|Dual-step method to manufacture a polymeric GRIN lens with a high refractive index range
|Tipo di pubblicazione
|Articolo su Rivista peer-reviewed
|Anno di Pubblicazione
|Loffredo, Fausta, Villani Fulvia, De Girolamo Del Mauro Anna, Sico G., and Nenna G.
|Axial concentration, Concentration- gradients, Gelation, Gradient-index lens, High refractive, Hydrogels, Index range, Polymeric solution, Polyvinyl alcohols, Process-based, Refractive index, Simple++, Step method, Thermoplastic polymer
We introduce a new method to obtain gradient index (GRIN) lenses by dual-step process based on interdiffusion of two different polymeric solutions and gelation of the final mixture. The aim of the study was investigated as a simple process to produce a gel characterized by a continuous axial concentration gradient starting from two thermoplastic polymers [poly(vinyl alcohol) and poly(acrylic acid)] having different refractive indexes. We also introduced a laser scanning system that is conveniently implemented to analyze the refractive index variation in the samples. © 2021 Optical Society of America
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