an optical scanning device includes a substrate , which is etched to define an array of two or more parallel micromirrors and a support surrounding the micromirrors . respective spindles connect the micromirrors to the support , thereby defining respective parallel axes of rotation of the micromirrors relative to the support . one or more flexible coupling members are connected to the micromirrors so as to synchronize an oscillation of the micromirrors about the respective axes .