Abstract
This study reports the current progress of the novel thermal-actuated tunable focal-length micro polymer (PDMS) lens. The prototype of solid state only tunable lens demonstrates a typical variation of focal length from 1852 mum to 1083 mum under a 60 mA driving current. Moreover, this study also demonstrates the capability to integrate the tunable polymer lens with other optical components such as the conventional and dual-focus Fresnel lens. The resulted compound (PDMS+Fresnel) lens reduced the focal-length of Fresnel lens from 13500 mum to 5038 mum. Moreover the focal-length of compound lens was further dropped to 3523 mum at 60 mA driving current. A dual-focus compound lens was also realized to reduce its focal-length from 8000 mum/4000 mum to 1343 mum/975 mum. The compound lens has potential to further perform beam shaping and remove aberrations.
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