Abstract
We developed an optimization method for spherical aberration and focus offset for an optical disc drive using an elliptical approximation. This method measures the small number of points that are located at specific positions. Furthermore, it approximates a characteristic distribution to an ellipse and calculates the center of the ellipse as the optimal point. The effectiveness of this method is experimentally confirmed using Blu-ray discs with three types of protective layer of various thicknesses.
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Kishigami, T., Kanatake, Y. & Takeshita, N. Advanced optimization method for spherical aberration and focus offset for optical disc drive. OPT REV 21, 576–577 (2014). https://doi.org/10.1007/s10043-014-0091-0
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DOI: https://doi.org/10.1007/s10043-014-0091-0