Invention Grant
- Patent Title: Image forming optical system and electronic image pickup apparatus using the same
- Patent Title (中): 图像形成光学系统和使用其的电子摄像装置
-
Application No.: US13065413Application Date: 2011-03-21
-
Publication No.: US08767312B2Publication Date: 2014-07-01
- Inventor: Kanato Adachi , Takayuki Mimura
- Applicant: Kanato Adachi , Takayuki Mimura
- Applicant Address: JP Tokyo
- Assignee: Olympus Corporation
- Current Assignee: Olympus Corporation
- Current Assignee Address: JP Tokyo
- Agency: Kenyon & Kenyon LLP
- Priority: JP2010-068921 20100324
- Main IPC: G02B15/14
- IPC: G02B15/14 ; G02B13/16 ; H04N5/225
Abstract:
In an image forming optical system which includes in order from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power, a refractive index for a d-line of a positive single lens having the largest refractive power among all lenses in the second lens group, is the smallest of a refractive index of lenses in the second lens group.
Public/Granted literature
- US20110234882A1 Image forming optical system and electronic image pickup apparatus using the same Public/Granted day:2011-09-29
Information query
