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Proceedings Paper

Multi-notch holographic filters for atmospheric lines suppression
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Paper Abstract

Near-infrared emission from atmospheric OH radicals is known to severely affect astronomical observations. Until now, only complex dispersive instruments were partially capable of removing this unwanted background, which is composed of hundreds of narrow emission lines. Recent development in photosensitive glass and holographic recording technologies now allow the elaboration of filters with a large number of narrow reflecting bands well matched to OH lines. This technology shows promise for removing many tens of lines in the J, H, and K bands. That would result in a many fold increase in imaging and low resolution signal-to-noise ratio. Filters with 10 lines have been tested and show the appealing possibilities of these new devices.

Paper Details

Date Published: 24 September 2004
PDF: 8 pages
Proc. SPIE 5494, Optical Fabrication, Metrology, and Material Advancements for Telescopes, (24 September 2004); doi: 10.1117/12.552116
Show Author Affiliations
Sebastien Blais-Ouellette, Photon etc. inc. (Canada)
California Institute of Technology (United States)
Etienne Artigau, Photon etc. inc. (Canada)
Univ. de Montreal (Canada)
Frank Havermeyer, Ondax, Inc. (United States)
Keith Matthews, California Institute of Technology (United States)
Christophe Moser, Ondax, Inc. (United States)
Demetri Psaltis, California Institute of Technology (United States)
Gregory J. Steckman, Ondax, Inc. (United States)

Published in SPIE Proceedings Vol. 5494:
Optical Fabrication, Metrology, and Material Advancements for Telescopes
Eli Atad-Ettedgui; Philippe Dierickx, Editor(s)

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