公开(公告)号：US20070047096A1

公开(公告)日：2007-03-01

申请号：US11467668

申请日：2006-08-28

申请人： Takayuki ITO ,  Jun HIRAKAWA

发明人： Takayuki ITO ,  Jun HIRAKAWA

IPC分类号： G02B15/14

CPC分类号： G02B13/06 ,  G02B15/177

摘要： A fisheye lens system includes a negative first lens group and a positive second lens group, which are defined with respect to a maximum air-distance between lens elements constituting the fisheye lens system. The negative first lens group includes a first negative meniscus lens element having the convex surface facing toward the object, a second negative meniscus lens element having the convex surface facing toward the object, and a negative third lens element. The fisheye lens system satisfies the following conditions: 0.25

摘要翻译： 鱼眼镜头系统包括相对于构成鱼眼镜头系统的镜头元件之间的最大空气距离限定的负第一透镜组和正第二透镜组。 负第一透镜组包括具有朝向物体的凸表面的第一负弯月形透镜元件，具有朝向物体的凸表面的第二负弯月透镜元件和负第三透镜元件。 鱼眼镜头系统满足以下条件：0.25

公开(公告)号：US20100073777A1

公开(公告)日：2010-03-25

申请号：US12558767

申请日：2009-09-14

申请人： Jun HIRAKAWA

发明人： Jun HIRAKAWA

IPC分类号： G02B15/14 ,  G02B9/64

CPC分类号： G02B9/64 ,  G02B13/16

摘要： A photographic lens system includes a positive lens element, a positive lens element, a negative lens element having a concave surface facing toward the image, a diaphragm, a negative lens element having a concave surface facing toward the object, a positive lens element which is cemented to the negative lens element, and two or three positive lens elements, in this order from the object. An intermediate negative lens element, having the weakest negative refractive power out of all of the negative lens elements, is provided between the negative lens element having the concave surface facing toward the image and the negative lens element having the concave surface facing toward the object.

摘要翻译： 摄影透镜系统包括正透镜元件，正透镜元件，具有面向图像的凹面的负透镜元件，光阑，具有朝向物体的凹面的负透镜元件，正透镜元件， 胶合到负透镜元件，以及两个或三个正透镜元件，从该物体的顺序。 在具有面向图像的凹面的负透镜元件和具有面向物体的凹面的负透镜元件之间，设置具有所有负透镜元件中最弱的负折光力的中间负透镜元件。