Key challenges for the production of ELT M1 segments at Safran Reosc

被引：2

作者：

Frapolli, Camille ^{[1
]}

Bardon, Dominique ^{[1
]}

Ferachoglou, Nicolas ^{[1
]}

Chaussat, Gilles ^{[1
]}

Haret, Laurent-Daniel ^{[1
]}

Hatzigeorgopoulos, Justine ^{[1
]}

Armougom, Julie ^{[1
]}

Pron, Mathieu ^{[1
]}

Lesongeur, Pauline ^{[1
]}

Boillet, Frederic ^{[2
]}

Bourgois, Remi ^{[2
]}

Denis, Alain ^{[2
]}

Julienne, Sebastien ^{[2
]}

Gouedard, Marc ^{[2
]}

Foerster, Andreas ^{[3
]}

Cayrel, Marc ^{[3
]}

机构：

[1] Safran Reosc, Ave Tour Maury, F-91280 St Pierre Perray, France

[2] Safran Elect & Def, Ave Hauts Chaume, F-86280 St Benoit, France

[3] ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany

来源：

ADVANCES IN OPTICAL AND MECHANICAL TECHNOLOGIES FOR TELESCOPES AND INSTRUMENTATION V | 2022年 / 12188卷

关键词：

segmented mirror; polishing; metrology; ion beam figuring; ELT; bonding; surface deformation; factory; 4.0;

D O I：

10.1117/12.2626800

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In 2017, the European Southern Observatory (ESO) awarded a contract for the manufacturing of the segments of the primary mirror for the Extremely Large Telescope (ELT) to Safran Reosc. Since then, we designed a production unit dedicated for ELT M1. From spherical mirror blanks, we first glue 39 pads per segment. We then shape, polish and cut the segments with 133 different off-axis aspheric definitions. We finish them to nanometer accuracy using ion beam figuring and a fully automated interferometric test bench. Now manufacturing has begun, we present the solutions and methods that we developed to manufacture more than one segment per day.

引用

页数：13

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