Tunable superresolution in the super high-density optical storage

Maojin Yun; Mei Wang; Weijin Kong

doi:10.1117/12.754997

21 November 2007 Tunable superresolution in the super high-density optical storage

Maojin Yun, Mei Wang, Weijin Kong

Proceedings Volume 6827, Quantum Optics, Optical Data Storage, and Advanced Microlithography; 68271F (2007) https://doi.org/10.1117/12.754997
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

Superresolution plays an important role in the super high-density optical storage systems. With the superresolution technology the storage capacity can be increased by the decrease of the Airy spot. General the optical superresoluiton is realized by inserting the conventional superresolution pupil filters in the optical system. But there lies an obvious limitation in the conventional pupil filters. It is that once the pupil filter is fabricated, the corresponding superresolution characteristics can not be changed. In order to overcome this drawback, a new set of pure phase filters for realizing the tunable transverse superresolution is presented in this paper. The filters, whose significant feature are their ability to tune and simplicity, consist of one half-wave plate between of two quarter-wave plates, and the half-wave plate is made of two zones that can rotate with respect to each other. By rotating any zone of the half-wave plate, the central lobe width of the irradiance point spread function (PSF) in the transverse direction can be tunable reduced.

Citation Download Citation

Maojin Yun, Mei Wang, and Weijin Kong "Tunable superresolution in the super high-density optical storage", Proc. SPIE 6827, Quantum Optics, Optical Data Storage, and Advanced Microlithography, 68271F (21 November 2007); https://doi.org/10.1117/12.754997

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KEYWORDS

Super resolution

Point spread functions

Phase only filters

Tunable filters

Optical storage

Confocal microscopy

Optical filters

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