Variable focal length microlenses

被引：154

作者：

Commander, LG ^{[1
]}

Day, SE ^{[1
]}

Selviah, DR ^{[1
]}

机构：

[1] UCL, Dept Elect & Elect Engn, London WC1E 7JE, England

来源：

OPTICS COMMUNICATIONS | 2000年 / 177卷 / 1-6期

基金：

英国工程与自然科学研究理事会;

关键词：

microlens; liquid crystal; variable focal length;

D O I：

10.1016/S0030-4018(00)00596-4

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Refractive surface relief microlenses (150 mu m diameter) are immersed in nematic liquid crystal in a cell. Application of a variable voltage across the cell effectively varies the refractive index of the liquid crystal and results in a change of the focal length by the lensmakers formula (E. Hecht, Optics, 2nd edn., Addison-Wesley, Reading, Massachusetts, 1987, p. 138). We describe the cell design and construction and demonstrate a range of focal lengths from + 490 to + 1000 mu m for 2 to 12 V applied. A diverging lens results when the voltage is lower. Theoretical models are developed to account for some of the observed aberrations. (C) 2000 Published by Elsevier Science B.V. All rights reserved.

引用

页码：157 / 170

页数：14

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