Design and Experiment of a Reflective Baffle Based on High-Modulus Carbon Fiber Composite Materials

A reflective baffle for the optical system of a satellite camera based on the carbon fiber composite materials is designed and validated. Firstly, two typical reflective baffles including elliptical type and Stavroudis type are studied. High modulus carbon fiber composite materials are selected to achieve lightweight and high rigidity. The aluminum film is coated on the surface of vanes to enhance the surface spectral reflectivity. Then, temperature field under typical external heat flow is calculated and stray light suppression characteristics are analyzed. Finally, the finite element simulation and mechanical vibration experiment are performed to verify the reliability of the baffle structure. The results show that the reflective baffle meets the requirements of mechanical environment during the launch phase of satellite camera. It provides a reference for the design of the satellite camera baffles structure.