Microstructure-bearing articles of high refractive index

Optical: systems and elements – Holographic system or element – Using a hologram as an optical element

Reexamination Certificate

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C359S456000, C359S457000, C359S459000, C359S580000, C359S742000, C428S001100, C428S001600, C428S030000, C428S064400, C428S195100, C428S206000, C522S081000, C522S083000, C522S077000

Reexamination Certificate

active

06844950

ABSTRACT:
Blends of oligomeric urethane multi(meth)acrylate; optionally at least one other monomer selected from the group consisting of acrylic monomers, styrenic monomers and ethylenically unsaturated nitrogen heterocycles, preferably a polyol multi(meth)acrylate; and nanoparticles of an ethylenically unsaturated, preferably (meth)acrylic-functionalized, titanium or zirconium compound can be cured by ultraviolet radiation in contact with a photoinitiator to produce optical resinous articles having high refractive indices, haze ratings of at most 5% and other properties which may be tailored according to the desired use.

REFERENCES:
patent: 4576850 (1986-03-01), Martens
patent: 5175030 (1992-12-01), Lu et al.
patent: 6247986 (2001-06-01), Chiu et al.
patent: 6291070 (2001-09-01), Arpac et al.
patent: 6432526 (2002-08-01), Arney et al.
patent: 6467897 (2002-10-01), Wu et al.
patent: 6599631 (2003-07-01), Kambe et al.
P.W. Oliveira et al, “Fabrication of GRIN-Materials by Photopolymerization of Diffusion-Controlled Organic-Inorganic Nanocomposite Materials”, Materials Research Society Symp. Proc. vol. 435, 1996.

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