| 摘要 |
PROBLEM TO BE SOLVED: To provide a double-layer liquid crystal lens apparatus that has a simple structure, and is capable of achieving a preferable optical focal length modulating function.SOLUTION: The double-layer liquid crystal lens apparatus has two liquid lens structures. A driving voltage of each liquid crystal lens structure is controlled by an active device disposed thereon. When an incident light is passing through the liquid crystal lens structures, the optical path difference of the incident light is compensated by the liquid crystal lens structures, so that the double-layer liquid crystal lens apparatus performs the focusing function well without using a polarizer. Applying a suitable driving voltage on each of the active devices, the double-layer liquid crystal lens apparatus has a function of modulating focal length focusing and diverging the light, like a convex lens or a concave lens. |
