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15 February 2012 Microscopy using water droplets
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Proceedings Volume 8252, MOEMS and Miniaturized Systems XI; 82520Z (2012)
Event: SPIE MOEMS-MEMS, 2012, San Francisco, California, United States
Water droplets are an attractive medium to realize visible-frequency optical elements. The smoothness of a droplet surface mitigates losses due to light scattering, the shape of a water droplet is reconfigurable by either applying pressure or a potential, water is nearly transparent over the visible frequency range, and water is highly abundant. Here, we explore a simple methodology to dispense and shape water droplets for application as the magnifying element in a microscope using either reflection-mode or transmission-mode illumination. A water droplet is created at the end of a syringe and then coated with a thin layer of silicone oil to mitigate evaporation. By applying mechanical pressure to the water droplet using a metal tip, the shape of the droplet is tuned to yield focusing properties amenable for microscopy. Images captured using the microscope demonstrate micron-scale resolution, variable magnification, and imaging quality comparable to that obtained by a conventional, laboratory-grade microscope.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Faqrul A. Chowdhury and Kenneth J. Chau "Microscopy using water droplets", Proc. SPIE 8252, MOEMS and Miniaturized Systems XI, 82520Z (15 February 2012);

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