A random number generator includes a plurality of groups of independent flip flops, each of the groups having different configurations. The chamfer determines an asymmetrical shape of the lamina. The modified scan list is of a reduced number of a reduced size relative to the formal scan list, thereby permitting subsequent selection, made from the modified scan list, by a selector of a target radio network to be made in a reduced amount of time. The light sensitive elements are arranged to receive pattern data carrying light beams and to convert the light beams into electrical signals. The reflected light makes a second pass from the distal side to the proximal side, and exits the lens at the proximal side, and is reflected by a scanning mirror.