带主动倾斜补偿功能的混合型光学头三维力矩器  

Mixed three-dimensional torque controller of optical pickup head with active tilt compensation function(Translation)

作　　者：K.T.Lee 诸葛琼 

出　　处：《记录媒体技术》2008年第4期42-46,31,共6页China Mediatech

摘　　要：一、引言从CD发展到HD DVD、BD,光存储的数据容量和读写速度有了迅速的增长。大容量光存储需要减小盘面上的光斑尺寸,要求采用NA更高的物镜和波长更短的激光。然而,高NA物镜和短波长激光的使用会造成光盘倾斜容差的降低、盘片厚度公差的严格化、焦深的减小和球差的增加。这些变化可以通过以下各式表达:In optical disc drives(ODD),a short wavelength laser,a high numerical aperture(NA)objective lens,and high track following performance are required for high data capacity and high data transfer rate.However;in disc drive systems using a short wavelength laser and a high NA objective lens,the deterioration of signal by disc tilt becomes serious.3-axis actuators for active tilt compensation are used to compensate disc tilt.Hybrid-type 3-axis actuator,which has similar mechanical characteristics to conventional 3-axis actuators and simpler in its structure compared with them,is proposed in this paper.In order to optimize the configuration of the hybrid-type actuator,the electromagnetic circuit and moving part are designed by parametric investigations.The performance of the actuator is verified by experiments using proposed actuator.

关 键 词：力矩器 光学头 三维运动 读写速度 补偿功能 循迹 厚度公差 磁回路 数据容量 盘片 

分 类 号：TP333.4[自动化与计算机技术—计算机系统结构]