Optical configurations with two or more micro structured films

摘要

The invention provides a lighting unit (10) comprising (i) an arrangement (111) of a plurality of light source units (100) configured to provide corresponding light source unit light (101), (ii) a first foil (210) comprising a plurality of transmissive first foil regions (211), wherein each first foil region (211) comprises a plurality of optical elements (212), and (iii) a second foil (220) comprising a plurality of transmissive second foil regions (220), wherein each second foil region (221) comprises a plurality of optical elements (222), wherein each light source unit (100) has a corresponding first foil region (211) configured downstream of said light source unit (100) and a corresponding second foil region (221) configured downstream of said first foil region (211).

主权项

1. A lighting unit, comprising:
an arrangement of a plurality of light source units configured to emit light; a first foil comprising a plurality of transmissive first foil regions, wherein each first foil region comprises a plurality of optical elements comprising an optical element with refractive functionality to the light source unit light in a center of each region and a different optical element with total internal reflection functionality to the light source unit light in a peripheral area remote from said center in each region; and a second foil comprising a plurality of transmissive second foil regions, wherein each second foil region comprises a plurality of optical elements wherein each second foil region comprises at its center an optical element with refractive functionality to the light source unit light and in a peripheral area remote from its center a different optical element with total internal reflection functionality to the light source unit light; wherein each light source unit has a corresponding first foil region configured downstream of said light source unit and a corresponding second foil region configured downstream of said first foil region.