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公开(公告)号：US10281706B2
公开(公告)日：2019-05-07
申请号：US15650061
申请日：2017-07-14
申请人： Konica Minolta, Inc.
发明人： Naoki Hirose
摘要： An observation optical system has an objective system and an eyepiece system in the order from the object side. The objective system includes, in the order from the object side, a first group having a positive power, a second group having a positive power, and a third group having a negative power. The objective system has an inverting optical system. The eyepiece system includes, in the order from the object side, a fourth group having a positive power and a fifth group having a positive power. The third group and the fourth group move in directions separating from each other along an optical axis to thereby perform variable power from a low magnification to a high magnification, and also the following conditional expression is satisfied: 0.28
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公开(公告)号：US10247927B2
公开(公告)日：2019-04-02
申请号：US15686260
申请日：2017-08-25
申请人： FUJIFILM Corporation
发明人： Kazuki Inoue , Yukiko Nagatoshi
IPC分类号： G02B15/167 , G02B15/20 , G02B13/16 , G02B15/177 , G02B15/163
摘要： In the zoom lens, a first optical system is formed on the magnification side, and a second optical system is formed on the reduction side, with the intermediate image formed between the first optical system and the second optical system. The second optical system consists of, in order from the magnification side, a first lens group that has a positive power, a second lens group that has a positive power, a third lens group that has a positive or negative power, and a fourth lens group that has a positive power. During zooming, the second lens group and the third lens group are moved by changing spacings between the groups adjacent to each other in a direction of an optical axis, and the fourth lens group remains stationary with respect to the reduction side imaging plane.
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公开(公告)号：US10168547B2
公开(公告)日：2019-01-01
申请号：US15955996
申请日：2018-04-18
发明人： Takakazu Bito
IPC分类号： G02B15/14 , G02B27/64 , G02B15/173 , G02B15/163
摘要： A zoom lens system according to the disclosure, in order from an object side to an image side, includes a first lens group with positive optical power, a second lens group with negative optical power, and a subsequent lens group composed of at least three lens groups. During zooming operation, the first lens group moves along the optical axis and the second lens group does not move. The second lens group has an aperture stop. The second lens group satisfies following condition (1), −9.0≤fG1/fG2≤−2.0 (1) where fG1 is the focal length of the first lens group, and fG2 is the focal length of the second lens group.
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14.发明申请公开(公告)号：US20180341092A1
公开(公告)日：2018-11-29
申请号：US15778253
申请日：2016-11-28
申请人： Nikon Corporation
发明人： Kosuke MACHIDA
IPC分类号： G02B15/163 , G02B13/02 , G02B13/18 , G02B27/64
摘要： A zoom optical system (ZL) comprises, in order from an object: a first lens group (G1) having positive refractive power; an intermediate group (GM) including at least one lens group and having negative refractive power as a whole; an intermediate side lens group (GRP1) having positive refractive power; a subsequent side lens group (GRP2) having positive refractive power; and a subsequent group (GR) including at least one lens group. The subsequent side lens group (GRP2) moves upon focusing. A following conditional expression is satisfied: 2.5
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公开(公告)号：US20180224641A1
公开(公告)日：2018-08-09
申请号：US15945661
申请日：2018-04-04
IPC分类号： G02B15/163 , G02B15/177 , H04N5/262 , G02B5/00 , G02B13/18 , G02B27/00 , H04N5/225 , G02B13/00 , G02B9/60 , G02B9/34 , G02B9/00 , G02B7/10 , G02B15/14 , G02B15/16 , G02B15/20 , G02B13/04
CPC分类号： G02B15/163 , G02B5/005 , G02B7/10 , G02B9/00 , G02B9/34 , G02B9/60 , G02B13/0015 , G02B13/004 , G02B13/0045 , G02B13/009 , G02B13/04 , G02B13/18 , G02B15/14 , G02B15/16 , G02B15/177 , G02B15/20 , G02B27/0025 , H04N5/2254 , H04N5/2628
摘要： A zoom lens comprises four lens unit, and at the time of zooming, each of a distance between a first positive lens unit and a first negative lens unit and a distance between a second negative lens unit and a second positive lens unit changes, and a distance between the first positive lens unit and the second negative lens unit widens more at the telephoto end than at the wide angle end, and the first positive lens unit includes an object-side sub-lens unit and an image-side sub-lens unit, and an aperture stop is disposed between the object-side sub-lens unit and the image-side sub-lens unit, and the first negative lens unit includes a negative lens and a positive lens, and a refracting surface nearest to an image in the first negative lens unit is concave toward the image side, and a refracting surface nearest to an object in the second positive lens unit is concave toward the object side, and a refracting surface nearest to the image in the second positive lens unit is convex toward the image side, and the zoom lens satisfies predetermined conditional expressions.
