ALFA: Adaptive optics for the Calar Alto observatory optics, control systems, and performance

被引：27

作者：

Kasper, M

Looze, DP

Hippler, S

Herbst, T

Glindemann, A

Ott, T

Wirth, A

机构：

[1] Max Planck Inst Astron, D-69117 Heidelberg, Germany

[2] Univ Massachusetts, Amherst, MA 01003 USA

[3] European So Observ, D-37075 Garching, Germany

[4] Max Planck Inst Extraterr Phys, D-37075 Garching, Germany

[5] Adapt Opt Associates Inc, Cambridge, MA USA

来源：

EXPERIMENTAL ASTRONOMY | 2000年 / 10卷 / 01期

关键词：

adaptive optics; modal aliasing; modal control; wavefront sensing;

D O I：

10.1023/A:1008165402336

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The adaptive optics system ALFA differs in some aspects from systems like ADONIS and PUEO which have delivered scientific results since years. Interchangeable lenslet arrays with different numbers of subapertures and a deformable mirror with many more actuators than the number of corrected modes result in some peculiarities in the calibration of the system and the reconstruction of incident wavefronts. We describe the design of ALFA's optics and its modal control architecture with a focus on a comparative study of the performance of different mode sets used to correct the wavefront aberrations. An outlook on our plans to improve and simplify the use of ALFA is given. The last section is dedicated to issues related to observing with ALFA in its present state. Expected Strehl ratios for different seeing conditions and guide star magnitudes are summarized in a table. AO observations in general, direct imaging and doing spectroscopy with ALFA in particular are discussed.

引用

页码：49 / 73

页数：25

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