公开(公告)号：US20230176321A1

公开(公告)日：2023-06-08

申请号：US17919603

申请日：2021-05-26

申请人： NIKON CORPORATION

发明人： Takumi NAKANO ,  Takuji HAMASAKI

IPC分类号： G02B7/10 ,  G03B13/34

CPC分类号： G02B7/10 ,  G03B13/34

摘要： A lens barrel includes a first lens holding frame that holds a first lens and has a first protruding portion, a first motor configured to move the first lens holding frame in an optical axis direction, a second lens holding frame that holds a second lens and has a second protruding portion, a second motor configured to move the second lens holding frame in the optical axis direction, and an outer barrel that has a straight groove engaging with the first protruding portion and the second protruding portion and extending in the optical axis direction, and is disposed further outward than the first lens holding frame and the second lens holding frame.

公开(公告)号：US20230393364A1

公开(公告)日：2023-12-07

申请号：US18035546

申请日：2021-12-09

申请人： NIKON CORPORATION

发明人： Koji NAGAOKA ,  Takuji HAMASAKI

IPC分类号： G02B7/02 ,  G02B7/10

CPC分类号： G02B7/021 ,  G02B7/10

摘要： A lens barrel having good optical performance, the lens barrel includes a first lens holding frame that holds a first lens, a first guide bar that guides the first lens holding frame in an optical axis direction, a contact member that is in contact with the first guide bar, and a biasing member that is in contact with the first lens holding frame and biases the contact member toward the first guide bar.

公开(公告)号：US20220128788A1

公开(公告)日：2022-04-28

申请号：US17430590

申请日：2019-12-18

申请人： NIKON CORPORATION

发明人： Satoshi YAMADA ,  Takuji HAMASAKI ,  Takashi KISHIMOTO

IPC分类号： G02B7/04 ,  G03B17/14 ,  G02B7/02

摘要： A lens barrel is provided with: a first tube; a second tube arranged on one side among the radial outside or inside of the first tube and having a linear grove along an optical axis; a fixing member provided to the first tube; a movable member that is movably held by the fixing member and has a first protruding section arranged in the linear groove; and an elastic section arranged between the fixing member and the movable member, wherein the first protruding section abuts against one side surface of the linear groove by means of the elastic section.

公开(公告)号：US20210311376A1

公开(公告)日：2021-10-07

申请号：US17269107

申请日：2019-08-20

申请人： NIKON CORPORATION

发明人： Kunihiko SHIMIZU ,  Hisanori TOGAWA ,  Koji NAGAOKA ,  Takuji HAMASAKI

IPC分类号： G03B17/14 ,  G02B7/04 ,  G02B7/14 ,  G02B7/02

摘要： A lens barrel includes a first frame, a second frame rotatable with respect to the first frame, an urging member held by one of the first frame and the second frame, and a moving member that is disposed to be movable in optical axis direction and transfers an urging force of the urging member to the another one of the first frame and the second frame.

公开(公告)号：US20180113271A1

公开(公告)日：2018-04-26

申请号：US15538718

申请日：2015-12-24

申请人： NIKON CORPORATION

发明人： Kazuaki KAMIO ,  Takuji HAMASAKI

IPC分类号： G02B7/04 ,  G03B17/14

CPC分类号： G02B7/04 ,  G02B7/021 ,  G03B5/00 ,  G03B17/12 ,  G03B17/14 ,  G03B2205/0046 ,  G03B2205/0053

摘要： Lens barrel includes: a first barrel; and a second barrel that is arranged on an outer circumferential side or on an inner circumferential side of first barrel, second barrel being movable in a first direction relative to first barrel without being rotated relative to the first barrel, wherein: second barrel has a first engaging part that protrudes toward first barrel and a second engaging part that protrudes toward first barrel, the second engaging part being different from first engaging part; the first barrel has a first engaged part with which the first engaging part is engaged so as to be linearly movable and a second engaged part with which the second engaging part is engaged so as to be linearly movable; and one end of the first engaging part and another end of the second engaging part are arranged at different positions in a linear motion direction.

公开(公告)号：US20150226930A1

公开(公告)日：2015-08-13

申请号：US14694911

申请日：2015-04-23

申请人： NIKON CORPORATION

发明人： Hiroyuki ISHIGAMI ,  Kunihiko SHIMIZU ,  Akihiko OBAMA ,  Takuji HAMASAKI

IPC分类号： G02B7/00 ,  G02B1/11 ,  G02B15/16

CPC分类号： G02B15/142 ,  G02B1/11 ,  G02B9/04 ,  G02B9/10 ,  G02B13/18 ,  G02B15/173 ,  G02B15/20 ,  G02B27/646

摘要： Provided is an optical system comprising a first lens group G1 disposed in a most object side and having positive refractive power, a stop member ST disposed at an image side of the first lens group G1, a second lens group G2 disposed at an image side of the stop member ST, and predetermined conditional expression being satisfied, whereby light outside of an effective light flux (beyond the maximum angle of view) collected on the focal point position of a most object side lens group having positive refractive power is reduced, so that heat generated by a member in the vicinity of the focal point position being reduced, thereby it being possible to prevent deformation or deterioration of the member and reduce influence on the imaging performance. An optical apparatus equipped with the optical system is also provided.

摘要翻译： 本发明提供一种光学系统，其包括设置在最物体侧且具有正折光力的第一透镜组G1，设置在第一透镜组G1的像侧的停止构件ST，设置在第一透镜组G1的像侧的第二透镜组G2 停止构件ST和预定条件表达式被满足，由此聚焦在具有正折射力的最物体侧透镜组的焦点位置上的有效光束（超过最大视角）之外的光减少，使得 由焦点位置附近的构件产生的热量减少，从而可以防止构件的变形或劣化，并降低对成像性能的影响。 还提供了配备有光学系统的光学装置。