Discharging stability and resolution power between a specified pixel and a pixel of an identical color adjacent with the specified pixel forming a stripe pattern of an optical device constituting by arranging plural elongate pixels on a substrate by using an ink jet printing apparatus are intended to be improved, wherein an optical device is manufactured by determining plural discharging positions to the inside of each of the pixels of an optical device, determining the plural discharging positions to the positions different from each other in the longitudinal direction of the pixel, specifying each of the plural nozzles with a natural number n counted sequentially from the end of the pixel, defining a surplus as b when dividing the natural number with a repetitive number a (b is an integer satisfying: 0≦b≦a−1), corresponding the surplus b to each of the plural nozzles, and printing the pixel by repeating the unit step of conducting discharge from the nozzles corresponding to the surplus b.