The Four Quadrant-ZOG and Annular Groove Phase Mask Coronagraphs
Abstract
Phase mask coronagraphy is a technique aiming at accommodating both high dynamic and high angular resolution imaging of faint sources around bright objects such as exo-planets orbiting their parent stars or host galaxies around Active Galactic Nuclei. We present two new phase mask coronagraphs implemented with subwavelength diffractive optical elements consisting of optimized surface-relief gratings. The first one is an evolution of the Four Quadrant Phase Mask coronagraph, which resolves the π phase shift chromaticity problem: the Four Quadrant Zeroth Order Grating (4QZOG). The second one is a totally new design consisting of an optical vortex induced by a space-variant grating: the Annular Groove Phase Mask (AGPM) coronagraph is fully symmetric and free from any "shaded zones". Some manufacturing hints are given.
Additional Information
© 2005 Society of Photo-Optical Instrumentation Engineers (SPIE). October 05, 2005. D. Mawet acknowledges the financial support of the Belgian "Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture". P. Riaud and J. Surdej acknowledges the financial support of the "Pôle d'Attraction Inter-Universitaire".Attached Files
Published - 396505.pdf
Files
| Name | Size | Download all |
|---|---|---|
|
md5:69c95a907b17d7bf025a5e285bde5d9b
|
702.7 kB | Preview Download |
Additional details
- Eprint ID
- 57872
- Resolver ID
- CaltechAUTHORS:20150527-145843389
- Fonds pour la Formation à la Recherche dans l'índustrie et dans l'Ágriculture (FRIA-Belgium)
- Pôle d'Attraction Inter-Universitaire
- Created
-
2015-05-27Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 5905