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    • 1. 发明授权
    • Optical imaging system
    • 光学成像系统
    • US6031668A
    • 2000-02-29
    • US212076
    • 1998-12-15
    • Minoru ToyamaShigeo KittakaAtsushi Akiba
    • Minoru ToyamaShigeo KittakaAtsushi Akiba
    • G02B3/00G02B13/00G02B6/02
    • G02B3/0087G02B13/0095G02B3/005G02B3/0056
    • An optical imaging system includes a rod lens array, whose individual lenses have a refractive index distribution optimized for high resolving power, which can be expressed byn(r).sup.2 =n.sub.0.sup.2 .multidot.{1-(g.multidot.r).sup.2 +h.sub.4 .multidot.(g.multidot.r).sup.4 +h.sub.6 .multidot.(g.multidot.r).sup.6 }(Eq. 93)wherein r is a radial distance from an optical axis of said rod lenses, n.sub.0 is the refractive index at the optical axis of said rod lenses, and g, h.sub.4 and h.sub.6 are coefficients of the refractive index distribution. The refractive index distribution coefficients h.sub.4 and h.sub.6 are defined, using parameters a, b, c, and d, asc-d.ltoreq.h.sub.4 .ltoreq.c+d (Eq. 94){(h.sub.4 -c)/d}.sup.2 +[{h.sub.6 -(a.multidot.h.sub.4 +b)}/e].sup.2 .ltoreq.1. (Eq. 95)
    • 光学成像系统包括棒状透镜阵列,其单独的透镜具有针对高分辨率优化的折射率分布,其可以由n(r)2 = n02x {1-(gxr)2 + h4x(gxr)4 + h6x (gxr)6}(式93)其中r是从所述棒状透镜的光轴的径向距离,n0是所述棒状透镜的光轴处的折射率,g,h4和h6是折射率的系数 指数分布。 使用参数a,b,c和d,定义折射率分布系数h4和h6,(d),(d4) + [{h6-(axh4 + b)} / e] 2 <= 1(式95)