Optical assembly and the method to make the same

An optical assembly, comprising:

• a first optical film comprising a first surface;
• an adhesive disposed on the first surface of the first optical film;
• and
• a second optical film comprising a second surface, wherein the second surface of the second optical film comprises a plurality of microstructures, wherein the plurality of microstructures are bonded to the adhesive;
• wherein the adhesive are made of a first hydrophilic material and a first hydrophobic material, and the plurality of microstructures are made of a second hydrophilic material, wherein the weight ratio of the first hydrophilic material to the first hydrophobic material is 0.25˜1.55 such that the adhesive force between the adhesive and the plurality of microstructures of the second optical film is larger than 100 g/25 mm and the optical gain of the optical assembly is larger than 1.5.

An optical assembly, comprising:

• a first optical film comprising a first surface;
• an adhesive disposed on the first surface of the first optical film;
• and
• a second optical film comprising a second surface, wherein the second surface of the second optical film comprises a plurality of microstructures, wherein the plurality of microstructures are bonded to the adhesive;
• wherein the adhesive are made of a first hydrophilic material and a first hydrophobic material, and the plurality of microstructures are made of a second hydrophobic material, wherein the weight ratio of the first hydrophobic material to the first hydrophilic material is 0.25˜1.55 such that the adhesive force between the adhesive and the plurality of microstructures of the second optical film is larger than 100 g/25 mm and the optical gain of the optical assembly is larger than 1.5.

An optical assembly, comprising:

• a first optical film comprising a first surface;
• an adhesive disposed on the first surface of the first optical film;
• and
• a second optical film comprising a second surface, wherein the second surface of the second optical film comprises a plurality of prisms, wherein the plurality of prisms are bonded to the adhesive;
• wherein the adhesive are made of a first hydrophilic material and a first hydrophobic material, and the plurality of prisms are made of a second hydrophilic material, wherein the weight ratio of the first hydrophilic material to the first hydrophobic material is 0.25˜1.55 such that the adhesive force between the adhesive and the plurality of prisms of the second optical film is larger than 100 g/25 mm and the optical gain of the optical assembly is larger than 1.5.