Optimal Design of Large-Aperture Mirror to Minimize Wavefront Error and Weight

As the importance of telescopes in artificial satellites is high, research on improving the performance of reflectors is necessary. However, decreasing the wavefront error improves the performance but also increases the weight. In this study, we propose a multi-purpose optimal design pattern in the triangular and hexagonal forms at the rear surface of a mirror that can simultaneously improve the wavefront error and are lightweight. Errors that could occur during the simulation process were reduced through the analysis of the finite element analysis settings, and the possible pattern tendency of wavefront error reduction and being lightweight was identified in the design stage. The shape generated through analysis is applied to the optimal design algorithm to derive the optimal shape for each pattern. By performing multi-purpose optimization design based on two different patterns, it was confirmed that the application of the hexagonal pattern produced better optimal results than the triangular pattern.