Phase discontinuity sensing: a method for phasing segmented mirrors in the infrared

被引：71

作者：

Chanan, G ^{[1
]}

Troy, M ^{[1
]}

Sirko, E ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

来源：

APPLIED OPTICS | 1999年 / 38卷 / 04期

关键词：

D O I：

10.1364/AO.38.000704

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We describe a novel method for phasing segmented optics in which the signal is the difference between inside-of-focus and outside-of-focus long-exposure infrared images. A detailed algorithm based on a correlation of this difference image with theoretical images or templates is presented. In a series of tests of this phase discontinuity sensing (PDS) algorithm at the Keck 1 telescope, at a wavelength of 3.3 mu m, the rms piston error (averaged over the 36 primary mirror segments) was repeatedly reduced from approximately 240 to 40 nn or less. Furthermore, the PDS phasing solution was consistent with our previous phasing camera results (to within 66-nm rms), providing strong independent confirmation of this earlier approach. (C) 1999 Optical Society of America OCIS codes: 010.7350, 120.5050, 350.1260.

引用

页码：704 / 713

页数：10