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物理学报  2008 

Transverse superresolution and axial extended focal depth realized by the tunable phase pupil filter
可调谐位相型光瞳滤波器的横向光学超分辨和轴向扩展焦深

Keywords: optical superresolution,phase pupil filter,tunable
光学超分辨,
,位相型光瞳滤波器,,可调谐

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Abstract:

In order to overcome the drawback of the conventional pupil filters and realize the tunable superresolution of the optical system, a new type of tunable pure phase filter composed of a half-wave plate located between two quarter-wave plates is presented in this paper, in which the half-wave plate is made of two zones. The simulation results show that with such a pupil filter the tunable transverse superresolution as well as the axial extended focal depth of the optical system can be realized by rotating any zone of the half-wave plate.

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