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Optimization and Analysis of Large-Aperture Ultrathin Mirror Based on Multiphysics Coupling.

Yuzhe Wang^1,2, Zhonghuai Wu¹

¹School of Interdisciplinary Science, Beijing Institute of Technology, Beijing 100081, China.

Sensors (Basel, Switzerland)

|July 15, 2026

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This study presents a multiphysics coupling method for optimizing large-aperture ultrathin mirrors. The novel approach significantly reduces mirror mass while maintaining high surface accuracy and structural stability for space telescopes.

Area of Science:

Optical engineering
Materials science
Aerospace engineering

Background:

Space telescope mirror design faces challenges in balancing lightweight properties, environmental adaptability, and surface accuracy.
Large-aperture ultrathin mirrors are critical for advanced space optics but present significant structural and performance hurdles.

Purpose of the Study:

To develop and validate an optimization method for large-aperture ultrathin mirrors using multiphysics coupling.
To achieve simultaneous lightweighting, enhanced environmental adaptability, and high surface accuracy in space telescope mirrors.

Main Methods:

Finite element method and thermoelasticity theory were employed to model the coupled thermal and mechanical fields.
Topology optimization and parameter optimization techniques were combined to determine the optimal mirror structure.

Keywords:

large-aperture ultrathin mirror lightweighting multiphysics coupling optimization method simulation analysis

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Last Updated: Jul 16, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

P-norm was utilized to address non-smoothness issues in sensitivity analysis.

Main Results:

The optimized mirror design achieved an 82.04% mass reduction compared to a solid mirror.
The optimized mirror met surface accuracy requirements under simulated temperature and gravity conditions.
The mirror demonstrated improved dynamic response with a maximum amplification factor of 4.39, ensuring structural stability.

Conclusions:

The proposed multiphysics coupling optimization method offers a feasible approach for designing lightweight, environmentally adaptable, and high-accuracy mirrors.
This method is crucial for advancing the structural integrity and performance of mirrors in demanding space environments.