■ 3D Displays
replace, displace or supplement that technology,” Thornton said.
In another instance, a glasses-free
three-dimensional display technology
is being developed by 3DIcon Corp. of
Tulsa, Okla. The company’s products send
two infrared laser beams into an imaging
medium, today composed of rare-earth-doped ZBLAN glass. At the point where
the lasers intersect, two-photon absorption gives rise to fluorescence and the
result is a 3D image.
The challenge is that the imaging
medium is not cheap. Hence, scaling
demonstration systems up beyond a
4-cm cube is not economically practical.
The company has therefore decided to
develop proprietary silicone polymers,
with the goal being the creation of one
that has the right electrical and optical
properties while meeting cost and weight
“We believe we have a viable solution
and that’s the direction we’re going right
now,” said Doug Freitag, vice president
of technology and business development.
As is presently done with the glass,
the polymer will be doped with a rare
earth to give it the right properties. The
dopant will probably determine the final
cost of the material. Freitag noted that the
current approach looks promising, but a
successful prototype must still be built.
He added that the company is developing
a family of polymers that could have a
number of other uses, including deposit-
ing silicon films for flexible transistors
A final example of a glasses-free 3D
display comes from Holografika Ltd. of
Budapest, Hungary. CEO Tibor Balogh
said that the company’s 3D light-field
displays average 100 million pixels and
can offer full-angle 180-degree viewing.
The goal of Holografika’s founders was to
Glasses-free 3D display technology could allow people to share and interact with a scene (above and at right).