PSEUDO RANDOM DOT PATTERN AND CREATION METHOD OF SAME

A pseudo random dot pattern is easily created by a geometric approach. A pseudo random dot pattern 1A is created by arranging zigzag arrangements R at a predetermined pitch in an x direction on an xy plane while periodically altering positions thereof in a y direction, the zigzag arrangements R each including an arrangement Rb and an arrangement Rc repeatedly provided at predetermined intervals in the y direction, the arrangement Rb including dots arranged at a positive inclination, the arrangement Rc including dots arranged at a negative inclination.