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Improvement of Three-Dimensional Resolution in Optical Data Storage by Combination of Two Annular Binary Phase Filters |
| ZHAO Xiao-Feng;LI Cheng-Fang;RUAN Hao |
| Department of Physics, Wuhan University, Wuhan 430072
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 |
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| Cite this article: |
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ZHAO Xiao-Feng, LI Cheng-Fang, RUAN Hao 2004 Chin. Phys. Lett. 21 1515-1517 |
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Abstract We present an improved confocal readout system to achieve three-dimensional superresolution. This improved system is based on a combination of two different annular binary phase filters, the one designed for increasing the transverse superresolution and the other for achieving axial superresolution. By adjusting the pupil parameters, each pupil can be well designed. The simulation results show that with this improved system, the area of the central lobe of the three-dimensional point spread function of the read optics is greatly reduced. Moreover, the side-lobes are extinguished.
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| Keywords:
42.25.Fx
42.30.Lr
42.79.Ci
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Published: 01 August 2004
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| PACS: |
42.25.Fx
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(Diffraction and scattering)
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42.30.Lr
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(Modulation and optical transfer functions)
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42.79.Ci
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(Filters, zone plates, and polarizers)
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Abstract
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