公开(公告)号：US20110044673A1

公开(公告)日：2011-02-24

申请号：US12860369

申请日：2010-08-20

申请人： Daiki Kawamura ,  Kenichi Sato

发明人： Daiki Kawamura ,  Kenichi Sato

IPC分类号： G02B15/14 ,  G03B17/00

CPC分类号： G02B15/177 ,  G03B17/00 ,  H04N5/2254

摘要： Provided is a photographic lens which prevents lenses disposed in the front and the rear of a prism from physically interfering with each other and in which the optical axes of the prism and the lenses disposed in the front and the rear of the prism are precisely aligned with each other. A photographic lens is a zoom lens that deflects the optical path of a prism and performs zooming by moving a second lens group and a third lens group disposed in the rear of the prism. A notch having a circular shape is formed on the prism side of a negative lens adjacent to the prism along the outer periphery of the lens. During zooming, when the second lens group is moved to the position close to the prism, the edge of the second lens group is fitted into the notch.

摘要翻译： 本发明提供一种摄影镜头，其防止棱镜前后的镜片物理上相互干扰，棱镜的光轴和配置在棱镜前后的镜片精确对准 彼此。 摄影镜头是通过移动设置在棱镜后部的第二透镜组和第三透镜组来使棱镜的光路偏转并进行变焦的变焦透镜。 具有圆形形状的凹口沿着透镜的外周形成在与棱镜相邻的负透镜的棱镜侧上。 在变焦期间，当第二透镜组移动到靠近棱镜的位置时，第二透镜组的边缘装配到凹口中。

公开(公告)号：US08630045B2

公开(公告)日：2014-01-14

申请号：US13161095

申请日：2011-06-15

申请人： Daiki Kawamura

发明人： Daiki Kawamura

IPC分类号： G02B15/14

CPC分类号： G02B15/173

摘要： A zoom lens includes a positive first-lens-group, which is fixed during zooming, a negative second-lens-group, which is moved during zooming, a positive third-lens-group, which is fixed during zooming, and a positive fourth-lens-group, which is moved during zooming, these lens groups being arranged in this order from the object side. The first-lens-group consists of four lenses of a negative first-group first lens, a positive first-group second lens, a positive first-group third lens, and a positive first-group fourth lens, arranged in this order from the object side. The first-group first lens and the first-group second lens are arranged in such a manner that a space is formed therebetween. Further, the following formula (1) is satisfied: −2.0

摘要翻译： 变焦透镜包括在变焦期间固定的正的第一透镜组，在变焦期间移动的负第二透镜组，在变焦期间固定的正的第三透镜组，以及正的第四透镜组 在变焦期间移动的这些透镜组从物体侧按此顺序排列。 第一透镜组由负第一组第一透镜，正第一组第二透镜，正第一组第三透镜和正第一组第四透镜的四个透镜组成，从该 物体侧。 第一组第一透镜和第一组第二透镜以它们之间形成空间的方式布置。 此外，满足以下公式（1）：-2.0 <（R11r + R11f）/（R11r-R11f）<-0.4（1）其中R11f是第一组的物体侧表面的曲率半径 第一透镜，并且R11r是第一组第一透镜的图像侧表面的曲率半径。

公开(公告)号：US07817349B2

公开(公告)日：2010-10-19

申请号：US12395200

申请日：2009-02-27

申请人： Daiki Kawamura

发明人： Daiki Kawamura

IPC分类号： G02B15/14

CPC分类号： G02B15/17

摘要： A zoom lens is provided and includes: in order from an object side thereof, a first group having a positive refractive power; a second group having a negative refractive power; a stop; a third group having a negative refractive power, the third group including at least two positive lenses and at least two negative lenses; and a fourth group having a positive refractive power. Power variation from a wide angle end to a telephoto end of the zoom lens is performed by moving the second group to an image side along an optical axis thereof, while the first group and the third group are fixed, and correction of an image plane caused by the power variation and focusing is performed by moving the fourth group along the optical axis.

摘要翻译： 提供变焦透镜，包括：从物体侧开始依次具有正屈光力的第一组; 具有负屈光力的第二组; 停下来 具有负屈光力的第三组，所述第三组包括至少两个正透镜和至少两个负透镜; 和具有正屈光力的第四组。 通过将第二组沿其光轴移动到图像侧，同时第一组和第三组被固定，并且导致图像平面的校正来执行从变焦镜头的广角端到远摄端的功率变化 通过功率变化，并且通过沿着光轴移动第四组来执行聚焦。