Design and thermal-optical analysis of a space telescope with a resolution better than 5 meters

Document Type : Original Article

Authors

1 Master's degree - Imam Hussein University - Tehran - Iran

2 Master's degree, Shahid Beheshti University, Tehran, Iran

3 Master's degree, Imam Hussein University, Tehran, Iran

4 Master's degree - Imam HusseinUniversity - Tehran - Iran

Abstract

Temperature variations lead to deformation of the optical and mechanical components of imaging payloads, and image quality is highly dependent on the optimized design of an imaging system. Thermal sensitivity of imaging payloads is therefore a major concern for aerospace manufacturers. To address this issue, active or passive thermo-optical control methods are typically employed. Prior to implementing such measures, thermal analysis is essential to identify critical components of the system.In this study, the optical design of a space telescope with a spatial resolution better than 5 meters is carried out, followed by the mechanical design of its mounts. Subsequently, a coupled thermo-optical analysis is performed using a three-dimensional finite element method. To calculate temperature transfer within the imaging system, a thermal model based on radiative heat transfer and energy exchange with the surrounding environment is developed. An optimized thermal simulation is then conducted, and the resulting non-uniform temperature distribution in the optical elements which leads to mechanical deformation is evaluated.For a temperature variation of 10 °C, the mechanical deformation of the optical components is analyzed using Zemax software. Finally, the simulation results are examined to identify the most thermally sensitive optical component by evaluating the modulation transfer function curves

Keywords

Radar
Volume 12, Issue 1 - Serial Number 31
Spring and summer
September 2024

Files

History

  • Receive Date: 04 June 2024
  • Revise Date: 23 July 2024
  • Accept Date: 12 August 2024
  • Publish Date: 22 August 2024

Share

How to cite

Statistics