A light emitting device includes a p-type semiconductor layer, an n-type semiconductor layer and an active region between the p-type semiconductor layer and the n-type semiconductor layer. The occulter shape suppresses diffraction at any given size or angle and is practical to build because it can be made binary to avoid scatter. The method determines a property of a media to be fused in the fuser apparatus, and controls a speed of the fuser cleaner web based on the determined property of the media. The piezo-actuated brake includes a piezoelectric element connected to the clamping structure to move the brake elements together, thus applying a braking force to the disk.