首页>
外国专利>
Optical disc drive which uses a train of pulses to shift the focus of a focusing section
Optical disc drive which uses a train of pulses to shift the focus of a focusing section
展开▼
机译:光盘驱动器,它使用一系列脉冲来移动聚焦部分的焦点
展开▼
页面导航
摘要
著录项
相似文献
摘要
An optical disc drive includes: a light source; a focusing section; a focus shifting section for shifting the focal point of light by changing the position of the focusing section perpendicularly to a data storage layer of a given optical disc in accordance with a control signal; a light receiving section for receiving, at multiple areas, the light reflected from the data storage layer and generating light quantity signals; a signal generating section for generating a focus error signal based on the light quantity signals; and a control section for generating the control signal responsive to the focus error signal such that the focal point is transferred to a focus controllable range. The control section generates the control signal such that the focal point is decelerated at a first acceleration and then at a second acceleration. The absolute value of the second acceleration is smaller than that of the first acceleration.
展开▼