Open AccessSolving, analyzing, manufacturing, and experimental testing of thickness distribution for a cycloid-like variable curvature mirror
Author(s) -
Xuemei Xie,
Liang Xu,
Yongjie Wang,
Le Shen,
X. Fan,
Wenhui Fan,
Chuang Li,
Hui Zhao
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.426989
Subject(s) - cycloid , curvature , optics , materials science , finite element method , deformation (meteorology) , mechanics , physics , geometry , mathematics , composite material , reducer , thermodynamics
A cycloid-like variable curvature mirror (VCM) for zoom-imaging systems was investigated. An analytical-deformation solution to a thin-elastic plate with a cycloid-like thickness distribution and simply supported boundary condition under uniform pressure was found using a small parameter method. The finite-element analysis of the thin-elastic plate and designed VCM showed a good correlation with the analytical solution. The VCM was manufactured and polished to the initial shape with a root mean square (RMS) of 1/80λ. Finally, with air-pressure-based actuation testing under 0.07 MPa, the VCM deforms approximately 36.89 µm and maintains the RMS surface performance of 1/10λ, 1/40λ with and without spherical aberrations, respectively.