Title:
ZOOM LENS AND IMAGE CAPTURING DEVICE
Document Type and Number:
Japanese Patent JP2022123454
Kind Code:
A
Abstract:
To provide a zoom lens which is advantageous in terms of compactness, a large aperture diameter, and high optical performance.SOLUTION: A zoom lens is comprised of: a most object-side lens group having positive refractive power; an intermediate group including at least three lens groups and an aperture stop; and a most image-side lens group having positive refractive power and configured to zoom in and out by changing distance between adjacent lens groups, the groups being arranged in order from the object side to the image side. When zooming, the most object-side lens group is stationary while the at least three lens groups and the aperture stop move. The most image-side lens group includes a first positive lens. The zoom lens satisfies conditions expressed as: 0.65≤θgFp1+0.0011×νp1≤0.70, 0.10≤fp1/fm≤0.58, where νp1 represents an Abbe number based on the d-ray of the first positive lens, θgF1p represents a partial dispersion ratio of the first positive lens relevant to the g-ray and F-ray, fp1 represents a focal length of the first positive lens, and fm represents a focal length of the most image-side lens group.SELECTED DRAWING: Figure 1
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Inventors:
YUKI AKIHIKO
SHIMOMURA KAZUYA
SHIMOMURA KAZUYA
Application Number:
JP2021020780A
Publication Date:
August 24, 2022
Filing Date:
February 12, 2021
Export Citation:
Assignee:
CANON KK
International Classes:
G02B15/20
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsuya Mizumoto
Tomoya Hirayama
Atsuya Mizumoto
Tomoya Hirayama
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