Suche nach „[Rascher] [Rolf]“ hat 201 Publikationen gefunden

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

Beitrag (Sammelband oder Tagungsband)

M. Pohl, R. Börret, Rolf Rascher, Olga Kukso

Simulation of MSF errors using Fourier transform

Proceedings of SPIE 10829 (Fifth European Seminar on Precision Optics Manufacturing [April 10-11, 2018; Teisnach])

2018

ISBN: 978-1-5106-2270-8

DOI: 10.1117/12.2317484

Abstract anzeigen

This research is focused on the link between manufacturing parameters and the resulting mid spatial frequency error in the manufacturing process of precision optics. This first publication focuses on the parameters of the grinding step. The Goal is to understand and avoid the appearance of the mid spatial frequency error and develop a simulation which is able to predict the resulting mid spatial frequency error for/of a manufacturing process.

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

Vortrag

Christian Vogt, Rolf Rascher

grinding Process Validation Approach (gPVA)

Posterpräsentation

5. Tag der Forschung, Deggendorf

2018

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

Vortrag

Sebastian Sitzberger, Christian J. Trum, Rolf Rascher, M. Zaeh

Workpiece self-weight induced deformation in precision optics manufacturing

Posterpräsentation

5. Tag der Forschung, Deggendorf

2018

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

Vortrag

Christian Schopf, Florian Schneider, Rolf Rascher

ArenA – Foi: Erprobung des ADAPT-Polierwerkzeugs

Posterpräsentation

5. Tag der Forschung, Deggendorf

2018

Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Vortrag

Olga Kukso, Rolf Rascher, M. Pohl, R. Börret

EmmaV - Entstehungsmechanismen mittelfrequenter Fehler und deren aktive Vermeidung

Posterpräsentation

5. Tag der Forschung, Deggendorf

2018

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Zeitschriftenartikel

O. Fähnle, Rolf Rascher, Christian Vogt, D.W. Kim

Closed-loop laser polishing using in-process surface finish metrology

Applied Optics, vol. 57, no. 4, pp. 834-838

2018

DOI: 10.1364/AO.57.000834

Abstract anzeigen

This paper lays out the trail onto a closed-loop polishing process of optical elements enabling the application of the optimum polishing time needed. To that aim, an in-process testing method for monitoring an inclusive micro surface quality (e.g., comprising surface roughness and scratch-and-dig) within the polishing spot is analyzed and its applicability to closed-loop polishing for classical loose-abrasive full-aperture polishing as well as for computer controlled laser polishing is experimentally tested and verified. This enables the determination of the optimum local dwell time resulting in a stable and cost optimized polishing.

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Beitrag (Sammelband oder Tagungsband)

Bin Dong, Christian Vogt, Rolf Rascher

Wear detection of brass bond diamond grinding wheel by spectral coherence of grinding forces

Proceedings of the 17th International Conference of the European Society for Precision Engineering and Nanotechnology [euspen] (May 29 - June 2, 2017; Hanover, Germany)

2017

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Zeitschriftenartikel

Christian Vogt, C. Faehnle, Rolf Rascher

Grinding Process Validation Approach (gPVA)

Journal of Physical Science and Application, vol. 7, no. 5

2017

DOI: 10.17265/2159-5348/2017.05.004

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Beitrag (Sammelband oder Tagungsband)

Christian Schopf, Rolf Rascher, Johannes Liebl

Cheap and fast measuring roughness on big surfaces with an imprint method

Proceedings of SPIE 10448 (SPIE Optifab [October 16-19, 2017; Rochester, NY, USA])

2017

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Beitrag (Sammelband oder Tagungsband)

Christian Vogt, O. Fähnle, Rolf Rascher

Setting-up high-end cnc grinding processes: a Preston-based approach

Proceedings of EOS Optical Technologies Conferences at the World of Photonics Congress (WPC 2017) [Munich, Germany; June 26-29, 2017]

2017

Abstract anzeigen

The design of grinding processes is commonly based on the principle of trial and error. In most cases this will end up with a usable setup that delivers acceptable results. On the other hand this method is unlikely to reveal the process’s total potential. Allthough the principles of grinding and polishing are entirly different, the preston approach can be used to design grinding processes more intelligent and highly efficient. Carrying out a testing procedure for grinding tools reveals the tool’s removal properties on different materials. This allows to choose ideal sequences of pre and fine-grinding. Furthermore it is possible to choose the optimum machining parameters to optain a maximum output.

