Mr. Oliver Wiecha Profile

Oliver Wiecha

Lead Electrical Engineer

SPIE Involvement:

Author

Publications (28)

Proceedings Article | 29 August 2022 Presentation + Paper

Rubin Observatory hexapods: issues and upgrades

Douglas R. Neill, Brian Johnson, Myung Cho, Felipe Daruich, Holger Drass, Mostafa Lutfi, Kevin Sirano, Roberto Tighe, Te-Wei Tsai, Oliver Wiecha

Proceedings Volume 12188, 1218817 (2022) https://doi.org/10.1117/12.2628999

KEYWORDS: Actuators, Telescopes

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Proceedings Article | 29 August 2022 Presentation + Paper

Simonyi Survey Telescope M1M3 control system

Petr Kubánek, Doug Neill, Te-Wei Tsai, Dave Mills, Tiago Ribeiro, Felipe Daruich, Oliver Wiecha

Proceedings Volume 12189, 121890H (2022) https://doi.org/10.1117/12.2629784

KEYWORDS: Mirrors, Field programmable gate arrays, LabVIEW, Telescopes, Control systems, Observatories, Human-machine interfaces, Control systems design, Telecommunications, Actuators, Borosilicate glass

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Proceedings Article | 29 August 2022 Presentation + Paper

Rubin Observatory Commissioning Camera: summit integration

Brian Stalder, Kevin Reil, Christian Aguilar, Claudio Araya, Anthony Borstad, Boyd Bowdish, Myung Cho, Stephen Cisneros, Chuck Claver, Julio Constanzo, Giovanni Corvetto, Holger Drass, Frossie Economou, Erik Dennihy, Alan Eisner, Juan Fabrega, Angelo Fausti Neto, Merlin Fisher-Levine, Ivan Gonzalez, Ronald Harris, Diane Hascall, Justine Haupt, Josh Hoblitt, James Howard, Mike Huffer, Tim Jenness, David Jiménez Mejías, Brian Johnson, Tony Johnson, K. Simon Krughoff, Craig Lage, Travis Lange, Ming Liang, Juan Lopez, Margaux Lopez, Robert Lupton, Guido Maulen, Felipe Menanteau, Neill Mills, Glenn Morris, Freddy Munoz, Homer Neal, Douglas Neill, Scott Newbry, Andrei Nomerotski, Dmitry Onoprienko, Ian Ordenes, Juan Orellana, Shawn Osier, HyeYun Park, Steve Pietrowicz, Andres Plazas, Gary Poczulp, Brian Qiu, Bruno Quint, Heinrich Reinking, Michael Reuter, Tiago Ribeiro, Rodrigo Rojas, Sandra Romero, Rafe Schindler, Bill Schoening, Jacques Sebag, Alysha Shugart, Cristian Silva, Ioana Sotuela, Anthony Tache, Diego Tapia, John Thayer, Sandrine Thomas, Roberto Tighe, Tei-Wei Tsai, Max Turri, Tony Tyson, Luis Vergara, Christopher Walter, Oliver Wiecha, Van Xiong

Proceedings Volume 12184, 121840J (2022) https://doi.org/10.1117/12.2630184

KEYWORDS: Cameras, Telescopes, Imaging systems, Observatories, Interfaces, Control systems, Safety, Electronics, Device simulation

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Proceedings Article | 29 August 2022 Presentation

Vera C. Rubin Observatory. The final erection of the big and fast Rotating Enclosure

Gianpietro Marchiori, Simone De Lorenzi, Johana Martinez, Leonardo Ghedin, Tommaso Marchiori, Cristina Battistel, Cristiana Manfrin, Riccardo Bressan, Lorenzo Vio, Matteo Faccioni, Tiziano Niero, Victor Krabbendan, Jeff Barr, Doug Neill, Jacques Sebag, Eduardo Serrano, Hernan Herrera, Wouter van Reeven, German Schumacher, Oliver Wiecha, Chuck Gessner, Chuck Claver

Proceedings Volume 12182, 121821L (2022) https://doi.org/10.1117/12.2629174

KEYWORDS: Observatories, Telescopes, Manufacturing, Wind energy, Lead, Large Synoptic Survey Telescope, Design for manufacturability, Control systems, Cladding, Astronomy

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Proceedings Article | 26 August 2022 Poster + Paper

Utilization of a Dynalene chiller system to provide precision, lower risk, telescope top-end thermal control

David Jiménez Mejías, Douglas Neill, Neill Mills, Oliver Wiecha, Jeffrey Barr, Bill Schoening, Edward Hileman, Jordi Arellano Ballestero, Otger Ballester Basols

