Suche nach „[Rascher] [Rolf]“ hat 205 Publikationen gefunden

DigitalNachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

M. Doetz, O. Dambon, Christian Vogt, Rolf Rascher, E. Langenbach, O. Fähnle

Enlarging process window of ductile mode machining of WC molds

Proceedings of EOSAM 2018 (European Optical Society Biennial Meeting; October 2018; Delft, The Netherlands): Optical System Design, Tolerancing, and Fabrication

2018

DigitalNachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

Christian J. Trum, Christian Vogt, O. Fähnle, Sebastian Sitzberger, Rolf Rascher

First experiences with Filled-Up-Microscopy (FUM) to evaluate the depth of sub-surface damages on ground surfaces

Proceedings of EOSAM 2018 (European Optical Society Biennial Meeting; October 2018; Delft, The Netherlands): Optical System Design, Tolerancing, and Fabrication

2018

DigitalNachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

Christian Vogt, M. Doetz, Rolf Rascher, O. Fähnle

Standardized evaluation of grinding tools for brittle and ductile mode grinding

Invited Paper

Proceedings of EOSAM 2018 (European Optical Society Biennial Meeting; October 2018; Delft, The Netherlands): Optical System Design, Tolerancing, and Fabrication

2018

DigitalNachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Vortrag

Rolf Rascher

Grinding and polishing of glass - Basis for a perfect coating

12th International Conference on Coatings on Glass and Plastics (Joint session of DGG-Glasforum and the ICCG): The Glass Surface - The Basis for Innovative Coatings, Würzburg

2018

DigitalNachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Vortrag

Rolf Rascher, Christian Vogt, O. Fähnle, E. Langenbach

Closed-loop laser polishing of glass

LaP 2018 - 3rd Conference on Laser Polishing, Aachen

2018

NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

Christian Vogt, O. Fähnle, E. Langenbach, Rolf Rascher

In situ monitoring of laser polishing

DGaO-Proceedings 2018

2018

DigitalNachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Vortrag

Alexander Haberl, H. Harsch, Gerald Fütterer, Johannes Liebl, C. Pruß, Rolf Rascher, W. Osten

Model based error separation of power spectral density artefacts in wavefront measurement

SPIE Optical Engineering + Applications Conference on Interferometry XIX, San Diego, CA, USA

2018

NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Vortrag

Christian J. Trum, Sebastian Sitzberger, Rolf Rascher

Improved performance of CMP processes through targeted adjustment of polishing slurry and polish pad

SPIE Optical Engineering + Applications 2018, San Diego, CA, USA

2018

NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Zeitschriftenartikel

Christian J. Trum, Rolf Rascher, M. Zäh

Effizientes chemisch-mechanisches Polieren (CMP)

Werkstattstechnik online-wt-online, no. 3, pp. 174-179

2018

NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

Christian J. Trum, Sebastian Sitzberger, Rolf Rascher

Improved performance of CMP processes through targeted adjustment of polishing slurry and polish pad

Proceedings of SPIE Optical Engineering + Applications (19-23 August, 2018; Optical Manufacturing and Testing XII; San Diego, CA, USA), San Diego, United States, vol. 10742

2018

ISBN: 978-1-5106-2055-1

DOI: 10.1117/12.2321031

Abstract anzeigen

Chemical-mechanical polishing (CMP) of optical glasses is widespread and forms the basis for many high-precision polishing processes. The pads, slurries and glass materials used in polishing have many different properties. The effects of these properties on the process results are often unknown. The right choice and combination is therefore often a challenge. By means of a plan processing of N-BK7 and SF56 samples by a plan-polishing process, the influence on the process results, material removal rate (MRR), micro roughness and cleanliness caused by slurry and polishing pad is shown. It turns out that the type of polish pad has the biggest impact on the results. The easy-to-process material N-BK7 shows only little influence by the type of slurry used. The more challenging SF56, however, shows significant effects, especially in the area of the resulting micro roughness and the appearance of surface damages like orange peel. Especially the use of Auerpol® PZ500 shows clear advantages here. For a selection of three out of nine polishing pads, the effect of density variation of the slurry was also investigated. Lower particle concentrations lead to lower material removal rates. This applies to both materials. The more sensitive SF56 shows a reduction in micro roughness by the use of a less dense slurry. The correct selection of the polishing pad has a positive effect on the material removal rate and/or the micro roughness in all tested materials. An adaptation of the type and concentration of the slurry is especially important for more sensitive materials and in combination with the right polishing pad. In view of the development towards special materials and small lot sizes, the targeted and correct selection of polishing slurries and pads becomes more and more important. The information required for this purpose on the behavior of the pads and slurries available on the market must therefore first be determined in a targeted manner and clearly presented.

NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

O. Fähnle, Christian Vogt, Rolf Rascher

Load controlled process window analysis of feed controlled CNC grinding

PROCEEDINGS VOLUME 10692 SPIE OPTICAL SYSTEMS DESIGN, 14-17 MAY 2018 Optical Fabrication, Testing, and Metrology VI, Frankfurt, Germany

2018

ISBN: 978-1-5106-1921-0

DOI: 10.1117/12.2315336

NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

O. Fähnle, O. Dambon, M. Doetz, F. Klocke, Christian Vogt, Rolf Rascher

Ductile grinding of tungsten carbide applying standard CNC machines: a process analysis

Proceedings of SPIE 10692: SPIE Optical Systems Design/Optical Fabrication, Testing, and Metrology VI (14.-17.05.2018; Frankfurt/Main)

2018

DOI: 10.1117/12.2315338

NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

Christian J. Trum, Christian Vogt, Sebastian Sitzberger, Rolf Rascher, O. Fähnle

Filled-Up-Microscopy (FUM): a non-destructive method for approximating the depth of sub-surface damage on ground surfaces

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

2018

ISBN: 978-1-5106-2270-8

DOI: 10.1117/12.2318576

NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

O. Fähnle, M. Doetz, O. Dambon, F. Klocke, Christian Vogt, Rolf Rascher

Ductile mode single point diamond turning (SPDT) of binderless tungsten carbide molds

Proceedings of SPIE Optical Engineering + Applications (19-23 August, 2018; Optical Manufacturing and Testing XII; San Diego, CA, USA), San Diego, United States, vol. 10742

2018

ISBN: 978-1-5106-2055-1

DOI: 10.1117/12.2323244

NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

O. Fähnle, Christian Vogt, Rolf Rascher, M. Doetz, O. Dambon, F. Klocke

From turning to grinding: ductile machining with gPVA

Proceedings of SPIE Optical Engineering + Applications (19-23 August, 2018; Optical Manufacturing and Testing XII; San Diego, CA, USA), San Diego, United States, vol. 10742

2018

ISBN: 978-1-5106-2055-1

DOI: 10.1117/12.2323246

NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

O. Fähnle, Christian Vogt, Rolf Rascher, M. Doetz, O. Dambon, F. Klocke

Ductile grinding of tungsten carbide molds applying standard CNC machines

Proceedings of SPIE Optical Engineering + Applications (19-23 August, 2018; Optical Manufacturing and Testing XII; San Diego, CA, USA), San Diego, United States, vol. 10742

2018

ISBN: 978-1-5106-2055-1

DOI: 10.1117/12.2323245

NachhaltigS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

Christian Vogt, Rolf Rascher, O. Fähnle, Dae Kim

Closed-loop next generation laser polishing

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

2018

ISBN: 978-1-5106-2270-8

DOI: 10.1117/12.2318749

NachhaltigS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

Christian Vogt, O. Fähnle, Rolf Rascher

gPVA: a system for the classification of grinding tools

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

2018

ISBN: 978-1-5106-2270-8

DOI: 10.1117/12.2318695

NachhaltigS: IPH Teisnach

Vortrag

Christian Vogt, O. Fähnle, E. Langenbach, Rolf Rascher

In situ laser monitoring of laser polishing

119. Jahrestagung der Deutschen Gesellschaft für angewandte Optik (DGaO), Technische Hochschule Aalen

2018

Abstract anzeigen

A novel fabrication parameter controlling method for laser polishing is presented, measuring within the footprint the smoothening process in real time. Recently, a new method for in situ measuring level of surface roughness has been developed [1] where a HeNe laser beam is being reflected from within the sample at the surface under test and the intensity of its reflected beam is being monitored.In this paper we report on an experimental study where this method has been applied to laser polishing. The internal local surface area under test is chosen to be located at the very spot where the laser polishing footprint is located from the outside of the sample melting its surface locally. Because fused silica is not transparent at the operating CO2 laser wavelength, the intensity of the reflected beam can be monitored enabling an in situ control of the laser polishing process. Consequently, the optimum dwell time can be determined, a footprint needs to stay at a certain point before moving further enabling a more stable and cost optimized polishing. [1] O.Fähnle,“In process monitoring of optics fabrication”, SPIEconference “PrecisionOptics Manufacturing”2017

NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenS: IPH Teisnach

Beitrag (Sammelband oder Tagungsband)

Alexander Haberl, H. Harsch, Gerald Fütterer, Johannes Liebl, C. Pruß, Rolf Rascher, W. Osten

Model based error separation of power spectral density artefacts in wavefront measurement

Proceedings of SPIE 10749 (SPIE Optical Engineering + Applications Conference on Interferometry XIX [August 19-23, 2018; San Diego, CA, USA])

2018

DOI: 10.1117/12.2321106