Samsung Electronics Co., Ltd.

Pyeong-yong Seong

Chul-woo Lee

Dong-Ho Shin

Chong-sam Chung

Yong-hoon Lee

Kun-Ho Cho

Tae-kyoung Kim

Hyun-seob Choi

No-kyong Park

An optical pickup capable of compatibly adopting disks of different formats which are placed in an optical player includes a first optical source for emitting light having a predetermined wavelength, a second optical source for emitting light having a wavelength different from that of light emitted from the first optical source, an objective lens for focusing light emitted from the respective first and second optical sources on a recording medium placed in the optical player, a light path changing unit disposed on a light path between the first and second optical sources and the objective lens for changing the traveling path of incident light, a first optical detector for receiving light emitted from the first optical source and is incident via the recording medium and the light path changing unit, and a second optical detector for receiving light emitted from the second optical source and is incident via the recording medium and the light path changing unit.

Optical pickup having plural optical sources and plural optical detectors

An optical pickup having a beam shaping device for changing an oval-shaped light beam emitted from a light source into a circular light beam, and an astigmatic difference correcting device for correcting the astigmatic difference of the light is provided. The beam shaping device is a cylindrical lens arranged between the light source and a beam splitter, having a convex cross-section, for converging the incident light, e.g., with respect to an X-axial direction. The astigmatic difference correcting device is an astigmatism lens arranged along an optical path between the cylindrical lens and a light path changing device, as a concave lens, for linearly passing light of a certain direction and diverging light of other directions.

Optical pickup to circularize light emitted from a light source

Growing community of inventors

Seoul, South Korea

Pyeong-yong Seong