Title:
【発明の名称】多重トラックのスキャン可能な互換形光ピックアップ装置
Document Type and Number:
Japanese Patent JP3359271
Kind Code:
B2
Abstract:
An optical pickup capable of multiple track scanning, including a light source (30) having at least two vertical cavity surface emitting lasers (VCSELs) to emit at least two or more light beams and a light controlling device (70) for controlling the focal position of a light formed on one type of recording medium (1) of two formats of different thicknesses, is provided. The light emitted from each VCSEL is focused on adjacent tracks of the recording medium (1) via a polarization beam splitter (40), the light controlling device (70) and an objective lens (80) in sequence, and the light reflected from the recording medium (1) is received by a photodetector (100) via the objective lens (80), the light controlling device (70) and the polarization beam splitter (40). The number of photodetectors correspond to the number of VCSELs to receive lights corresponding to each track.
Inventors:
Park Ji Han
Yuan Zhong Hua
Park Harunari
Yuan Zhong Hua
Park Harunari
Application Number:
JP29600197A
Publication Date:
December 24, 2002
Filing Date:
October 28, 1997
Export Citation:
Assignee:
Samsung Electronics Co.,Ltd.
International Classes:
G11B7/08; G11B7/125; G11B7/127; G11B7/131; G11B7/135; G11B7/1365; G11B7/1369; G11B7/139; G11B7/14; G11B19/12; H01L31/12; G11B7/00; G11B7/13; H01S5/022; H01S5/183; (IPC1-7): G11B7/135; H01L31/12
Domestic Patent References:
| JP620291A | ||||
| JP7326063A | ||||
| JP7302437A |
Attorney, Agent or Firm:
Tadahiko Ito