The opto-mechanical performance prediction of thin mirror segments for E-ELT

The opto-mechanical performance prediction of thin mirror segments for E-ELT

Nijenhuis, J.R.
Braam, B.C.
Hamelinck, R.F.M.M.

Riva, M. (editor)

2016

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.

Nano Technology
OM - Opto-Mechatronics
TS - Technical Sciences
High Tech Systems & Materials
Electronics
Industrial Innovation
Adaptive optics
ELT
E-ELT
M1 support structure
Opto-mechanics
Warping harness
Deformation
Ground supports
Design and analysis
Design features
Optical performance
Opto-mechanics
Size and shape
Support structures
Warping harness
Mirrors

http://resolver.tudelft.nl/uuid:07bbac6c-0247-4ccf-8f9d-785541632b72

572404

SPIE

9781510604322

0277-786X

Integrated Modeling of Complex Optomechanical Systems II, 7-9 October 2015, 10012

Proceedings of SPIE - The International Society for Optical Engineering

1001203

European Southern Observatory (ESO); National Institute for Astrophysics (INAF); OPTICON - Supported by the European Commission's FP7 Capacities Program

conference paper