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公开(公告)号：US20180149844A1
公开(公告)日：2018-05-31
申请号：US15882486
申请日：2018-01-29
发明人： Tatsuyuki ONOZAKI
IPC分类号： G02B15/177 , G02B27/64 , G02B15/14 , G02B15/16 , G02B15/167 , G02B15/163
CPC分类号： G02B15/177 , G02B15/14 , G02B15/16 , G02B15/163 , G02B15/167 , G02B27/646
摘要： A zoom lens system includes a negative first lens group, a positive second lens group, a negative third lens group and a positive fourth lens group, in that order from the object side. Upon zooming from a short focal length extremity to a long focal length extremity, at least the first lens group, the second lens group and the fourth lens group are moved in the optical axis direction of the zoom lens. The third lens group includes a negative first sub-lens group and a negative second sub-lens group, in that order from the object side, the second sub-lens group is provided with a negative single lens element and a positive single lens element, and an air lens is formed between the negative single lens element and the positive single lens element.
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公开(公告)号：US20180143412A1
公开(公告)日：2018-05-24
申请号：US15819115
申请日：2017-11-21
发明人： Masaru Sakamoto , Masakazu Kodaira
IPC分类号： G02B15/163 , G02B15/20
CPC分类号： G02B15/163 , G02B15/17 , G02B15/20
摘要： A zoom lens includes, in order from the object side, a first lens unit having a positive refractive power that does not move for zooming, second to fourth lens units each having a negative refractive power that moves for zooming, and a relay lens unit having a positive refractive power and being closest to the image side that does not move for zooming. The second lens unit moves to the image side from the wide-angle end to the telephoto end. When a focal length fx determined by a focal length fw of the zoom lens at the wide-angle end and a zoom ratio Z is fx=fw×Z0.38, the zoom lens satisfies 0.05
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18.发明申请公开(公告)号：US20180129026A1
公开(公告)日：2018-05-10
申请号：US15539017
申请日：2015-12-25
申请人： Nikon Corporation
发明人： Hiroshi YAMAMOTO , Taku MATSUO , Akihiko OBAMA , Kensuke UCHIDA
IPC分类号： G02B15/20 , G02B27/64 , G02B15/163
CPC分类号： G02B15/20 , G02B15/163 , G02B15/173 , G02B27/646
摘要： A variable magnification optical system includes: a first lens group having a positive refractive power and arranged closest to an object; a negative lens group having a negative refractive power and arranged closer to an image than the first lens group; and a focusing group arranged between the negative lens group and an aperture stop, wherein when varying magnification, the distance between the first lens group and the negative lens group is changed, and the distance between the negative lens group and the aperture stop is changed, wherein when focusing, the distance between the focusing group and a lens arranged at a position to face an object-side of the focusing group is changed, and the distance between the focusing group and a lens arranged at a position to face an image-side of the focusing group is changed, wherein the focusing group is constituted by one single lens having a positive refractive power, and a predetermined conditional expression is satisfied.
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公开(公告)号：US09810889B2
公开(公告)日：2017-11-07
申请号：US14635195
申请日：2015-03-02
申请人： FUJIFILM Corporation
发明人： Tetsuya Ori , Michio Cho
IPC分类号： G02B27/64 , G02B15/14 , G02B15/163 , G02B15/173 , G02B15/20
CPC分类号： G02B15/163 , G02B15/173 , G02B15/20 , G02B27/646
摘要： A zoom lens consists of a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having positive refractive power, and a fifth lens group having positive refractive power in this order from an object side. The third lens group consists of a 3-1st lens group having positive refractive power and a 3-2nd lens group having negative refractive power in this order from the object side. A hand shake blur is corrected by moving the 3-2nd lens group in a direction perpendicular to optical axis. Magnification is changed by changing distances between the lens groups while the fifth lens group is fixed.
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公开(公告)号：US09753263B2
公开(公告)日：2017-09-05
申请号：US14855851
申请日：2015-09-16
发明人： Jiyeong Yoo
IPC分类号： G02B15/177 , G02B5/20 , G02B15/163 , G02B15/20 , G02B15/16 , G02B13/14
CPC分类号： G02B15/177 , G02B5/208 , G02B13/146 , G02B15/161 , G02B15/163 , G02B15/20
摘要： A zoom lens system includes: a first lens group having a negative refractive power; a second lens group having a positive refractive power; and an aperture between the first and second lens groups, wherein the first lens group and the second lens group are sequentially arranged from an object side to an image side, wherein the zoom lens system performs zooming and focusing by moving the second and first lens groups, respectively, along an optical axis, and satisfies 2.5
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