Compatible optical pick-up device

Application Number: 00108382
Application Date: 2000.03.31
Publication Number: 1269579
Publication Date: 2000.10.11
Priority Information: 1999/3/31 KR 11301/99
International: G11B7/12;G11B7/135
Applicant(s) Name: Samsung Electronics Co., Ltd.
Inventor(s) Name: Kim Evn-Koo
Patent Agency Code: 11105
Patent Agent: li xiaoshu
Abstract An optical pickup compatible between a digital video disc read only memory (DVD-ROM) and a compact disc rewritable (CD-RW), which is a member of the CD family media. The compatible optical pickup includes: a first light source for emitting a first light having a predetermined wavelength; a second light source for emitting a second light having a long wavelength relative to the first light; an optical path changing unit for changing the traveling path of an incident light; an objective lens for condensing the first and second lights onto optical discs having different thicknesses, respectively; and a main photodetector for detecting an information signal and error signals from the first and second lights which have been reflected by the optical discs and passed through the optical path changing unit.