Toshiba Samsung Storage Technology Korea Corporation

Samsung Electronics Co., Ltd.

Seung-man Han

Eun-goo Kim

Ki-bok Kim

Jin-ho Jeong

Pyong-yong Seong

Young-bin Lee

Chul-ho Jeon

Kun-soo Kim

Jong-koog Lee

Sung-du Kwon

Yong-jun Cho

Jung-bae Oh

Ji-sun Ahn

Soo-hyun Baek

Hyun-seob Choi

Chun-gi Kim

Ju-hee Im

Chang-hoon Baek

Seung-hak Lee

Provided are an optical pickup and an optical information storage system including the same. The optical pickup includes a diffracting element that splits incident light into main light and a plurality of sub light. The diffracting element has at least three regions including first through third regions. A second region is disposed between a first region and a third region and has a phase difference from the first and third regions. The optical pickup detects a tracking error signal by using light diffracted by the diffracting element.

Optical pickup and optical information storage system including the same

Provided are an optical pickup and an optical information storage system including the same. The optical pickup includes a photodetector that receives a main light beam and a plurality of sub-light beams reflected from an information storage medium and diffracted by a diffracting element. The photo detector detects a tracking error signal using zeroth-order light as the main light beam and using one of first-order light and third-order light as the sub-light beam based on a type of an optical information storage medium.

Provided is an object lens driving device that includes a wire holder coupled to a support portion and on which an end of a plurality of suspension wires are fixed. The wire holder includes a first area supported on the support portion and a second area extending from the first area and on which the end of each of the plurality of suspension wires is fixed. In this example, a thickness of the second area is thinner than a thickness of the first area.

Object lens driving device and optical disc drive including the same

An optical pickup for a recording medium includes a light source, an objective lens, a main photodetector, and a front photodetector. The configuration of the optical pickup enables converging or diverging of light to be incident on a plate beam splitter so that light can be received at an effective light receiving region of a front photodetector without interference due to internal reflection occurring in the plate beam splitter. In the alternative, a wedge beam splitter in the optical pickup includes first and second mirror planes at a predetermined angle to transmit and reflect incident light at a predetermined ratio. In the optical pickup, an amount of light that is exactly proportional to an output power of the light source can be detected, where the output power of the light source can be accurately controlled, thereby improving a linearity of the output power of the light source.

Optical pickup and a wedge beam splitter

An optical signal converter and a method or controlling an amplification gain according to a rotating speed of an optical disc. An optical signal detector detects an optical signal reflected from an optical disc in a reproduction mode and converts the detected optical signal into an electrical signal. A gain control signal generator generates a gain control signal when a voltage level of a driving signal used to drive the optical disc exceeds a maximum output voltage of the optical signal converter. A gain switcher selects an amplification gain of the optical signal converter in response to the gain control signal and an external control signal. A signal amplifier amplifies a signal output from the optical signal detector in response to an output signal of the gain switcher.

Optical signal converter and method of controlling amplification gain according to rotating speed of optical disc

Growing community of inventors

Suwon-si, South Korea

Seung-man Han