Patent ID: 8503080
Filing Date: 2013-08-06
Classification: C08K,C09J,G02B

Abstract:
1. An optical element, comprising: a) a first layer comprising a first material having a refractive index n b) a second layer comprising a second material having a refractive index n c) a diffraction structure at an interface between the first layer and the second layer, wherein: the first material and/or the second material is obtained by curing an optical adhesive, the optical adhesive is based on an epoxy adhesive or a thiolene system and comprises a compound selected from the group consisting of: bis-[4-(2,3-epoxypropylthio)-phenyl] sulfide; N,N-diglycidyl-4-glycidyl-oxyaniline; bis-(3,4-epoxycyclohexyl) adipate; polyethylene glycol; bis-(4-vinylthiophenyl) sulfide; and pentaerythritol tetra-(3-mercaptopropionate), and the optical element is a diffractive optical element.