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Beitrag (Sammelband oder Tagungsband)

Christian Vogt, O. Fähnle, Rolf Rascher

Three wagons Approach Applied to Optimization of Industrial Grinding Processes

Optical Fabrication and Testing part of Optical Design and Fabrication: 9-13 July 2017, Denver, Colorado, United States, Washington, D.C., USA

2017

ISBN: 978-1-943580-31-6

DOI: 10.1364/OFT.2017.OTu2B.2

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Beitrag (Sammelband oder Tagungsband)

Rolf Rascher, Christian Vogt, C. Faehnle

In situ laser polishing optimization method: Control of LASer Surface Optimisation (C-Lasso)

Proceedings of EOS Optical Technologies Conferences at the World of Photonics Congress (WPC 2017) [Munich, Germany; June 26-29, 2017]

2017

Abstract anzeigen

Laser polishing is achieved by local absorption of laser power within the polishing spot causing the surface and its sub-surface region to melt and flow reducing surface roughness and removing sub-surface damage. In this paper we present a novel fabrication controlling method for laser polishing processes called C-Lasso (Control of LASer Surface Optimization, Patent Pending), monitoring in situ the surface smoothening process. It is possible to determine and control the minimum dwell time a footprint needs to stay at a certain point before moving further. C-Lasso enables to avoid unnecessarily long local dwell times. Besides the functioning principle, a proof of concept will be presented as well as experimental data demonstrating the in situ monitoring.

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Beitrag (Sammelband oder Tagungsband)

Robert Schneider, Alexander Haberl, Rolf Rascher

Parametrization of a Subaperture Polishing Tool - Analysis of the Path Tests

Optical Fabrication and Testing part of Optical Design and Fabrication: 9-13 July 2017, Denver, Colorado, United States, Washington, D.C., USA

2017

ISBN: 978-1-943580-31-6

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Beitrag (Sammelband oder Tagungsband)

Sebastian Sitzberger, Christian J. Trum, Rolf Rascher

Analysis of the influence of the workpiece self-weight in precision optics manufacturing using FEM simulation

Proceedings of SPIE 10326 (Fourth European Seminar on Precision Optics Manufacturing, 1032601 [April 4th-5th 2017, Teisnach])

2017

DOI: 10.1117/12.2273023

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Beitrag (Sammelband oder Tagungsband)

Christian Vogt, O. Fähnle, Rolf Rascher

Force-controlled analysis tool for optimization of precision CNC grinding processes

Proceedings of SPIE 10326 (Fourth European Seminar on Precision Optics Manufacturing, 1032601 [April 4th-5th 2017, Teisnach])

2017

DOI: 10.1117/12.2272713

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Beitrag (Sammelband oder Tagungsband)

Christian J. Trum, Sebastian Sitzberger, Rolf Rascher

Advanced method for the characterization of polishing suspensions

Proceedings of SPIE 10326 (Fourth European Seminar on Precision Optics Manufacturing, 1032601 [April 4th-5th 2017, Teisnach])

2017

DOI: 10.1117/12.2272431

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Beitrag (Sammelband oder Tagungsband)

Alexander Haberl, Rolf Rascher

Yet one more dwell time algorithm

Proceedings of SPIE 10326 (Fourth European Seminar on Precision Optics Manufacturing, 1032601 [April 4th-5th 2017, Teisnach])

2017

DOI: 10.1117/12.2270540

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Beitrag (Sammelband oder Tagungsband)

Engelbert Hofbauer, Rolf Rascher, Felix Friedke, R. Kometer

Resolution, measurement errors and uncertainties on deflectometric acquisition of large optical surfaces "DaOS"

Proceedings of SPIE 10326 (Fourth European Seminar on Precision Optics Manufacturing, 1032601 [April 4th-5th 2017, Teisnach])

2017

DOI: 10.1117/12.2267513

NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Beitrag (Sammelband oder Tagungsband)

Robert Schneider, Alexander Haberl, Rolf Rascher

Polishing tool and the resulting TIF for three variable machine parameters as input for the removal simulation

Proceedings of SPIE 10326 (Fourth European Seminar on Precision Optics Manufacturing, 1032601 [April 4th-5th 2017, Teisnach])

2017

DOI: 10.1117/12.2267415

Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Vortrag

Rolf Rascher, C. Weingarten

Hybridfertigung optischer Oberflächen

F.O.M.-Konferenz 2016 - Innovative Industrien unterstützen, Berlin

2016