Flat sheet type micro-lens and production method therefor

摘要

The present invention provides a simple and low-cost flat microlens that can be used in various optical fields in a mechanically and thermally stable manner. A microlens is formed using a transparent DLC film ( 41 ). The DLC film ( 41 ) includes regions (Rmn) with graded indices of refraction. When a light beam passes through a region with graded indices of refraction, the light is focused.