THIN FILM OPTICAL LENS HAVING MICROSTRUCTURES, DESIGN METHOD AND LIGHTING DEVICE

摘要

A thin film optical lens that has microstructures, comprising: at least one lens unit (1), the lens unit (1) comprising a light incident surface and a light emergent surface, and the light incident surface being provided with: a first microstructure (11) that maintains the original propagation direction of light, a second microstructure (12) that controls the propagation direction of the light by means of refraction, and a third microstructure (13) that controls the propagation direction of the light by means of total internal reflection. The lens unit (1) controls the propagation path and the propagation direction of incident light by means of the first microstructure (11), second microstructure (12) and third microstructure (13).