| Tunable polarization of high numerical-aperture objective with phase plate |
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| 作者姓名： | LI Jin-song GAO Xiu-min WANG Jian LI Chen-xia |
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| 作者单位： | [1]Institute of Optoelectronics Technology,China Jiliang University, Hangzhou 310018, P.R. China [2]College of Optics and Electronics, University of shanghai for Science and Technology, Shanghai 200093, P.R. China [3]Electronics and Information College, Hangzhou Dianzi University, Hangzhou 310018, P. R. China |
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| 摘 要： | The intensity distribution of depolarized field in the focal region of a high numerical-aperture optical system was investigated and found that the depolarization effect is tunable by the plate. The depolarization effect gains with the increase of the inner convergence angle of the phase plate, goes through a dramatic descent when the angle is larger than 30° and begins to come back when the angle reaches a threshold of respectively 60°and 65° for the orthogonal diffractive field and the longitudinal diffractive fields. This reveals two convergence points where the depolarization effect is the strongest and weakest, respectively, suggesting that the pure phase plate can be a promising method for altering depolarization diffractive fields and constructing optical instruments.
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| 关 键 词： | 相位板 极化作用 焦点 光学仪器 |
| 文章编号： | 1671-8224（2007）02-0125-05 |
| 修稿时间： | 2006-09-032006-11-25 |
Tunable polarization of high numerical-aperture objective with phase plate |
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| LI Jin-song,GAO Xiu-min,WANG Jian,LI Chen-xia.Tunable polarization of high numerical-aperture objective with phase plate[J].Journal of Chongqing University,2007,6(2):125-129. |
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| Authors: | LI Jin-song GAO Xiu-min WANG Jian and LI Chen-xia |
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| Institution: | Institute of Optoelectronics Technology ,China Jiliang University, Hangzhou 310018, P.R. China;College of Optics and Electronics, University of shanghai for Science and Technology, Shanghai 200093, P.R. China;;Electronics and Information College, Hangzhou;Electronics and Information College, Hangzhou;College of Optics and Electronics, University of shanghai for Science and Technology, Shanghai 200093, P.R. China |
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| Abstract: | The intensity distribution of depolarized field in the focal region of a high numerical-aperture optical system was investigated and found that the depolarization effect is tunable by the plate. The depolarization effect gains with the increase of the inner convergence angle of the phase plate, goes through a dramatic descent when the angle is larger than 30°, and begins to come back when the angle reaches a threshold of respectively 60° and 65° for the orthogonal diffractive field and the longitudinal diffractive fields. This reveals two convergence points where the depolarization effect is the strongest and weakest, respectively, suggesting that the pure phase plate can be a promising method for altering depolarization diffractive fields and constructing optical instruments. |
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| Keywords: | depolarization high numerical-aperture objective phase plate phase plate objective high polarization pure promising method constructing optical instruments orthogonal longitudinal diffractive fields come back threshold increase inner convergence |
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