Computer Science – Performance
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21915516c&link_type=abstract
American Astronomical Society, AAS Meeting #219, #155.16
Computer Science
Performance
Scientific paper
Phase-induced amplitude apodization (PIAA) coronagraphs are a promising technology for imaging exoplanets, with the potential to detect Earth-like planets around Sun-like stars. A PIAA system nominally consists of a pair of mirrors which reshape incident light losslessly. Unfortunately, diffraction limits their performance, and generally they are required to be coupled to an apodizing mask to achieve full performance, which attenuates the planet as well. In addition, these mirrors are highly aspheric and can be very expensive and difficult to manufacture. We propose an alternative: a low-sag four-mirror system with no post-apodization, which maintains high throughput and performance while allowing simplified manufacturing and significantly lower cost. The method of design is given, as well as the progress of the ongoing experimentation.
Balasubramanian Koushik
Cady Eric
Shaklan Stuart
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