A Tunable Echelle Imager

Details A Tunable Echelle Imager A Tunable Echelle Imager

2000-04-27

arxiv.org/abs/astro-ph/0004372v1

Publ.Astron.Soc.Pacific112:1112-1120, 2000

Astronomy and Astrophysics

Astrophysics

11 pages, 12 figures, accepted by PASP

Scientific paper

10.1086/316604

We describe and evaluate a new instrument design called a Tunable Echelle Imager (TEI). In this instrument, the output from an imaging Fabry-Perot interferometer is cross-dispersed by a grism in one direction and dispersed by an echelle grating in the perpendicular direction. This forms a mosaic of different narrow-band images of the same field on a detector. It offers a distinct wavelength multiplex advantage over a traditional imaging Fabry-Perot device. Potential applications of the TEI include spectrophotometric imaging and OH-suppressed imaging by rejection.

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