Mr. Ralph Schlegel Profile

Ralph Schlegel

at Fraunhofer IOF

SPIE Involvement:

Author

Publications (7)

Proceedings Article | 12 July 2023 Open Access

Realizing an all-glass beam splitter for space by using advanced joining technologies

Carolin Rothhardt, Pascal Birckigt, Kevin Grabowski, Stefan Risse, Ralph Schlegel, Svetlana Shestaeva, Stefan Schwinde, Sebastian Schmidl, Sylvio Klose

Proceedings Volume 12777, 1277719 (2023) https://doi.org/10.1117/12.2689276

KEYWORDS: Beam splitters, Coating, Prisms, Cryogenics, Silicates, Tunable filters, Surface finishing, Silicon, Tantalum, Astronomical imaging

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Proceedings Article | 29 August 2022 Presentation + Paper

Development of advanced silver coatings for telescope mirrors

S. Schwinde, S. Shestaeva, R. Holzlöhner, G. Willers, R. Schlegel, A. Förster, R. Parra, S. Guisard, O. Sqalli, S. Schröder

Proceedings Volume 12188, 121881X (2022) https://doi.org/10.1117/12.2627710

KEYWORDS: Reflectivity, Silver, Mirrors, Telescopes, Optical coatings, Aluminum, Reflector telescopes, Gemini Observatory, Gold, Ruthenium, Near ultraviolet

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Proceedings Article | 12 July 2019 Open Access

Protected silver coatings for reflectors

Stefan Schwinde, Mark Schürmann, Ralph Schlegel, Jan Kinast, Reinhold Dorn, Jean Louis Lizon, Sebastien Tordo, Norbert Kaiser

Proceedings Volume 11180, 111804M (2019) https://doi.org/10.1117/12.2536085

KEYWORDS: Silicon, Aluminum, Reflectors, Sputter deposition, Silver, Argon, Resistance, Reflectivity, Oxygen, Infrared spectroscopy

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Proceedings Article | 10 July 2018 Paper

Manufacturing of aluminum mirrors for cryogenic applications

Jan Kinast, Ralph Schlegel, Knut Kleinbauer, Ralf Steinkopf, Roman Follert, Reinhold Dorn, Jean Louis Lizon, Artie Hatzes, Andreas Tünnermann

Proceedings Volume 10706, 107063G (2018) https://doi.org/10.1117/12.2313126

KEYWORDS: Mirrors, Optics manufacturing, Single point diamond turning, Magnetorheological finishing, Manufacturing, Cryogenics, Polishing, Aluminum, Coating

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Proceedings Article | 5 June 2018 Paper

Si/SiO2-based filter coatings for astronomical applications in the IR spectral range

R. Schlegel, D. Gäbler, M. Schürmann, R. Follert, U. Seemann, E. Oliva, S. Schwinde

Proceedings Volume 10691, 106911E (2018) https://doi.org/10.1117/12.2311310

KEYWORDS: Refractive index, Optical coatings, Silicon, Germanium, Optical filters, Annealing, Sputter deposition

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Proceedings Article | 22 July 2016 Paper

Manufacturing and coating of optical components for the EnMAP hyperspectral imager

M. Schürmann, D. Gäbler, R. Schlegel, S. Schwinde, T. Peschel, C. Damm, R. Jende, J. Kinast, S. Müller, M. Beier, S. Risse, B. Sang, M. Glier, H. Bittner, M. Erhard

Proceedings Volume 9912, 991230 (2016) https://doi.org/10.1117/12.2232914

KEYWORDS: Mirrors, Coating, Prisms, Imaging systems, Antireflective coatings, Spectrometers, Surface finishing, Telescopes, Silver, Short wave infrared radiation

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Proceedings Article | 12 March 2015 Paper

Metal mirrors with metal-dielectric HR-coating for ultrashort laser pulses applied in scanner applications

M. Schürmann, S. Risse, H. Kämmer, C. Franke, R. Schlegel, S. Müller, C. Damm, R. Steinkopf, F. Dreisow, S. Nolte, R. Eberhardt, N. Kaiser

Proceedings Volume 9351, 93510S (2015) https://doi.org/10.1117/12.2079487

KEYWORDS: Mirrors, Coating, Metals, Reflectivity, Polishing, Dielectrics, Surface finishing, Laser damage threshold, Picosecond phenomena, Diamond turning

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Showing 5 of 7 publications

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