Optical material and method for modifying the refractive index
View Patent ↗An optical device comprising an optical hydrogel with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm. The irradiated regions are characterized by a positive change in refractive index of from 0.01 to 0.06, and exhibit little or no scattering loss. The optical hydrogel is prepared with a hydrophilic monomer.
1. An optical device comprising an optical hydrogel with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm, wherein the irradiated regions are characterized by a positive change in refractive index of from 0.01 to 0.06, and exhibit little or no scattering loss, and the optical hydrogel is prepared with a hydrophilic monomer.
2. The optical device of claim 1 wherein the irradiated region is an area or volume filled structure that is formed by scanning the laser light over the select regions of the optical hydrogel.
3. The optical device of claim 2 wherein the area or volume filled structure is defined by a series of line scans, the line scans having a width from 0.2 μm to 3 μm, and a height from 0.4 μm to 8 μm, wherein the height is measured in a Z-direction parallel to the laser light.
4. The optical device of claim 2 wherein the area or volume filled structure is a vertically stacked structure wherein the irradiated regions are formed separately in different planes in the hydrogel in a Z-direction parallel to the laser light.
5. The optical device of claim 1 wherein the optical hydrogel is prepared from (meth)acrylate monomer selected from the group consisting 2-phenylethyl(meth)acrylate, methyl(meth)acrylate and 3-phenylpropyl(meth)acrylate.
6. The optical device of claim 1 wherein the pulse energy of the laser light is from 0.2 nj to 10 nj.
7. The optical device of claim 1 wherein the laser generates light pulses having a pulse width of 4 fs to 100 fs.
8. The optical device of claim 1 wherein the hydrophilic monomer is selected from the group consisting of N-vinylpyrrolidone, 2-hydroxyethyl methacrylate, N,N-dimethylacrylamide and methacrylic acid.
9. The optical device of claim 1 wherein the optical hydrogel is prepared from a monomeric component present in the hydrogel in an amount of at least 70% by weight, and its homopolymer will have a refractive index of at least 1.50.
10. The optical device of claim 1 wherein the hydrogel is prepared with a crosslinking monomer, and the hydrogel will have a glass transition temperature not greater than 37° C. and an elongation of at least 150%.
11. The optical device of claim 1 selected from an intraocular lens, a corneal inlay, a corneal ring or a keratoprothesis.
12. The optical device of claim 11 is an intraocular lens that has been positioned in the eye of a patient.
13. The optical device of claim 11 is a corneal inlay that has been positioned in the eye of a patient.
14. An optical device comprising an optical polymeric material with select regions that have been irradiated with laser light having a pulse energy from 0.01 nJ to 50 nJ and a wavelength from 600 nm to 900 nm, wherein the irradiated regions are characterized by a positive change in refractive index of 0.01 or more and exhibit little or no scattering loss, and the optical polymeric material is prepared with a hydrophilic monomer.
15. The optical device of claim 14 selected from an intraocular lens, a corneal inlay, a corneal ring or a keratoprothesis.
16. The optical device of claim 14 wherein the hydrophilic monomer is selected from the group consisting of N-vinylpyrrolidone, 2-hydroxyethyl methacrylate, N,N-dimethylacrylamide, methacrylic acid, poly(ethylene glycol monomethacrylate), 1,4-butanediol monovinyl ether, 2-aminoethyl vinyl ether, di(ethylene glycol)monovinyl ether, ethylene glycol butyl vinyl ether, ethylene glycol monovinyl ether, glycidyl vinyl ether, glyceryl vinyl ether, vinyl carbonate, and vinyl carbamate.