A near-infrared pyramid wavefront sensor for Keck adaptive optics

Real-time controller

Sylvain Cetre, Olivier Guyon, Charlotte Bond, Mark Chun, Dimitri Mawet, Peter Wizinowich, Charles Lockhart, Sean Goebel, Ed Wetherell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A new real-time control system will be implemented within the Keck II adaptive optics system to support the new near-infrared pyramid wavefront sensor. The new real-time computer has to interface with an existing, very productive adaptive optics system. We discuss our solution to install it in an operational environment without impacting science. This solution is based on an independent SCExAO-based pyramid wavefront sensor realtime processor solution using the hardware interfaces provided by the existing Keck II real-time controller. We introduce the new pyramid real-time controller system design, its expected performance, and the modification of the operational real-time controller to support the pyramid system including interfacing with the existing deformable and tip-tilt mirrors. We describe the integration of the Saphira detector-based camera and the Boston Micromachines kilo-DM in this new architecture. We explain the software architecture and philosophy, the shared memory concept and how the real-time computer uses the power of GPUs for adaptive optics control. We discuss the strengths and weaknesses of this architecture and how it can benefit other projects. The motion control of the devices deployed on the Keck II adaptive optics bench to support the alignment of the light on the sensors is also described. The interfaces, developed to deal with the rest of the Keck telescope systems in the observatory distributed system, are reviewed. Based on this experience, we present which design ideas could have helped us integrate the new system with the previous one and the resultant performance gains.

Original languageEnglish (US)
Title of host publicationAdaptive Optics Systems VI
EditorsDirk Schmidt, Laura Schreiber, Laird M. Close
PublisherSPIE
Volume10703
ISBN (Print)9781510619593
DOIs
StatePublished - Jan 1 2018
Externally publishedYes
EventAdaptive Optics Systems VI 2018 - Austin, United States
Duration: Jun 10 2018Jun 15 2018

Other

OtherAdaptive Optics Systems VI 2018
CountryUnited States
CityAustin
Period6/10/186/15/18

Fingerprint

Wavefront Sensor
Adaptive optics
Pyramid
Adaptive Optics
Wavefronts
pyramids
adaptive optics
controllers
Infrared
Infrared radiation
Real-time
Controller
Controllers
sensors
Sensors
Real time control
Observatories
Software architecture
Motion control
Telescopes

Keywords

  • Adaptive Optics
  • Pyramid Wavefront Sensor
  • Real-Time Control

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Cetre, S., Guyon, O., Bond, C., Chun, M., Mawet, D., Wizinowich, P., ... Wetherell, E. (2018). A near-infrared pyramid wavefront sensor for Keck adaptive optics: Real-time controller. In D. Schmidt, L. Schreiber, & L. M. Close (Eds.), Adaptive Optics Systems VI (Vol. 10703). [1070339] SPIE. https://doi.org/10.1117/12.2311781

A near-infrared pyramid wavefront sensor for Keck adaptive optics : Real-time controller. / Cetre, Sylvain; Guyon, Olivier; Bond, Charlotte; Chun, Mark; Mawet, Dimitri; Wizinowich, Peter; Lockhart, Charles; Goebel, Sean; Wetherell, Ed.

Adaptive Optics Systems VI. ed. / Dirk Schmidt; Laura Schreiber; Laird M. Close. Vol. 10703 SPIE, 2018. 1070339.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Cetre, S, Guyon, O, Bond, C, Chun, M, Mawet, D, Wizinowich, P, Lockhart, C, Goebel, S & Wetherell, E 2018, A near-infrared pyramid wavefront sensor for Keck adaptive optics: Real-time controller. in D Schmidt, L Schreiber & LM Close (eds), Adaptive Optics Systems VI. vol. 10703, 1070339, SPIE, Adaptive Optics Systems VI 2018, Austin, United States, 6/10/18. https://doi.org/10.1117/12.2311781
Cetre S, Guyon O, Bond C, Chun M, Mawet D, Wizinowich P et al. A near-infrared pyramid wavefront sensor for Keck adaptive optics: Real-time controller. In Schmidt D, Schreiber L, Close LM, editors, Adaptive Optics Systems VI. Vol. 10703. SPIE. 2018. 1070339 https://doi.org/10.1117/12.2311781
Cetre, Sylvain ; Guyon, Olivier ; Bond, Charlotte ; Chun, Mark ; Mawet, Dimitri ; Wizinowich, Peter ; Lockhart, Charles ; Goebel, Sean ; Wetherell, Ed. / A near-infrared pyramid wavefront sensor for Keck adaptive optics : Real-time controller. Adaptive Optics Systems VI. editor / Dirk Schmidt ; Laura Schreiber ; Laird M. Close. Vol. 10703 SPIE, 2018.
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