Proceedings Volume 12182, 121823Y (2022) https://doi.org/10.1117/12.2628909

KEYWORDS: Facility engineering, Telescopes, Cameras, Control systems, Observatories, Electronics

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Proceedings Article | 13 December 2020 Paper

Vera C. Rubin Observatory auxiliary telescope commissioning as a control system pathfinder

Patrick Ingraham, Andy Clements, Tiago Ribeiro, Michael Reuter, Merlin Fisher-Levine, Joshua Hoblitt, Robert Lupton, Sandrine Thomas, Christopher Stubbs, Kirk Arndt, Nick Callahan, Charles Claver, Franco Colleoni, Luis Corral, Peter Doherty, Frossie Economou, Angel Fausti Neto, Tim Jenness, Htut Khine, K. Simon Krughoff, Nicholas Mondrik, Felipe Menanteau, David Mills, William O'Mullane, Kevin Reil, Mario Rivera, Brian Stalder, Jacques Sebag, Ian Shipsey, Roberto Tighe, Adam Thornton, Andres Villalobos, Oliver Wiecha

Proceedings Volume 11452, 114520U (2020) https://doi.org/10.1117/12.2561112

KEYWORDS: Telescopes, Large Synoptic Survey Telescope, Control systems, Observatories, Lanthanum, Computer architecture, Software development

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Proceedings Article | 13 December 2020 Presentation + Paper

Rubin Observatory primary tertiary mirror cell assembly: integration and functional testing

Felipe Daruich, Douglas Neill, Edward Hileman, Christian Aguilar, Constanza Araujo, Claudio Araya, Michael Booth, Andy Clements, Franco Colleoni, Christopher Contaxis, Eric Coughlin, Ron Harris, Brian Johnson, Garry Knight, Juan Lopez, Neill Mills, Dave Mills, Gary Muller, Freddy Munoz, Ian Ordenes, Jacques Sebag, Edward Stover, Sandrine Thomas, Jeff Urban, Tomislav Vucina, Oliver Wiecha, Bo Xin

Proceedings Volume 11445, 114454B (2020) https://doi.org/10.1117/12.2561670

KEYWORDS: Mirrors, Large Synoptic Survey Telescope, Telescopes, Actuators, Optical instrument design, Mirror structures, Metrology, Sensors, Integration, Glasses

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Proceedings Article | 13 December 2020 Presentation + Paper

Rubin commissioning camera: integration, functional testing, and lab performance

Brian Stalder, Kevin Reil, Chuck Claver, Ming Liang, Tei Wei Tsai, Travis Lange, Justine Haupt, Oliver Wiecha, Margaux Lopez, Gary Poczulp, Diane Hascall, Douglas Neill, Jacques Sebag, Brian Johnson, Neill Mills, Myung Cho, Homer Neal, Scott Newbry, Shawn Osier, Rafe Schindler, Dmitry Onoprienko, Anthony Johnson, R. Glenn Morris, Max Turri, Alan Eisner, Stephen Cisneros, Van Xiong, Michael Huffer, Gregg Thayer, Ronald Harris, Anthony Borstad, Anthony Tache, William Schoening, J. Anthony Tyson, Craig Lage, Merlin Fisher-Levine, Robert Lupton, Andres Plazas, Felipe Menanteau, Htut Khine Htay Win, Stephen Pietrowicz, James Howard

Proceedings Volume 11447, 114470L (2020) https://doi.org/10.1117/12.2561132

KEYWORDS: Cameras, Large Synoptic Survey Telescope, Telescopes, Imaging systems, Optical instrument design, Electro optics, Sensors, Electronics, Control systems

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Proceedings Article | 6 July 2018 Paper

LSST M1M3 figure actuator final design, fabrication, and test

Gary Muller, Edward Hileman, Felipe Daruich, Michael Warner, Oliver Wiecha, Constanza Araujo, N. Mills, Brian Johnson, Edward Stover, Michael Booth, Ron Harris, Douglas Neill, William Gressler, Andrew Serio

Proceedings Volume 10700, 107003V (2018) https://doi.org/10.1117/12.2313598

KEYWORDS: Mirrors, Actuators, Servomechanisms, Large Synoptic Survey Telescope, Telescopes, Control systems, Interfaces, Glasses, Optical fabrication, Calibration

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The Large Synoptic Survey Telescope¹ (LSST) is an altitude-azimuth mounted three mirror telescope and camera. The primary (M1) and tertiary (M3) mirrors are integrated into a single, monolithic borosilicate substrate 8.42 m diameter. The annular secondary (M2) mirror is located above the M1M3 mirror and the camera is nested inside the M2. The M1M3 mirror is supported on a mirror cell by two independent systems: one system is for Active Mode and the other for Static Mode.

