TY - JOUR
T1 - A fast processing route of aspheric polydimethylsiloxane lenses array (APLA) and optical characterization for smartphone microscopy
AU - Fuh, Yiin Kuen
AU - Lai, Zheng Hong
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017/2/15
Y1 - 2017/2/15
N2 - 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 ~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, 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 7.03 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 (50×magnification) such that point of care diagnostic can be implemented pervasively.
AB - 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 ~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, 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 7.03 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 (50×magnification) such that point of care diagnostic can be implemented pervasively.
KW - Aspheric lens
KW - Aspheric polydimethylsiloxane lens (APL)
KW - Microscope
KW - PDMS
UR - http://www.scopus.com/inward/record.url?scp=84992690872&partnerID=8YFLogxK
U2 - 10.1016/j.optcom.2016.10.029
DO - 10.1016/j.optcom.2016.10.029
M3 - 期刊論文
AN - SCOPUS:84992690872
SN - 0030-4018
VL - 385
SP - 160
EP - 166
JO - Optics Communications
JF - Optics Communications
ER -