Design of an E-ELT M1 segment measurement machine with nanometer accuracy

A. Bos; R. Henselmans; P. C. J. N. Rosielle; M. Steinbuch; M. J. A. te Voert

doi:10.1117/12.2055143

18 July 2014 Design of an E-ELT M1 segment measurement machine with nanometer accuracy

A. Bos, R. Henselmans, P. C. J. N. Rosielle, M. Steinbuch, M. J. A. te Voert

Proceedings Volume 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation; 91510X (2014) https://doi.org/10.1117/12.2055143
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

The baseline design of the European Extremely Large Telescope features a telescope with a 39-meter-class primary mirror (M1), consisting of 798 hexagonal segments. A measurement machine design is presented based on a non-contact single-point scanning technique, capable of measuring the form error of each segment with nanometer uncertainty, fast, and with low operational costs. The implementation of a tactile precision probe eliminates the need for the CMM in the earlier segment manufacturing process. Preliminary assessment show nanometer-level uncertainty after calibration.

Citation Download Citation

A. Bos, R. Henselmans, P. C. J. N. Rosielle, M. Steinbuch, and M. J. A. te Voert "Design of an E-ELT M1 segment measurement machine with nanometer accuracy", Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91510X (18 July 2014); https://doi.org/10.1117/12.2055143

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available