本論文利用軟性透明基板PDMS對壓克力菲涅耳透鏡進行翻模，並填入液晶組成可撓曲的菲涅耳液晶透鏡。實驗中對透鏡進行撓曲，在不同撓曲角度下量測焦距，液晶向列態時透鏡未撓曲的焦距是3.3公分，隨著撓曲角度漸增，焦距會逐漸變長，當撓曲至45度時，焦距變化至4.3公分。
PDMS折射率與液晶折射率並不匹配，利用調控溫度使液晶排列改變，能使液晶折射率與基板折射率差產生改變，進而影響焦距。透鏡未撓曲且液晶為向列態時3.3公分的焦距經過加溫使液晶轉為澄清態後，焦距縮短為2.4公分，澄清態液晶下的透鏡焦距也會隨著撓曲角度增加而改變，當撓曲至45度時，焦距由2.4公分變化至2.8公分。
實驗最後比較原始壓克力菲涅耳透鏡以及實驗所製作的菲涅耳液晶透鏡在未撓曲情形下對光的聚焦能力比較，壓克力菲涅耳透鏡約能將85%的光匯聚，而菲涅耳液晶透鏡則是將79%的光匯聚，約有6%的光損失。

SUMMARY
In this study, a flexible Fresnel liquid crystal lens based on one duplicated PDMS substrate is investigated and demonstrated, which focuses are thermally controllable and polarization independent. When bending angles in the fabricated liquid crystal lens are individually at 0° and 45°, which focuses are corresponded to 3.3 cm and 4.3 cm. When temperature in the lens is at 40°C, LCs shows isotropic phase to achieve a larger focus of 2.8 cm than 2.4 cm at room temperature due to larger value of refractive index. Finally, we confirmed our lens is polarization independent and its focusing efficiency is about 79%, which is closed to our purchased Fresnel lens 85%.

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