Fig. 1: Schematic of rotary electrowetting on dielectric (EWOD) optical beam steering system.
From: Adaptive optical beam steering and tuning system based on electrowetting driven fluidic rotor

a The assembled EWOD rotor system. b The superlattice hub design with elliptical contact on the base. c The scanning optics projection micro-stereolithography (SOPµSL) system28. d The pre-ceramic hub. e The pyrolyzed silicone oxycarbide (SiOC) hub. The SOPµSL system is employed for reducing the weight of the hub while maintaining its ultrahigh stiffness.