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15 July 2010 Fabrication and testing of phase masks for optical vortex coronagraph to observe extrasolar planets
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Abstract
The optical vortex coronagraph (OVC) is an innovative instrument that can be applied to both space and groundbased telescopes for direct imaging of planets around bright stars. OVC rejects the light of the on-axis star without altering that of off-axis sources, means of a spiral phase plate (SPP) used as a phase modyfing device (PMD). We present the fabrication process made by lithographic nanofabrication and tests for the characterization of two different high-quality SPPs.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
E. Mari, F. Tamburini, C. Barbieri, A. Bianchini, M. Prasciolu, M. Massari, and F. Romanato "Fabrication and testing of phase masks for optical vortex coronagraph to observe extrasolar planets", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 773534 (15 July 2010); https://doi.org/10.1117/12.855780
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