3 September 2015 Plenoptic camera based on a liquid crystal microlens array
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A type of liquid crystal microlens array (LCMLA) with tunable focal length by the voltage signals applied between its top and bottom electrodes, is fabricated and then the common optical focusing characteristics are tested. The relationship between the focal length and the applied voltage signals is given. The LCMLA is integrated with an image sensor and further coupled with a main lens so as to construct a plenoptic camera. Several raw images at different voltage signals applied are acquired and contrasted through the LCMLA-based plenoptic camera constructed by us. Our experiments demonstrate that through utilizing a LCMLA in a plenoptic camera, the focused zone of the LCMLA-based plenoptic camera can be shifted effectively only by changing the voltage signals loaded between the electrodes of the LCMLA, which is equivalent to the extension of the depth of field.
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Yu Lei, Yu Lei, Qing Tong, Qing Tong, Xinyu Zhang, Xinyu Zhang, Hongshi Sang, Hongshi Sang, Changsheng Xie, Changsheng Xie, } "Plenoptic camera based on a liquid crystal microlens array", Proc. SPIE 9579, Novel Optical Systems Design and Optimization XVIII, 95790T (3 September 2015); doi: 10.1117/12.2186952; https://doi.org/10.1117/12.2186952

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