Suche nach „[Rascher] [Rolf]“ hat 185 Publikationen gefunden

NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

Vortrag

Simon Killinger, Alexander Haberl, Rolf Rascher

Analysis of residual errors during computer controlled polishing

EOS Optical Technologies: Conference on Manufacturing, Tolerancing and Testing of Optical Systems (MOS) – Session 7: Plenary Session, München

2019

Abstract anzeigen

In computer controlled subapertur polishing the formation of mid spatial frequency errors (MSFE) needs special attention. In this work the formation of MSFE in feed direction is investigated using the ADAPT tool from Satisloh.

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Vortrag

Sebastian Sitzberger, P. Rinck, A. Gueray, Rolf Rascher

Ultraschallunterstützte Zerspanung von Advanced Materials

3. Wissenschaftliches Forum zur ULTRASONIC-Bearbeitung, Jena

2019

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Vortrag

Sebastian Sitzberger, Jakob Reitberger, Rolf Rascher

Clamping system for optical components for adaptation in optical production

10th HLEM 2019 - High Level Expert Meeting Asphere Metrology on Joint Investigations, Braunschweig

2019

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Beitrag (Sammelband oder Tagungsband)

Michael Benisch, Werner Bogner, Rolf Rascher

Using A Digital Temperature Sensor To Measure The Temperature Development During A Polishing Process

Proceedings of the 2019 EOS Optical Technologies Conference

2019

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Beitrag (Sammelband oder Tagungsband)

M. Pohl, U. Bielke, R. Boerret, Rolf Rascher, Olga Kukso

MSF-error prevention strategies for the grinding process

Proceedings of SPIE 11171 (Sixth European Seminar on Precision Optics Manufacturing, 1117101 [April 9th-10th 2019, Teisnach]), Bellingham, WA, USA

2019

DOI: 10.1117/12.2526581

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 third publication focuses on strategies of avoidance and generation mechanisms of the mid-spatial frequency errors from the grinding process. The Goal is to understand the generation mechanisms of the mid-spatial frequency errors and avoid their appearance in the manufacturing process.

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Beitrag (Sammelband oder Tagungsband)

Sebastian Sitzberger, Johannes Liebl, Jakob Reitberger, Rolf Rascher

Zero-point clamping systems in optical production

Proceedings of SPIE 11171 (Sixth European Seminar on Precision Optics Manufacturing, 1117101 [April 9th-10th 2019, Teisnach]), Bellingham, WA, USA

2019

DOI: 10.1117/12.2528774

Abstract anzeigen

Zero point clamping systems are an integral part of the manufacturing industry. They have only yet to find their way into the optical industry. This article compares the hydraulic expansion holder, a clamping system currently used in the optical industry with a zero-point clamping system. The achievable accuracies of both systems are compared over several measurement series. In addition, the process capability evaluation is used for the comparison. Finally, the results are summarized to provide every researcher and practitioner with a foundation for assessing whether zero point clamping systems meet the requirements for the use in optical manufacturing.

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Beitrag (Sammelband oder Tagungsband)

Simon Killinger, Johannes Liebl, Rolf Rascher

Mid-spatial frequency errors in feed direction occurring in ADAPT polishing

Proceedings of SPIE 11171 (Sixth European Seminar on Precision Optics Manufacturing, 1117101 [April 9th-10th 2019, Teisnach]), Bellingham, WA, USA

2019

DOI: 10.1117/12.2528114

Abstract anzeigen

Previous work shows the effectiveness of computer controlled polishing (CCP) with the ADAPT tool by Satisloh for correcting form errors in optics manufacturing. This method however has a risk of producing residual errors in the range of mid spatial frequency errors (MSFE). In order to prevent these errors the residual in feed direction is investigated as well as the behavior at different parameters.

DigitalNachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH 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

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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

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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

DigitalNachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH 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

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Vortrag

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

Closed-loop laser polishing of glass

LaP 2018 - 3rd Conference on Laser Polishing, Aachen

2018

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Beitrag (Sammelband oder Tagungsband)

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

In situ monitoring of laser polishing

DGaO-Proceedings 2018

2018

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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

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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

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Zeitschriftenartikel

Christian J. Trum, Rolf Rascher, M. Zäh

Effizientes chemisch-mechanisches Polieren (CMP)

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

2018

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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.

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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

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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

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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