First light with a carbon fiber reinforced polymer 0.4 meter telescope
2014
For the passed several years, the Naval Research Laboratory (NRL) has
been investigating the use of Carbon Fiber Reinforced Polymer (CFRP)
material in the construction of a telescope assembly including the optical
components. The NRL, Sandia National Laboratories (SNL), and
Composite Mirror Applications, Inc. (CMA) have jointly assembled a
prototype telescope and achieved “first light” images with a CFRP 0.4 m
aperture telescope. CFRP offers several advantages over traditional
materials such as creating structures that are lightweight and low
coefficient of thermal expansion and conductivity. The telescope’s
primary and secondary mirrors are not made from glass, but CFRP, as
well. The entire telescope weighs approximately 10 kg while a typical
telescope of this size would weigh quite a bit more. We present the
achievement of “first light” with this telescope demonstrating the imaging
capabilities of this prototype and the optical surface quality of the mirrors
with images taken during a day’s quiescent periods.
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