3 September 2015 Multi-channel compact optical zoom module by using microlenses
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In this paper, we propose a multi-channel imaging system, which combines the principles of an insect’s compound eye and optical zoom. We use the distance between two aspherical lenses to achieve zoom effect. In order to shrink the thickness of the system, we use the multi-channel structure which consists of curved micolens array. With this architecture, we can achieve the same effect like lens group. Each partial image passes through each channel separately and is stitched together at the image sensor. In our design, the thickness is 6.57 mm (wide), 6.25 mm (mid), 6.4 mm (tele) and the effective focal length is 2.2 mm( wide), 2.97 mm (mid), 4.04 mm (tele). Zoom ratio is close to 2 times. The size of image sensor is 6 mm in diameter. Due to the advance in microlens fabrication of microlens, this design has the potential to bed used inside mobile phone camera in future.
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Wei-Hsiang Liao, Wei-Hsiang Liao, Guo-Dung J. Su, Guo-Dung J. Su, } "Multi-channel compact optical zoom module by using microlenses", Proc. SPIE 9580, Zoom Lenses V, 95800K (3 September 2015); doi: 10.1117/12.2186954; https://doi.org/10.1117/12.2186954

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