Samsung Electronics Co., Ltd.

Gi-bong Song

Pyong-yong Seong

Byung-in Ma

Yong-jae Lee

Chang-jin Yang

Sung-ro Go

Jong-koog Lee

An optical pickup apparatus includes a first light source to emit a first light beam having a predetermined wavelength, a first optical path changer to change a proceeding path of the first light beam, an objective lens to focus the first light beam on a recording medium, a diffraction member to divide the first light beam reflected by the recording medium into five light regions, the diffraction member having a first diffraction region having a wide width in a direction corresponding to a tangential direction of the recording medium and second through fifth diffraction regions sequentially arranged around the outside of the first diffraction region in a direction corresponding to a radial direction of the recording medium, and a first photodetector having first through fifth light receiving portions to receive the first light beam reflected by the recording medium.

Growing community of inventors

Gyeonggi-do, South Korea

Gi-bong Song