Optical characterization of two-dimensional array of 2048 tilting micromirrors for astronomical spectroscopy

被引:4
作者
Canonica, Michael D. [1 ]
Zamkotsian, Frederic [2 ]
Lanzoni, Patrick [2 ]
Noell, Wilfried [1 ]
De Rooij, Nico [1 ]
机构
[1] Ecole Polytech Fed Lausanne, Inst Microtechnol, CH-2002 Neuchatel, Switzerland
[2] Lab Astrophys Marseille, F-13388 Marseille 13, France
关键词
MOEMS DEVICES; INSTRUMENTATION; TELESCOPE;
D O I
10.1364/OE.21.022400
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A micromirror array composed of 2048 silicon micromirrors measuring 200 x 100 mu m(2) and tilting by 25 degrees was developed as a reconfigurable slit mask for multi-object spectroscopy (MOS) in astronomy. The fill factor, contrast, and mirror deformation at both room and cryogenic temperatures were investigated. Contrast was measured using an optical setup that mimics a MOS instrument, and mirror deformation was characterized using a Twyman-Green interferometer. The results indicate that the array exhibited a fill factor of 82%, a contrast ratio of 1000:1, and surface mirror deformations of 8 nm and 27 nm for mirrors tilted at 298 K and 162 K, respectively. (c) 2013 Optical Society of America
引用
收藏
页码:22400 / 22409
页数:10
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