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    • 7. 发明授权
    • Axially asymmetric phosphorus compound and production method thereof
    • 轴向不对称磷化合物及其制备方法
    • US08222433B2
    • 2012-07-17
    • US13041621
    • 2011-03-07
    • Ken TanakaTohru YokozawaTomohiko Hakamata
    • Ken TanakaTohru YokozawaTomohiko Hakamata
    • C07F9/53
    • C07B53/00C07F9/5325C07F9/6561
    • An optically active compound represented by the following formula (5): wherein, in the formula (5), R1 and R2 may be the same or different are an alkyl group optionally having a substituent group selected from the group consisting of an alkoxy group and a halogen atom, a cycloalkyl group optionally having a substituent group selected from the group consisting of an alkoxy group and a halogen atom, an aryl group optionally having a substituent group selected from the group consisting of an alkyl group, an alkoxy group and a halogen atom, an alkoxy group optionally having a substituent group selected from the group consisting of a halogen atom and an aryl group or an aryloxy group optionally having a substituent group selected from the group consisting of an alkyl group, an alkoxy group and a halogen atom; a1 and a2 independently are 0 or 1; and * is axial asymmetry.
    • 由下式(5)表示的光学活性化合物:其中,在式(5)中,R 1和R 2可以相同或不同,为任选具有选自烷氧基和 卤素原子,任选具有选自烷氧基和卤素原子的取代基的环烷基,任选具有选自烷基,烷氧基和卤素中的取代基的芳基 原子,任选具有选自卤素原子和芳基的取代基的烷氧基或任选具有选自烷基,烷氧基和卤素原子的取代基的芳氧基; a1和a2独立地为0或1; 和*是轴向不对称的。
    • 10. 发明授权
    • Zoom lens and imaging apparatus
    • 变焦镜头和成像设备
    • US07411731B2
    • 2008-08-12
    • US11553281
    • 2006-10-26
    • Motoyuki OhtakeTsutomu NaitouTakuya TsutsumiEiji YanoKen TanakaTatsuyuki Takahashi
    • Motoyuki OhtakeTsutomu NaitouTakuya TsutsumiEiji YanoKen TanakaTatsuyuki Takahashi
    • G02B27/64
    • G02B15/173G02B27/646
    • A zoom lens includes a varifocal lens unit including a plurality of movable lens groups, and a prism disposed on an image side of the varifocal lens unit. The prism has an incident plane into which a light flux from the varifocal lens unit enters, and an exit plane from which the light flux is emitted toward an image plane, the exit plane capable of being inclined with respect to an optical axis, the exit plane inclined in accordance with a following conditional expression “α=−f×θ/[Bf(n−1)]”, where α: an angle formed by a normal of the exit plane and the optical axis, f: a focus distance of a whole lens system, θ: a turning angle of a lens system, Bf: a distance from the exit plane of the prism to the image plane along the optical axis, and n: a refraction index of the prism.
    • 变焦透镜包括包括多个可移动透镜组的变焦透镜单元和设置在变焦透镜单元的像侧上的棱镜。 棱镜具有入射平面,来自变焦透镜单元的光束进入入射平面,以及出射平面,光束从该平面朝向像面发射,出射平面能够相对于光轴倾斜,出射面 根据以下条件表达式“α= -fxtheta / [Bf(n-1)]”倾斜的平面,其中α:由出射平面和光轴的法线形成的角度,f: 整个透镜系统,θ:透镜系统的转角,Bf:从棱镜的出射平面到光轴的像面的距离,以及n:棱镜的折射率。