Lightweight structure design of 2m large aperture primary mirror

Yupeng Jin; Xuemin Zhang; Xing Song; Jiawen Cai; Guang Jin

doi:10.1117/12.3046715

13 November 2024 Lightweight structure design of 2m large aperture primary mirror

Yupeng Jin, Xuemin Zhang, Xing Song, Jiawen Cai, Guang Jin

Author Affiliations +

Proceedings Volume 13280, Advanced Optical Manufacturing Technologies and Applications 2024; and Fourth International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2024); 132800I (2024) https://doi.org/10.1117/12.3046715
Event: Second Conference on Advanced Optical Manufacturing Technologies and Applications & Fourth Forum of Young Scientists on Advanced Optical Manufacturing, 2024, Xi'an, China

Abstract

With the continuous improvement of optical system imaging quality requirements in astronomy, aerospace engineering, laser technology and other fields, in order to capture lighter objects and improve image resolution, the size of the mirror is getting larger and larger. Therefore, to meet various usage scenarios and operational constraints, the lightweight design of large mirrors has become an important research focus. In this paper, the lightweight structure design of the primary mirror of the 2.0m large aperture mirror system is studied in terms of the lightweight form of the mirror back and the shape of the lightweight hole. With the increase in the size of the primary mirror, the traditional material will no longer be able to ensure a good surface shape, so high-strength, low-density silicon carbide (SiC) is used as the main mirror body material. To achieve a high lightweight rate and maintain high internal stiffness, the simulation examined triangular, fan-shaped, and rectangular lightweight holes on the back of the primary mirror to determine the most stable form. In addition, this paper also compares the full-open and semi-closed lightweight forms. Finally, the semi-closed triangular lightweight back structure was used, and the displacement deformation and mirror profile accuracy of the 2m large aperture mirror under X, Y and Z gravity conditions were checked by the finite element analysis software Hypermesh and Patran. The final mass of the 2m mirror main mirror structure is reduced by 78%, and the surface profile (RMS) achieves 𝜆/40.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yupeng Jin, Xuemin Zhang, Xing Song, Jiawen Cai, and Guang Jin "Lightweight structure design of 2m large aperture primary mirror", Proc. SPIE 13280, Advanced Optical Manufacturing Technologies and Applications 2024; and Fourth International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2024), 132800I (13 November 2024); https://doi.org/10.1117/12.3046715

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
13 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Lightweight mirrors

Mirrors

Design

Deformation

Mirror structures

Mirror surfaces

Deformable mirrors

Show All Keywords

Keywords/Phrases

Search In:

Publication Years