Title:
LENS SYSTEM, INTERCHANGEABLE LENS UNIT, AND CAMERA SYSTEM
Document Type and Number:
Japanese Patent JP2017122861
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a lens system capable of correcting generation of various aberrations by optical elements present between a surface of the lens system closest to an image and an image plane.SOLUTION: The lens system has a plurality of lens groups each constituted by at least one lens element, and the system includes: a focus lens group that moves along an optical axis with respect to an image plane upon focusing from an infinity focusing state to a proximity object focus state; and an aberration correction lens group that has at least one lens element and moves along the optical axis with respect to the image plane. The aberration correction lens group is fixed with respect to the focus lens group and/or the image plane upon focusing. The lens system satisfies the condition of 0.1<|f/f|<9.5, where frepresents a focal distance of the aberration correction lens group; and frepresents a focal distance of the focus lens group.SELECTED DRAWING: Figure 1
Inventors:
MATSUMURA YOSHIO
Application Number:
JP2016002220A
Publication Date:
July 13, 2017
Filing Date:
January 08, 2016
Export Citation:
Assignee:
PANASONIC IP MAN CORP
International Classes:
G02B13/00; G02B7/02; G02B7/04; G02B13/18; G02B15/167; G02B15/22; G03B17/14
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Attorney, Agent or Firm:
Kenji Kamada
Hiroo Maeda
Hiroo Maeda