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公开(公告)号：US12072478B2
公开(公告)日：2024-08-27
申请号：US17820846
申请日：2022-08-18
发明人： Takumi Suzuki
CPC分类号： G02B15/145105 , G02B15/145103 , G02B15/145113 , G02B15/145121 , G02B15/145511 , G02B15/1461 , G02B15/22
摘要： In an optical system according to each exemplary embodiment, an interval between adjacent lens units changes in focusing from an infinite-distance object to a close-distance object, and a first in-focus state in which β=−1.2 is obtained can be caused, where β is a lateral magnification of an entire system. The optical system according to each exemplary embodiment includes a plurality of focus lens units, and out of a focus lens unit having a largest absolute value of a focus sensitivity and a focus lens unit having a second largest absolute value of a focus sensitivity in a state in which focus is put on an infinite-distance object, a focus lens unit disposed on an object side is a lens unit LA, and a focus lens unit disposed on an image side is a lens unit LB. A partial optical system LC including all lenses disposed on the image side of the lens unit LB has negative refractive power. The partial optical system LC satisfies a predetermined conditional expression.
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公开(公告)号：US11994746B2
公开(公告)日：2024-05-28
申请号：US17526082
申请日：2021-11-15
申请人： Nikon Corporation
发明人： Keiichi Nakamura
CPC分类号： G02B9/60 , G02B13/02 , G02B13/06 , G02B15/145121
摘要： A zoom lens comprises, in order from an object: a first lens group (G1) having positive refractive power; a second lens group (G2) having negative refractive power; a third lens group (G3) having positive refractive power; a fourth lens group (G4) having negative refractive power; and a fifth lens group (G5) having positive refractive power, in which the first to the fifth lens groups (G1 to G5) each move in an optical axis direction upon zooming from a wide angle end state to a telephoto end state, at least a part of the fourth lens group (G4) is configured to serve as a focusing lens group to move in the optical axis direction upon focusing, the first lens group (G1) consists of two lenses, and the following conditional expression is satisfied.
0.30-
公开(公告)号：US11914125B2
公开(公告)日：2024-02-27
申请号：US17067898
申请日：2020-10-12
申请人： Nikon Corporation
发明人： Atsushi Suzuki , Kenji Ishida , Saburo Masugi
CPC分类号： G02B15/16 , G02B5/208 , G02B15/1461 , G02B15/145105 , G02B15/145117 , G02B15/145121 , G02B15/145129 , G02B15/20
摘要： A first lens group (G1) having positive refractive power, a second lens group (G2) having negative refractive power, a third lens group (G3) having positive refractive power, a fourth lens group (G4) having negative refractive power, and a fifth lens group (G5) having positive refractive power are arranged in order from an object, and zooming is performed by changing distances between each lens group, and the first lens group (G1) is composed of three or more lenses, the fourth lens group (G4) is composed of two or less lenses, and the fifth lens group (G5) is composed of two or less lenses and moves to an image surface side upon zooming from a wide angle end state to a telephoto end state, and the following conditional expression (1) is satisfied.
8.40-
公开(公告)号：US11960066B2
公开(公告)日：2024-04-16
申请号：US17368285
申请日：2021-07-06
发明人： Shinichiro Saito
CPC分类号： G02B15/145121 , G02B13/0045 , G02B13/006 , G02B15/1461
摘要： A zoom lens includes, in order from an object side to an image side, first, second and third lens units having positive, negative and positive refractive powers. The first lens unit moves during zooming. During zooming from a wide-angle end to a telephoto end, a distance between the first and second lens units widens, and a distance between the second and third lens units narrows. The first lens unit consists of three or less lenses. The second lens unit consists of, in order from the object side to the image side, a first single lens as a spherical lens having a negative refractive power, a cemented lens in which a lens having a negative refractive power and a lens having a positive refractive power are cemented, and a second single lens as a spherical lens having a negative refractive power. A predetermined condition is satisfied.
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公开(公告)号：US11768358B2
公开(公告)日：2023-09-26
申请号：US17551999
申请日：2021-12-15
申请人： Navitar, Inc.