During observing, or Active Mode², the M1M3 mirror is supported by an array of 156 support and figure control actuators consisting of 268 pneumatic cylinders that react to gravity and inertial loads and provide figure error correction. Load cells on the actuators measure forces that are communicated to the M1M3 control system. However, the figure actuators do not define the mirror position. This is defined with six axially stiff linear actuators called hardpoints³ arranged in a hexapod pattern to restrain rigid body motion of the mirror in a kinematic fashion. By adjusting the length of each hardpoint, the mirror can be adjusted in all six degrees of freedom with respect to the cell. Displacement sensors and load cells on the hardpoints communicate displacements and forces to the control system, which processes the telemetry and issues force corrections to the figure actuators to zero out any loads and moments on the hardpoints.

In Static Mode, the M1M3 mirror is no longer supported by figure actuators and the position sensing of the hard point hexapod is inactive. A second support system consisting of 288 wire rope isolators called Static Supports come into play. The static supports mechanically capture the mirror whether in Active or Static Mode and in the event the mirror experiences motion beyond the active motion range in any direction. The static supports also safely support the mirror during seismic events for all elevation angles. In active mode, the static supports do not contact the mirror and thus, do not affect the mirror positioning or figure.

This paper focuses on the detailed design, development, testing, integration, and current status of the M1M3 pneumatic figure actuators.

Proceedings Article | 6 July 2018 Paper

The LSST commissioning camera status and progress

James Howard, Kevin Reil, Chuck Claver, Brian Stalder, Ming Liang, Tei-Wei Tsai, Travis Lange, Justine Haupt, Oliver Wiecha, Margaux Lopez, Gary Poczulp, Diane Hascall, Douglas Neill, Jacques Sebag

Proceedings Volume 10700, 107003D (2018) https://doi.org/10.1117/12.2312684

KEYWORDS: Cameras, Large Synoptic Survey Telescope, Telescopes, Sensors, Camera shutters, Charge-coupled devices, Optical filters, Interfaces, Cryocoolers

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Proceedings Article | 6 July 2018 Paper

LSST M1M3 active mirror support system optimized to accommodate rapid telescope motions

Felipe Daruich, Douglas Neill, Michael Warner, Edward Hileman, Myung Cho, Christoph Dribusch, Constanza Araujo, Michael Booth, Christopher Contaxis, Ron Harris, Brian Johnson, Garry Knight, Neill Mills, Gary Muller, Edward Stover, Oliver Wiecha, Bo Xin

Proceedings Volume 10700, 107003G (2018) https://doi.org/10.1117/12.2313724

KEYWORDS: Actuators, Mirrors, Telescopes, Control systems, Large Synoptic Survey Telescope, Sensors, Systems modeling, Active optics

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Proceedings Article | 6 July 2018 Paper

LSST primary/tertiary mirror cell assembly integration

Constanza Araujo-Hauck, Michael Booth, Christopher Contaxis, Andy Clements, Felipe Daruich, Ed Hileman, Brian Johnson, Neill Mills, Gary Muller, Ed Stover, Michael Warner, Oliver Wiecha, Douglas Neill, William Gressler

Proceedings Volume 10700, 1070035 (2018) https://doi.org/10.1117/12.2312231

KEYWORDS: Mirrors, Actuators, Large Synoptic Survey Telescope, Control systems, Telescopes, Optical fabrication, Sensors, Coating

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Proceedings Article | 6 July 2018 Presentation + Paper

LSST secondary mirror assembly

William Gressler, Douglas Neill, John Bagnasco, Paul Lotz, Dave Mills, Mike Warner, Oliver Wiecha, Gregory Bogan, James Ellis, Dale Zajac, Steven Szklany, Ronald Broccolo, Malcolm O'Sullivan, Frank Carbone, Cormic Merle

Proceedings Volume 10700, 1070019 (2018) https://doi.org/10.1117/12.2311316

KEYWORDS: Actuators, Mirrors, Optical fabrication, Optical testing, Spindles, Large Synoptic Survey Telescope, Telescopes, Control systems, Polishing, Surface finishing

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Proceedings Article | 19 August 2016 Paper

