| 从几何光学研究负折射率透镜的有限尺寸效应 |
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| 引用本文： | 杨立功,顾培夫,黄弼勤.从几何光学研究负折射率透镜的有限尺寸效应[J].光子学报,2003,32(11):1396-1398. |
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| 作者姓名： | 杨立功 顾培夫 黄弼勤 |
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| 作者单位： | 浙江大学现代光学仪器国家重点实验室,杭州,310027 |
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| 摘 要： | 从几何光学理论证明了,在左手系材料(负折率材料)透镜中存在完善聚焦的概念。当该透镜的尺寸可以认为是无穷大时,该透镜是无几何像差透镜。进一步考虑了有限透镜孔径对成像面上成像质量的影响,模拟结果表明:成像面上亮度对比度分布不均匀;且随着透镜孔径大小与厚度的比值减小,像的对比度将会增加。
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| 关 键 词： | 左手系物质 负折射率 无像差透镜 几何光学 对比度 |
| 收稿时间： | 2002-12-04 |
Study of Finite Aperture Effect on Lens Made of LHM by Geometrical Optics |
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| Abstract.Study of Finite Aperture Effect on Lens Made of LHM by Geometrical Optics[J].Acta Photonica Sinica,2003,32(11):1396-1398. |
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| Authors: | Abstract |
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| Institution: | State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027 |
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| Abstract: | The perfect focusing concept is proposed in lenses made of Left handed materials (or negative index materials) by means of geometrical optics. The geometrical aberrations of a single lens are eliminated when the lens is considered to be infinite. The finite aperture effect of these lenses on the imaging performance is also analyzed and the numerical simulation shows the contrast of the image distributes non uniformly and it will increase evidently with the ratio of thickness to aperture decreasing. |
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| Keywords: | Left handed materials Negative index Aberration free lens Geometrical optics Contrast ratio |
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