公开(公告)号：US09588323B2

公开(公告)日：2017-03-07

申请号：US14645942

申请日：2015-03-12

申请人： CANON KABUSHIKI KAISHA

发明人： Yuki Tatenuma ,  Masakazu Kodaira ,  Takahiro Yoshimi

IPC分类号： G02B15/17 ,  G02B15/173 ,  G02B15/177 ,  G02B15/28 ,  G02B15/26 ,  G02B15/24

CPC分类号： G02B15/17 ,  G02B15/173 ,  G02B15/177 ,  G02B15/24 ,  G02B15/26 ,  G02B15/28

摘要： The zoom lens according to the present invention includes in order from an object side to an image side: a first lens unit; a second lens unit; a third lens unit; an aperture stop; and a fourth lens unit; wherein a partial dispersion ratio θLm of a material of a positive lens Lm formed of a material having a highest partial dispersion ratio, which is contained in a rear group, a distance d from the aperture stop to an image plane, a distance dLm from the aperture stop to a positive lens Lm, an average value νRfp of Abbe constants of materials of positive lenses contained in a front group, an average value θRfp of partial dispersion ratios thereof, an average value νRfn of Abbe constants of materials of negative lenses contained in the front group, and an average value θRfn of partial dispersion ratios thereof are each appropriately set.

摘要翻译： 根据本发明的变焦透镜从物体侧到图像侧依次包括：第一透镜单元; 第二透镜单元; 第三透镜单元; 孔径光阑; 和第四透镜单元; 其中由包含在后组中的具有最高分散比的材料形成的正透镜Lm的材料的部分色散比θLm，从孔径光阑到像面的距离d，距离d 孔径光阑到正透镜Lm，前组中包含的正透镜的材料的阿贝常数的平均值νRfp，其部分色散比的平均值θRfp，负透镜的材料的阿贝常数的平均值νRfn包含在 正面组和其部分色散比的平均值θRfn分别适当地设定。

公开(公告)号：US09541747B2

公开(公告)日：2017-01-10

申请号：US14140472

申请日：2013-12-25

申请人： Yu-Hung Chou ,  Pei-Ching Liu

发明人： Yu-Hung Chou ,  Pei-Ching Liu

IPC分类号： G02B15/177 ,  G02B15/16 ,  G02B15/28

CPC分类号： G02B15/177 ,  G02B15/161 ,  G02B15/28

摘要： A zoom lens including a first lens group and a second lens group is provided. Refractive powers of the first lens group and the second lens group are respectively negative and positive. The first lens group includes a first lens, a second lens, and a third lens arranged in sequence from an object side to an image side. The second lens group is disposed between the first lens group and the image side, and includes a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in sequence from the object side to the image side. The zoom lens satisfies −2.4

摘要翻译： 提供了包括第一透镜组和第二透镜组的变焦透镜。 第一透镜组和第二透镜组的折射率分别为负和正。 第一透镜组包括从物体侧到像侧依次布置的第一透镜，第二透镜和第三透镜。 第二透镜组设置在第一透镜组和像侧之间，并且包括从物体侧到像侧依次布置的第四透镜，第五透镜，第六透镜，第七透镜和第八透镜。 变焦透镜满足-2.4

公开(公告)号：US20150153550A1

公开(公告)日：2015-06-04

申请号：US14616718

申请日：2015-02-08

申请人： NIKON CORPORATION

发明人： Satoshi YAMAGUCHI ,  Issei TANAKA

IPC分类号： G02B15/173 ,  G02B27/64 ,  G02B1/11

CPC分类号： G02B15/173 ,  G02B1/11 ,  G02B15/28 ,  G02B27/646

摘要： Comprising, in order from an object side: 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; and a fourth lens group G4 having positive refractive power; upon zooming from a wide-angle end state to a telephoto end state, the first lens group G1 being fixed in the position in the direction of the optical axis, at least the second lens group G2 and the third lens group G3 being moved in the direction of the optical axis such that a distance between the first lens group G1 and the second lens group G2 is increased and a distance between the second lens group G2 and the third lens group G3 is decreased; and a predetermined conditional expression being satisfied, thereby providing a variable magnification optical system which can suppress variations in aberrations upon zooming and having excellent optical performance from a wide angle end state to a telephoto end state, an optical apparatus, and a method for manufacturing a variable magnification optical system.

