Research on neutral surface of lightweight, horizontally supported mirror

Pingwei Zhou; Shuyan Xu; Changxiang Yan; Xiaohui Zhang

doi:10.1117/1.OE.57.2.025107

27 February 2018 Research on neutral surface of lightweight, horizontally supported mirror

Pingwei Zhou, Shuyan Xu, Changxiang Yan, Xiaohui Zhang

Author Affiliations +

Optical Engineering, Vol. 57, Issue 2, 025107 (February 2018). https://doi.org/10.1117/1.OE.57.2.025107

Abstract

The surface distortion due to gravity can be minimized when the flexure is located at the mirror’s neutral surface. When the mirror has relatively small surface curvature and simple lightweight structure, the location of neutral surface can be calculated by empirical formula or can approximately coincide with the mirror’s center of gravity. Otherwise, it is insufficient to determine the exact location of neutral surface. In addition, when the torque stiffness of flexure cannot be neglected, the optimum mount location may deviate from neutral surface and should be determined by more sophisticated analysis. The RMS surface distortions will degenerate significantly when the flexure has deviations from the optimum axial mount location due to fabrication and assembly errors. The distortion sensitivity to support axial location is critical to achieving low surface distortions in practice. We demonstrate a method of calculating the exact location of neutral surface and optimum mount location. The sensitivity of surface distortion to support axial location is theoretically calculated and compared with the results obtained from finite element analysis.

Citation Download Citation

Pingwei Zhou, Shuyan Xu, Changxiang Yan, and Xiaohui Zhang "Research on neutral surface of lightweight, horizontally supported mirror," Optical Engineering 57(2), 025107 (27 February 2018). https://doi.org/10.1117/1.OE.57.2.025107

Received: 12 November 2017; Accepted: 9 February 2018; Published: 27 February 2018

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