Open AccessTransverse superresolution and axial extended focal depth realized by the tunable phase pupil filter
Author(s) -
Maojin Yun,
Yong Wan,
Kong Wei-Jin,
Mei Wang,
Junhai Liu,
Liang Wei
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.194
Subject(s) - optics , filter (signal processing) , superresolution , phase (matter) , transverse plane , optical filter , waveplate , materials science , physics , computer science , image (mathematics) , laser , structural engineering , quantum mechanics , artificial intelligence , engineering , computer vision
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.