Tunable all-silicone multi-chamber achromatic microlens

We present an all-silicone, multi-chamber fluidic microlens system designed for achromatic focal length tunability in a given wavelength range. This micro-optical system is composed of an integrated stack of multiple microlenses, all fabricated by a simple silicone molding technique. Focal-length tuning of the multi-chamber lenses is realized by external pressure actuation, although the design allows integration of the micropump developed separately for this family of tunable fluidic lenses. A focal length tuning range of -40 mm to -5 mm and 5 mm to 40 mm was determined, and measurements of chromatic aberration were shown at two discrete focal lengths, 12 mm and 15 mm.