# Research on Micro-Vibration Analysis of Segmented Telescope Based on Opto-Mechanical Integration

## TL;DR

This paper introduces a new method to analyze how micro-vibrations affect the image quality of segmented telescopes in space.

## Contribution

The study proposes a dynamic opto-mechanical integration analysis method for evaluating micro-vibration effects on segmented telescopes.

## Key findings

- The optical system's wavefront error RMS is less than 0.071λ at 1 μm wavelength over 4 seconds.
- Peak ratios of the point spread function reached 0.4628 (X-axis) and 0.6207 (Y-axis) with 2 seconds exposure.
- The method offers a reference for assessing imaging quality under long-exposure micro-vibration conditions.

## Abstract

Aiming at the inherent nature and complexity of the influence of in-orbit micro-vibration in the imaging quality of segmented telescopes, a dynamic full-link opto-mechanical integration analysis method is proposed. The method is based on the measured micro-vibration signals of the infrared refrigerator, using the finite element method to perform the transient response analysis of the opto-mechanical system in Patran/Nastran software. The interface tool is written by Matlab to achieve the calculation of rigid body displacement and real-time data interaction with Zemax. The results show that when the working wavelength is 1 μm, the optical system has a wavefront error Root-Mean-Square value of less than 0.071λ in 4 s. Evaluating the effect of micro-vibration on the imaging quality of the system in terms of the peak ratio of the point spread function. When the exposure time was 2 s, the ratio maximum values of 0.4628 and 0.6207 were reached for the X-axis and Y-axis, respectively. The method provides an important reference basis for the evaluation of imaging quality of an optical system under micro-vibration environment with a long exposure time.