Optimization of device parameters for minimizing spherical aberration and astigmatism in liquid crystal microlenses
Optimization of device parameters for minimizing spherical aberration and astigmatism in liquid crystal microlenses
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DOI：
10.1007/s10043-999-0139-8
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发表时间：
1999-03-01
期刊：
影响因子：
1.2
通讯作者：
Sato, S
中科院分区：
文献类型：
--
作者：
Honma, M;Nose, T;Sato, S
通过分析寻常光和非常光干涉产生的条纹图，研究了不同直径、厚度和形状（圆形或椭圆形）的液晶微透镜的像差特性。研究发现，通过调节孔的椭圆度和施加的电压，可以分别减小像散和球差。根据实验结果，我们提出了一种最小化球差和像散的设计方案。实验结果表明，该设计方案得到的液晶微透镜具有良好的聚焦光斑，其半峰全宽接近衍射极限。
The aberration properties of liquid crystal (LC) microlenses with various diameters, thicknesses and shapes (circles or ellipses) are evaluated by analyzing fringe patterns generated by interference between ordinary and extraordinary rays. It is found that the astigmatism and the spherical aberration can be minimized by adjusting the ellipticity of the hole pattern and the applied voltage, respectively. Based on the experimental results, we propose a design scheme for minimizing the spherical aberration and astigmatism. It is confirmed that the LC microlens obtained by the proposed design scheme shows a good focusing spot whose value of full width half maximum is close to that of the diffraction limit.