Fabricating low cost and high performance elastomer lenses using hanging droplets
Fabricating low cost and high performance elastomer lenses using hanging droplets
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DOI：
10.1364/boe.5.001626
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发表时间：
2014-05-01
影响因子：
3.4
通讯作者：
Phan, Tri Giang
中科院分区：
文献类型：
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作者：
Lee, W. M.;Upadhya, A.;Phan, Tri Giang
使用平行模具冲压和高温回流的低成本透镜的现有方法需要复杂的工程控制来生产高质量透镜。这些制造技术依赖于昂贵的设备。在本文中，我们提出了一种低成本（<0.01美元每pc）的灵活的无模透镜制造方法的基础上固化的悬挂透明聚二甲基硅氧烷（PDMS）弹性体液滴在弯曲的基板。以相同的方式额外沉积的悬滴导致了透镜曲率的大幅增加，并伴随着PDMS透镜的焦距下降到类似于2 mm。最短焦距透镜被示出为准直光从裸发光二极管（LED）和图像显微结构下降到约4 μ m，160倍放大。我们的悬滴透镜制造技术预示着为大众制造低成本、高性能光学透镜的新范例。使用这些镜头，我们能够将普通的商业智能手机相机转换为低成本的数字皮肤镜（放大60倍），可以轻松地观察皮肤上的微观结构，如毛孔。(C)2014年美国光学学会
Existing methods for low cost lenses using parallel mold stamping and high temperature reflow requires complex engineering controls to produce high quality lenses. These manufacturing techniques rely on expensive equipment. In this paper, we propose a low cost (< $ 0.01 per pc) flexible moldless lens fabrication method based on curing a hanging transparent polydimethylsiloxane (PDMS) elastomer droplet on a curved substrate. Additional deposition of hanging droplets in the same manner led to a substantial increase in the lens curvature and concomitant decrease in the focal length of the PDMS lenses down to similar to 2 mm. The shortest focal length lenses were shown to collimate light from a bare light emitting diode (LED) and image microscopic structures down to around 4 mu m with 160x magnification. Our hanging droplet lens fabrication technique heralds a new paradigm in the manufacture of low cost, high performance optical lenses for the masses. Using these lenses, we were able to transform an ordinary commercial smartphone camera into a low-cost digital dermascope (60x magnification) that can readily visualize microscopic structures on skin such as sweat pores. (C) 2014 Optical Society of America