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18 August 2005 Electrically controllable polarization-assisted superresolution with radial birefringent filter
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Abstract
An electrically controllable radial birefringent pupil filter is proposed in this paper. It consists of two polarizers and an improved electrically controllable optical azimuth rotator which has two λ/4 retarders, one electro-optical element and one radial birefringent crystal. Evolution and distribution of polarization states of this pupil filter is discussed. The most interesting and useful advantage of such a structure is that characteristic of intensity distribution near focus can be obtained merely controlling the applied-voltage for optimal electrical inductive phase difference Γ of the electro-optical element and azimuth angle of radial birefringent crystal. And the Γ zones are given where transverse superresolution and extended focal depth or focal shift can simultaneously be obtained.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jiming Wang, Liren Liu, De'an Liu, Maojin Yun, and Yu Zhou "Electrically controllable polarization-assisted superresolution with radial birefringent filter", Proc. SPIE 5888, Polarization Science and Remote Sensing II, 58881A (18 August 2005); https://doi.org/10.1117/12.612718
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