Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Low-order aberration correction of the TMT tertiary mirror prototype based on a warping harness

Not Accessible

Your library or personal account may give you access

Abstract

A warping harness is proposed to simply and efficiently correct low-order aberrations that occur during manufacturing and operation of a telescope. For the Thirty Meter Telescope (TMT) tertiary mirror, the issue to be solved by the warping harness is particularly challenging due to its complicated load conditions and limited mounting space. In this study, first, a new type of whiffletree-based warping harness configuration applied to a ¼-prototype TMT tertiary mirror is presented and optimized using finite element analysis (FEA) to improve the output precision of the moment actuator. Next, based on the new configuration, a simulation method for a correction process is proposed. The results show that the root mean square value of the mirror-surface error converged from 64.9 to 25.4 nm after correction, which satisfied the requirement document of TMT. Finally, combined with the analysis and calculation results, the moment actuator testing system with high-precision displacement–force–strain is established to assess the system errors. The tests of the moment actuator displacement, stress, strain-output precision, linearity, and repeatability are completed, and all errors were found to be within a controllable range. The results show the validity and feasibility of the designed warping harness, which can prove its applicability in more complicated conditions and, to a certain degree, broaden the application scope of the warping harness.

© 2018 Optical Society of America

Full Article  |  PDF Article
More Like This
Performance improvement of the Giant Steerable Science Mirror prototype: calibration, added-on damping treatment, and warping harness

Qi-chang An, Jing-xu Zhang, Fei Yang, Hong-chao Zhao, and Liang Wang
Appl. Opt. 56(36) 10009-10015 (2017)

Deformable primary mirror for a space telescope

J. G. R. Hansen, R. M. Richard, and R. R. Shannon
Appl. Opt. 21(14) 2620-2630 (1982)

Development of a prototype active optics system for future space telescopes

Nicholas Devaney, Fiona Kenny, Alexander V. Goncharov, Matthias Goy, and Claudia Reinlein
Appl. Opt. 57(22) E101-E106 (2018)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (19)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (7)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (7)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved