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Proceedings Paper

Fabrication and testing of phase masks for optical vortex coronagraph to observe extrasolar planets
Author(s): E. Mari; F. Tamburini; C. Barbieri; A. Bianchini; M. Prasciolu; M. Massari; F. Romanato
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Paper 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.

Paper Details

Date Published: 15 July 2010
PDF: 8 pages
Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 773534 (15 July 2010);
Show Author Affiliations
E. Mari, Univ. of Padua (Italy)
F. Tamburini, Univ. of Padua (Italy)
C. Barbieri, Univ. of Padua (Italy)
A. Bianchini, Univ. of Padua (Italy)
M. Prasciolu, Lab. Nazionale TASC, Istituto Officina dei Materiali, CNR (Italy)
M. Massari, Univ. of Padua (United States)
Lab. for Nanofabrication of Nanodevices, Veneto Nanotech (Italy)
F. Romanato, Univ. of Padua (Italy)
Lab. Nazionale TASC, Istituto Officina dei Materiali, CNR (Italy)
Lab. for Nanofabrication of Nanodevices, Veneto Nanotech (Italy)


Published in SPIE Proceedings Vol. 7735:
Ground-based and Airborne Instrumentation for Astronomy III
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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