Samsung Electronics Co., Ltd.

Young-pil Park

Jin-Seung Sohn

Myung-bok Lee

Eun-hyoung Cho

Byung-ryul Ryoo

Won-ik Cho

No-Cheol Park

An optical pickup actuator and optical disc drive using the same. The optical pickup actuator includes a blade holding an objective lens and supported on a base by a plurality of suspension wires so that it is elastically movable, a magnetic element positioned on the base, and a coil positioned horizontally on the blade to generate electromagnetic force in a focusing direction and/or a tilting direction through interaction with the magnetic element. The coil is divided into a plurality of subcoils separated vertically from one another.

Optical pickup actuator and optical disk drive using the same and method

A planar lens capable of compensating for chromatic aberration and which is easy to manufacture and enables easy assembling of optical pickups and a method for fabricating the planar lens are provided. The planar lens includes a transparent substrate with a lens cavity in a surface of the transparent substrate, and a lens element formed in the lens cavity with a first refracting surface in contact with the bottom of the lens cavity and a second diffracting surface having a diffraction grating opposite to the first refracting surface.

Planar lens and method for fabricating the same

A hybrid lens with a high numerical aperture is described. The hybrid lens comprises a refractive surface that refracts incident light and a diffractive surface that diffracts light exiting the lens, the diffracting surface designed by a sag satisfying the following Equation:wherein fis a distance from a center peak to a focal point of the hybrid lens, r is a height from a center axis to each peak of the hybrid lens, n is the refractive index of the hybrid lens, &#x3bb; is the wavelength of incident light and m is an integer. The hybrid lens is small and lightweight and capable of removing chromatic aberration.

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Seoul, South Korea

Young-pil Park