15 September 2011 Diamond turned high precision PIAA optics and four mirror PIAA system for high contrast imaging of exo-planets
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Proceedings Volume 8151, Techniques and Instrumentation for Detection of Exoplanets V; 815105 (2011); doi: 10.1117/12.892849
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States
Abstract
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.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kunjithapatham Balasubramanian, Eric Cady, Laurent Pueyo, Xin An, Stuart Shaklan, Olivier Guyon, Ruslan Belikov, "Diamond turned high precision PIAA optics and four mirror PIAA system for high contrast imaging of exo-planets", Proc. SPIE 8151, Techniques and Instrumentation for Detection of Exoplanets V, 815105 (15 September 2011); doi: 10.1117/12.892849; https://doi.org/10.1117/12.892849
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KEYWORDS
Mirrors

Manufacturing

Imaging systems

Coronagraphy

Wavefronts

Diamond

Diffraction

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