A liquid lens includes a sealed shell, a gaseous material, a transparent carbon nanotube structure within the gaseous material, a liquid material, and a first electrode and a second electrode, a voltage being applied to the carbon nanotube structure causes rapid heating, which is transferred to the gaseous material to change the pressure thereof.
1. A liquid lens comprising: a shell which is sealable, a membrane a gaseous material, a carbon nanotube structure, a first electrode, a second electrode, and a liquid material, wherein the membrane, the gaseous material, the carbon nanotube structure and the liquid material are sealed inside the shell, the gaseous material and the liquid material are separated from each other by the membrane inside the shell, the carbon nanotube structure is intermixed with the gaseous material, and the first electrode and the second electrode are separately located at two opposite sides of the shell, and electrically connected to the carbon nanotube structure.
2. The liquid lens of claim 1 , wherein the gaseous material occupies about 10% to about 50% by volume of an interior of the shell.
3. The liquid lens of claim 1 , wherein the carbon nanotube structure comprises at least one drawn carbon nanotube film.
4. The liquid lens of claim 3 , wherein the at least one drawn carbon nanotube film comprises a plurality of carbon nanotubes aligned along a same direction, and a thickness of the at least one drawn carbon nanotube film is in a range from about 10 nanometers to about 500 nanometers.
5. The liquid lens of claim 3 , wherein the number of the at least one drawn carbon nanotube film is less than 10.
6. The liquid lens of claim 1 , wherein the shell comprises a hard portion and a soft portion.
7. The liquid lens of claim 6 , wherein the hard portion is rigid and comprises glass, quartz, plastic or resin.
8. The liquid lens of claim 6 , wherein the soft portion flexible and comprises polytene, polypropylene, or polymethylmethacrylate.
9. The liquid lens of claim 6 , wherein the soft portion defines a convex surface.
10. The liquid lens of claim 6 , wherein a pressure of the gaseous material sealed inside the shell is in a range from 0.5 atmosphere to 1.5 atmosphere.
11. A liquid lens comprising:
a shell being transparent and rigid, the shell being configured to be sealed;
a gaseous material sealed inside of the shell;
a carbon nanotube structure sealed inside of the shell, wherein the carbon nanotube structure is permeated by the gaseous material;
a first electrode and a second electrode spaced with each other, each of the first and the second electrodes being electrically connected with the carbon nanotube structure;
a membrane configured to be sealed inside of the shell;
a first liquid material sealed inside of the shell, wherein the first liquid material is separated from the gaseous material by the membrane inside the shell; and
a second liquid material sealed inside of the shell, wherein the second liquid material is in contact with the first liquid material, and the first liquid material is located between the gaseous material and the second liquid material, an interface between the first liquid material and the second liquid material is a convex surface.
12. The liquid lens of claim 11 , wherein the gaseous material occupies about 10% to about 50% by volume of an interior of the shell.
13. The liquid lens of claim 11 , wherein a pressure of the gaseous material sealed inside of the shell is in a range from 0.5 atmosphere to 1.5 atmosphere.
14. The liquid lens of claim 11 , wherein the shell is made of glass, quartz, plastic or resin.
15. The liquid lens of claim 11 , wherein a density of the first liquid material is less than the density of the second liquid material.
16. The liquid lens of claim 11 , wherein the carbon nanotube structure comprises at least one drawn carbon nanotube film.
17. The liquid lens of claim 16 , wherein the at least one drawn carbon nanotube film comprises a plurality of carbon nanotubes aligned along a same direction, and a thickness of the at least one drawn carbon nanotube film is in a range from about 10 nanometers to about 500 nanometers.
18. The liquid lens of claim 11 , wherein the first liquid material is oleophylic.
19. The liquid lens of claim 18 , wherein the second liquid material is hydrophilic.
20. The liquid lens of claim 18 , wherein the shell comprises an internal surface which is hydrophilic and lipophobic.