公开(公告)号：US20070291601A1

公开(公告)日：2007-12-20

申请号：US11685390

申请日：2007-03-13

申请人： Woo-seok CHOI ,  Tae-kyung Kim ,  In-joo Kim

发明人： Woo-seok CHOI ,  Tae-kyung Kim ,  In-joo Kim

IPC分类号： G11B7/00

CPC分类号： G11B7/094 ,  G11B7/13927

摘要： A chromatic aberration correcting method to correct chromatic aberration generated during a conversion from a reproducing mode to a recording mode in an optical recording and reproducing apparatus which uses an optical pickup to form a light spot on an optical information storage medium by focusing light emitted from a light source using an objective lens and to detect light reflected from the optical information storage medium using a photodetector includes applying a focus offset to the objective lens before the conversion from the reproducing mode to the recording mode to reduce defocus caused by chromatic aberration generated according to the change in wavelength generated when an output light power of the light source is changed from a reproducing light power to a recording light power, and correcting the defocus by outputting the recording light power from the light source during the conversion to the recording mode while the focus offset is applied to the objective lens.

摘要翻译： 一种色差校正方法，用于校正在光学记录和再现装置中从再现模式到记录模式的转换期间产生的色差，该光学记录和再现装置使用光学拾取器在光学信息存储介质上形成光点， 使用物镜的光源和使用光检测器检测从光信息存储介质反射的光包括在从再现模式转换到记录模式之前对物镜施加聚焦偏移，以减少由根据 当光源的输出光功率从再现光功率改变为记录光功率时产生的波长变化，以及通过在转换到记录模式期间从光源输出记录光功率来校正散焦，同时 对焦偏移应用于物镜。

公开(公告)号：US20080205249A1

公开(公告)日：2008-08-28

申请号：US12016399

申请日：2008-01-18

申请人： Jae-cheol BAE ,  Tae-kyung KIM ,  Kyong-tae PARK ,  Woo-seok CHOI

发明人： Jae-cheol BAE ,  Tae-kyung KIM ,  Kyong-tae PARK ,  Woo-seok CHOI

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/1275 ,  G11B7/1378 ,  G11B2007/0006

摘要： An optical pickup compatible with different types of optically recorded media and an optical recording and/or reproducing system employing the compatible optical pickup, the compatible optical pickup including: a short wavelength light source emitting a short wavelength light suitable for a high-density information storage medium; a low-density optical system emitting a long wavelength light suitable for a low-density information storage medium; an objective lens focusing lights incident from the long wavelength light source and the low-density optical system onto an information storage medium; a single photodetector (PD) receiving the short and long wavelength lights reflected from the information storage medium to detect a reproduction signal and a focus error signal; a detection lens focusing the short and long wavelength lights reflected from the information storage medium as a light spot having an appropriate size onto the single PD; a first collimating lens positioned on an optical path of a light reflected from the information storage medium, wherein the optical path is positioned between the objective lens and the single PD; and a driving unit adjusting a position of the first collimating lens along an optical axis according to a wavelength of a light moving towards the single PD to reduce an offset of a focus error signal caused by chromatic aberration.

摘要翻译： 一种与不同类型的光学记录介质兼容的光学拾取器以及采用兼容光学拾取器的光学记录和/或再现系统，该兼容光学拾取器包括：短波长光源，发射适用于高密度信息存储的短波长光 中; 发射适用于低密度信息存储介质的长波长光的低密度光学系统; 将从长波长光源和低密度光学系统入射的光聚焦到信息存储介质上的物镜; 接收从信息存储介质反射的短波长和长波长光的单个光电检测器（PD），以检测再现信号和聚焦误差信号; 检测透镜将从信息存储介质反射的短波长和长波长的光聚焦成具有适当尺寸的光点到单个PD上; 位于从所述信息存储介质反射的光的光路上的第一准直透镜，其中所述光路位于所述物镜和所述单个PD之间; 以及驱动单元，其根据朝向单个PD移动的光的波长沿着光轴调整第一准直透镜的位置，以减少由色差引起的聚焦误差信号的偏移。