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Geoffrey P. Evans
Head Electronics at South African Astronomical Observatory
SPIE Involvement:
Author
Publications (5)
Proceedings Article | 9 August 2016 Paper
SpUpNIC (Spectrograph Upgrade: Newly Improved Cassegrain) on the South African Astronomical Observatory's 74-inch telescope
Lisa Crause, Dave Carter, Alroy Daniels, Geoff Evans, Piet Fourie, David Gilbank, Malcolm Hendricks, Willie Koorts, Deon Lategan, Egan Loubser, Sharon Mouries, James O'Connor, Darragh O'Donoghue, Stephen Potter, Craig Sass, Amanda Sickafoose, John Stoffels, Pieter Swanevelder, Keegan Titus, Carel van Gend, Martin Visser, Hannah Worters
Proceedings Volume 9908, 990827 (2016) https://doi.org/10.1117/12.2230818
KEYWORDS: Spectrographs, Cameras, Collimators, Mirrors, Telescopes, Diffraction gratings, Charge-coupled devices, Spectrographs, Cameras, Collimators, Diffraction gratings, Lamps, Optical alignment, CCD cameras
Proceedings Article | 23 July 2008 Paper
The image quality of the Southern African Large Telescope (SALT)
Darragh O'Donoghue, Eli Atad-Ettedgui, Luis Balona, Bruce Bigelow, John Booth, Lucian Botha, Janus Brink, David Buckley, Phil Charles, Alrin Christians, J. Christopher Clemens, Lisa Crause, Steven Crawford, Geoffrey Evans, Hitesh Gajjar, Yas Hashimoto, Malcolm Hendricks, Alexei Kniazev, Anthony Koeslag, Willie Koorts, Herman Kriel, Nicola Loaring, Jonathan Love, Fred Marang, Douglas Metcalfe, Brennan Meyer, James O'Connor, Charl du Plessis, Lawrence Ramsey, Encarni Romero-Colmenero, Craig Sass, Johann Scholtz, Ramotholo Sefako, Sandisa Siyengo, Martin Still, Ockert Strydom, Arkadiusz Swat, Johann Du Toit, Petri Vaisanen, Martyn Wells, Hannah Worters
Proceedings Volume 7018, 701813 (2008) https://doi.org/10.1117/12.788841
KEYWORDS: Mirrors, Telescopes, Monochromatic aberrations, Image quality, Cameras, Simulation of CCA and DLA aggregates, Image segmentation, Wavefront sensors, Wavefronts, Interfaces
Proceedings Article | 11 July 2008 Paper
A new two channel high-speed photo-polarimeter (HIPPO) for the SAAO
Stephen Potter, David Buckley, Darragh O'Donoghue, James O'Conner, Piet Fourie, Geoff Evans, Craig Sass, Lisa Crause, O. Butters, Andrew Norton, Koji Mukai, Martin Still
Proceedings Volume 7014, 70145E (2008) https://doi.org/10.1117/12.789716
KEYWORDS: X-ray astronomy, Astronomy, Beam splitters, Modulation, Polarization, Ultraviolet astronomy, X-rays, Ultraviolet radiation, Optical filters, Wave plates
Proceedings Article | 29 September 2004 Paper
High-speed SALT instrument CCD detectors
Darragh O'Donoghue, Luis Balona, Dave Carter, Geoff Evans, Piet Fourie, Willie Koorts, James O'Connor, Faranah Osman, Chantal Petersen, Hendrik Steyn
Proceedings Volume 5499, (2004) https://doi.org/10.1117/12.552910
KEYWORDS: Charge-coupled devices, Sensors, Space telescopes, Telescopes, Amplifiers, Observatories, Stars, CCD image sensors, Astronomy, Image resolution
Proceedings Article | 7 March 2003 Paper
SALTICAM, $0.5M-acquisition camera: every big telescope should have one
Darragh O'Donoghue, Etienne Bauermeister, David Carter, Geoffrey Evans, Willie Koorts, James O'Connor, Faranah Osman, Stan van der Merwe, Bruce Bigelow
Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.460772
KEYWORDS: Telescopes, Charge-coupled devices, Cameras, Lenses, Sensors, Image quality, Optical filters, Camera shutters, Ultraviolet radiation, Mirrors
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