A fast processing route of aspheric polydimethylsiloxane lenses array (APLA) and optical characterization for smartphone microscopy

作者：Fuh Yiin Kuen^*; Lai Zheng Hong

来源：Optics Communications, 2017, 385: 160-166.

DOI：10.1016/j.optcom.2016.10.029

• Aspheric polydimethylsiloxane lens (APL)
• Aspheric lens
• PDMS
• Microscope

A fast processing route of aspheric polydimethylsiloxane (PDMS) lenses array (APLA) is proposed via combined effect of inverted gravitational and heat-assisted forces. The fabrication time can be dramatically reduced to similar to 30 s, compared favorably to the traditional duration of 2 hours of repeated cycles of addition curing processes. In this paper, a low-cost flexible lens can be fabricated by repeatedly depositing, invertin curing a hanging transparent PDMS elastomer droplet on a previously deposited curved structure. Complex structures with aspheric curve features and various focal lengths can be successfully produced and the fabricate 4 types of APLA have various focal lengths in the range of 7.03 mm, 6.00 mm, 5.33 mm, and 4.43 mm respectively. Empirically, a direct relationship between the PDMS volume and focal lengths of the lenses can be experimentally deducted. Using these fabricated APLA, an ordinary commercial smartphone camera can be easily transformed to a low-cost, portable digital microscopy (50xmagnification) such that point of care diagnostic can be implemented pervasively.

• 出版日期2017-2-15
• 单位中央民族大学