Electromagnetic rotation and magnetic attraction let a camera iris vary aperture while reducing friction and keeping the lens support stable.
Magnetic repulsion and coil-driven motion adjust aperture blades in a compact camera module, enabling DSLR-like aperture control in small devices.
Electromagnetic aperture actuation adjusts camera F-stops while magnetic attraction plates keep the lens support stable when inverted.
Circumferential coils, magnets, and Hall sensing let a compact camera aperture stay small while preserving driving force and positioning accuracy.