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17 September 2002 Focusing and servo controlling in chromatic multilayer optical storage system
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An experiment for focusing in chromatic multilayer optical storage system is presented in this paper. There laser diodes with different wavelength as respectively light sources are used in this experiment system so that focusing and servo approach are different from that in traditional optical system. Astigmatic approach is applied for defocusing detection while servo controlling and signal processing circuits are redesigned. The model of the actuator suited this chromatic multilayer optical system is established and analyzed. The static and dynamic parameters of actuator are measured. This paper specifies the design and implementation technologies of focusing and servo controlling in the chromatic multilayer experiment optical system. The preliminary result gotten from this experiment system is also given in the paper.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kun Qian, Guosheng Qi, Duanyi Xu, Lei Zhang, Xiaodong Fan, and Peijun Jiang "Focusing and servo controlling in chromatic multilayer optical storage system", Proc. SPIE 4930, Advanced Optical Storage Technology, (17 September 2002);


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