The optical signal on microfluidic chip is hard to be collected. To improve the excitation power and collection efficiency,
we introduced a simple, inexpensive fabrication method to increase the couple rate of optical fiber. This small element is
a polymer and air integrated microlens that can improve the optical signal detection. Compared to other established
protocols, this procedure allows a simple, miniaturizing and inexpensive microlens fabrication with high reproducibility.
The air microlens was produced by using direct lithograph of SU-8 resist to reduce the beam divergence of optical fiber.
Owing to its ability to achieve customized microlens for specific applications, this technique can be used in a variety of
applications, such as a blood cell counting system based on microfluidic chip.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yingying Zhao ; Qin Li ; Xiao-Ming Hu and Dong-Fang Yang
"Integrated on-chip lens applied to microfluidic chips", Proc. SPIE 8553, Optics in Health Care and Biomedical Optics V, 855304 (December 11, 2012); doi:10.1117/12.2000689; http://dx.doi.org/10.1117/12.2000689