Mr. Sven R. Kiontke Profile

Sven R. Kiontke

CEO/Founder at asphericon GmbH

SPIE Involvement:

Conference Program Committee | Author

Publications (16)

Proceedings Article | 29 September 2016 Presentation + Paper

Discussing design for manufacturability for two freeform imaging systems

Ulrike Fuchs, Sven Kiontke

Proceedings Volume 9948, 99480L (2016) https://doi.org/10.1117/12.2237187

KEYWORDS: Optics manufacturing, Freeform optics, Design for manufacturability, Optical design, Imaging systems, Aspheric lenses, Tolerancing, Manufacturing, Silver, Germanium

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Proceedings Article | 27 September 2016 Presentation + Paper

Asphere wedge and decenter: What you see is not always what you get

M. Trabert, U. Fuchs, S. Kiontke

Proceedings Volume 9951, 99510I (2016) https://doi.org/10.1117/12.2237051

KEYWORDS: Aspheric lenses, Tolerancing, Optical spheres, Manufacturing, Telescopes, Spherical lenses, Sensors, Distance measurement, Optics manufacturing, Optical design

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SPIE Journal Paper | 7 April 2016

Implementing ISO standard-compliant freeform component drawings

Richard Youngworth, Sven Kiontke, David Aikens

OE, Vol. 55, Issue 07, 071205, (April 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.7.071205

KEYWORDS: Standards development, Tolerancing, Aspheric lenses, Optical components, Manufacturing, Optical engineering, Freeform optics, Metrology, Photovoltaics, Photonics

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Proceedings Article | 5 October 2015 Paper

Conversion of radius of curvature to power (and vice versa)

Sven Wickenhagen, Kazumasa Endo, Ulrike Fuchs, Richard Youngworth, Sven Kiontke

Proceedings Volume 9628, 962813 (2015) https://doi.org/10.1117/12.2191400

KEYWORDS: Tolerancing, Standards development, Aspheric lenses, Glasses, Optics manufacturing, Interferometers, Interferometry, Optical spheres, Optical design, Metrology

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Proceedings Article | 25 September 2015 Paper

Monolithic freeform element

Sven Kiontke

Proceedings Volume 9575, 95750G (2015) https://doi.org/10.1117/12.2188138

KEYWORDS: Optics manufacturing, Optical components, Aspheric lenses, Tolerancing, Manufacturing, Optical design, Photovoltaics, Sensors, Freeform optics, Optical testing

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Proceedings Article | 3 September 2015 Paper

Freeform capability enabled by ISO 10110

Sven Kiontke, David Aikens, Richard Youngworth

Proceedings Volume 9582, 958202 (2015) https://doi.org/10.1117/12.2188160

KEYWORDS: Standards development, Aspheric lenses, Optical components, Tolerancing, Freeform optics, Geometrical optics, Optics manufacturing, Manufacturing, Metrology, Photonics

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Proceedings Article | 26 February 2015 Paper

Roughness reduction on aspheric surfaces

S. Kiontke, Sebastian Kokot

Proceedings Volume 9345, 93450B (2015) https://doi.org/10.1117/12.2079251

KEYWORDS: Aspheric lenses, Surface finishing, Polishing, High power lasers, Spectroscopy, Manufacturing, Spherical lenses, Optical spheres, Radium, Surface roughness

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Proceedings Article | 17 December 2014 Paper

Description and tolerancing of freeform surfaces in standards

Sven Kiontke, David Aikens, Richard Youngworth

Proceedings Volume 9293, 92930T (2014) https://doi.org/10.1117/12.2075925

KEYWORDS: Standards development, Tolerancing, Aspheric lenses, Freeform optics, Optical spheres, Optical design, Photovoltaics, Lens design, Aspheric optics, Metrology

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Proceedings Article | 17 December 2014 Paper

Standards: a key element of optical design, engineering productivity, and time to market

Richard Youngworth, Sven Kiontke, David Aikens

Proceedings Volume 9293, 929317 (2014) https://doi.org/10.1117/12.2075347

KEYWORDS: Standards development, Glasses, Optical design, Optical engineering, Aspheric lenses, Optical components, Product engineering, Tolerancing, Optical communications, Coating

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Proceedings Article | 15 October 2012 Paper

Monolithic optical components for splitting of high-power beams

M. Jarczynski, T. Mitra, M. Ivaneko, L. Aschke, C. Wächter, U. Fuchs, T. Linke, S. Kiontke

Proceedings Volume 8490, 84900Q (2012) https://doi.org/10.1117/12.932256

KEYWORDS: Beam splitters, High power lasers, Aspheric lenses, Optics manufacturing, Silica, Diffraction, Optical components, Optical design, Glasses, Diffractive optical elements

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Proceedings Article | 15 September 2011 Paper

Measured aspheric surface irregularities as input to the Euclid-NISP tolerancing

Ulrike Fuchs, Frank Grupp, Sven Kiontke, Ralf Bender

Proceedings Volume 8146, 814610 (2011) https://doi.org/10.1117/12.893653

KEYWORDS: Tolerancing, Aspheric lenses, Surface finishing, Data modeling, Zernike polynomials, Space telescopes, Zemax, Monte Carlo methods, Image processing, Diffraction

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Proceedings Article | 23 February 2011 Paper

Ion beam figuring of silicon aspheres

Marcel Demmler, Michael Zeuner, Alfonz Luca, Thoralf Dunger, Dirk Rost, Sven Kiontke, Marcus Krüger

