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We report design, fabrication and characterization of molded chalcogenide microlens array for Infrared sensing applications. A master of desired microlens array with high sag value is prepared using ultraviolet lithography and thermal reflow method on a positive photoresist (ma–P1275HV). The negative replica of the master is created using polydimethylsiloxane which serves as a mold for micro-molding. Further, chalcogenide solution is prepared in ethanolamine solvent and spin coated on a substrate to get a uniform film; these films are characterized and are found to have the same optical properties as the parent bulk chalcogenide glass. Finally, the microlens array is fabricated by the micro-molding of chalcogenide film. Fabricated chalcogenide microlenses are characterized for geometrical parameters, which are used to estimate the optical parameters.
Awakash Dixit,Radhakant Singh,Amit K. Agarwal,Amitava Ghosh, andPrabhat K. Dwivedi
"Design, fabrication and characterization of solution-based molded chalcogenide optics for infrared application", Proc. SPIE 9949, Polymer Optics and Molded Glass Optics: Design, Fabrication, and Materials 2016, 994903 (27 September 2016); https://doi.org/10.1117/12.2235893
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Awakash Dixit, Radhakant Singh, Amit K. Agarwal, Amitava Ghosh, Prabhat K. Dwivedi, "Design, fabrication and characterization of solution-based molded chalcogenide optics for infrared application," Proc. SPIE 9949, Polymer Optics and Molded Glass Optics: Design, Fabrication, and Materials 2016, 994903 (27 September 2016); https://doi.org/10.1117/12.2235893