摘要翻译： 从物体侧起依次包括：具有正折射力的第一透镜组G1; 具有负屈光力的第二透镜组G2; 具有正屈光力的第三透镜组G3; 和具有正折射光焦度的第四透镜组G4; 在从广角端状态变焦到望远端状态时，第一透镜组G1被固定在光轴方向的位置，至少第二透镜组G2和第三透镜组G3在 光轴的方向使得第一透镜组G1和第二透镜组G2之间的距离增加，并且第二透镜组G2和第三透镜组G3之间的距离减小; 并且满足预定的条件表达式，从而提供可以抑制变焦时的像差变化并且具有从广角端状态到望远端状态的优异的光学性能的可变放大倍数光学系统，光学装置和用于制造 可变放大光学系统。

公开(公告)号：US20130271848A1

公开(公告)日：2013-10-17

申请号：US13913930

申请日：2013-06-10

申请人： FUJIFILM Corporation

发明人： Akiko NAGAHARA

IPC分类号： G02B15/14

CPC分类号： G02B15/14 ,  G02B13/16 ,  G02B15/173 ,  G02B15/28

摘要： Composing a projection zoom lens with a first lens group disposed on the most magnification side and having a positive power, the lens group being fixed at the time of zooming, a final lens group disposed on the most reduction side and having a negative power, the lens group being fixed at the time of zooming, and a plurality of lens groups disposed between the first and final lens groups and moved at the time of zooming along an optical axis in association with each other for the zooming and correction of image plane shift arising from the zooming, in which the final lens group includes a lens having a positive power on the most reduction side.

摘要翻译： 构成具有设置在最大放大倍率上并具有正功率的第一透镜组的投影变焦透镜，在变焦时固定透镜组，设置在最大减少侧并具有负光焦度的最终透镜组， 透镜组在变焦时被固定，以及多个透镜组，其设置在第一和最后透镜组之间并且在沿着光轴的变焦时相互关联地移动，用于发生图像平面偏移的变焦和校正 其中最终透镜组包括在最大减少侧上具有正功率的透镜的变焦。

公开(公告)号：US07898744B2

公开(公告)日：2011-03-01

申请号：US12048198

申请日：2008-03-13

申请人： Mitsuaki Wada

发明人： Mitsuaki Wada

IPC分类号： G02B15/14

CPC分类号： G02B7/105 ,  G02B13/26 ,  G02B15/28

摘要： Providing a close-up lens with superb optical performance capable of focusing from infinity to a close distance allowing a life-size magnification by an internal focusing system with small moving amounts of focusing lens groups, an imaging apparatus, and a method for focusing a close-up lens. The close-up lens includes four lens groups, and is able to focus an object with an imaging magnification from β=0 through at least β=−0.5, wherein upon focusing, a first lens group and a fourth lens group are fixed with respect to an image plane, and a second lens group and a third lens group are moved along an optical axis.

摘要翻译： 提供具有卓越光学性能的特写镜头，能够从无穷远到近距离聚焦，允许通过具有小移动量的聚焦透镜组的内部聚焦系统进行终生尺寸放大，成像装置和用于聚焦的方法 镜头。 特写镜头包括四个透镜组，并且能够将来自＆bgr = 0的成像放大率的对象聚焦到至少＆bgr = -0.5，其中在聚焦时，第一透镜组和第四透镜组被固定 相对于图像平面，并且第二透镜组和第三透镜组沿着光轴移动。

公开(公告)号：US07855842B2

公开(公告)日：2010-12-21

申请号：US12490561

申请日：2009-06-24

申请人： Kazuyasu Ohashi

发明人： Kazuyasu Ohashi

IPC分类号： G02B15/14 ,  G02B15/22

CPC分类号： G02B15/173 ,  G02B15/28

摘要： A zoom lens unit including, in order from an object side to an image surface side: a first lens group having a positive refracting power; a second lens group having a negative refracting power; a third lens group having a positive refracting power; and a fourth lens group having a positive refracting power, wherein when changing magnification from a wide-angle end to a telephoto end, an interval between the first lens group and the second lens group increases, an interval between the second lens group and the third lens group decreases, and an interval between the third lens group and the fourth lens group increases, wherein when performing focusing on a close range object at least at the telephoto end, with reference to a focused state on an infinite object, the first lens group and the second lens group are fixed, the third lens group is capable of being moved to the image surface side, and the fourth lens group is capable of being moved to the object side.

摘要翻译： 1.一种变焦透镜单元，包括从物体侧到图像面侧的顺序：具有正折射率的第一透镜组; 具有负折射率的第二透镜组; 具有正折射率的第三透镜组; 以及具有正折射率的第四透镜组，其中当从广角端到望远端改变倍率时，第一透镜组和第二透镜组之间的间隔增加，第二透镜组和第三透镜组之间的间隔 透镜组减小，并且第三透镜组和第四透镜组之间的间隔增加，其中当至少在望远端对近距离物体进行聚焦时，参考无限物体上的聚焦状态，第一透镜组 并且第二透镜组被固定，第三透镜​​组能够移动到图像表面侧，并且第四透镜组能够移动到物体侧。

