2025/11/14 by Xin Yan, Yan, Xin, Zhuang, Zhi-Kang +10
Biochemistry, Genetics and Molecular Biology · Engineering · #Advanced Surface Polishing Techniques #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Lipid Membrane Structure and Behavior #Optics (physics.optics) #Structural Analysis and Optimization
paper · pdf · doi:10.48550/arxiv.2511.11049
openalex publication_date 2025/11/14 · openalex created_date 2025/11/18 · openalex updated_date 2026/07/28
Reflective membrane mirrors provide a lightweight, low-cost alternative to traditional optics for next-generation large-aperture telescopes, but their non-rigid, thin structure poses challenges for surface metrology. We present a phase-measuring deflectometry (PMD) system enhanced with tailored ray-tracing and iterative reconstruction to enable non-contact measurement of large membrane optics. The system successfully characterizes the surface figure and evaluates the dynamic stability of a 1-meter Hencky-type membrane mirror. Our results demonstrate the effectiveness of PMD as a practical metrology tool for future membrane-based telescope systems.