Paper
9 July 1998 Gemini WFS CCDs and controllers
Author Affiliations +
Abstract
The Gemini telescopes implement active optics and atmospheric tip-tilt-focus correction through the use of a number of Shack-Hartmann wavefront sensors at several locations and providing various orders of wavefront data. All are based on a common Charge Coupled Device (CCD) housing and controller. This paper provides an overview of the electronics in the CCD head and controller. The two frame-transfer CCDs that are used (80 X 80 and 1024 X 1024), are described. A parameter based multiple subaperture readout algorithm is presented. The system is capable of operating at 2000 frames per second in a 2 X 2 subaperture mode with 36 pixels per subaperture and a read-noise floor of approximately 4.5 erms.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Brian Leckie and Tim Hardy "Gemini WFS CCDs and controllers", Proc. SPIE 3355, Optical Astronomical Instrumentation, (9 July 1998); https://doi.org/10.1117/12.316761
Lens.org Logo
CITATIONS
Cited by 1 scholarly publication.
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Charge-coupled devices

Digital signal processing

Video

Gemini Observatory

Clocks

Wavefront sensors

Stars

RELATED CONTENT

HIPO data products
Proceedings of SPIE (July 11 2008)
Gemini wavefront sensing subsystems
Proceedings of SPIE (February 04 2003)
Kepler instrument performance: an in-flight update
Proceedings of SPIE (August 05 2010)
Rubber focal plane for sky surveys
Proceedings of SPIE (December 24 2002)

Back to Top