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公开(公告)号：US20210181458A1
公开(公告)日：2021-06-17
申请号：US17256471
申请日：2019-06-04
摘要： A lens barrel capable of increasing the moving range of a lens includes: a lens retainer frame for holding a lens; a drive unit for driving the lens retainer frame along the optical axis direction; a first cylinder that holds the drive unit and has a cam follower; a second cylinder that has a cam groove for engaging the cam follower; and a bias part for biasing the first cylinder along the optical axis.
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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
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.
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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
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。
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公开(公告)号：US20210278571A1
公开(公告)日：2021-09-09
申请号：US17256493
申请日：2019-06-04
申请人： NIKON CORPORATION
发明人： Kunihiko SHIMIZU , Mizuki WAYU
摘要： A lens barrel is capable of changing the aperture diameter according to a zoom position while having a short length. A lens barrel includes: a aperture unit having a cam follower; and a moving tube having a cam groove for engaging the cam follower, the moving tube being provided at the outer circumference of the aperture unit and able to move along the optical axis direction.
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公开(公告)号：US20180307004A1
公开(公告)日：2018-10-25
申请号：US15769081
申请日：2016-10-24
申请人： NIKON CORPORATION
摘要： A lens barrel is removeably attachable to an image pickup unit, wherein a large amount of shake can be corrected. This lens barrel includes a mounting part that is removeably attachable to an image pickup unit, including: an image forming optical system that forms a subject image for the image pickup unit; a support unit that supports at least a portion of the image forming optical system; and a fixed unit that is disposed outside of the support unit and that is fixed to the mounting unit. The support part is relatively rotatable and moveable with respect to the fixed unit, about at least two axes which are substantially orthogonal to the light axis of the image forming optical system.
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