Optimization of mirror mount design based on opto-mechanical performance for space applications

A new fixation type for mirror assembly was proposed in space telescope. The optomechanical design of a large aperture is necessary to maintain the stability of the optical structure regarding environmental disturbances, restrictions on the weight, size and shape of the mirror, which must be satisfied for space applications. This paper presents a study focusing on the optimal optomechanical design for mirror mounting using glue pad bonding. We have developed a new design specifically tailored for the BK-7 mirror with a diameter of 500 mm and a thickness of 45 mm. The primary aim of this research is to determine the optimal combination of glue pad number, size, and thickness to minimize both glue stress and errors in the mirror’s shape. To achieve this, we conduct simulations under various load cases, varying the size and thickness of the glue pads. The new design results demonstrate the effectiveness of the proposed optimization method, which greatly minimizes thermal stress in the mirror and ensures adequate supporting stiffness. This solution for the mirror and mount design can provide valuable support to decision-makers and optical engineers during the development phase of space optomechanical systems.