Optomechanical analysis and testing of a fast steering secondary mirror prototype for the Giant Magellan Telescope

Andrew Corredor; Won Hyun Park; Myung Cho; Young-Soo Kim

doi:10.1117/12.2024141

18 September 2013 Optomechanical analysis and testing of a fast steering secondary mirror prototype for the Giant Magellan Telescope

Andrew Corredor, Won Hyun Park, Myung Cho, Young-Soo Kim

Author Affiliations +

Proceedings Volume 8836, Optomechanical Engineering 2013; 88360U (2013) https://doi.org/10.1117/12.2024141
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

The Giant Magellan Telescope (GMT) will be one of the next class of extremely large segmented mirror telescopes. The GMT will utilize two Gregorian secondary mirrors, and Adaptive Secondary Mirror (ASM) and a Fast-steering Secondary Mirror (FSM). The FSM consists of six off-axis mirrors surrounding a central on-axis circular segment. The segments are 1.1 m in diameter and conjugated 1:1 to the seven 8.4 m segments of the primary. A prototype of the FSM mirror (FSMP) has been developed, analyzed and tested in order to demonstrate the mechanical and optical responses of the mirror assembly when subjected to structural and thermal loadings. In this paper, the mechanical and thermal performances of the FSMP were evaluated by performing finite element analyses (FEA) in NX Nastran. The deformation of the mirror’s lateral flexure was measured when the FSMP was axially loaded and the temperature response of the mirror assembly was measured when exposed to a sample thermal environment. In order to validate the mirror/lateral flexure design concept, the mechanical, optical and thermal measurements obtained from the tests conducted on mirrors having two different lateral flexures were compared to the responses calculated by FEA.

Citation Download Citation

Andrew Corredor, Won Hyun Park, Myung Cho, and Young-Soo Kim "Optomechanical analysis and testing of a fast steering secondary mirror prototype for the Giant Magellan Telescope", Proc. SPIE 8836, Optomechanical Engineering 2013, 88360U (18 September 2013); https://doi.org/10.1117/12.2024141

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