发明申请
US20110102625A1 Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System
审中-公开
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
- 专利标题： Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System
- 专利标题（中）： 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
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申请号： US12974848申请日： 2010-12-21
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公开(公告)号： US20110102625A1公开(公告)日： 2011-05-05
- 发明人: Shinichi Mihara , Kanato Adachi , Keisuke Ichikawa , Yasunobu Iga , Koji Matsumoto , Kazuaki Murayama , Keigo Matsuo , Hideki Nagata
- 申请人： Shinichi Mihara , Kanato Adachi , Keisuke Ichikawa , Yasunobu Iga , Koji Matsumoto , Kazuaki Murayama , Keigo Matsuo , Hideki Nagata
- 优先权： JP2005-264529 20050913; JP2005-264533 20050913; JP2006-241747 20060906; JP2006-241771 20060906
- 主分类号： H04N5/228
- IPC分类号： H04N5/228 ; G02B9/10 ; G02B15/14
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 positive lens group is disposed at an object side of the aperture stop, the positive lens group has a cemented lens which is formed by cementing a plurality of lenses, 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 is 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 of an area determined by following conditional expressions (2a) and (3a). 1.45
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