A piston and tilt wavefront sensor dedicated to the cophasing of segmented optics in low light level conditions

被引：0

作者：

Rousseaux, Thomas ^{[1
]}

Primot, Jerome ^{[1
]}

Jaeck, Julien ^{[1
]}

Rouze, Bastien ^{[1
]}

Le Gall, Cecile ^{[1
]}

Bellanger, Cindy ^{[1
]}

机构：

[1] Univ Paris Saclay, DOTA, ONERA, F-91123 Palaiseau, France

来源：

OPTICS AND LASERS IN ENGINEERING | 2024年 / 181卷

关键词：

Pistil interferometry; Multiple-wave lateral shearing interferometry; Mirrors co-phasing; Wavefront sensing; Telescope; PHASE MEASUREMENT; FIBER LASERS; ARRAY; INTERFEROMETRY; MIRROR;

D O I：

10.1016/j.optlaseng.2024.108412

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a new interferometer to measure piston, tip and tilt of segmented mirrors, using the combination of an optical grating and a microlens array. Since this interferometer is able to collect all the incident light and to operate with a large spectra bandwidth, it is particularly suitable to operate in low light level conditions, for example for the co-phasing of segmented primary mirrors like James Webb Space Telescope. We tested our new device on a 37-segment deformable mirror and obtained an accuracy better than lambda/100. The measurement is self-referenced and errors can be estimated on the measurement itself thanks to closure relationships.

引用

页数：7

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