کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5449864 | 1512538 | 2017 | 7 صفحه PDF | دانلود رایگان |

- The fabrication time can be dramatically reduced to ~30Â s.
- A fast processing route of aspheric polydimethylsiloxane lenses array (APLA) was developed for smartphone microscopy.
- 4 types of APLA were fabricated with focal lengths in the range of 7.03Â mm, and 4.43Â mm.
- An ordinary commercial smartphone camera can be easily transformed to a low-cost, portable digital microscopy (50Ãmagnification).
A fast processing route of aspheric polydimethylsiloxane (PDMS) lenses array (APLA) is proposed via the combined effect of inverted gravitational and heat-assisted forces. The fabrication time can be dramatically reduced to ~30Â 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, inverting, 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 fabricated 4 types of APLA have various focal lengths in the range of 7.03Â mm, 6.00Â mm, 5.33Â mm, and 4.43Â 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 (50Ãmagnification) such that point of care diagnostic can be implemented pervasively.
Journal: Optics Communications - Volume 385, 15 February 2017, Pages 160-166