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    • 15. 发明授权
    • Eyepiece lens
    • 目镜
    • US5751495A
    • 1998-05-12
    • US692482
    • 1996-08-06
    • Masami Suzuki
    • Masami Suzuki
    • G02B25/00
    • G02B25/001
    • An eyepiece lens has an apparent field of no less than 40.degree., and minimizes eye relief error. The eye relief includes a distance between a lens surface closest to an eye point side in the eyepiece lens and an eye point. The eyepiece lens comprises an assembly of lens groups including, from the eye point, a first lens group G.sub.1 that includes one positive lens component, a second lens group G.sub.2 with positive refracting power that includes a cemented lens having a negative lens component and a positive lens component, a third lens group G.sub.3 with positive refracting power that includes a cemented lens having a positive lens component and a negative lens component, and a fourth lens group G.sub.4 that includes one negative lens component. The assembly of lenses is configured such that 1.4.ltoreq..vertline.R7/R4.vertline., wherein R4 is a radius of curvature of a cemented surface of the negative lens component and the positive lens component of the second lens group G2, and R7 is a radius of curvature of a cemented surface of the positive lens component and the negative lens component of the third lens group G.sub.3.
    • 目镜具有不低于40°的明视野,可以最大限度地减少眼睛的消除误差。 眼睛浮雕包括在目镜中最靠近眼点侧的透镜表面与眼点之间的距离。 目镜透镜包括透镜组的组件,其包括从眼点起包括一个正透镜部件的第一透镜组G1,具有正折射率的第二透镜组G2,其包括具有负透镜组分和正透镜组分的胶合透镜 透镜部件,具有正折射率的第三透镜组G3,其包括具有正透镜成分的胶合透镜和负透镜部件,以及包括一个负透镜部件的第四透镜组G4。 透镜的组件被配置为使得其中R4是负透镜组件的胶合表面的曲率半径和第二透镜组G2的正透镜部件的曲率半径,并且R7是 第三透镜组G3的正透镜部件和负透镜部件的胶合表面的曲率半径。
    • 16. 发明授权
    • Eyepiece lens with wide apparent field of view
    • 具有广阔视野的目镜
    • US5726808A
    • 1998-03-10
    • US707335
    • 1996-09-03
    • Masami Suzuki
    • Masami Suzuki
    • G02B25/00G02B3/02
    • G02B25/001
    • Eyepiece lenses are disclosed that provide a wide apparent field of view (.gtoreq.40.degree.) and that effectively correct optical aberrations even to the periphery of the apparent field of view. The eyepiece lens comprises, in order from the eye side, a first lens group G.sub.1 comprising a positive lens element, a second lens group G.sub.2 having positive refractive power and comprising either a positive lens element cemented to a negative lens element, or a negative lens element cemented to a positive lens element, and a third lens group G.sub.3 having positive or negative refractive power and comprising a positive lens element cemented to a negative lens element. At least one lens surface is aspherical. The eyepiece lens satisfies any of various quantitative expressions.
    • 公开了目镜透镜,其提供宽的视场(> / = 40°),并且有效校正甚至到表观视野的周边的光学像差。 目镜透镜包括从眼睛侧依次包括具有正透镜元件的第一透镜组G1和具有正折光力的第二透镜组G2,并且包括胶合到负透镜元件的正透镜元件或负透镜元件 胶合到正透镜元件的元件和具有正或负屈光力的第三透镜组G3,并且包括胶合到负透镜元件的正透镜元件。 至少一个透镜表面是非球面的。 目镜透镜满足各种定量表达式中的任何一种。