TY - GEN
T1 - Diamond turned high precision PIAA optics and four mirror PIAA system for high contrast imaging of exo-planets
AU - Balasubramanian, Kunjithapatham
AU - Cady, Eric
AU - Pueyo, Laurent
AU - An, Xin
AU - Shaklan, Stuart
AU - Guyon, Olivier
AU - Belikov, Ruslan
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - Coronagraphy
KW - PIAA
KW - diamond-turning
KW - phase-induced amplitude apodization
UR - http://www.scopus.com/inward/record.url?scp=80053463425&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80053463425&partnerID=8YFLogxK
U2 - 10.1117/12.892849
DO - 10.1117/12.892849
M3 - Conference contribution
AN - SCOPUS:80053463425
SN - 9780819487612
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Techniques and Instrumentation for Detection of Exoplanets V
T2 - Techniques and Instrumentation for Detection of Exoplanets V
Y2 - 23 August 2011 through 24 August 2011
ER -