The PMAS telescope module: Opto-mechanical design and manufacture

PMAS, the Potsdam Multi-Aperture Spectrophotometer, has a modular layout which was intended to provide for flexible operation as a travelling instrument and to accomodate different telescopes. The Telescope Module is the part of the instrument which serves the purpose of mechanical and optical interfacing to the telescope. It contains optical systems to re-image the telescope focal plane onto the lens array, to illuminate the lens array from an internal calibration light source, and to observe an area around the 3D spectroscopy field-of-view with a guiding, and for the simultaneous determination of point-spread-function cryogenic CCD system for acquisition, templates for 3D deconvolution. We discuss the opto-mechanical design and manufacture of these subsystems.