Patent ID: 9060847
Filing Date: 2015-06-23
Classification: A61F,A61L,B29D,G02C

Abstract:
1. An optical device comprising an optical, hydrogel polymeric material with irradiated regions that define refractive structures, wherein the irradiated regions are characterized by a positive change in refractive index and exhibit little or no scattering loss, and the optical, polymeric material comprises a photosensitizer to enhance the photoefficiency of two photon absorption by the polymeric material to form the refractive structures, wherein the photosensitizer permits one to irradiate the regions at a given average laser power using a scan rate that is at least fifty times greater than a scan rate without the photosensitizer in the material, or at a given scan rate that permits one to set an average power of the laser to a value that is at least two times less than an average laser power without the photosensitizer in the material, yet provide a similar positive change in refractive index within the irradiated regions, and wherein the optical, hydrogel polymeric material further includes at least three monomeric components: a first monomeric component is present in an amount of at least 60% by weight, and its homopolymer will have a refractive index of at least 1.50; a second monomeric component is present in an amount from 3% to 20% by weight, and a hydrophilic component present in an amount from 2% to 30% by weight.