An imaging system with a large depth of field based on an overlapped micro-lens array

作者：Pang, Kuo; Song, Le; Fang, Fengzhou^*; Zhang, Yue; Zhang, Haoyang

来源：CIRP Annals, 2016, 65(1): 471-474.

DOI：10.1016/j.cirp.2016.04.071

• Machining
• Optical
• Micro lens array

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 pi/4 to 1, which largely increases the utilization of the image sensors.

• 出版日期2016
• 单位天津大学