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COMPATIBLE OPTICAL PICKUP CONCERNED WITH PREVENTING AN OBJECTIVE LENSES FROM COLLIDING WITH AN OPTICAL DISK
COMPATIBLE OPTICAL PICKUP CONCERNED WITH PREVENTING AN OBJECTIVE LENSES FROM COLLIDING WITH AN OPTICAL DISK
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机译：防止与光学盘碰撞而产生的目标透镜值得考虑的兼容光学拾取
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摘要
PURPOSE: A compatible optical pickup is provided to compatibly adopt three kinds of recording media by using two objective lenses and three lights having different wavelengths in consideration of a distance difference, thereby preventing the objective lenses from colliding with an optical disk. CONSTITUTION: A single light source(11) emits the first light appropriate for the first recording medium. Twin light sources(21) emit the second and third lights appropriate for the second and third recording media. The first objective lens(45) forms an optical spot for recording and/or reproducing of the first recording medium by focusing the first light. The second objective lens(41) forms an optical spot for recording and/or reproducing of the second and third recording media by focusing the second and third lights. An actuator(40) drives the first and second objective lenses(45,41). The first optical detector(17) receives the first light, and detects an information signal and/or an error signal. The second optical detector(30) receives the second and third lights, and detects an information signal and/or an error signal.
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