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Proceedings Paper

Multiband filters for near-infrared astronomical applications
Author(s): James E. Rhoads; Sangeeta Malhotra; Paul Scowen; Ron Probst; Don McCarthy
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Paper Abstract

Filters for astronomical imaging traditionally have a simple bandpass that admits (more or less equally) all the photons within some bandwith ▵λ around some central wavelength λ0. However, there are situations where not all photons are equally desirable. We plan to develop and apply multiband filters for practical astronomical application. A multiband filter is a bandpass filter whose transmission dips to zero at select, undesired wavelength ranges. Anticipated applications include (i) OH-suppressing filters, especially in the J band (λc ≈ 1.2μm); (ii) economy of filter slots through multi-band filters used in series with broad blocking filters; and (iii) efficient searches for object classes with highly structured spectra. We present the design and anticipated photometric properties of a prototype reduced-background JR filter, which we plan to buy and test in 2010.

Paper Details

Date Published: 20 July 2010
PDF: 9 pages
Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77356C (20 July 2010); doi: 10.1117/12.856737
Show Author Affiliations
James E. Rhoads, Arizona State Univ. (United States)
Sangeeta Malhotra, Arizona State Univ. (United States)
Paul Scowen, Arizona State Univ. (United States)
Ron Probst, National Optical Astronomy Observatory (United States)
Don McCarthy, Steward Observatory, The Univ. of Arizona (United States)

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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