Adaptive elastomer-liquid lens can find a variety of optical applications due to the tunable optical powers without additional lens replacement or displacement. Most current elastomer-liquid lenses use elastomer membrane with a constant thickness. This approach, however, suffers from substantial optical aberration due to the edge clamping effect. In this study, a varied thickness elastomer membrane with customized aspherical profile is designed and developed to encapsulate a plano-convex liquid lens. Such varied thickness membrane is fabricated by double-side replica molding against a deformed elastomer-liquid lens membrane with a constant thickness. Such configuration could alleviate the edge clamping effect. Simulation and experimental results both show that the lens with a varied thickness membrane exhibits improved optical resolutions at both the center and the peripheral regions at the back focal length of 10 mm comparing to the lens with a constant thickness membrane. This study provides an effective solution to suppress the optical aberrations without sacrifice of the optical aperture.
Hanyang Huang, Kang Wei, Qian Wang, and Yi Zhao, "Improved optical resolution for elastomer-liquid lens at high diopter using varied thickness membrane," Proc. SPIE 9705, Microfluidics, BioMEMS, and Medical Microsystems XIV, 970504 (Presented at SPIE BiOS: February 13, 2016; Published: 24 March 2016); https://doi.org/10.1117/12.2211673.
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