LIGHT-CONCENTRATING FILM, METHOD FOR PRODUCING SAME, FOCUSING ELEMENT, SOLAR CELL, AND FOCUSING METHOD

摘要

The present invention provides a focusing method and a light-concentrating film capable of concentrating incident light in a wide angular range with high efficiency, a focusing element including the light-concentrating film, and a solar cell. The present invention is a light-concentrating film that is made of an organic material, and is characterized by having a multilevel gradation pattern.