Dr. William I. Kordonski Profile

Dr. William I. Kordonski

at QED Optics

SPIE Involvement:

Author

Publications (16)

Proceedings Article | 14 May 2007 Paper

Advances in finishing using magnetorheological (MR) jet technology

Justin Tracy, William Kordonski, Aric Shorey, Marc Tricard

Proceedings Volume 10316, 103160F (2007) https://doi.org/10.1117/12.718079

KEYWORDS: Polishing, Surface finishing, Magnetism, Collimation, Optical design, Abrasives, Principal component analysis, Spindles, Spherical lenses, Plano

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Proceedings Article | 2 May 2007 Paper

Developments in the finishing of domes and conformal optics

Aric Shorey, William Kordonski, Justin Tracy, Marc Tricard

Proceedings Volume 6545, 65450Q (2007) https://doi.org/10.1117/12.717584

KEYWORDS: Polishing, Magnetorheological finishing, Aspheric lenses, Surface finishing, Interferometers, Domes, Metrology, Optical spheres, Freeform optics, Fringe analysis

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Proceedings Article | 18 August 2005 Paper

Jet-induced high-precision finishing of challenging optics

William Kordonski, Aric Shorey, Marc Tricard

Proceedings Volume 5869, 586909 (2005) https://doi.org/10.1117/12.617306

KEYWORDS: Polishing, Surface finishing, Glasses, Photovoltaics, Magnetism, Spherical lenses, Sapphire, Aluminum, Abrasives, Collimation

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Proceedings Article | 18 May 2005 Paper

Deterministic precision finishing of domes and conformal optics

Aric Shorey, William Kordonski, Marc Tricard

Proceedings Volume 5786, (2005) https://doi.org/10.1117/12.607456

KEYWORDS: Polishing, Magnetorheological finishing, Surface finishing, Metrology, Interferometers, Optics manufacturing, Aspheric lenses, Domes, Optical spheres, Magnetism

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Proceedings Article | 2 May 2005 Paper

Precision finishing with magnetorheological (MR) jet technology

William Kordonski, Aric Shorey, Marc Tricard

Proceedings Volume 10315, 1031502 (2005) https://doi.org/10.1117/12.605912

KEYWORDS: Polishing, Optical components, Magnetism

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Proceedings Article | 18 October 2004 Paper

Magnetorheological finishing of large and lightweight optics

Aric Shorey, William Kordonski, Marc Tricard

Proceedings Volume 5533, (2004) https://doi.org/10.1117/12.559814

KEYWORDS: Magnetorheological finishing, Polishing, Surface finishing, Mirrors, Lightweight mirrors, Optics manufacturing, Abrasives, Particles, Silicon carbide, Crystals

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Proceedings Article | 24 September 2004 Paper

Magnetorheological finishing and subaperture stitching interferometry of large and lightweight optics

Aric Shorey, William Kordonski, Marc Tricard

Proceedings Volume 5494, (2004) https://doi.org/10.1117/12.550997

KEYWORDS: Magnetorheological finishing, Polishing, Mirrors, Surface finishing, Optics manufacturing, Aspheric lenses, Lightweight mirrors, Interferometers, Stitching interferometry, Calibration

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Significant challenges are faced in the manufacturing of the complex optics for the next generation of astronomical telescopes. Process improvements are required to establish cost effective techniques to finish the optics to the tight specification required in a timely manner. An added complication is realized when the optics are lightweight. The non-uniform support of the face-sheet in this case requires special efforts to avoid a print-through of the cell structure due to fabrication processes, gravity and/or cryogenic effects. Magnetorheological finishing (MRF) is a deterministic, sub-aperture polishing process that has been a revolutionary success in the fabrication of optics in the size range of 10-1000 mm. This production proven process is capable of polishing flats, spheres, aspheres and cylinders to a surface figure accuracy of better than 30 nm peak-to-valley (better than 5 nm rms), and microroughness better than 1 nm rms on a variety of glasses, glass ceramics and single crystal materials. Unique characteristics of MRF such as a high, stable removal rate, conformal nature of the sub-aperture tool and shear mode of material removal give it advantages in the finishing of large and lightweight optics. These qualities provide for a cost-effective process with a high rate of convergence that requires few iterations. Such a technology is ideally complemented by a system for the stitching of interferometric sub-aperture data. Stitching inherently enables the testing of larger apertures with higher resolution and, thanks to the built-in calibration, even to higher accuracy in many situations. While this approach enables the non-null testing of parts with greater aspheric departure and can lead to a significantly reduced non-common air path in the testing of long-radius concave parts, it is especially effective for convex optics. That is, stitching is particularly well suited to the testing of secondary mirrors and, alongside the testing of the off-axis primary segments.

