Patent ID: 6985298

Claim:
A method of producing a microlens array having a double structure, comprising: a first patterning step of forming a first optical resin layer on a first support and forming two-dimensionally arrayed first microlens planes on the front surface of said first optical resin layer; a first planarizing step of filling irregularities of the first microlens planes with an optical resin having a refractive index different from that of said first optical resin layer, and planarizing the front surface, opposed to the microlens planes, of said optical resin, to form a first microlens array; a second patterning step of forming a second optical resin layer on a second support and forming two-dimensionally arrayed second microlens planes on the front surface of said second optical resin layer; a second planarizing step of filling irregularities of the second microlens planes with an optical resin having a refractive index different from that of said second optical resin layer, to form a second microlens array; and a joining step of joining the planarized surface of said first microlens array to the planarized surface of said second microlens array in a state that the first microlens planes are aligned to the second microlens planes, thereby integrating said first and second microlens arrays to each other wherein the first optical resin layer is made from a UV-cure type resin having a low refractive index.