  Polymer
Optics
Lenses and mirrors are vital for relaying information
around the globe, and millions of data-carrying signals are
bounced around the world via satellites. At each point along
a signal’s path, high-quality lenses and mirrors preserve
the integrity of the signal. If the shape of a mirror is slightly
deformed, the signal beam will become distorted. In addition,
if the mirror surface isn’t extremely smooth, the beam
will become blurred, and the signal may weaken.
Traditional Space Mirrors
Most traditional space mirrors are made of
materials such as beryllium or low expansion glasses. These
materials offer high thermal and mechanical stability. These
properties are important because a space mirror will likely
change temperatures and/or be bumped during use, and yet its
surface must remain relatively unaffected. For example, a
satellite mirror changes temperature drastically when it travels
in orbit from Earth’s shadow into the sunlight.
Polymer Mirror Structures
Although conventional mirror materials are
stable, they are difficult to process, making production lengthy
and costly. CRG is exploring processes and technologies that
will enable production of stable polymeric mirror structures
and surfaces. By using materials with high specific stiffness,
CRG is capable of producing very lightweight mirrors. In addition,
novel replication techniques could provide a quality mirror
surface without the grinding and polishing needed for traditional
mirror production. Polymeric mirrors can therefore be produced
in less time and at lower cost.
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