Proceedings Article | 22 December 2003 Paper

New magnetically assisted finishing method: material removal with magnetorheological fluid jet

William Kordonski, Aric Shorey, Arpad Sekeres

Proceedings Volume 5180, (2003) https://doi.org/10.1117/12.506280

KEYWORDS: Polishing, Surface finishing, Abrasives, Particles, Glasses, Silica, Liquids, Collimation, Magnetism, Magnetorheological finishing

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Proceedings Article | 27 December 2001 Paper

Use of magnetorheological finishing (MRF) to relieve residual stress and subsurface damage on lapped semiconductor silicon wafers

Steven Arrasmith, Stephen Jacobs, John Lambropoulos, Alexander Maltsev, Donald Golini, William Kordonski

Proceedings Volume 4451, (2001) https://doi.org/10.1117/12.453627

KEYWORDS: Semiconducting wafers, Magnetorheological finishing, Polishing, Surface finishing, Abrasives, Silicon, Crystals, Semiconductors, Photovoltaics, Particles

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Proceedings Article | 11 November 1999 Paper

Details of the polishing spot in magnetorheological finishing (MRF)

Steven Arrasmith, Irina Kozhinova, Leslie Gregg, Aril Shorey, Henry Romanofsky, Stephen Jacobs, Donald Golini, William Kordonski, Stephen Hogan, Paul Dumas

Proceedings Volume 3782, (1999) https://doi.org/10.1117/12.369175

KEYWORDS: Magnetorheological finishing, Polishing, Magnetism, Microfluidics, Surface finishing, Abrasives, Optics manufacturing, Scanning tunneling microscopy, Single point diamond turning, Crystals

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Proceedings Article | 11 November 1999 Paper

Magnetorheological finishing (MRF) in commercial precision optics manufacturing

Donald Golini, William Kordonski, Paul Dumas, Stephen Hogan

Proceedings Volume 3782, (1999) https://doi.org/10.1117/12.369174

KEYWORDS: Magnetorheological finishing, Polishing, Surface finishing, Aspheric lenses, Glasses, Optics manufacturing, Magnetism, Abrasives, Microfluidics, Particles

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Proceedings Article | 16 June 1998 Paper

Magnetorheological-suspension-based finishing technology

William Kordonski, Donald Golini, Paul Dumas, Stephen Hogan, Stephen Jacobs

Proceedings Volume 3326, (1998) https://doi.org/10.1117/12.310670

KEYWORDS: Polishing, Surface finishing, Magnetorheological finishing, Magnetism, Particles, Abrasives, Glasses, Aspheric lenses, Chemical mechanical planarization, Solids

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Proceedings Article | 1 November 1997 Paper

Magnetorheological finishing of IR materials

Stephen Jacobs, Fuqian Yang, Edward Fess, J. Feingold, Birgit Gillman, William Kordonski, Harold Edwards, Donald Golini

Proceedings Volume 3134, (1997) https://doi.org/10.1117/12.295132

KEYWORDS: Magnetorheological finishing, Polishing, Glasses, Surface finishing, Infrared materials, Particles, Diamond, Zinc, Abrasives, Magnesium fluoride

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Proceedings Article | 28 July 1997 Paper

Precision optics fabrication using magnetorheological finishing

Donald Golini, Stephen Jacobs, William Kordonski, Paul Dumas

Proceedings Volume 10289, 102890H (1997) https://doi.org/10.1117/12.279809

KEYWORDS: Precision optics, Magnetorheological finishing, Surface finishing, Polishing, Magnetism, Process control, Abrasives, Interfaces, Spindles, Software

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Proceedings Article | 8 September 1995 Paper

Fabrication of glass aspheres using deterministic microgrinding and magnetorheological finishing

Donald Golini, Stephen Jacobs, William Kordonsky

Proceedings Volume 2536, (1995) https://doi.org/10.1117/12.218425

KEYWORDS: Aspheric lenses, Magnetorheological finishing, Polishing, Glasses, Surface finishing, Aspheric optics, Microfluidics, Optics manufacturing, Plano, Magnetism

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Proceedings Article | 2 August 1995 Paper

Magnetorheological finishing: a deterministic process for optics manufacturing

Stephen Jacobs, Donald Golini, Yuling Hsu, Birgit Puchebner, D. Strafford, William Kordonski, Igor Prokhorov, Edward Fess, D. Pietrowski, V. Kordonski

Proceedings Volume 2576, (1995) https://doi.org/10.1117/12.215617

KEYWORDS: Magnetorheological finishing, Polishing, Magnetism, Surface finishing, Glasses, Aspheric lenses, Optics manufacturing, Abrasives, Spindles, Optical spheres

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Showing 5 of 16 publications

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