公开(公告)号：US11960200B2

公开(公告)日：2024-04-16

申请号：US18328757

申请日：2023-06-04

Applicant: FUJIFILM Corporation

Inventor： Atsushi Kawanago ,  Kazuyoshi Okada ,  Yasunobu Kishine ,  Yuya Hirakawa

IPC: H04N5/335 ,  G02B5/20 ,  G02B27/28 ,  G03B9/04 ,  G03B11/00 ,  H04N23/55 ,  H04N23/71 ,  H04N23/75 ,  H04N25/11

CPC classification number: G03B9/04 ,  G02B5/201 ,  G02B27/288 ,  G03B11/00 ,  H04N23/55 ,  H04N23/71 ,  H04N23/75 ,  H04N25/11

Abstract: A lens device includes an imaging optical system and an optical member. The optical member is disposed near a pupil of the imaging optical system in a state where an optical axis of the optical member coincides with an optical axis of the imaging optical system. The optical member includes a frame that includes a plurality of aperture regions, a plurality of optical filters that are disposed in at least one of the plurality of aperture regions and include two or more optical filters transmitting light having at least some wavelength ranges different from each other, and a plurality of polarizing filters that are disposed in at least one of the plurality of aperture regions and have different polarization directions. The lens barrel has a slit, and the optical member is insertable into and removable from the imaging optical system through the slit.

公开(公告)号：US11092788B2

公开(公告)日：2021-08-17

申请号：US16580645

申请日：2019-09-24

Applicant: FUJIFILM Corporation

Inventor： Kazuyoshi Okada ,  Taro Asami

IPC: G02B15/177 ,  G02B15/173 ,  G02B13/18 ,  G02B9/64 ,  G02B5/00 ,  G02B13/00

Abstract: The imaging lens consists of, in order from an object side, a positive first lens group and a positive second lens group. During focusing, the first lens group does not move and the second lens group moves. First and second lenses from an object side in the first lens group are a negative lens. The second lens group consists of a stop disposed on the most object side, two negative lenses, and three or four positive lenses. A lens on the most object side of the second lens group is a negative lens. A lens on the most image side of the second lens group is a positive lens. Predetermined conditional expressions are satisfied.

公开(公告)号：US11009676B2

公开(公告)日：2021-05-18

申请号：US16566626

申请日：2019-09-10

Applicant: FUJIFILM Corporation

Inventor： Kazuyoshi Okada

IPC: G02B9/00 ,  G02B9/10 ,  G02B13/02 ,  G02B13/18

Abstract: The imaging lens consists of, in order from the object side, a positive first lens group that moves to the object side during focusing from a long distance to a short distance, and a second lens group that does not move during focusing. The first lens group has a first-B sub-lens group. The first-B sub-lens group consists of, in order from the object side, a positive b1 lens, a negative b2 lens concave toward the image side, an aperture stop, a negative b3 lens concave toward the object side, and a positive b4 lens. The second lens group consists of, in order from the object side, a negative lens, a positive lens, and a negative lens. Predetermined conditional expressions are satisfied.

公开(公告)号：US10139588B2

公开(公告)日：2018-11-27

申请号：US15696216

申请日：2017-09-06

Applicant: FUJIFILM Corporation

Inventor： Kazuyoshi Okada ,  Takashi Kunugise ,  Yasunobu Kishine ,  Michio Cho

IPC: G02B7/10 ,  G02B9/64 ,  G02B13/04

Abstract: The imaging lens includes a first lens group fixed during focusing and a positive second lens group moving to an object side during focusing from a long-distance object to a short-distance object, in order from a side closest to the object. The field curvature is adjusted by moving the first lens group or a sub-lens group within the first lens group including a lens closest to the object side, as an adjustment group. A stop fixed during the adjustment of the field curvature is disposed closer to an image side than the adjustment group. Conditional expressions relating to the focal length of the whole system, the focal length of the adjustment group, and the height of a paraxial on-axis light ray in the adjustment group are satisfied.