发明人： Chad Byler
IPC分类号： G02B13/24 , G02B21/02 , G02B25/00 , G02B21/36 , G02B27/00 , G02B15/14 , G02B15/15 , G02B15/16 , G02B15/17 , G02B23/12 , G02B15/22 , G02B27/10
CPC分类号： G02B13/24 , G02B15/142 , G02B15/145117 , G02B15/145121 , G02B15/15 , G02B15/16 , G02B15/17 , G02B15/22 , G02B21/025 , G02B21/361 , G02B23/12 , G02B23/125 , G02B25/001 , G02B27/0075 , G02B27/108
摘要： A high etendue modular finite conjugate lens assembly has a zooming component with multiple lens groups, including four lens groups that each feature a doublet, and a lens attachment lens assembly comprising a fifth doublet, wherein the lens assembly is configured to exhibit between 0.45 and 4.65 mm2sr of etendue, and a ratio of highest to lowest magnification between 5.5:1 and 16:1, and a magnification of at least 2× at one or more points of a zoom range.
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公开(公告)号：US11703669B2
公开(公告)日：2023-07-18
申请号：US17126458
申请日：2020-12-18
发明人： Kenta Sudo , Kazuki Someya
CPC分类号： G02B15/1441 , G02B15/144113 , G02B15/145121 , G02B15/16
摘要： A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and one or more rear lens units. The first lens unit does not move for zooming. An interval between each pair of adjacent lens units changes in zooming. The first lens unit includes a positive lens made of material with an Abbe number less than 30. A predetermined condition is satisfied.
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公开(公告)号：US20230152560A1
公开(公告)日：2023-05-18
申请号：US17948671
申请日：2022-09-20
申请人： TAMRON CO., LTD.
发明人： Tomohiro KOBAYASHI
CPC分类号： G02B15/145121 , G02B15/20
摘要： The optical system includes a plurality of lens groups in which an interval between adjacent lens groups changes when focusing, and an aperture stop, and when intervals between an exit pupil of an on-axis ray by the aperture stop and an image plane in an infinite-distance object focusing state, a first short-distance object focusing state in which an imaging magnification is β1, and a second short-distance object focusing state in which an imaging magnification is β2 are Pinf, P1, and P2, respectively, the optical system satisfies predetermined conditions. An imaging apparatus includes the optical system and an image sensor.
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公开(公告)号：US20240219696A1
公开(公告)日：2024-07-04
申请号：US18605610
申请日：2024-03-14
发明人： Shinichiro Saito
CPC分类号： G02B15/145121 , G02B13/0045 , G02B13/006 , G02B15/1461
摘要： A zoom lens includes, in order from an object side to an image side, first, second and third lens units having positive, negative and positive refractive powers. The first lens unit moves during zooming. During zooming from a wide-angle end to a telephoto end, a distance between the first and second lens units widens, and a distance between the second and third lens units narrows. The first lens unit consists of three or less lenses. The second lens unit consists of, in order from the object side to the image side, a first single lens as a spherical lens having a negative refractive power, a cemented lens in which a lens having a negative refractive power and a lens having a positive refractive power are cemented, and a second single lens as a spherical lens having a negative refractive power. A predetermined condition is satisfied.
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公开(公告)号：US11796777B2
公开(公告)日：2023-10-24
申请号：US17098948
申请日：2020-11-16
申请人： TAMRON CO., LTD.
发明人： Takahiro Mitsuhashi
CPC分类号： G02B15/145121 , G02B15/16
摘要： A zoom lens includes a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a rear group having a positive refractive power as a whole in order from an object side. The zoom lens has specific optical characteristics indicated by two expressions.
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公开(公告)号：US20230333356A1
公开(公告)日：2023-10-19
申请号：US18198852
申请日：2023-05-18
申请人： Ricoh Company, Ltd.
发明人： Tomoya KOGA
CPC分类号： G02B15/145121 , G02B15/1461 , G02B15/16
摘要： A zoom lens includes a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a rear group, sequentially from an object side. Intervals between lens groups varies when changing magnification. A lens group having a highest negative refractive power among a lens group having a negative refractive power in the rear group is a focusing lens group GF configured to move toward an image side when focusing from infinity to a close range. A lens group GFF having a positive refractive power and arranged adjacent to an object side of the focusing lens group GF among a lens group having a positive refractive power included in the rear group includes a positive lens component L1 positioned on a most image side, which includes a positive lens L1P having a refractive index NdL1P, and a conditional expression (1) 1.85
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