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Gemini WFS CCDs and controllers
被引：5
作者：
Leckie, B
[1
]
Hardy, T
[1
]
机构：
[1] Natl Res Council Canada, Herzberg Inst Astrophys, Dominion Astrophys Observ, Victoria, BC V8X 4M6, Canada
来源：
OPTICAL ASTRONOMICAL INSTRUMENTATION, PTS 1 AND 2
|
1998年
/
3355卷
关键词：
wavefront sensor;
charge coupled device;
CCD;
Gemini telescopes;
D O I：
10.1117/12.316761
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 (80x80 and 1024x1024), are described. A parameter based multiple subaperture readout algorithm is presented. The system is capable of operating at 2000 frames per second in a 2x2 subaperture mode with 36 pixels per subaperture and a read-noise floor of approximately 4.5 erms.
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页码：529 / 538
页数：4
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