公开(公告)号：US20210356722A1

公开(公告)日：2021-11-18

申请号：US17306983

申请日：2021-05-04

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kohei KIMURA

IPC: G02B15/14 ,  G02B15/177 ,  G02B15/20

Abstract: A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and three or more lens units. A distance between adjacent lens units varies during zooming. A predetermined condition is satisfied.

公开(公告)号：US20240053593A1

公开(公告)日：2024-02-15

申请号：US18383487

申请日：2023-10-25

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kohei KIMURA

IPC: G02B15/14 ,  G02B15/20 ,  G02B15/177

CPC classification number: G02B15/144515 ,  G02B15/144507 ,  G02B15/20 ,  G02B15/177 ,  G02B15/1465

Abstract: A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and three or more lens units. A distance between adjacent lens units varies during zooming. A predetermined condition is satisfied.

公开(公告)号：US20240019671A1

公开(公告)日：2024-01-18

申请号：US18349554

申请日：2023-07-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Satoshi UMEHARA ,  Kohei KIMURA

IPC: G02B15/14 ,  G02B15/24

CPC classification number: G02B15/1461 ,  G02B15/24

Abstract: An optical system includes, in order from an object side to an image side, first to fourth lens units. A distance changes between adjacent lens units during focusing from infinity to a close distance. The optical system includes an aperture stop disposed on the image side of the second lens unit, a final lens unit, the first lens unit and the final lens unit being fixed relative to the image plane during the focusing, and focus lens units disposed on the object side and the image side of the aperture stop. A focus lens unit closest to the image plane among the focus lens units moves toward the image side during the focusing. The optical system is configured to increase an absolute value of an imaging magnification at a shortest imaging distance to 0.5 times or higher. The final lens unit includes positive and negative lenses. A predetermined condition is satisfied.