Proceedings Volume 7934, 793416 (2011) https://doi.org/10.1117/12.873787

KEYWORDS: Ion beams, Silicon, Lenses, Polishing, Surface finishing, Aspheric lenses, Manufacturing, Calibration, Silicon carbide, Etching

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Silicon lenses are widely used for infrared applications. Especially for portable devices the size and weight of the optical system are very important factors. The use of aspherical silicon lenses instead of spherical silicon lenses results in a significant reduction of weight and size. The manufacture of silicon lenses is more challenging than the manufacture of standard glass lenses. Typically conventional methods like diamond turning, grinding and polishing are used. However, due to the high hardness of silicon, diamond turning is very difficult and requires a lot of experience. To achieve surfaces of a high quality a polishing step is mandatory within the manufacturing process. Nevertheless, the required surface form accuracy cannot be achieved through the use of conventional polishing methods because of the unpredictable behavior of the polishing tools, which leads to an unstable removal rate. To overcome these disadvantages a method called Ion Beam Figuring can be used to manufacture silicon lenses with high surface form accuracies. The general advantage of the Ion Beam Figuring technology is a contactless polishing process without any aging effects of the tool. Due to this an excellent stability of the removal rate without any mechanical surface damage is achieved. The related physical process - called sputtering - can be applied to any material and is therefore also applicable to materials of high hardness like Silicon (SiC, WC). The process is realized through the commercially available ion beam figuring system IonScan 3D. During the process, the substrate is moved in front of a focused broad ion beam. The local milling rate is controlled via a modulated velocity profile, which is calculated specifically for each surface topology in order to mill the material at the associated positions to the target geometry. The authors will present aspherical silicon lenses with very high surface form accuracies compared to conventionally manufactured lenses.

Proceedings Article | 25 August 2010 Paper

Ion-beam figuring (IBF) for high-precision optics becomes affordable

Sven Kiontke, Marcel Demmler, Michael Zeuner, Frank Allenstein, Thoralf Dunger, Matthias Nestler

Proceedings Volume 7786, 77860F (2010) https://doi.org/10.1117/12.859127

KEYWORDS: Ion beams, Ion beam finishing, Aspheric lenses, Surface finishing, Manufacturing, Polishing, Precision optics, Optical components, Ions, Lenses

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Proceedings Article | 16 February 2010 Paper

Ion beam figuring (IBF) for high precision optics

Marcel Demmler, Michael Zeuner, Frank Allenstein, Thoralf Dunger, Matthias Nestler, Sven Kiontke

Proceedings Volume 7591, 75910Y (2010) https://doi.org/10.1117/12.840908

KEYWORDS: Ion beams, Ion beam finishing, Etching, Polishing, Spatial frequencies, Ions, Optical components, Optics manufacturing, Precision optics, Surface finishing

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Recently and upcoming optical applications depend more and more on the precision of the optical elements used. The last is especially driven by shorter wavelength, higher flux densities and imaging close to the diffraction limit. Therefore a dramatically increasing demand on high precision and high quality optical components in leading edge equipment as well as common devices and instruments is observed. So far a few methods have been introduced to provide an adequate manufacturing performance using mechanical grinding and polishing techniques. Up to now the very sophisticated ion beam figuring (IBF) has not been used for common optics. The reasons for this might be the perception of higher costs and less knowledge about the technique in the industry. Now an affordable ion beam figuring technique has been developed to address precision aspherical optics applications. This paper introduces ion beam figuring technology based on equipment which is widely used in semiconductor mass production for ultra precise film thickness trimming. Ion beam figuring works by raster-scanning a focused broad ion beam across an optical surface with variable velocity and dwell time in order to precisely and locally trim away surface contour errors. As a new and cost effective approach the ion beam figuring system used in this presentation applies a 3 axis movement system only (compared to expensive 5-axis movements in other applications). X-and y-axes are used for the areal scan, and the z-axis is used for focus adjustment due to the surface contour of the optical element. The system was intentionally designed without the 2 additional tilt axes for incident angle adjustment and cleverly reduces the complexity and size of the system. It is shown that curved spherical or aspherical surfaces can be corrected down to λ/50 or better by using the state of the art 3-axes trimming system. Even with high spatial frequency parts final processing qualities better than λ/10 are achieved.

Proceedings Article | 25 September 2008 Paper

Aspherical manufacturing in terms of accuracy, efficiency, and surface forms based on practical experiences

Sven Kiontke, Ralf Steinkopf

Proceedings Volume 7102, 71020D (2008) https://doi.org/10.1117/12.799487

KEYWORDS: Polishing, Aspheric lenses, Surface finishing, Manufacturing, Lenses, Lens grinding, Spherical lenses, Optical spheres, Process control, Measurement devices

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Proceedings Article | 12 September 2007 Paper

New approaches for manufacturing refractive beam shapers

Sven Kiontke

Proceedings Volume 6663, 66630I (2007) https://doi.org/10.1117/12.741027

KEYWORDS: Beam shaping, Manufacturing, Zoom lenses, Lithium, Optical spheres, Aspheric lenses, Optics manufacturing, Cobalt, Optical design, Optical components

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Showing 5 of 16 publications

Conference Committee Involvement (5)

Optical Fabrication and Testing VIII

8 April 2024 | Strasbourg, France

Optical Fabrication, Testing, and Metrology VII

13 September 2021 | Online Only, Spain

Optical Manufacturing and Testing XII

20 August 2018 | San Diego, California, United States

Optical Fabrication, Testing, and Metrology VI

15 May 2018 | Frankfurt, Germany

Optical Manufacturing and Testing XI

9 August 2015 | San Diego, California, United States

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