Each subcell measures 1 × 1 mm2 and incorporates 2 × 2 quadratically arranged positions for the droplet.
Johannes Strassner, Carina Heisel, Dominic Palm, Henning Fouckhardt 2018, 'Microfluidic Droplet Array as Optical Irises Actuated via Electrowetting', Advances in OptoElectronicshttp://dx.doi.org/10.1155/2018/1262947. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)