Abstract: A lens system including a first lens and a second lens is provided. The first lens has a first outer loop and at least a protrusiondisposed on the first outer loop of the first lens. In addition, the second lens is lodged to the first lens. The second lens has a second outer loop and at least a recess disposed on the second outer loop of the second lens. The first outer loop is leant to the second outer loop, and the protrusion is lodged to the recess. Accordingly, the first lens and the second lens have an excellent alignment precision.

Abstract: An optical lens is described. The optical lens comprises a barrel, a first lens and a second lens. The barrel has a light incident opening, and a receiving space, wherein the receiving space is successive to the light incident opening. Additionally, the first lens is disposed in the receiving space, and the first lens is partially exposed by the light incident opening, wherein the first lens has a first annular conical surface at the outer rim of the first lens. Further, the second lens is disposed in the receiving space, and embedded with the first lens. The second lens has a second annular conical surface on outer rim of the second lens, and the first annular conical surface is embedded with the second annular conical surface. Accordingly, the optical lens has better alignment accuracy and assembly performance.

Abstract: A microelectronic programmable structure and methods of forming and programming the structure are disclosed. The programmable structure generally include an ion conductor and a plurality of electrodes. Electrical properties of the structure may be altered by applying a bias across the electrodes, and thus information may be stored using the structure.