利索-全球专利检索

  1. 登录
  2. 注册
发明申请
US20090279185A1 Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System 有权
图像形成光学系统和使用成像光学系统的电子图像拾取装置

Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System
摘要：
An image forming optical system according to the present invention is characterized in that, in an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the negative lens group is disposed at an object side of the aperture stop, the negative lens group has a cemented lens which is formed by cementing a plurality of lenses, and in a rectangular coordinate system in which, a horizontal axis is let to be Nd and a vertical axis is let to be νd, when a straight line indicated by Nd=α×νd+β (where, α=−0.017) is set, Nd and νd of at least one lens forming the cemented lens are included in both of areas namely, an area which is determined by a line when a lower limit value is in a range of a following conditional expression (1a), and a line when an upper limit value is in a range of the following conditional expression (1a), and an area determined by following conditional expressions (2a) and (3a). 1.45
摘要（中）：

根据本发明的图像形成光学系统的特征在于，在具有正透镜组，负透镜组和孔径光阑的图像形成光学系统中，负透镜组设置在孔的物体侧 停止时，负透镜组具有通过胶合多个透镜形成的胶合透镜，并且在垂直坐标系中，其中使水平轴为Nd并且垂直轴为nud， 由Nd = alphaxnud +β（其中，α= -0.017）表示的线被设置，形成胶合透镜的至少一个透镜的Nd和nud包括在两个区域中，即，当较低 限制值在以下条件表达式（1a）的范围内，并且当上限值在以下条件表达式（1a）的范围内时的行，以及由以下条件表达式（2a）和（3a）确定的面积 ）。 1.45 1.30 3这里，Nd表示折射率，nud表示阿贝数。

公开/授权文献
信息查询
Global Dossier Espacenet
0/0