18 August 2005 Three-dimensional spectroscopy with a fiber-fed NUV spectrograph
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Abstract
In the context of the NASA balloon borne experiment named Fireball (Faint Intergalactic Redshifted Emission BALLoon) dedicated to map the Intergalactic Medium, we designed a fiber-fed near ultraviolet spectrograph to work in the 200 nm atmospheric transmission window. We first describe the system level optimization leading to the atypical use in UV of a fiber Integral Field Unit at the focus of a one meter diameter parabolic mirror. For the qualification of the design we measured the absolute transmission of an UV polyimide 100 microns core fiber. The fiber bundle made of 400 fibers rearranged in a 50 mm slit feeds an F/2.5 spectrograph based on an Offner Littrow mount. We present the optical performances of this design with a high throughput and a well matched aperture ratio.
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Robert Grange, Bruno Milliard, Ryan McLean, Christopher Martin, Jean Michel Deharveng, David Schiminovich, "Three-dimensional spectroscopy with a fiber-fed NUV spectrograph", Proc. SPIE 5898, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIV, 589812 (18 August 2005); doi: 10.1117/12.616934; https://doi.org/10.1117/12.616934
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