Multi-Channel Compact Optical Zoom Module by using Microlenses
Date Issued
2015
Date
2015
Author(s)
Liao, Wei-Hsiang
Abstract
In this thesis, 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 consisted of curved micolens array. Based on this architecture, we can get the same effect like lens group. Each partial image passes through each channel separately and stitches 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 about 1.9x. The size of image sensor is 1/3” inch which is the scale of current mobile phones. By using wafer-level micro-optical fabrication, the microlense has the potential to applied to mobile phone camera.
Subjects
microlenses array
optical zoom
compound eye
mobile phone camera
Type
thesis
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