METHOD FOR MANUFACTURING LENTICULAR LENS SHEET HAVING LIGHT SHIELDING ZONE

摘要

PROBLEM TO BE SOLVED: To form black stripes without forming projecting parts while suppressing increase of the number of processes and to secure a position precision to form a light shielding zone especially in a lenticular lens sheet of fine pitch. SOLUTION: Light rays 31 are made incident on a lenticular lens sheet 2 from its non-lens face side and are reflected on the lens face, and the intensity of reflected light is detected to obtain the position of a lenticular lens, namely, a position where the light shielding zone should be formed, and then the light shielding zone is formed there to secure the position precision. Light rays 31 may be made incident on the lenticular lens sheet 2 from its lens face side.