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公开(公告)号：US20230112183A1
公开(公告)日：2023-04-13
申请号：US17819184
申请日：2022-08-11
Applicant: FUJIFILM Corporation
Inventor： Masaru YONEZAWA , Shinkichi IKEDA , Takashi KUNUGISE , Masanao KAWANA
Abstract: The zoom lens consists of a first lens group, a front group, a middle group, and a rear group, in order from an object side. The first lens group has a positive refractive power and includes a negative lens and a positive lens, successively in order from a position closest to the object side to an image side. The front group consists of one or more lens groups that move during zooming and has a negative refractive power as a whole throughout an entire zoom range. The middle group includes only one lens group as a lens group. The rear group consists of a plurality of lens groups. An aperture stop is disposed between a lens surface closest to the image side in the front group and a lens surface closest to the object side in the rear group. The zoom lens satisfies predetermined conditional expressions.
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Patent Agency Ranking
公开(公告)号：US20200064601A1
公开(公告)日：2020-02-27
申请号：US16541828
申请日：2019-08-15
Applicant: FUJIFILM Corporation
Inventor： Masaru YONEZAWA , Daiki KOMATSU , Takashi KUNUGISE
IPC: G02B15/14 , G02B15/167
Abstract: The zoom lens consists of, in order from an object side: a positive first lens group that does not move during zooming; a middle group that consists of two or more movable lens groups moving during zooming; and a subsequent group that has a lens group including a stop at a position closest to the object side. The middle group has at least two negative movable lens groups. At least one negative movable lens group in the middle group includes at least one negative LN lens which satisfies predetermined conditional expressions relating to the refractive index, the Abbe number, and the partial dispersion ratio.
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23.发明申请公开(公告)号：US20190180426A1
公开(公告)日：2019-06-13
申请号：US16281109
申请日：2019-02-21
Applicant: FUJIFILM Corporation
Inventor： Takashi KUNUGISE , Yousuke NARUSE , Kenkichi HAYASHI
Abstract: Provided are an image processing device, an image processing system, an image processing method, and an imaging optical system group capable of suppressing an increase in costs and appropriately restoring an image. In the imaging optical system, in a case where a first MTF curve M1 indicating an MTF value in a first azimuth direction with respect to an amount of defocus from a focal position is compared with a second MTF curve M2 indicating an MTF value in a second azimuth direction with respect to the amount of defocus from the focal position, a ratio of a peak value P1 of the first MTF curve M1 to a peak value P2 of the second MTF curve M2 is equal to or greater than 2, and a ratio of a half-value width HW2 of the second MTF curve M2 to a half-value width HW1 of the first MTF curve M1 is equal to or greater than 1.25. The restoration filter is a common filter corresponding to a representative value of transfer functions in a plurality of same type imaging optical systems.
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公开(公告)号：US20190086651A1
公开(公告)日：2019-03-21
申请号：US16130141
申请日：2018-09-13
Applicant: FUJIFILM Corporation
Inventor： Kazuyoshi OKADA , Takashi KUNUGISE
CPC classification number: G02B13/22 , G02B13/0045 , G02B15/14 , G02B27/0025
Abstract: The imaging lens consists of, in order from the object side, a positive first lens group that has a positive refractive power and remains stationary during focusing, and a second lens group that moves toward an image side during focusing from a distant object to a close-range object. The first lens group has, successively in order from a position closest to the image side, a first-b sub-lens group having a positive refractive power, and an aperture stop. The imaging lens satisfies predetermined conditional expressions relating to the first-b sub-lens group, the second lens group, and the like.
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公开(公告)号：US20190014244A1
公开(公告)日：2019-01-10
申请号：US16129913
申请日：2018-09-13
Applicant: FUJIFILM Corporation
Inventor： Yousuke NARUSE , Takashi KUNUGISE , Kenkichi HAYASHI
Abstract: An image processing device, an image processing system, and an image processing method capable of easily correcting image deterioration caused by nonuniform optical characteristics around an optical axis of a lens according to a position in a rotational direction of a lens barrel are provided. An image processing device includes a communication unit (42) that inputs a first image indicating a correction reference position in a rotation direction of a lens barrel (24) and a second image that is a correction target, the first image and the second image being obtained by imaging of the imaging device (10), a rotation position recognition unit (62) that recognizes the correction reference position in the rotational direction on the basis of the first image, a correction information acquisition unit (66) that acquires correction information on the basis of the correction reference position in the rotation direction, and an image correction unit (68) that corrects the second image on the basis of the correction information.
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公开(公告)号：US20180088299A1
公开(公告)日：2018-03-29
申请号：US15696216
申请日：2017-09-06
Applicant: FUJIFILM Corporation
Inventor： Kazuyoshi OKADA , Takashi KUNUGISE , Yasunobu KISHINE , Michio CHO
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.
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