LSST telescope modeling overview

J. Sebag, J. Andrew, G. Angeli, C. Araujo, J. Barr, S. Callahan, M. Cho, C. Claver, F. Daruich, W. Gressler, E. Hileman, M. Liang, G. Muller, D. Neill, W. Schoening, M. Warner, O. Wiecha, B. Xin, Alfredo Orden Martinez, Manuel Perezagua Aguado, Luis García Marchena, Ismael Ruiz de Argandoña

Proceedings Volume 9911, 99112E (2016) https://doi.org/10.1117/12.2233178

KEYWORDS: Telescopes, Finite element methods, Systems modeling, Solid modeling, Mirrors, Actuators, 3D modeling, Large Synoptic Survey Telescope, Computer aided design, Large Synoptic Survey Telescope, Space telescopes

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Proceedings Article | 18 August 2016 Paper

Large Synoptic Survey Telescope mount final design

Shawn Callahan, William Gressler, Sandrine Thomas, Chuck Gessner, Mike Warner, Jeff Barr, Paul Lotz, German Schumacher, Oliver Wiecha, George Angeli, John Andrew, Chuck Claver, Bill Schoening, Jacques Sebag, Victor Krabbendam, Doug Neill, Ed Hileman, Gary Muller, Constanza Araujo , Alfredo Orden Martinez, Manuel Perezagua Aguado, Luis García-Marchena, Ismael Ruiz de Argandoña, Francisco Romero, Ricardo Rodríguez, José Carlos González, Marco Venturini

Proceedings Volume 9906, 99060M (2016) https://doi.org/10.1117/12.2232996

KEYWORDS: Telescopes, Large Synoptic Survey Telescope, Optical instrument design, Cameras, Computer programming, Mirrors, Telescopes, Large Synoptic Survey Telescope, Optical instrument design, Computer programming, Control systems, Switches, Computer aided design, Interfaces

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Proceedings Article | 8 August 2016 Paper

LSST primary/tertiary monolithic mirror

J. Sebag, W. Gressler, M. Liang, D. Neill, C. Araujo-Hauck, J. Andrew, G. Angeli, M. Cho, C. Claver, F. Daruich, C. Gessner, E. Hileman, V. Krabbendam, G. Muller, G. Poczulp, R. Repp, O. Wiecha, B. Xin, K. Kenagy, H. Martin, M. Tuell, S. West

Proceedings Volume 9906, 99063E (2016) https://doi.org/10.1117/12.2230012

KEYWORDS: Mirrors, Large Synoptic Survey Telescope, Polishing, Image quality, Surface finishing, Mirrors, Large Synoptic Survey Telescope, Polishing, Optical design, Finite element methods, Interferometry, Cameras, Actuators

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Proceedings Article | 27 July 2016 Paper

Final design of the LSST hexapods and rotator

Ryan Sneed, Douglas Neill, Scott Kidney, Constanza Araujo, William Gressler, Paul Lotz, Dave Milles, Jacques Sebag, Thomas Sebring, Mickael Warner, Oliver Wiecha

Proceedings Volume 9906, 99060K (2016) https://doi.org/10.1117/12.2231327

KEYWORDS: Large Synoptic Survey Telescope, Cameras, Actuators, Telescopes, Mirrors, Optical instrument design, Neodymium, Interfaces, Electromechanical design, Space telescopes

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Proceedings Article | 27 July 2016 Paper

Final design of the LSST primary/tertiary mirror cell assembly

Douglas Neill, Gary Muller, Ed Hileman, Joe DeVries, Constanza Araujo , William Gressler, Paul Lotz, Dave Mills, Jacques Sebag, Sandrine Thomas, Mike Warner, Oliver Wiecha

Proceedings Volume 9906, 99060Q (2016) https://doi.org/10.1117/12.2234016

KEYWORDS: Mirrors, Large Synoptic Survey Telescope, Control systems, Coating, Actuators, Mirror structures, Optical isolators, Cameras, Telescopes, Interfaces

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Proceedings Article | 27 July 2016 Paper

LSST secondary mirror system final design

Douglas Neill, Gregory Bogan, Dale Zajac, Constanza Araujo , William Gressler, Joe DeVries, Edward Hileman, Paul Lotz, Dave Mills, Sandrine Thomas, Thomas Sebring, Jacques Sebag, Mike Warner, Oliver Wiecha

Proceedings Volume 9906, 990667 (2016) https://doi.org/10.1117/12.2234021

KEYWORDS: Actuators, Mirrors, Large Synoptic Survey Telescope, Actuators, Optical fabrication, Telescopes, Sensors, Mirror structures, Control systems, Safety, Active optics

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Proceedings Article | 7 August 2014 Paper

