Multi-band filters for near-infrared astronomical applications

James E. Rhoads, Sangeeta Malhotra, Paul Scowen, Ron Probst, Donald W Mccarthy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Filters for astronomical imaging traditionally have a simple bandpass that admits (more or less equally) all the photons within some bandwith Δλ 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.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7735
EditionPART 1
DOIs
Publication statusPublished - 2010
EventGround-Based and Airborne Instrumentation for Astronomy III - San Diego, CA, United States
Duration: Jun 27 2010Jul 2 2010

Other

OtherGround-Based and Airborne Instrumentation for Astronomy III
CountryUnited States
CitySan Diego, CA
Period6/27/107/2/10

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Keywords

  • Filters
  • OH suppression

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Rhoads, J. E., Malhotra, S., Scowen, P., Probst, R., & Mccarthy, D. W. (2010). Multi-band filters for near-infrared astronomical applications. In Proceedings of SPIE - The International Society for Optical Engineering (PART 1 ed., Vol. 7735). [77356C] https://doi.org/10.1117/12.856737