Title:
単焦点レンズおよび撮像装置
Document Type and Number:
Japanese Patent JP6983605
Kind Code:
B2
Abstract:
A fixed focal length lens including, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit and a third lens unit, wherein the first lens unit does not move for focusing, at least the second lens unit moves for focusing, a distance between each pair of adjacent lens units changes for focusing, and the first lens unit includes two negative lenses disposed in succession from the object side, and wherein a focal length of the fixed focal length lens, a focal length of the first lens unit, and a combined focal length of the two negative lenses of the first lens unit are appropriately set.
Inventors:
Akihiko Yuki
Kikuchi Shohei
Kikuchi Shohei
Application Number:
JP2017189812A
Publication Date:
December 17, 2021
Filing Date:
September 29, 2017
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B13/04
Domestic Patent References:
| JP201452413A | ||||
| JP2006201526A | ||||
| JP2017111275A | ||||
| JP2017044887A |
Attorney, Agent or Firm:
Okabe
Takao Ochi
Koji Yoshizawa
Masami Saito
Takao Ochi
Koji Yoshizawa
Masami Saito
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