Optical assembly and the method to make the same
The present invention discloses an optical assembly. The optical assembly comprises: 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 is made of a first material and the plurality of microstructures are made of a second material, wherein the hydrophilic/hydrophobic characteristic of the first material is configured with respect to the hydrophilic/hydrophobic characteristic of the second material 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.
1. 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.
2. The optical assembly according to claim 1 , wherein the thickness of the adhesive is 0.5˜3 μm.
3. The optical assembly according to claim 1 , wherein the weight ratio of the first hydrophilic material to the first hydrophobic material is 0.25˜1.55 to have the difference of the surface tension between the adhesive and the plurality of microstructures of the second optical film larger than 3 dyne/cm 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.
4. The optical assembly according to claim 1 , wherein each of the plurality of microstructures has a light directing portion and a bonding portion bonded to the adhesive, wherein the light directing portion has two intersecting extending-facets defining a first dihedral angle and the bonding portion has two intersecting facets defining a second dihedral angle, wherein the first dihedral angle is substantially equal to the second dihedral angle.
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.
6. The optical assembly according to claim 5 , wherein the thickness of the adhesive is 0.5˜3 μm.
7. The optical assembly according to claim 5 , wherein the weight ratio of the first hydrophobic material to the first hydrophilic material is 0.25˜1.55 to have the difference of the surface tension between the adhesive and the plurality of microstructures of larger than 3 dyne/cm 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.
8. The optical assembly according to claim 5 , wherein each of the plurality of microstructures has a light directing portion and a bonding portion bonded to the adhesive, wherein the light directing portion has two intersecting extending-facets defining a first dihedral angle and the bonding portion has two intersecting facets defining a second dihedral angle, wherein the first dihedral angle is substantially equal to the second dihedral angle.
9. The optical assembly according to claim 5 , wherein each of the plurality of microstructures is a prism.
10. The optical assembly according to claim 5 , wherein the plurality of microstructures penetrate into the adhesive.
11. The optical assembly according to claim 1 , wherein each of the plurality of microstructures has a light directing portion and a bonding portion bonded to the adhesive, wherein the light directing portion has two intersecting extending-planes defining a first dihedral angle and the bonding portion has two intersecting planes defining a second dihedral angle, wherein the second dihedral angle is substantially equal to the first dihedral angle.
12. The optical assembly according to claim 1 , wherein each of the plurality of microstructures has a light directing portion and a bonding portion bonded to the adhesive, wherein the light directing portion has two intersecting extending-planes defining a first dihedral angle and the bonding portion has two intersecting planes defining a second dihedral angle, wherein the second dihedral angle is smaller than the first dihedral angle.
13. The optical assembly according to claim 1 , wherein the plurality of microstructures penetrate into the adhesive.
14. 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.
15. The optical assembly according to claim 14 , wherein the thickness of the adhesive is 0.5˜3 μm.
16. The optical assembly according to claim 14 , wherein the weight ratio of the first hydrophilic material to the first hydrophobic material is 0.25˜1.55 to have the difference of the surface tension between the adhesive and the plurality of prisms of the second optical film larger than 3 dyne/cm 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.
17. The optical assembly according to claim 14 , wherein each of the plurality of prisms has a light directing portion and a bonding portion bonded to the adhesive, wherein the light directing portion has two intersecting extending-planes defining a first dihedral angle and the bonding portion has two intersecting planes defining a second dihedral angle, wherein the first dihedral angle is substantially equal to the second dihedral angle.
18. The optical assembly according to claim 14 , wherein each of the plurality of prisms has a light directing portion and a bonding portion bonded to the adhesive, wherein the light directing portion has two intersecting extending-planes defining a first dihedral angle and the bonding portion has two intersecting planes defining a second dihedral angle, wherein the second dihedral angle is smaller than the first dihedral angle.
19. The optical assembly according to claim 14 , 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 120 g/25 mm and the optical gain of the optical assembly is larger than 1.52.
20. The optical assembly according to claim 14 , wherein the plurality of prisms penetrate into the adhesive.