Diamond turned high precision PIAA optics and four mirror PIAA system for high contrast imaging of exo-planets

Details Diamond turned high precision PIAA optics and four mirror PIAA system for high contrast imaging of exo-planets Diamond turned high precision PIAA optics and four mirror PIAA system for high contrast imaging of exo-planets

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spie.8151e...4b&link_type=abstract

Techniques and Instrumentation for Detection of Exoplanets V. Edited by Shaklan, Stuart. Proceedings of the SPIE, Volume 8151,

Physics

Optics

Scientific paper

Off-axis, high-sag PIAA optics for high contrast imaging present challenges in manufacturing and testing. With smaller form factors and consequently smaller surface deformations (< 80 microns), diamond turned fabrication of these mirrors becomes feasible. Though such a design reduces the system throughput, it still provides 2λ/D inner working angle. We report on the design, fabrication, measurements, and initial assessment of the novel PIAA optics in a coronagraph testbed. We also describe, for the first time, a four mirror PIAA coronagraph that relaxes apodizer requirements and significantly improves throughput while preserving the low-cost benefits.

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