Abstract
An overlapped micro-lens array containing 222,762 lenslets is proposed and designed to increase the utilization of image sensors in light field imaging systems. The array is made by micro-injection moulding, and the mould is processed by ultra-precision milling to achieve high precision and a low manufacturing cost. To obtain a compact configuration of each image under a micro-lens, a customized square aperture is introduced into the light path. The experiment shows that compared with the conventional design, the overlapped micro-lens array has improved the fill factor from π/4 to 1, which largely increases the utilization of the image sensors.
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