发明授权
US5280464A Optical disk apparatus having a focusing error correcting system 失效
具有聚焦误差校正系统的光盘装置

Optical disk apparatus having a focusing error correcting system
摘要:
An optical system of an optical disk apparatus having plural optical elements characterized in that the optical element having aberration which can counterbalance the wave front aberration of the whole optical system is disposed, or a direction of aberration of each existing optical element is adjusted in order to correct the wave front aberration.
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