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    • 12. 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。
    • 13. 发明申请
    • Novel optically active biaryl phosphorus compound and production process thereof
    • 新型光学活性联芳基磷化合物及其制备方法
    • US20080139822A1
    • 2008-06-12
    • US12000083
    • 2007-12-07
    • Ken TanakaWataru Kuriyama
    • Ken TanakaWataru Kuriyama
    • C07F9/02
    • C07F9/5728C07B53/00C07F9/4021C07F9/5022C07F9/5325C07F9/65517Y02P20/55
    • The invention provides a novel optically active biaryl phosphorus compound that can be produced easily without the step of optical resolution, which is almost indispensable step in a conventional method.A phosphorus compound defined by the following general formula (1): in the formula (1), R1 denotes a hydrogen atom or a hydroxy protective group; R2 denotes a group defined by the following formula (R2-1) or (R2-2); R3, R4, R5, and R6 may be the same or different and independently denote a hydrogen atom, an alkyl group, an alkoxy group, an acyloxy group, a halogen atom, a haloalkyl group, or a dialkylamino group; two among R3, R4, R5, and R6 may form an aromatic ring optionally having a substituent group, and two among R3, R4, R5, and R6 may form a methylene chain optionally having a substituent group or a (poly)methylenedioxy group optionally having a substituent group: in the formula (R2-1) and (R2-2), R7 denotes an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group, or an aryloxy group; R8 and R9 independently denote a hydrogen atom, an alkyl group, or an aryl group; z denotes a divalent group; and a denotes an integer of 0 or 1.
    • 本发明提供了一种新颖的光学活性联芳基磷化合物,其可以容易地制备而无需光学拆分的步骤,这在常规方法中几乎不可缺少的步骤。 由以下通式(1)定义的磷化合物:在式(1)中,R 1表示氢原子或羟基保护基; R 2表示由下式(R 2→2)或(R 2→2)定义的基团。 R 3,R 4,R 5和R 6可以相同或不同,并且独立地表示 氢原子,烷基,烷氧基,酰氧基,卤素原子,卤代烷基或二烷基氨基; R 3,R 4,R 5和R 6中的两个可以形成任选具有 取代基,R 3,R 4,R 5和R 6中的两个可以形成亚甲基 可选地具有取代基的链或可以具有取代基的(聚)亚甲二氧基:在式(R 2-2中)和(R 2-2)中, R 7表示烷基,环烷基,芳基,烷氧基或芳氧基; R 8和R 9独立地表示氢原子,烷基或芳基; z表示二价基团; a表示0或1的整数。
    • 17. 发明授权
    • Rotation detecting apparatus and rotation detecting system
    • 旋转检测装置和旋转检测系统
    • US08525464B2
    • 2013-09-03
    • US12932410
    • 2011-02-24
    • Ken TanakaYasuhiro FukagawaMasaru Touge
    • Ken TanakaYasuhiro FukagawaMasaru Touge
    • H02P3/08H02K11/00
    • H02K11/001G01P3/48H02K11/20H02P7/0094
    • A rotation detecting apparatus for detecting a rotational state of a direct-current motor includes a driving device, a control device, an energization detecting device, an alternating-current component detecting device, and a rotational state detecting device. An impedance between brushes of the motor changes periodically in accordance with rotation of the motor. The alternating-current component detecting device detects change of an alternating-current component of electric current that is supplied to the motor based on an electrical quantity. The change of the alternating-current component is caused by change of the impedance caused in accordance with the rotation. The rotational state detecting device detects at least one of a rotation angle, a rotational direction, and a rotational speed of the motor based on a detection result of the alternating-current component detecting device.
    • 用于检测直流电动机的旋转状态的旋转检测装置包括驱动装置,控制装置,通电检测装置,交流分量检测装置和旋转状态检测装置。 马达的电刷之间的阻抗根据马达的转动而周期性地变化。 交流分量检测装置基于电量检测供给到电动机的电流的交流分量的变化。 交流分量的变化是由根据旋转引起的阻抗的变化引起的。 旋转状态检测装置基于交流分量检测装置的检测结果来检测电动机的旋转角度,旋转方向和转速中的至少一个。