Optical Film and Optical Lens Including Same

An optical film comprising:

• a plurality of alternating first and second polymeric layers disposed on a first protective layer, each of the first and second polymeric layers having an average thickness less than about 500 nm, the first protective layer having an average thickness greater than about 750 nm;
• an olefin layer disposed on the first protective layer opposite the plurality of alternating first and second polymeric layers, the olefin layer comprising cyclic olefin copolymer, cyclic olefin polymer, or a blend thereof, the olefin layer comprising an unstructured major surface opposite the first protective layer;
• and
• a bonding layer disposed between, and bonding together, the olefin layer and the first protective layer,
• wherein the optical film is integrally formed and has an average delamination force of greater than about 500 g/in, each layer of the optical film being formed from a thermoplastic polymer having a melt flow index greater than 5 g/10 min and an intrinsic viscosity in range of 0.3 dl/g to 1.2 dl/g when measured in a solvent blend comprising 60 weight percent o-chlorobenzene and 40 weight percent phenol.

An optical film comprising:

• a plurality of alternating first and second polymeric layers disposed on a first protective layer, each of the first and second polymeric layers having an average thickness less than about 500 nm, the first protective layer having an average thickness greater than about 750 nm;
• an olefin layer disposed on the first protective layer opposite the plurality of alternating first and second polymeric layers, the olefin layer comprising cyclic olefin copolymer, cyclic olefin polymer, or a blend thereof, and
• a bonding layer disposed between, and bonding together, the olefin layer and the first protective layer, a composition of the bonding layer being different from compositions of each of the first protective layer and the first and second polymeric layers,
• wherein the optical film is integrally formed and has an average delamination force of greater than about 500 g/in, each layer of the optical film being formed from a thermoplastic polymer having a melt flow index greater than 5 g/10 min and an intrinsic viscosity in range of 0.3 dl/g to 1.2 dl/g when measured in a solvent blend comprising 60 weight percent o-chlorobenzene and 40 weight percent phenol.

A method of making an optical lens, the method comprising:

• providing an integrally formed optical film having an average delamination force of greater than about 500 g/in, each layer of the optical film being formed from a thermoplastic polymer having a melt flow index greater than 5 g/10 min and an intrinsic viscosity in range of 0.3 dl/g to 1.2 dl/g when measured in a solvent blend comprising 60 weight percent o-chlorobenzene and 40 weight percent phenol, the optical film comprising:
• a plurality of alternating first and second polymeric layers disposed on a first protective layer, each of the first and second polymeric layers having an average thickness less than about 500 nm, the first protective layer having an average thickness greater than about 750 nm;
• an olefin layer disposed on the first protective layer opposite the plurality of alternating first and second polymeric layers, the olefin layer comprising cyclic olefin copolymer, cyclic olefin polymer, or a blend thereof, and
• a bonding layer disposed between, and bonding together, the olefin layer and the first protective layer;
• and
• molding a lens substrate onto the optical film such that the lens substrate faces and bonds to the olefin layer, the lens substrate comprising an olefin composition.