本實驗研究出一種利用控制不同強度紫外光以製造漸變折射率透鏡
的製程。在反應管中使形成V 型的膠化區域，可阻止單體光聚合成高分子後收縮所形成的空洞；而且，利用高折射率非反應型單體diphenyl sulfide（DS）以及低折射率反應型單體methyl methacrylate（MMA），使用Ciba IRGACURE 184 (1-hydroxy-cyclohexyl-phenyl-ketone) 為光起始劑，使聚合反應進行中，由於光能量分佈，使聚合反應由底部往上端，由外圍往軸心進行，將DS 分散於聚合物中，使之形成漸變折射率塑膠棒。本研究針對高折射率單體比例、起始劑濃度、管徑等因素在柱狀透鏡的光學性質上所造成的影響進行探討，找出在此新製程下預型體的最佳製造條件。本研究中所得最佳製備條件為MMA/DS = 4/1、Ciba IRGACURE 184 = 0.3 wt.%、反應管內徑為0.8 cm，獲得 Dn = 0.036。實驗結果顯示利用傾斜紫外光燈管的紫外光能量控制法可用來製作漸變折射率透鏡，所獲得之透鏡可被應用於影像傳送。

A UV-energy-controlled exposure process for the fabrication of gradient refractive index lenses was developed. A V-shaped gel zone is formed in the reaction tube to prevent the formation of voids in the polymer matrix after
photo-induced polymerization. Diphenyl sulfide (DS) and methyl methacrylate (MMA) were used as the higher and the lower refractive index monomers in the process, respect ively. Ciba IRGACURE 184 (1-hydroxy-cyclohexyl-phenyl-ketone) was used as photo initiator. Due to UV energy distribution, polymerization occurred from bottom to top side and from periphery to the central part leading to the formation of DS distribution inside the gel rod. The effects of diphenyl sulfide ratio, photo initiator
concentration and reaction tube diameter on the optical properties of the fabricated rod lenses were investigated. The optimal conditions of MMA/DS = 4/1 ,Ciba IRGACURE 184 = 0.3 wt.% , 0.8 cm inner diameter reaction tube were evaluated. We have demonstrated a convenient method for the
fabrication of gradient refractive index (GRIN) lenses via an UV-energycontrolled process equipped with a sloped UV lamp. Real image transmission through the prepared GRIN lenses was also obtained.

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