Dr. Ulrich Papenburg Profile

Dr. Ulrich Papenburg

Managing Director at IBCOL Composites GmbH

SPIE Involvement:

Author

Proceedings Article | 6 March 2001 Paper

C/SiC high-precision lightweight components for optomechanical applications

Claus Mueller, Ulrich Papenburg, William Goodman, Marc Jacoby

Proceedings Volume 4198, (2001) https://doi.org/10.1117/12.417348

KEYWORDS: Carbon, Silicon carbide, Mirrors, Silicon, Cladding, Optics manufacturing, Polishing, Surface finishing, Ceramics, Temperature metrology

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Proceedings Article | 28 July 2000 Paper

C/SiC advanced mirror system demonstrator design

Brian Catanzaro, Gregory Mehle, Martin Seilonen, Ulrich Papenburg, Claus Mueller, Wilhelm Pfrang, G. Siegfried Kutter, Eric Ruch, Renaud Mercier-Ythier, Paul Lightsey, Scott Streetman, Douglas Neam

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.394004

KEYWORDS: Mirrors, Carbon, Actuators, Space telescopes, Silicon carbide, Structured optical fibers, Composites, Manufacturing, Ceramics, Telescopes

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Proceedings Article | 11 November 1999 Paper

Optical and optomechanical ultralightweight C/SiC components

Ulrich Papenburg, Wilhelm Pfrang, G. Kutter, Claus Mueller, Bernd Kunkel, Michael Deyerler, Stefan Bauereisen

Proceedings Volume 3782, (1999) https://doi.org/10.1117/12.369180

KEYWORDS: Mirrors, Silicon carbide, Carbon, Optics manufacturing, Silicon, Ceramics, Cladding, Polishing, Surface finishing, Composites

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Proceedings Article | 13 October 1997 Paper

Design, manufacturing, and performance of C/SiC mirrors and structures

Michael Deyerler, Stefan Bauereisen, Ulrich Papenburg

Proceedings Volume 3132, (1997) https://doi.org/10.1117/12.284077

KEYWORDS: Mirrors, Ceramics, Surface finishing, Silicon carbide, Manufacturing, Carbon, Coating, Silicon, Reflectors, Polishing

Proceedings Article | 30 September 1994 Paper

Development of an ultra-lightweight scanning mirror for the optical imager of the second generation METEOSAT (MSG)

Bernd Harnisch, A. Pradier, Michael Deyerler, Bernd Kunkel, Ulrich Papenburg

Proceedings Volume 2210, (1994) https://doi.org/10.1117/12.188099

KEYWORDS: Mirrors, Silicon carbide, Silicon, Polishing, Optics manufacturing, Carbon, Chemical vapor deposition, Coating, Surface finishing, Imaging systems

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A new material designated C/SiC is the basis for a current ultra-lightweight scan mirror (ULSM) ESA/ESTEC technology development contract for the METEOSAT Second Generation (MSG) Program (Ref. {1}). It consists of random- oriented carbon fibers as 'greenbody' which is shaped to the designed configuration, and is infiltrated in the liquid phase with Si resulting in a SiC enriched surface layer, with a CVD grown SiC optical polishing layer. The reflective coating finally is silver under a dedicated protection layer. The requirements for this mirror are rather stringent: during 7 years in a geostationary orbit of life it will permantly be exposed to centrifugal forces induced by the satellite spinning at 100 rpm. Due to high image quality requirements for the imager - designated SEVIRI (Spinning Enhanced Visible IR Imager) - the MTF degradation caused by the scan mirror alone are defined to <EQ 3%, resulting in rather high surface quality requirements. The main contribution is the spin induced mirror tip deflection which turned out to be the design driver. The technologically most challenging requirement is to develop a scan mirror with 800 X 500 mm² effective aperture and a central cutout - the telescope is a Gregory concept - to withstand tight environmental requirements at a mass which was specified as < 6 kg. The ESA contract covers a baseline concept with the subsequently presented design of a monolithic C/SiC mirror, mated to a CFRP structure by isostatic mounts. At the end of this technology program, a fully tested 1:1 scale mirror with silver and protection coating will be rendered to ESA. Since this contract is a technology contract, applications beyond the MSG scan mirror are borne in mind, including higher optical surface qualities such as (lambda) /30 or curved surfaces, also aspheric mirrors of possibly even larger diameters. The manufacturing and optical process implement subcontractors which are not listed among the authors, i.e. SGL Carbon/Meitingen, FRG, for the Si infiltration; Schunk Kohlenstofftechnik/GieBen, FRG, for the CVD SiC coating; REOSC Optique, Ballainvilliers, France for the optical polishing, and Jenoptik, Jena, FRG, for the silver and protection coating.

Conference Committee Involvement (1)

Optical Materials and Structures Technologies

4 August 2003 | San Diego, California, United States

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