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OBJECTIVE OPTICAL SYSTEM FOR OPTICAL PICKUP DEVICE, OPTICAL PICKUP DEVICE, DRIVE DEVICE FOR OPTICAL INFORMATION RECORDING MEDIUM, CONDENSING LENS, AND OPTICAL PATH INTEGRATION ELEMENT
OBJECTIVE OPTICAL SYSTEM FOR OPTICAL PICKUP DEVICE, OPTICAL PICKUP DEVICE, DRIVE DEVICE FOR OPTICAL INFORMATION RECORDING MEDIUM, CONDENSING LENS, AND OPTICAL PATH INTEGRATION ELEMENT
PROBLEM TO BE SOLVED: To provide an optical pickup device capable of miniaturization irrespective of being capable of recording and/or reproducing high density information by means of high NA, a drive device for an optical information recording medium, and to provide an objective lens system and a condensing lens therefor.SOLUTION: The system includes a first lens group L1 that has a negative paraxial power P(mm) and is arranged from an object, and a second lens group that has a positive paraxial power P(mm) for condensing a light flux emitted from the first lens group L1 onto an information recording surface of the information recording medium, and an objective lens OBJ satisfies (1) equation: 0.02|P/P|0.30.
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机译：解决的问题：提供一种能够实现小型化而又不依赖于能够通过高NA记录和/或再现高密度信息的光学拾取器，一种光学信息记录介质的驱动装置，以及一种物镜系统。解决方案：该系统包括：第一透镜组L1，其具有负近轴屈光力P（mm），并从物体开始布置;以及第二透镜组，其具有正近轴屈光力P（mm），用于进行聚光。从第一透镜组L1发射到信息记录介质的信息记录表面上的光束和物镜OBJ满足（1）公式：0.02 <| P / P | <0.30。
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