Claims
- 1. An optical article comprising a photoactive monomer and an organic photoinitiator having a maximum absorption at a UV wavelength and absorption in the range of 400-490 nm incorporated in a polymer matrix, wherein the organic photoinitiator comprises a phosphine oxide group, wherein the organic photoinitiator is selected from the group consisting of: and combinations thereof.
- 2. The optical article of claim 1, wherein the optical article has a refractive index contrast adjusted sensitivity of greater than 1.14×10−6 Δn/mJ/cm2.
- 3. The optical article of claim 1, wherein the polymer matrix is in-situ formed by a polymerizing reaction of a material comprising component 1 and component 2, said component 1 comprises a NCO-terminated pre-polymer and said component 2 comprises a polyol.
- 4. The optical article of claim 1, wherein the polymer matrix is in-situ formed by a polymerizing reaction of a material comprising component 1 and component 2, said component 1 comprises a NCO-terminated pre-polymer selected from the group consisting of diphenylmethane diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, a derivative of hexamethylene diisocyanate, a methylenebiscyclohexylisocyanate and a derivative of methylenebiscyclohexylisocyanate, and said component 2 comprises a polyol of polypropylene oxide.
- 5. The optical article of claim 1, wherein the photoactive monomer is an acrylate monomer.
- 6. The optical article of claim 1, wherein the optical article comprises a holographic recording medium.
- 7. The optical article of claim 1, wherein the optical article has a writing induced shrinkage of less than 0.25 percent.
- 8. The optical article of claim 1, wherein the photoinitiator is
- 9. The optical article of claim 1, wherein the photoinitiator is
- 10. A method for holographic recording in an optical article comprising exposing the optical article to:blue light and writing a hologram in the optical article, the optical article comprising a photoactive monomer and an organic photoinitiator having a maximum absorption at a UV wavelength and absorption tails in the range of 400-490 nm incorporated in a polymer matrix, wherein the organic photoinitiator comprises a phosphine oxide group, wherein the organic photoinitiator is selected from the group consisting of: and combinations thereof.
- 11. The method of claim 10, wherein the optical article has a refractive index contrast adjusted sensitivity of greater than 1.14×10−6 Δn/mJ/cm2.
- 12. The method of claim 10, wherein the polymer matrix is formed by a polymerizing reaction of a material comprising component 1 and component 2, said component 1 comprises a NCO-terminated pre-polymer and said component 2 comprises a polyol.
- 13. The method of claim 10, wherein the polymer matrix is formed by a polymerizing reaction of a material comprising component 1 and component 2, said component 1 comprises a NCO-terminated pre-polymer selected from the group consisting of diphenylmethane diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, a derivative of hexamethylene diisocyanate, a methylenebiscyclohexylisocyanate and a derivative of methylenebiscyclohexylisocyanate, and said component 2 comprises a polyol of polypropylene oxide.
- 14. The method of claim 10, wherein the photoactive monomer is an acrylate monomer.
- 15. The method of claim 10, wherein the optical article has a writing induced shrinkage of less than 0.25 percent.
- 16. The method of claim 11, wherein the photoinitiator is
- 17. The method of claim 10, wherein the photoinitiator is
- 18. A method for manufacturing an optical article comprising polymerizing a material comprising component 1 and component 2 which are reacted to form a polymer matrix and forming the optical article, the optical article comprises a photoactive monomer and an organic photoinitiator having a maximum absorption at a UV wavelength and absorption tails in the range of 400-490 nm incorporated in the polymer matrix, and the organic photoinitiator comprises a phosphine oxide group, wherein the organic photoinitiator is selected from the group consisting of: and combinations thereof.
- 19. The method of claim 18, wherein the optical article has a refractive index contrast adjusted sensitivity of greater than 1.14×10.6−6 Δn/mJ/cm2.
- 20. The method of claim 18, wherein said component 1 comprises a NCO-terminated pre-polymer and said component 2 comprises a polyol.
- 21. The method of claim 18, wherein said component 1 comprises a NCO-terminated pre-polymer selected from the group consisting of diphenylmethane diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, a derivative of hexamethylene diisocyanate, a methylenebiscyclohexylisocyanate and a derivative of methylenebiscyclohexylisocyanate, and said component 2 comprises a polyol of polypropylene oxide.
- 22. The method of claim 18, wherein the photoactive monomer is an acrylate monomer.
- 23. The method of claim 18, wherein the optical article comprises a holographic recording medium.
- 24. The method of claim 18, wherein the optical article has a writing induced shrinkage of less than 0.25 percent.
- 25. The method of claim 18, wherein the photoinitiator is
- 26. The method of claim 18, wherein the photoinitiator is
- 27. An optical article comprising a matrix obtained by (1) mixing (a) a matrix precursor comprising component 1 and component 2, said component 1 comprising an isocyanate-terminated prepolymer and said component 2 comprising a polyol, (b) an organic photoinitiator selected from the group consisting of bis(2,4,6-trimethylbenzoyl)phenyl phosphine oxide and 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide and combinations thereof, and (c) a photoactive monomer, and (2) curing the mixture to polymerize the matrix precursor and form the matrix.
- 28. A method for manufacturing an optical article comprising (1) mixing (a) a matrix precursor comprising component 1 and component 2, said component 1 comprising an isocyanate-terminated prepolymer and said component 2 comprising a polyol, (b) an organic photoinitiator selected from the group consisting of bis(2,4,6-trimethylbenzoyl)phenyl phosphine oxide and 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide and combinations thereof, and (c) a photoactive monomer, and (2) curing the mixture to polymerize the matrix precursor and form a matrix.
- 29. A method for holographic recording in an optical article comprising exposing the optical article to blue light and writing a hologram in the optical article, the optical article being obtainable by (1) mixing (a) a matrix precursor comprising component 1 and component 2, said component 1 comprising an isocyanate-terminated pre-polymer and said component 2 comprising a polyol, (b) an organic photoinitiator selected from the group consisting of bis(2,4,6-trimethylbenzoyl)phenyl phosphine oxide and 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide and combinations thereof, and (c) a photoactive monomer, and (2) curing the mixture to polymerize the matrix precursor and form a matrix.
RELATED APPLICATION
This application claims priority from U.S. Provisional Application No. 60/315,713, filed Aug. 30, 2001, which is entitled the same as this application.
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Provisional Applications (1)
|
Number |
Date |
Country |
|
60/315713 |
Aug 2001 |
US |