Patent ID: 9341334
Filing Date: 2016-05-17
CPC Classification: B29D,E06B,F21S,G02B,Y02B

Claim Text:
1. An optical film comprising: a daylighting layer; a support next to one side in a thickness direction of the daylighting layer and extending in a first direction orthogonal to the thickness direction, wherein the daylighting layer includes a plurality of transparent layers configured to transmit light and a plurality of reflection layers configured to reflect light, the plurality of transparent layers and the plurality of reflection layers are alternately disposed in the first direction, one end portions of the plurality of transparent layers and the plurality of reflection layers are in contact with the support, the plurality of transparent layers include a first transparent layer and a second transparent layer that has a smaller index of refraction than that of the first transparent layer, the first transparent layer is formed from a transparent first resin material, and the second transparent layer is formed from a transparent second resin material having a smaller index of refraction that that of the first resin material.