| 采用可变多分隔模式的新型单光束检测方法 |
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| 引用本文： | Noriaki Nishi,诸葛琼.采用可变多分隔模式的新型单光束检测方法[J].记录媒体技术,2008(1). |
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| 作者姓名： | Noriaki Nishi 诸葛琼 |
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| 摘 要： | 一、引言BD(Blu-ray Disc)是目前主流的高密度蓝光光盘格式,它采用405nm的激光波长和0.85的数值孔径,实现了单层25GB的存储容量。BD家族包括ROM (只读)/R(可录)/RE(可重写)等格式,以及标准容量为50GB的单面双层BD光盘。对于可录系统中的循迹误差信号,传统的三光束差分推挽法(DPP:Differential Push-Pull)已被广泛用于消除物镜位移下
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| 关 键 词： | 分隔 全息元件 光电探测器 聚焦误差信号 杂散光 反射信号 检测方法 模式选择 单光束 推挽法 |
Novel one-beam detection method with changeable multi division patterns |
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| Noriaki Nishi.Novel one-beam detection method with changeable multi division patterns[J].China Mediatech,2008(1). |
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| Authors: | Noriaki Nishi |
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| Abstract: | We developed a new one-beam detection method with changeable multi division patterns,pairing with tangential spot size detection(SSD)method for focusing error detection.The changeable multi division patterns are realized by, the active device,which consists of a non-polarizing HOE for tangential SSD method,liquid crystal(LC)active rotator and two different division patterns of layered polarizing blazed HOEs.The LC active rotator properly acts as the mode selector and an R/RE mode pattern for one-beam push-p... |
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