A pixel array and an image sensor including the pixel array having improved sensitivity and can drive pixels with high resolution, according to embodiments. The geometry of the elements is configured to focus the outgoing beam in the elevation direction so as to improve the images of target regions located at or about a particular radial distance. Singulation of individual chip packages from the leadframe strip is then performed by saw singulation or die punching. The rocker arm assembly further comprises a cam follower disposed about a mounting shaft extending into shaft openings defined by the side walls, and a pin member defining a valve pad for engagement with a stem tip portion, the pin member extending into pin openings defined by the side walls.