We present a microlens array consisting of multiple liquid-based tunable-focus microlenses
omnidirectionally fabricated on a hemisphere, resulting in large field of view. Polymer bridge
structure is formed between microlenses to reduce the stress and deformation in each lens structure.
Each microlens in the array is formed via a water-oil interface at its lens aperture. Photopatterned
thermo-responsive hydrogel actuators are used to regulate the curvature of the water-oil interface,
thus tuning the focal length, ranging from millimeters to infinity.