the	O
width	O
and	O
height	O
of	O
this	O
region	O
.	O
</s>
<s>
The	O
anisotropic	B-Algorithm
holographic	I-Algorithm
diffuser	I-Algorithm
and	O
mirror	O
assembly	O
are	O
mounted	O
on	O
a	O
carbon	O
fiber	O
panel	O
and	O
attached	O
to	O
an	O
aluminum	O
flywheel	O
at	O
45°	O
.	O
</s>
<s>
In	O
this	O
section	O
we	O
describe	O
how	O
to	O
render	O
a	O
scene	O
to	O
the	O
3D	B-Algorithm
display	I-Algorithm
with	O
correct	O
perspective	O
,	O
using	O
either	O
scanline	B-Algorithm
rendering	I-Algorithm
or	O
ray	B-Algorithm
tracing	I-Algorithm
.	O
</s>
<s>
We	O
assume	O
that	O
the	O
spinning	O
mirror	O
is	O
centered	O
at	O
the	O
origin	O
and	O
that	O
its	O
axis	O
of	O
rotation	O
is	O
the	O
vertical	O
y-axis	O
,	O
with	O
the	O
video	B-Device
projector	I-Device
at	O
the	O
nodal	O
point	O
P	O
above	O
the	O
mirror	O
as	O
in	O
top	O
figure	O
.	O
</s>
<s>
By	O
the	O
rotational	O
symmetry	O
of	O
our	O
system	O
,	O
we	O
can	O
produce	O
perspective-correct	O
imagery	O
for	O
any	O
viewing	O
position	O
on	O
the	O
circle	O
V	O
defined	O
by	O
h	O
and	O
d	O
,	O
yielding	O
binocular	B-Algorithm
images	O
for	O
a	O
viewer	O
facing	O
the	O
display	O
since	O
h	O
and	O
d	O
will	O
be	O
similar	O
for	O
both	O
eyes	O
.	O
</s>
<s>
For	O
each	O
side	O
of	O
the	O
tent	O
,	O
we	O
place	O
a	O
color	O
filter	O
between	O
the	O
holographic	B-Algorithm
diffusing	O
film	O
and	O
the	O
first-surface	O
mirror	O
,	O
which	O
avoids	O
introducing	O
specular	O
first-surface	O
reflections	O
.	O
</s>
<s>
System	O
Maeda	O
[	O
Maeda	O
,	O
2003 ]	O
:	O
it	O
is	O
based	O
on	O
a	O
system	O
of	O
a	O
monitor	O
of	O
gyratory	O
LCD	B-Device
.	O
</s>
<s>
3D	B-Application
Videoconference	I-Application
[	O
California	O
,	O
2009 ]	O
:	O
It	O
is	O
based	O
on	O
a	O
structure	O
composed	O
of	O
two	O
mirrors	O
on	O
those	O
who	O
reflect	O
the	O
images	O
and	O
create	O
different	O
perspectives	O
about	O
his	O
360	O
degrees	O
.	O
</s>
<s>
Autostereoscopic	B-Algorithm
3D	B-Algorithm
displays	I-Algorithm
.	O
</s>
<s>
Volumetric	B-Algorithm
3D	I-Algorithm
displays	I-Algorithm
and	O
application	O
infrastructure	O
.	O
</s>
<s>
A	O
large	O
scale	O
interactive	O
holographic	B-Algorithm
display	O
.	O
</s>
