Patent ID: 7864450

Claim:
A method of producing a microlens array sheet comprising the steps of: preparing a light-shielding base having a first surface and a second surface opposite to the first surface; attaching a microlens array having a plurality of microlens on the first surface of the light-shielding base so that a focal point of each microlens is located in the vicinity of the second surface of the light-shielding base, thus producing a microlens array base structure; emitting a laser beam to the microlens array base structure so that the beam is focused onto the focal point of each microlens in a direction orthogonal to the light-shielding base, thus removing a part of the light-shielding base to form an aperture that correspond to each microlens, the aperture having a conical trapezoid-like shape in which a size of the aperture on the first surface side is larger than another size of the aperture on the second surface side; providing a transparent double-sided adhesive sheet on the second surface of the light-shielding base; and attaching a transparent reinforcing base to the second surface via the adhesive sheet, thus bonding the transparent reinforcing base to the microlens array base structure.