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    • 7. 发明授权
    • Distributed graded index type optical transmission plastic article and
method of manufacturing same
    • 分布式折射率型光传输塑料制品及其制造方法
    • US5390274A
    • 1995-02-14
    • US908603
    • 1992-07-30
    • Nobuhiko ToyodaYoshihiko MishinaRyuji MurataYoshihiro UozuMasaaki OdaTeruta Ishimaru
    • Nobuhiko ToyodaYoshihiko MishinaRyuji MurataYoshihiro UozuMasaaki OdaTeruta Ishimaru
    • G02B3/00G02B6/02G02B6/028G02B6/06G02B6/18
    • G02B6/02038G02B6/06Y10S359/90
    • A distributed refractive index type optical transmission plastic article has a circular cross section of a radius r.sub.0 which is in a range of 0.4 to 0.6 mm. A refractive index distribution of the optical transmission article substantially approximates a predetermined ideal refractive index distribution curve at least in a range of 0.25r.sub.0 to 0.70r.sub.0 extending from a center axis toward a peripheral surface of the article. A refractive index n.sub.0 at a central part of the article is in a range of 1.4 to 1.6. The article has a refractive index distribution constant of larger than 0.15 mm.sup.-1 and smaller than 0.3 mm.sup.-1, and a modulation transfer function of at least 55%. This optical transmission article is made from uncured liquid substances each having a viscosity of between 10.sup.3 and 10.sup.8 poises. N (N.gtoreq.2) uncured liquid substances having refractive indexes n of n.sub.1 >n.sub.2 >n.sub.3 . . . n.sub.N when cured are arranged in such a way that the refractive indexes n are successively reduced from a central portion toward a peripheral portion, and concentrically laminated one upon the other to form an uncured strand fiber. The substances between adjacent layers of the fiber are mutually diffused. During the diffusion or thereafter, the uncured strand fiber is cured, thereby completing the production of the optical transmission article.
    • PCT No.PCT / JP89 / 00991 Sec。 371日期1991年5月24日 102(e)日期1991年5月24日PCT提交1989年9月29日PCT公布。 公开号WO91 / 05275 日期:1991年04月18日。分布折射型光传输塑料制品具有半径r0的圆形横截面,其范围为0.4至0.6mm。 光传输物品的折射率分布基本上接近预定的理想折射率分布曲线,该曲线至少在从中心轴向制品的外周表面延伸的0.25r0至0.70r0的范围内。 制品中心部分的折射率n0在1.4至1.6的范围内。 该制品的折射率分布常数大于0.15mm-1且小于0.3mm -1,调制传递函数至少为55%。 该光学透射物品由粘度为103〜108泊的未固化液体物质制成。 N(N> / = 2)折射率n为n1> n2> n3的未固化液体物质。 的。 的。 固化时的nN以折射率n从中心部分朝向周边部分依次减少,并且彼此同心地层叠以形成未固化的纤维束。 纤维相邻层之间的物质相互扩散。 在扩散过程中或此后,未固化的股线纤维被固化,从而完成光学传输制品的生产。