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6 December 2001 Possibility of phase-contrast pickup head for two-layered optical disk
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Zernike phase-contrast method is proposed for its application to optical pickup head for the two-layer optical disk. The most attractive feature of this proposed approach is that a very simple architecture can be fabricated for simultaneous readout of both layers with only one objective lens. After giving the basic theoretical analyses of Zernike phase-contrast method, we constructed one feasible system based on this method and discussed the influences caused by the possible phase change of the high order spectrum and the finite aperture. The experimental demonstration of the proposed system is given.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Shuai Zhao, Changhe Zhou, Peng Xi, and Liren Liu "Possibility of phase-contrast pickup head for two-layered optical disk", Proc. SPIE 4470, Photonic Devices and Algorithms for Computing III, (6 December 2001);


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