@inbook{a990dd5379f7417396f6c0b5b477af8e,
title = "Development of the wide-field IFU PPak",
abstract = "PPak is a new fiber-bundle, developed at the Astrophysical Institute Potsdam for the existing PMAS 3D-instrument. The intention of PPak is to provide a large integral field-of-view in combination with a large collecting area per fiber for the study of extended low-surface brightness objects. The PPak system consists of a focal reducer lens and a fiber bundle, featuring an innovative design with object, sky and calibration fibers. With a field-of-view of 74 x 65 arcseconds, PPak currently is the world's widest integral field unit that provides a semi-contiguous regular sampling of extended astronomical objects. Its pre-optics and fiber-diameter, combined with the versatility and efficiency of the PMAS spectrograph, allows PPak to make a unique trade-off between total light-collecting power and spectral resolution.",
author = "Andreas Kelz and Marc Verheijen and Roth, {Martin M.} and Uwe Laux and Svend-Marian Bauer",
year = "2004",
month = sep,
day = "1",
doi = "10.1117/12.551990",
language = "English",
isbn = " 0-8194-5424-9",
series = "Proceedings of the SPIE",
publisher = "The International Society for Optical Engineering",
pages = "719--730",
editor = "Moorwood, {Alan F.M.} and Iye Masanori",
booktitle = "Ground-based instrumentation for astronomy",
}