The disclosed imaging device may include an optical sensor, a lens positioned to focus light from a scene onto the optical sensor, a matrix of variable-phase optical elements that are dimensioned to introduce at least two different phase delays into a wavefront of the light from the scene, and a housing that couples the matrix of variable-phase optical elements to the optical sensor. The housing may position the matrix at least substantially perpendicular to an optical axis of the optical sensor and may enable the optical sensor to capture at least two different perspectives of the scene per output image. Various other methods, systems, and computer-readable media are also disclosed.