公开(公告)号：US20100007967A1

公开(公告)日：2010-01-14

申请号：US12490561

申请日：2009-06-24

申请人： Kazuyasu Ohashi

发明人： Kazuyasu Ohashi

IPC分类号： G02B15/22

CPC分类号： G02B15/173 ,  G02B15/28

摘要： A zoom lens unit including, in order from an object side to an image surface side: a first lens group having a positive refracting power; a second lens group having a negative refracting power; a third lens group having a positive refracting power; and a fourth lens group having a positive refracting power, wherein when changing magnification from a wide-angle end to a telephoto end, an interval between the first lens group and the second lens group increases, an interval between the second lens group and the third lens group decreases, and an interval between the third lens group and the fourth lens group increases, wherein when performing focusing on a close range object at least at the telephoto end, with reference to a focused state on an infinite object, the first lens group and the second lens group are fixed, the third lens group is capable of being moved to the image surface side, and the fourth lens group is capable of being moved to the object side.

摘要翻译： 1.一种变焦透镜单元，包括从物体侧到图像面侧的顺序：具有正折射率的第一透镜组; 具有负折射率的第二透镜组; 具有正折射率的第三透镜组; 以及具有正折射率的第四透镜组，其中当从广角端到望远端改变倍率时，第一透镜组和第二透镜组之间的间隔增加，第二透镜组和第三透镜组之间的间隔 透镜组减小，并且第三透镜组和第四透镜组之间的间隔增加，其中当至少在望远端对近距离物体进行聚焦时，参考无限物体上的聚焦状态，第一透镜组 并且第二透镜组被固定，第三透镜​​组能够移动到图像表面侧，并且第四透镜组能够移动到物体侧。

公开(公告)号：US20180113288A1

公开(公告)日：2018-04-26

申请号：US15786712

申请日：2017-10-18

申请人： CANON KABUSHIKI KAISHA

发明人： Koichi Sakuma

IPC分类号： G02B15/28 ,  G02B13/18

CPC分类号： G02B15/28 ,  G02B13/18 ,  G02B15/173 ,  G03B3/00

摘要： A zoom lens includes a positive first unit, a negative second unit, and a rear lens system. The rear lens system includes a positive unit A, a negative unit B, and a positive C. The first unit is not moved for zooming, the unit A is moved for zooming, and intervals between adjacent lens units are changed during zooming. The first unit includes positive and negative lenses, the unit C includes positive and negative lenses, the second unit includes negative lenses, and the unit B includes positive lenses. An Abbe number average value of the positive lenses in the first unit, an Abbe number average value of the negative lenses in the second unit, an Abbe number average value of the positive lenses in the unit B, and an Abbe number average value of the positive lenses in the unit C are appropriately set.

公开(公告)号：US20180045928A1

公开(公告)日：2018-02-15

申请号：US15647849

申请日：2017-07-12

申请人： CANON KABUSHIKI KAISHA

发明人： Shoichi Takemoto

IPC分类号： G02B15/167 ,  G02B15/28

CPC分类号： G02B15/167 ,  G02B15/173 ,  G02B15/28

摘要： A zoom lens includes, in order from object-side, a fixed positive first group including three-or-more lenses, a negative second group including a unit moving toward image-side during zooming toward telephoto-end, a positive third group including a unit moving toward object-side during zooming from wide-end to telephoto-end, a negative fourth group moving during zooming and focusing, and a rear group. Focal lengths of the first group and the zoom lens at wide-end, a movement amount of a unit moving by largest amount during zooming toward telephoto-end in the second group, a largest value of position change between wide-end and telephoto-end of units moving toward an object side during zooming from wide-end to telephoto-end, refractive index for d-line of a positive lens closest to image-side in the first group, and average refractive index for d-line of positive lenses of the first group other than the positive lens are appropriately set.

公开(公告)号：US20180031811A1

公开(公告)日：2018-02-01

申请号：US15550440

申请日：2016-02-25

申请人： Nikon Corporation

发明人： Satoshi MIWA ,  Masashi YAMASHITA

IPC分类号： G02B15/167 ,  G02B7/04 ,  G02B27/64 ,  G02B13/02 ,  G02B27/00

CPC分类号： G02B15/167 ,  G02B7/04 ,  G02B13/02 ,  G02B15/22 ,  G02B15/28 ,  G02B27/0037 ,  G02B27/646

摘要： An optical system includes: a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group, disposed in this order along an optical axis starting from an object side, wherein: the second lens group is movable along the optical axis to perform focusing from an infinity-distance object to a short-distance object; and the third lens group comprises: a vibration-proofing lens group configured to be movable in a direction having a component perpendicular to the optical axis to perform image surface correction on image blurring; and an adjustment lens group that is disposed closer to an image side than the vibration-proofing lens group is, the adjustment lens group including a negative lens Ln and a lens group having a positive refractive power, disposed next to the negative lens Ln, and the adjustment lens group being capable of adjusting an air gap between the negative lens Ln and the lens group having a positive refractive power.