<s>
A	O
holographic	B-Algorithm
screen	I-Algorithm
is	O
a	O
two-dimensional	O
display	O
technology	O
that	O
uses	O
coated	O
glass	O
media	O
for	O
the	O
projection	O
surface	O
of	O
a	O
video	B-Device
projector	I-Device
.	O
</s>
<s>
"	O
Holographic	B-Algorithm
"	O
refers	O
not	O
to	O
a	O
stereoscopic	O
effect	O
,	O
but	O
to	O
the	O
coating	O
that	O
bundles	O
light	O
using	O
formed	O
microlenses	O
.	O
</s>
<s>
The	O
lens	O
design	O
and	O
attributes	O
match	O
the	O
holographic	B-Algorithm
area	O
.	O
</s>
<s>
The	O
lenses	O
may	O
appear	O
similar	O
to	O
the	O
fresnel	O
lenses	O
used	O
in	O
overhead	B-Device
projectors	I-Device
.	O
</s>
<s>
The	O
display	O
design	O
can	O
use	O
either	O
front	O
or	O
rear	O
projection	O
,	O
in	O
which	O
one	O
or	O
more	O
video	B-Device
projectors	I-Device
are	O
directed	O
at	O
the	O
glass	O
plate	O
.	O
</s>
<s>
Each	O
projector	B-Application
's	O
beam	O
widens	O
as	O
it	O
approaches	O
the	O
surface	O
and	O
then	O
is	O
bundled	O
again	O
by	O
the	O
lenses	O
 '	O
arrangement	O
on	O
the	O
glass	O
.	O
</s>
<s>
Interactive	O
holographic	B-Algorithm
screens	I-Algorithm
add	O
gesture	O
support	O
to	O
holographic	B-Algorithm
screens	I-Algorithm
.	O
</s>
<s>
The	O
computer	O
sends	O
the	O
image	O
to	O
the	O
projector	B-Application
.	O
</s>
<s>
The	O
projector	B-Application
generates	O
light	O
beams	O
which	O
form	O
the	O
image	O
on	O
the	O
screen	O
.	O
</s>
<s>
The	O
projector	B-Application
generates	O
the	O
beams	O
of	O
light	O
that	O
will	O
form	O
the	O
image	O
on	O
the	O
screen	O
's	O
film	O
,	O
which	O
is	O
adhered	O
to	O
the	O
crystal	O
support	O
.	O
</s>
<s>
The	O
projector	B-Application
is	O
usually	O
located	O
behind	O
the	O
screen	O
and	O
must	O
be	O
placed	O
a	O
certain	O
angle	O
above	O
or	O
below	O
the	O
user	O
's	O
line	O
of	O
sight	O
to	O
avoid	O
the	O
dazzling	O
the	O
user	O
.	O
</s>
<s>
Therefore	O
,	O
it	O
must	O
be	O
trapezoidal	O
projector	B-Application
,	O
so	O
it	O
can	O
compensate	O
for	O
the	O
deforming	O
of	O
the	O
images	O
at	O
this	O
angle	O
of	O
displacement	O
.	O
</s>
<s>
An	O
interactive	O
holographic	B-Algorithm
screen	I-Algorithm
can	O
be	O
mounted	O
on	O
the	O
shop	O
windows	O
so	O
that	O
passersby	O
can	O
interact	O
with	O
it	O
.	O
</s>
<s>
Non-interactive	O
holographic	B-Algorithm
screens	I-Algorithm
in	O
shop	O
windows	O
can	O
be	O
coupled	O
with	O
artificial	O
vision	O
software	O
to	O
adapt	O
ads	O
based	O
on	O
the	O
viewer	O
's	O
characteristics	O
(	O
age	O
,	O
sex	O
,	O
etc	O
.	O
</s>
<s>
These	O
types	O
of	O
screens	O
are	O
often	O
used	O
for	O
the	O
display	O
of	O
Vocaloids	B-Application
at	O
concerts	O
because	O
they	O
simulate	O
the	O
illusion	O
of	O
a	O
holographically-projected	O
virtual	O
performer	O
.	O
</s>
