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    • 4. 发明授权
    • Gradient-index polymer rods and fibers
    • 梯度折射率聚合物棒和纤维
    • US5935491A
    • 1999-08-10
    • US929382
    • 1997-09-15
    • Sukant TripathyKethinni G. ChittibabuJayant Kumar
    • Sukant TripathyKethinni G. ChittibabuJayant Kumar
    • B29C47/00B29C71/00B29D11/00G02B1/04G02B6/028
    • G02B6/02038B29C71/0009B29D11/00682B29D11/00721G02B1/046B29C2071/0027B29C2071/0054B29C47/00B29C47/0014
    • The invention features a method of making a gradient-index polymer rod involving the steps of: combining a polymer with an additive, wherein the refractive index of the polymer material is different than the refractive index of the additive material; extruding the polymer and the additive into a polymer rod having a substantially uniform index of refraction profile; and immersing the rod having the substantially uniform index of refraction profile in a non-solvent under conditions and for a time that enables the non-solvent to permeate the rod and out-diffuse a portion of the additive material, thereby producing the gradient-index polymer rod. The rod produced by the method can be drawn into a graded index polymer fiber. The invention also features a gradient-index polymer rod (or fiber) of condensation-type polymer that is doped with an additive material. The refractive index of the additive material is different than the refractive index of the polymer and the rod (or fiber) has a concentration profile of the additive that varies along the radial direction of the rod (or fiber) from the center to the surface of the rod (or fiber).
    • 本发明的特征在于一种制备梯度折射率聚合物棒的方法,包括以下步骤:将聚合物与添加剂结合,其中聚合物材料的折射率不同于添加剂材料的折射率; 将聚合物和添加剂挤出成具有基本均匀的折射率分布的聚合物棒; 并且将条件下的基本上均匀的折射率分布的棒浸渍在非溶剂中,使得非溶剂渗透到棒中并使一部分添加剂材料扩散,从而产生梯度指数 聚合物棒。 通过该方法制备的棒可以被拉伸成渐变折射率聚合物纤维。 本发明还具有掺杂有添加剂材料的缩合型聚合物的梯度折射率聚合物棒(或纤维)。 添加剂材料的折射率不同于聚合物的折射率,并且棒(或纤维)具有沿棒(或纤维)的径向方向从中心到表面变化的添加剂的浓度分布 杆(或纤维)。