Low-cost high-precision PIAA optics for high contrast imaging with exo-planet coronagraphs

Details Low-cost high-precision PIAA optics for high contrast imaging with exo-planet coronagraphs Low-cost high-precision PIAA optics for high contrast imaging with exo-planet coronagraphs

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7731e.155b&link_type=abstract

Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave. Edited by Oschmann, Jacobus M., Jr.; Clampin

Physics

Optics

1

Scientific paper

PIAA optics for high contrast imaging present challenges in manufacturing and testing due to their large surface departures from aspheric profiles at the aperture edges. With smaller form factors and consequent smaller surface deformations (<50 microns), fabrication of these mirrors with diamond turning followed by electron beam lithographic techniques becomes feasible. Though such a design reduces the system throughput to ~ 50%, it still provides good performance down to 2λ/D inner working angle. With new achromatic focal plane mask designs, the system performance can be further improved. We report on the design, expected performance, fabrication challenges, and initial assessment of such novel PIAA optics.

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