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    • 6. 发明公开
    • Zoom lens and image pickup apparatus equipped with zoom lens
    • Zoomobjektiv und Bildaufnahmevorrichtung mit dem Zoomobjektiv
    • EP2533091A2
    • 2012-12-12
    • EP12169708.0
    • 2012-05-29
    • Canon Kabushiki Kaisha
    • Tashiro, YoshihisaFujisaki, Toyokatsu
    • G02B15/17G02B15/173
    • G02B13/0065G02B13/009G02B13/12G02B15/17G02B15/173
    • A zoom lens includes, a first lens unit of a positive refractive power, a second lens unit of a negative refractive power, a reflective element, and a rear lens group including two or more lens units and an aperture stop, in which the first lens unit, the second lens unit, and two or more lens units of the rear lens group are moved while the reflective element is stationary during zooming, wherein movement amounts M1 and M2 of the first and second lens units during zooming, a movement amount Ms of the aperture stop, and focal lengths fw and ft of the entire zoom lens at the wide-angle end and the telephoto end, respectively, lateral magnifications β2w and β2t of the second lens unit, a distance LSw from the first lens surface to the aperture stop at the wide-angle end are appropriately set.
    • 变焦透镜包括:正屈光力的第一透镜单元,负折光力的第二透镜单元,反射元件和包括两个或更多个透镜单元和孔径光阑的后透镜组,其中第一透镜 单元,第二透镜单元和后透镜组的两个或更多个透镜单元在变焦期间反射元件静止时移动,其中第一和第二透镜单元在变焦期间的移动量M1和M2,移动量Ms 孔径光阑,以及广角端和远摄端的整个变焦透镜的焦距fw和ft分别为第二透镜单元的横向倍率ν2w和²2t,从第一透镜表面到孔径的距离LSw 在广角端停止适当设定。
    • 7. 发明公开
    • Zoom lens and image pickup apparatus including the same
    • Zoomobjektiv und Bildaufnahmevorrichtung damit
    • EP2506060A1
    • 2012-10-03
    • EP12002247.0
    • 2012-03-27
    • C/o Canon Kabushiki Kaisha
    • Wakazono, TsuyoshiUsui, Fumiaki
    • G02B15/17G02B15/173
    • G02B15/173
    • A zoom lens includes, in order from object side: a positive first lens unit which does not move for zooming; a zoom lens unit including at least two lens units which move for zooming; a stop; and a positive imaging lens unit which does not move for zooming, in which: the first lens unit includes, in order from object side, a positive first sub-lens unit, a negative second sub-lens unit, and a positive third sub-lens unit; the third sub-lens unit includes a movable positive sub-third sub-lens unit; the second sub-lens unit and sub-third sub-lens unit are driven to object side for focusing to a close object; and focal length f12 of the second sub-lens unit, focal length f13f of the sub-third sub-lens unit, drive amount δx12 of the second sub-lens unit in focusing, and drive amount δx13f of the sub-third sub-lens unit in focusing satisfy -2.5
    • 变焦透镜从物体侧起按顺序包括:不移动用于变焦的正的第一透镜单元; 变焦透镜单元,包括至少两个用于变焦的透镜单元; 一个停止 以及对于变焦不移动的正摄像透镜单元,其中:第一透镜单元从物体侧依次包括正的第一子透镜单元,负的第二子透镜单元和正的第三子像素单元, 镜头单元 第三子透镜单元包括可移动的正子第三子透镜单元; 第二子透镜单元和副第三子透镜单元被驱动到物体侧以聚焦到闭合物体; 和第二子透镜单元的焦距f12,副第三子透镜单元的焦距f13f,第二子透镜单元的聚焦驱动量“x12”和第三子透镜单元的驱动量“x13f” 聚焦中的lens单位满足-2.5
    • 9. 发明公开
    • Optical system having image rotating function, and optical apparatus
    • 具有图像旋转功能的光学系统,以及光学设备
    • EP1577694A3
    • 2005-11-09
    • EP05251100.3
    • 2005-02-24
    • CANON KABUSHIKI KAISHA
    • Wakazono, Tsuyoshi c/o Conon Kabushiki Kaisha
    • G02B13/00G02B9/10G03B19/00G02B27/64G02B15/17
    • G02B27/642G02B9/10G02B15/17
    • Provided is an optical system having an image rotating function disposed on an image side with respect to an image pickup lens, which makes it possible that its optical performance is satisfactory, an eclipse amount is small, a field angle and an F number intended by a photographer are obtained, and compactness is achieved. The optical system is an optical system mountable to the image pick up lens. The optical system includes: an image rotator which is disposed on the image side with respect to a first imaging plane of the image pick up lens and has an incident optical axis and an emission optical axis made coaxial to each other; a first lens unit having a negative optical power which is disposed between the image pick up lens and the first imaging plane; a second lens unit having a positive optical power which is disposed between the first imaging plane and the image rotator; and a third lens unit having a positive optical power which is disposed on the image side with respect to the image rotator.
    • 本发明提供一种相对于摄像透镜配置在像侧的图像旋转功能的光学系统,其光学性能良好,日蚀量少,视场角和F数 摄影师获得,并且实现了紧凑。 光学系统是可安装到图像拾取透镜的光学系统。 该光学系统包括:图像旋转器,相对于图像拾取透镜的第一成像平面设置在像侧,并且具有彼此同轴的入射光轴和出射光轴; 具有负光焦度的第一透镜单元,所述第一透镜单元设置在所述图像拾取透镜和所述第一成像平面之间; 具有正光焦度的第二透镜单元,其设置在第一成像平面和图像旋转器之间; 以及具有正光焦度的第三透镜单元,该第三透镜单元相对于图像旋转器设置在像侧。