Invention Grant
US07800832B2 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图像形成光学系统的电子摄像装置
- Patent Title: Image forming optical system and electronic image pickup apparatus using image forming optical system
- Patent Title (中): 图像形成光学系统和使用图像形成光学系统的电子摄像装置
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Application No.: US11991920Application Date: 2006-09-11
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Publication No.: US07800832B2Publication Date: 2010-09-21
- Inventor: Shinichi Mihara , Kanato Adachi , Keisuke Ichikawa , Yasunobu Iga , Koji Matsumoto , Kazuaki Murayama , Keigo Matsuo , Hideki Nagata
- Applicant: Shinichi Mihara , Kanato Adachi , Keisuke Ichikawa , Yasunobu Iga , Koji Matsumoto , Kazuaki Murayama , Keigo Matsuo , Hideki Nagata
- Applicant Address: JP Tokyo
- Assignee: Olympus Corporation
- Current Assignee: Olympus Corporation
- Current Assignee Address: JP Tokyo
- Agency: Kenyon & Kenyon LLP
- Priority: JP2005-264601 20050913; JP2005-264605 20050913; JP2006-241446 20060906; JP2006-241488 20060906
- International Application: PCT/JP2006/318447 WO 20060911
- International Announcement: WO2007/032509 WO 20070322
- Main IPC: G02B15/14
- IPC: G02B15/14
Abstract:
An optical system has 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 and has a cemented lens, and in a rectangular coordinate system in which a horizontal axis is Nd and a vertical axis is 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 an area determined by a line when a lower limit value is in a range of expression (1a) and a line when an upper limit value is in a range of the expression (1a), and an area determined by expressions (2a) and (3a): 1.45
Public/Granted literature
- US20090279185A1 Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System Public/Granted day:2009-11-12
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