Demonstration of 17 cm robust carbon fiber deformable mirror for adaptive optics

Details Demonstration of 17 cm robust carbon fiber deformable mirror for adaptive optics Demonstration of 17 cm robust carbon fiber deformable mirror for adaptive optics

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spie.8149e..11a&link_type=abstract

Astronomical Adaptive Optics Systems and Applications IV. Edited by Tyson, Robert K.; Hart, Michael. Proceedings of the SPIE,

Physics

Optics

Scientific paper

Carbon-fiber reinforced polymer (CFRP) composite is an attractive material for fabrication of optics due to its high stiffness-to-weight ratio, robustness, zero coefficient of thermal expansion (CTE), and the ability to replicate multiple optics from the same mandrel. We use 8 and 17 cm prototype CFRP thin-shell deformable mirrors to show that residual CTE variation may be addressed with mounted actuators for a variety of mirror sizes. We present measurements of surface quality at a range of temperatures characteristic of mountaintop observatories. For the 8 cm piece, the figure error of the Al-coated reflective surface under best actuator correction is ~43 nm RMS. The 8 cm mirror has a low surface error internal to the outer ring of actuators (17 nm RMS at 20°C and 33 nm RMS at -5°C). Surface roughness is low (< 3 nm P-V) at a variety of temperatures. We present new figure quality measurements of the larger 17 cm mirror, showing that the intra-actuator figure error internal to the outer ring of actuators (38 nm RMS surface with one-third the actuator density of the 8 cm mirror) does not scale sharply with mirror diameter.

Affiliated with

Also associated with

No associations

Rating

Demonstration of 17 cm robust carbon fiber deformable mirror for adaptive optics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Demonstration of 17 cm robust carbon fiber deformable mirror for adaptive optics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Demonstration of 17 cm robust carbon fiber deformable mirror for adaptive optics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1461580