Grism cryogenic mount for the Euclid-NISP mission

被引：0
|
作者：
Rossin, Ch. [1 ]
Grange, R. [1 ]
Sanchez, P. [1 ]
Caillat, A. [1 ]
Costille, A. [1 ]
Laurent, P. [1 ]
Dessaux, F. [1 ]
Ceria, W. [1 ]
机构：
[1] Aix Marseille Univ, CNRS, LAM, UMR 7326, F-13388 Marseille, France
来源：
ADVANCES IN OPTICAL AND MECHANICAL TECHNOLOGIES FOR TELESCOPES AND INSTRUMENTATION | 2014年 / 9151卷
关键词：
grism; Invar mount; cryogenic temperature; vibration tests; FE analyses;
D O I：
10.1117/12.2055819
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The spectroscopic channel of the Euclid Near Infrared SpectroPhotometer (NISP) relies on four grisms mounted on a wheel via Invar mounts. The mount design was studied to maintain the optical performances and alignment at cryogenic operating temperature (120K), and to survive launch vibrations. We designed two stages of radially compliant blades: one set of 9 blades is bonded to the Silica grism and the second set of 3 blades is located at interface points with the wheel. Severe packaging and mass constraints yielded us to design a ring mount with strong weight relief. In fall 2013 we proceeded to thermal cycling (323K-105K), vibration tests (10.7 g rms) to successfully qualify the grism mount in the Euclid environment. Thanks to detailed finite element analyses, we correlated simulations and tests.
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页数：10
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