Abstract: Disclosed is a lens holder assembly which includes a silicon substrate, a lens supporter, a glass plate, a diffraction member, and an aspheric lens. A coupling opening is formed through the center of the silicon substrate by wet etching so as to have an inclined wall. The lens supporter is provided in the coupling opening of the silicon substrate. A mount opening, on which an objective is to be mounted, and a through opening, through which light beams pass, are formed through the center of the lens supporter. The glass plate is attached to a lower side of the silicon substrate so as to be penetrated with the light beams and to close the coupling opening, the diffraction member is attached to a lower side of the glass plate, and the aspheric lens is formed on a portion of an upper side of the glass plate which is exposed by the through opening formed through the lens supporter.

Abstract: Disclosed is an optical pickup device having a variable refractive index, comprising a radiating element for radiating light beams; an objective lens for focusing the light beams onto an optical disc; a photodetector for receiving light beams reflected from the optical disc; and a variable refractive index element, connected to an external electrical field, for refracting and transmitting the light beams from the radiating element onto the objective lens.

Abstract: A lens-positioning device of a camera module designed to provide a focusing function or an optical zoom function. In the lens-positioning device, an actuating part includes a ring-shaped piezoelectric actuator and a rotating plate positioned on an upper surface of the piezoelectric actuator. A positioning part is provided with a hollow barrel holder and linearly moved in the direction of the optical axis of the lens upon rotation of the rotating plate. The hollow barrel holder contacts the upper surface of the rotating plate. A hollow housing receives the actuating part and the positioning part and having a guide means to guide the positioning part to be linearly moved in the direction of the optical axis of the lens. The lens-positioning device can have ultra-miniaturized size through the piezoelectric actuator, and a minute focusing can be realized through minute positioning of the lens, allowing high resolution and high sharpness images.

Abstract: A compilation album of one song performed by various artists. The album will allow for greater enjoyment of one particular song which is interpreted by popular singers, groups, and instrumentalists of today.