Influence of core and hexapod geometry, and local reinforcement on the performance of ultra lightweight ULE mirror

William R. Arnold; H. Phillip Stahl

doi:10.1117/12.2326017

17 September 2018 Influence of core and hexapod geometry, and local reinforcement on the performance of ultra lightweight ULE mirror

William R. Arnold, H. Phillip Stahl

Author Affiliations +

Proceedings Volume 10743, Optical Modeling and Performance Predictions X; 107430B (2018) https://doi.org/10.1117/12.2326017
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

The Habitable Exoplanet Observatory (HabEx) mission has unique optical performance requirements which drive the mirror design process beyond the traditional criteria. While mass and stiffness are still important, the response to inertia loading (expressed in terms of Zernike coefficients) to omni-directional excitation dominates the effort. While a Zerodur mirror is the current baseline, as mass budgets change, a ULE design is being studied as a potential alternative. This trade study looked at over 264 design variations using the Arnold Mirror Modeler and ANSYS^© to investigate the influence of various design elements, including: substrate thickness, core cell size, hexapod geometry and local reinforcement. Design ‘goodness’ was evaluated based on the mirror’s inertial deformation response to omni-directional input. This response was calculated via RSSing Zernike polynomial responses to (XYZ) accelerations.

Conference Presentation

Citation Download Citation

William R. Arnold and H. Phillip Stahl "Influence of core and hexapod geometry, and local reinforcement on the performance of ultra lightweight ULE mirror", Proc. SPIE 10743, Optical Modeling and Performance Predictions X, 107430B (17 September 2018); https://doi.org/10.1117/12.2326017

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