Suche nach „[Vogt] [Christian]“ hat 50 Publikationen gefunden

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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

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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

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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

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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

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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

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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

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)

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])

ISBN: 978-1-5106-2270-8

DOI: 10.1117/12.2318576

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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

ISBN: 978-1-5106-2055-1

DOI: 10.1117/12.2323244

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Beitrag (Sammelband oder Tagungsband)

O. Fähnle, Christian Vogt, Rolf Rascher, Marius Doetz, Olaf Dambon, Fritz 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

ISBN: 978-1-5106-2055-1

DOI: 10.1117/12.2323246

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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

ISBN: 978-1-5106-2055-1

DOI: 10.1117/12.2323245

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Beitrag (Sammelband oder Tagungsband)

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

Closed-loop next generation laser polishing

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

ISBN: 978-1-5106-2270-8

DOI: 10.1117/12.2318749

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Beitrag (Sammelband oder Tagungsband)

M. Doetz, O. Fähnle, Christian Vogt

SPDT and standard CNC-grinding of tungsten carbide molds for precision glass molding: an experimental process analysis

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

ISBN: 978-1-5106-2270-8

DOI: 10.1117/12.2318710

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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])

ISBN: 978-1-5106-2270-8

DOI: 10.1117/12.2318695

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Vortrag

Christian Vogt

Standardized evaluation of grinding tools for brittle and ductile mode grinding

European Optical Society Biennial Meeting (EOSAM) 2018, Delft, Niederlande

Abstract anzeigen

Grinding processes offer a variety of parameters that influence the quality and quantity of the optical elements to be produced. Systematic optimization can also uncover unused potential in "stable and efficient" processes. gPVA (grinding Process Validation Approach) is a system for describing grinding processes. It was first presented in 2017 as a tool for process optimization. gPVA is a method to evaluate different grinding tools in terms of maximum material removal. Therefore, a standardized testing procedure was developed, that can be carried out on standard CNC grinding machines (Fig 1). The data is used to identify parameter sets with valid points of operation with a linear proportion of feed speed and force. In order to evaluate the data independently of cutting speed and tool geometry, a so-called removal rate is calculated. This can essentially be understood as material removal rate.

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Vortrag

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

In situ laser monitoring of laser polishing

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

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

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Vortrag

Christian Vogt, Rolf Rascher

grinding Process Validation Approach (gPVA)

Posterpräsentation

5. Tag der Forschung, Deggendorf

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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)

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Zeitschriftenartikel

Christian Vogt, C. Faehnle, Rolf Rascher

Grinding Process Validation Approach (gPVA)

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

DOI: 10.17265/2159-5348/2017.05.004

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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

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.