Patent ID: 9285531
Filing Date: 2016-03-15
CPC Classification: G02B

Claim Text:
1. An optical device comprising a light source and an optical article, the optical article comprising a lightguide and a viscoelastic cladding layer, wherein the viscoelastic cladding layer comprises a pressure sensitive adhesive, wherein the viscoelastic cladding layer has an index of refraction lower by about 0.2 than an index of refraction of the lightguide and wherein the viscoelastic cladding layer is disposed on the lightguide, and wherein light emitted by the light source enters the lightguide and is reflected at at least a portion of an interface between the lightguide and the viscoelastic cladding layer; and wherein the interface between the lightguide and the viscoelastic cladding layer comprises a plurality of features oriented to extract light being transported within the lightguide.