Fabrication and testing of phase masks for optical vortex coronagraph to observe extrasolar planets

E. Mari; F. Tamburini; C. Barbieri; A. Bianchini; M. Prasciolu; M. Massari; F. Romanato

doi:10.1117/12.855780

15 July 2010 Fabrication and testing of phase masks for optical vortex coronagraph to observe extrasolar planets

E. Mari, F. Tamburini, C. Barbieri, A. Bianchini, M. Prasciolu, M. Massari, F. Romanato

Proceedings Volume 7735, Ground-based and Airborne Instrumentation for Astronomy III; 773534 (2010) https://doi.org/10.1117/12.855780
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

Citation Download Citation

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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