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    • 1. 发明授权
    • Low chromatic aberration rod lens array, its unit and image scanner employing them
    • 低色差棒透镜阵列,其单元和图像扫描仪采用它们
    • US06449414B1
    • 2002-09-10
    • US09297061
    • 1999-04-29
    • Yasuteru TaharaTeruta IshimaruYoshihiro UozuToshinori Sumi
    • Yasuteru TaharaTeruta IshimaruYoshihiro UozuToshinori Sumi
    • G02B618
    • G02B3/005G02B3/0056G02B3/0087G02B13/0095H04N1/031H04N1/0311H04N1/0312H04N1/0315H04N1/482
    • A color image scanner is constructed by a three primary color LED array (4) for illuminating an original (2) to be read out, a monochromatic image sensor array (3) and a rod lens array (1) disposed between the original (1) and the image sensor array (3). The focusing parameters of the three kinds of refractive index distribution type rod lenses (11, 12, 13) constituting the rod lens array (1) are set so that each of the operating wavelength band and the predetermined wavelength is different among the kinds, the lens length Zo is equal among the kinds, and the conjugate length TC at each predetermined wavelength is substantially equal among all the kinds. Accordingly, when a color image reading operation is carried out by using the rod lens array which is effective in compactness and brightness, the chromatic aberration of the rod lens array can be sufficiently reduced and high-resolution can be implemented at low cost.
    • 彩色图像扫描器由用于照射待读出的原稿(2)的三原色LED阵列(4)构成,单色图像传感器阵列(3)和设置在原稿(1)之间的杆状透镜阵列(1) )和图像传感器阵列(3)。 构成棒状透镜阵列(1)的三种折射率分布型棒状透镜(11,12,13)的聚焦参数被设定为使得各种工作波长带和预定波长各自不同, 这些种类之间的透镜长度Zo相等,各预定波长的共轭长度TC在各种情况下基本相同。 因此,当通过使用有效紧凑度和亮度的棒状透镜阵列执行彩色图像读取操作时,可以充分降低棒状透镜阵列的色差,并且可以以低成本实现高分辨率。
    • 5. 发明授权
    • Lens array, image sensor, information processor and information processing system comprising the image sensor
    • 透镜阵列,图像传感器,包括图像传感器的信息处理器和信息处理系统
    • US06654173B1
    • 2003-11-25
    • US10111534
    • 2002-04-25
    • Yoshihiro UozuNorifumi HirotaToshinori SumiTeruta Ishimaru
    • Yoshihiro UozuNorifumi HirotaToshinori SumiTeruta Ishimaru
    • G02B2710
    • G02B3/0025G02B3/005G02B3/0087
    • An object of this invention is to provide a lens array in which the amount of light reaching the image forming surface is large and the variation in the amount of light is small. In order to achieve this object, the lens array comprises cylindrical graded index lenses of radius r0 wherein the refractive index continuously decreases from the center of the lens toward the periphery, said cylindrical graded index lenses are arranged in one line or plural lines with array pitch 2R, if R is R≧r0≧0.8R and if the refractive index profile of each graded index lens is approximated by n(r)2=n02{1−(g·r)2}, the overlapping degree m defined by m=X0/2R satisfies 1.05≦m≦1.2, wherein, said r is the distance from the optical axis, n(r) is refractive index at the distance r from the optical axis, n0 is the refractive index at the center, g is the refractive index profile constant, X0 is the radius of the field of view (X0=r1 cos(Z0&pgr;/P), r1 is the effective radius of the graded index lens, Z0 is the length of the graded index lenses, and P is the period length of the graded index lenses namely P=2&pgr;/g.
    • 本发明的目的是提供一种透镜阵列,其中到达图像形成表面的光量大并且光量的变化小。 为了实现该目的,透镜阵列包括半径为r0的圆柱形梯度折射率透镜,其中折射率从透镜的中心朝向周边连续地减小,所述圆柱形渐变折射率透镜以阵列间距排列成一行或多行 2R,如果R是R> = r0> = 0.8R,并且如果每个渐变折射率透镜的折射率分布近似为n(r)<2> = n0 {1-(gr)2) 由m = X0 / 2R定义的重叠度m满足1.05 <= m <= 1.2,其中,所述r为距离光轴的距离,n(r)为距离光轴r的折射率,n0为 中心的折射率,g是折射率分布常数,X0是视场的半径(X0 = r1 cos(Z0pi / P),r1是渐变折射率透镜的有效半径,Z0是长度 的等级折射率镜片,P是渐变折射率镜片的周期长度,即P = 2pi / g。
    • 10. 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。