ADAPTIVE OPTICS FOR DIFFRACTION-LIMITED INFRARED IMAGING WITH 8-M TELESCOPES

被引：91

作者：

SANDLER, DG ^{[1
]}

STAHL, S ^{[1
]}

ANGEL, JRP ^{[1
]}

LLOYDHART, M ^{[1
]}

MCCARTHY, D ^{[1
]}

机构：

[1] UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 1994年 / 11卷 / 02期

关键词：

D O I：

10.1364/JOSAA.11.000925

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

When equipped with adaptive optics, the coming generation of large 6-10-m telescopes can combine huge light grasp with very sharp images. We describe a specific design concept for recovery of diffraction-limited images in the 1.6- and the 2.2-mu m atmospheric windows, yielding 0.05-arcsec resolution for an 8-m telescope. Our goal has been to achieve this performance routinely by not requiring above-average atmospheric conditions or the use of unusually bright nearby stars. Atmospheric blurring is sensed with a sodium laser beacon of a few watts. Image motion is sensed by starlight, with a quadrant detector that is sensitive to the broad infrared band in which photon flux is typically largest and the field star has been sharpened by laser-beacon correction that is shared with the science target. A detailed performance analysis shows that for typical conditions Strehl ratios of > 25% are expected at 2.2 mu m, with the probability of finding a sufficiently bright field star exceeding 50%.

引用

页码：925 / 945

页数：21

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