MICROLENS FOR ORGANIC EL ELEMENT, AND ORGANIC EL ELEMENT USING IT, AND METHOD OF PRODUCING THEM

PROBLEM TO BE SOLVED: To provide a microlens for an organic EL element which exhibits sufficiently high light extraction efficiency while reducing angle dependence of outgoing light and change in chromaticity sufficiently.SOLUTION: The microlens for an organic EL element arranged on the emission surface of the organic EL element is composed of a cured resin layer having irregularities formed on the surface. When a Fourier transform image is obtained by subjecting an irregularity analysis image obtained by analyzing the shape of the irregularities by means of an atomic force microscope to two-dimensional fast Fourier transformation, the Fourier transform image shows a circular or annular pattern substantially centered at an origin where the absolute value of wave number is 0 μm, and the circular or annular pattern exists in a region where the absolute value of wave number falls within 1 μm.