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Vol. 164, Issue 2, February 2014, pp. 44-50




Crosstalk of High-precision Optical Pickup Actuator with Optimal Structure Parameters

Qingxi JIA, Zhizheng WU, Yang LI

Department of Precision Mechanical Engineering, Shanghai University, Shanghai, 200072, China

E-mail: jiaqingxi2007@126.com, zhizhengwu@shu.edu.cn


Received: 29 October 2013 /Accepted: 28 November 2013 /Published: 28 February 2014

Digital Sensors and Sensor Sysstems


Abstract: The crosstalk characteristic is a key factor that affects the pickup actuator dynamic property and consequently the accuracy of reading and writing operation in the future ultra-high density optical storage systems. In this paper, the actuator spatial magnetic field distribution model is first established. Then the crosstalk movement phenomenon of the actuator is analyzed and simulated in CST software based on FDTD principle. Moreover, the crosstalk degree in both tracking and focusing directions are defined with respect to the produced crosstalk forces. The relationship between the crosstalk degree and the structure parameters of the actuator such as the height and width of the permanent magnet is analyzed. Taguchi orthogonal method is further used to obtain the optimal structure parameters. It is concluded that the crosstalk can be effectively reduced by an optimal design of the structure parameters, thereby, the dynamic performance of the actuator can be improved.


Keywords: Optical storage, Pickup actuator, Crosstalk degree, Ultra-high density, Structure parameters.


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