Title
The opto-mechanical performance prediction of thin mirror segments for E-ELT
Author
Nijenhuis, J.R
Hamelinck, R.F.M.M.
Braam, B.C.
Publication year
2012
Abstract
The mirror segments for the E-ELT and TLT are nearly equal in size and shape (hexagonal, 1.2 m over flat sides). They are very thin (about 50 mm) compared to their size. Supporting these mirrors and obtaining high optical performance is a challenge from design and manufacturing point of view. TNO has designed and build (together with VDL-ETG) three identical prototypes for supporting the mirror segments of the E-ELT. These mirror segments vary in size. Hence the gravity induced deformation of the mirror segments will vary from mirror to mirror segment when no measures are taken. The paper will concentrate on the design and analysis of the design features within the support structure to minimize the mirror deformation due to gravity. These features concern passive and active means to influence the mirror segment shape and to compensate for deformation differences. © 2012 SPIE.
Subject
Adaptive optics
ELT
M1 support structure
Opto-mechanics
Warping harness
High Tech Systems & Materials
Industrial Innovation
Mechatronics, Mechanics & Materials
OM - Opto-Mechatronics
TS - Technical Sciences
To reference this document use:
http://resolver.tudelft.nl/uuid:28838c35-e20a-48e5-8a0a-5b42f2fb0190
TNO identifier
469545
ISBN
9780819491510
ISSN
0277-786X
Source
Modern Technologies in Space- and Ground-Based Telescopes and Instrumentation II, 1-6 July 2012, Amsterdam, Netherlands, 8450 (8450)
Series
Proceedings of SPIE - The International Society for Optical Engineering
Document type
conference paper