Discretely Tunable Optofluidic Compound Microlenses
Optofluidics, which integrates microfluidics and micro-optical components, provides a unique solution for generating, manipulating, and controlling optical signals on a chip-based platform. Among a wealth of optofluidic devices, liquid-filled or droplet microlenses are common components. Dynamical tunability is essential to them. A few methods have been reported for constructing microlenses with adjustable focal lengths, such as liquid crystal microlenses, liquid immersed microlenses, et al. However, they also come with disadvantages, like liquid crystal microlenses may develop aberrations because of non-uniformities in the electric field, and the typical drawback of replacing the liquid onchip is the slow response speed of the device. Along with the wide use of polydimethylsiloxane (PDMS) and softlithography technique in microfluidic chip fabrications, a few tunable microlenses have been realized via injecting liquid into PDMS chambers. The shape of the microlenses can be directly tuned by adjusting the pneumatic pressure connected to microfluidic network. However, the stability and precision of the pressure differential are highly doubtable. Also, microlenses we listed above are all based on a single layer structure with relatively narrow tuning range.
Peng Fei Yanyi Huangt
College of Engineering, and Biodynamic Optical Imaging Center (BIOPIC) Peking University,Beijing 100871,CHINA
国际会议
The 1st International Conference on Optofluidics 2011(第一届国际光流体大会)
西安
英文
18-19
2011-12-11（万方平台首次上网日期，不代表论文的发表时间）