Rodolphe Conan
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View article: Giant Magellan Telescope Adaptive Optics Overview
Giant Magellan Telescope Adaptive Optics Overview Open
The 25.4 m diameter Giant Magellan Telescope will have four first-generation observing modes: Natural seeing, ground- layer AO, natural guide star AO, and laser tomography AO. These control modes are enabled by a suite of wavefront sensors…
View article: Rolling shutter detector data flow strategies to push the limits of AO performance
Rolling shutter detector data flow strategies to push the limits of AO performance Open
Adaptive Optics (AO) improves the image quality of ground-based telescopes, by compensating in real-time for the blurring effects of atmospheric turbulence. AO systems of future Extremely Large Telescopes (ELTs) will have to operate at muc…
View article: Cryogenic detector preamplifer developments at the ANU
Cryogenic detector preamplifer developments at the ANU Open
We present a summary of the cryogenic detector preamplifier development programme under way at the ANU. Cryogenic preamplifiers have been demonstrated for both near-infrared detectors (Teledyne H1RG and Leonardo SAPHIRA eAPD as part of dev…
View article: Fast iterative tomographic wavefront estimation with recursive Toeplitz reconstructor structure for large-scale systems
Fast iterative tomographic wavefront estimation with recursive Toeplitz reconstructor structure for large-scale systems Open
Tomographic wavefront reconstruction is the main computational bottleneck to realize real-time correction for turbulence-induced wavefront aberrations in future laser-assisted tomographic adaptive-optics (AO) systems for ground-based giant…
View article: Modeling astronomical adaptive optics performance with temporally filtered Wiener reconstruction of slope data
Modeling astronomical adaptive optics performance with temporally filtered Wiener reconstruction of slope data Open
We build on a long-standing tradition in astronomical adaptive optics (AO) of specifying performance metrics and error budgets using linear systems modeling in the spatial-frequency domain. Our goal is to provide a comprehensive tool for t…
View article: PSF reconstruction via full turbulence characterization and end-to-end simulations
PSF reconstruction via full turbulence characterization and end-to-end simulations Open
Enhancement and wise archiving of astronomical images require an accurate estimate of the observational Point Spread Function (PSF).Although modelling of the telescope and its optics is a well-understood problem, PSF reconstruction becomes…
View article: The Giant Magellan Telescope Phasing System: algorithms and performance simulations
The Giant Magellan Telescope Phasing System: algorithms and performance simulations Open
The 25.4m Giant Magellan Telescope (GMT) consists of seven 8.4 m primary mirror (M1) segments with matching segmentation of the Gregorian secondary mirror (M2).When operating the telescope in the diffraction-limited Adaptive Optics (AO) ob…
View article: Avalanche photo diodes in the observatory environment: lucky imaging at 1-2.5 microns
Avalanche photo diodes in the observatory environment: lucky imaging at 1-2.5 microns Open
The recent availability of large format near-infrared detectors with sub-election readout noise is revolutionizing our approach to wavefront sensing for adaptive optics. However, as with all near infrared detector technologies, challenges …