Cost-efficient electromagnetically-actuated rotational adaptive mirror design

This article showcases the innovative use of polymers, reflective polyester, and various flexible films to develop adaptable rotational mirrors. These mirrors employ rotation as a mechanism to amend images tainted by surface inconsistencies. Made with a self-standing Mylar polyester film, the mirror spans 120mm and has a 1mm thickness. Electromagnetic actuation, coupled with a magnetic electrode matrix underneath, allows for the mirror surface's modulation, adjusting the focal point. The inherent mechanical characteristics of the Mylar film mean minimal deflection is necessary for focal changes, heightening the mirror's adaptability and electromagnetic sensitivity. Additionally, the construction process remains uncomplicated and cost-effective. The mirror prototype is designed with two analogous membranes that rotate in harmony around their midpoint, ensuring uniform distribution of the electromagnetic deflection forces. This mirror's functionality was effectively proven by its capability to rectify and refocus images. Distinctly, the mirror boasts rotational dynamics, a partitioned surface to diminish the influence of surface irregularities, and the proficiency to reshape its curvature and focal point in motion. Such innovations are ideal for MEMS devices, aiming for cost efficiency while working with less pristine reflective surfaces.