| 摘要 |
PROBLEM TO BE SOLVED: To provide a method capable of imparting an uneven pattern of a nano-order over the perimeter of a metal film which is formed on a Fresnel shape by a vapor phase growth method .SOLUTION: There is provided a method for manufacturing a Fresnel lens equipped with a hole-shaped nano-pattern structure by using an insulator 20 having micro-pattern 22 which consists of a Fresnel surface 25 and a rising surface 26. The method comprises: a process of forming a conduction layer 40 made of a series of metal film, which covers a part of the Fresnel surface 25 and a part of the rising surface 26, on the micro-pattern 22 by a vapor phase growth method; a process of forming a metal film 30, which covers the Fresnel surface 25 and contacts with the conduction layer 40, on the micro-pattern 22 by the vapor phase growth method; a process of applying voltage to the metal film 30 through the conduction layer 40, and imparting a nano-pattern structure to an external surface 35 of the metal film 30 by an anodic oxidation method to form a structure layer; and a process of forming the Fresnel lens by using the insulator 20 on which the structure layer is formed as a prototype.SELECTED DRAWING: Figure 12 |