LSST Inner Loop Controller (ILC) design and characterization

O. Wiecha, P. Lotz

Proceedings Volume 9151, 91512K (2014) https://doi.org/10.1117/12.2056671

KEYWORDS: Large Synoptic Survey Telescope, Actuators, Control systems, Mirrors, Telescopes, Switches, Analog electronics, Computer programming, Active optics, Sensors

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Proceedings Article | 22 July 2014 Paper

Baseline design of the LSST telescope mount assembly

Douglas Neill, Ed Hileman, Jacques Sebag, William Gressler, Oliver Wiecha, Michael Warner, John Andrew, Bill Schoening

Proceedings Volume 9145, 914518 (2014) https://doi.org/10.1117/12.2056432

KEYWORDS: Telescopes, Mirrors, Large Synoptic Survey Telescope, Cameras, Optical instrument design, Domes, Control systems, Interfaces, Capacitors, Space telescopes

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Proceedings Article | 22 July 2014 Paper

Baseline design and requirements for the LSST rotating enclosure (dome)

D. Neill, J. DeVries, E. Hileman, J. Sebag, W. Gressler, O. Wiecha, J. Andrew, W. Schoening

Proceedings Volume 9145, 91454O (2014) https://doi.org/10.1117/12.2056521

KEYWORDS: Telescopes, Camera shutters, Domes, Large Synoptic Survey Telescope, Space telescopes, Capacitors, Mirrors, Stray light, Control systems, Bridges

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Proceedings Article | 22 July 2014 Paper

LSST Telescope and site status

W. Gressler, J. DeVries, E. Hileman, D. Neill, J. Sebag, O. Wiecha, J. Andrew, P. Lotz, W. Schoening

Proceedings Volume 9145, 91451A (2014) https://doi.org/10.1117/12.2056711

KEYWORDS: Mirrors, Large Synoptic Survey Telescope, Telescopes, Cameras, Control systems, Actuators, Imaging systems, Coating, Optical fabrication, Calibration

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Proceedings Article | 17 September 2012 Paper

LSST secondary mirror assembly baseline design

Douglas Neill, William Gressler, Jacques Sebag, Oliver Wiecha, Mike Warner, Bill Schoening, Joe DeVries, John Andrew, German Schumacher, Edward Hileman

Proceedings Volume 8444, 84440J (2012) https://doi.org/10.1117/12.926654

KEYWORDS: Mirrors, Actuators, Control systems, Telescopes, Large Synoptic Survey Telescope, Sensors, Mirror structures, Optical fabrication, Electronics, Cameras

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Proceedings Article | 17 September 2012 Paper

Surface layer turbulence measurements on the LSST site El Peñon using microthermal sensors and the lunar scintillometer LuSci

J. Sebag, P. Zimmer, J. Turner, J. McGraw, V. Krabbendam, A. Tokovinin, Edison Bustos, M. Warner, O. Wiecha

Proceedings Volume 8444, 844469 (2012) https://doi.org/10.1117/12.927017

KEYWORDS: Sensors, Telescopes, Turbulence, Large Synoptic Survey Telescope, Stereolithography, Electroluminescence, Optical turbulence, Observatories, Data acquisition, Resistance

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Proceedings Article | 23 July 2010 Paper

Fast force actuators for LSST primary/tertiary mirror

Edward Hileman, Michael Warner, Oliver Wiecha

Proceedings Volume 7739, 773936 (2010) https://doi.org/10.1117/12.857785

KEYWORDS: Actuators, Mirrors, Large Synoptic Survey Telescope, Servomechanisms, Control systems, Telescopes, Optical instrument design, Space telescopes, Control systems design, Data communications

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Proceedings Article | 27 June 2006 Paper

Discovery Channel Telescope: progress and status

B. Smith, T. Bida, R. Millis, E. Dunham, O. Wiecha, H. Marshall

Proceedings Volume 6267, 626705 (2006) https://doi.org/10.1117/12.672500

KEYWORDS: Telescopes, Mirrors, Space telescopes, Buildings, Optical instrument design, Cameras, Control systems, Observatories, Imaging spectroscopy, Aerospace engineering

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Proceedings Article | 15 September 2004 Paper

Fully integrated control system for the Discovery Channel Telescope

Oliver Wiecha, Thomas Sebring

Proceedings Volume 5496, (2004) https://doi.org/10.1117/12.552019

KEYWORDS: Telescopes, Control systems, Computer programming, Cameras, Domes, Calibration, Human-machine interfaces, Sensors, Software development, Telecommunications

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Showing 5 of 28 publications

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