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    • 31. 发明授权
    • Variable focal length lens system
    • 可变焦距镜头系统
    • US06304389B1
    • 2001-10-16
    • US09630586
    • 2000-08-01
    • Atsushi Shibayama
    • Atsushi Shibayama
    • G02B1514
    • G02B15/177
    • The present invention makes it possible to provide a variable focal length lens system having a zoom ratio of 2.5 or over, a field angle of 60° or over at the wide-angle end, and an excellent imaging quality which is suited for use with a video camera and the like. According to one aspect of the present invention, a variable focal length lens system has, in order from an object side, a first negative lens group G1, a second positive lens group G2, and a third positive lens group G3. The first lens group includes, in order from the object side, a negative lens unit 1-1 U11 and a positive lens unit 1-2 U12 separated by predetermined air space; and the second lens group includes, in order from the object side, a positive lens unit 2-1 U21, a negative lens unit 2-2 U22 separated by predetermined air space, and a positive lens unit 2-3 U23 separated by predetermined air space, with the first and second lens groups being moved such that when a state of the lens group positions is changed from a wide-angle end state to a telephoto end state, a space between the first and second lens group is decreased and a space between the second and third lens groups is increased while the third lens group is fixed, and further with designated conditional equations being satisfied.
    • 本发明使得可以在广角端提供具有2.5或更大的变焦比,60°或更大的场角的可变焦距透镜系统,以及适合与 摄像机等。 根据本发明的一个方面,可变焦距透镜系统从物体侧依次具有第一负透镜组G1,第二正透镜组G2和第三正透镜组G3。 第一透镜组从物体依次包括由预定空气间隔分开的负透镜单元1-1U11和正透镜单元1-2U12; 并且第二透镜组从物体侧依次包括由预定空气间隔开的正透镜单元2-1 U21,负透镜单元2-2 U22和由预定空气分开的正透镜单元2-3 U23 空间,其中第一和第二透镜组被移动,使得当透镜组位置的状态从广角端状态改变为远摄端状态时,第一和第二透镜组之间的空间减小,并且空间 在第三透镜组被固定的同时,在第二透镜组和第三透镜组之间增加,并且进一步满足指定的条件方程。
    • 33. 发明授权
    • High zoom ratio zoom lens
    • 高变焦倍率变焦镜头
    • US5694253A
    • 1997-12-02
    • US595031
    • 1996-01-31
    • Atsushi Shibayama
    • Atsushi Shibayama
    • G02B15/173G02B15/14
    • G02B15/173
    • A compact zoom lens has a high zoom ratio that is suitable for a single lens reflex camera. Embodiments of the zoom lens include, in order from the object side, a first lens unit of positive refractive power, a second lens unit of negative refractive power, and a third lens unit of positive refractive power, that all move toward the object during zooming from the maximum wide-angle state to the maximum telephoto state, with the distance between the first lens unit and the second lens unit increasing, and the distance between the second lens unit and the third lens unit decreasing; and wherein various conditions are satisfied. The zoom lens may include a focal length shorter than the length of the diagonal of the effective picture plane and a focal length longer than three times the length of the diagonal of the effective picture plane, and includes a fourth lens unit of positive refractive power on the image side of the third lens unit, wherein during zooming from the maximum wide-angle state to the maximum telephoto state, the distance between the third lens unit and the fourth lens unit decreases with the fourth lens unit also moving toward the object.
    • 紧凑型变焦镜头具有适用于单个镜头反光相机的高变焦比。 变焦透镜的实施例按照从物体侧起依次具有正屈光力的第一透镜单元,负折光力的第二透镜单元和正折光力的第三透镜单元,在变焦期间全部朝向物体移动 从最大广角状态到最大远摄状态,第一透镜单元和第二透镜单元之间的距离增加,并且第二透镜单元与第三透镜单元之间的距离减小; 并且其中满足各种条件。 变焦镜头可以包括比有效画面的对角线的长度短的焦距和比有效画面的对角线的长度的三倍的焦距,并且包括正屈光力的第四透镜单元 第三透镜单元的图像侧,其中在从最大广角状态变焦到最大远摄状态的同时,第三透镜​​单元和第四透镜单元之间的距离随着第四透镜单元也向着物体移动而减小。
    • 34. 发明授权
    • Camera capable of panorama phototaking
    • 相机能够进行全景拍摄
    • US5640614A
    • 1997-06-17
    • US406172
    • 1995-03-17
    • Koichi OhshitaAtsushi ShibayamaSusumu Sato
    • Koichi OhshitaAtsushi ShibayamaSusumu Sato
    • G03B37/00G02B15/16G03B1/50G03B17/28G03B17/02
    • G02B15/161G03B1/50G03B37/00G03B2217/248
    • In a phototaking lens with the focal length variable from a predetermined value at the wide-angle end position to another predetermined value at the telephoto end position, a part of lens elements constituting the phototaking lens is rendered movable relative to other lens components. There is provided means for converting the lens, by the relative movement of a part of the lens elements, to a panorama state with a focal length even shorter than that at the wide-angle end position. The phototaking lens is a zoom lens having a first lens group of a positive refractive power and a second lens group of a negative refractive power in the order from the object side, wherein the focal length is varied by a change in the distance between the first and second lens groups, and the panorama state is obtained by a relative movement of the first lens group relative to the second lens group.
    • 在焦距从广角端位置的预定值变化到望远端位置处的另一预定值的摄像透镜中,构成摄像透镜的透镜元件的一部分能够相对于其他透镜部件移动。 提供了用于通过一部分透镜元件的相对运动将透镜转换成具有比广角端位置处的焦距更短的焦距的全景状态的装置。 感光透镜是具有正屈光力的第一透镜组和物镜侧的次数的负屈光力的第二透镜组的变焦透镜,其中焦距通过第一和第二像素之间的距离的变化而变化 和第二透镜组,并且通过第一透镜组相对于第二透镜组的相对运动获得全景状态。
    • 35. 发明授权
    • Anti-vibration optical device
    • 防振光学装置
    • US5517357A
    • 1996-05-14
    • US217879
    • 1994-03-25
    • Atsushi Shibayama
    • Atsushi Shibayama
    • G02B7/08G02B15/00G02B27/64G03B5/00H04N5/232G01C3/12
    • H04N5/23258G02B27/646G03B5/00H04N5/23248H04N5/23287G03B2205/0015G03B2205/0053G03B2217/005
    • An optical device having an objective lens system including at least two lens groups (at least one of which is shiftable in the optical axis direction), a vibration detector for detecting a vibration of the objective lens system, and outputting a signal indicating the vibration of the objective lens system, a vibration compensation unit arranged at a position other than the position of the most-object side lens group of the objective lens system, and at least one shift amount detector for detecting the shift amount, in the optical axis direction, of the shiftable lens of the objective lens system, and outputting a signal indicating the shift amount. The drive amount of the vibration compensation unit is calculated based on the signal from the shift amount detector and the signal from the vibration detector.
    • 一种具有物镜系统的光学装置,该物镜系统包括至少两个透镜组(其中至少一个可在光轴方向上移动),用于检测物镜系统的振动的振动检测器,并输出表示振动的信号 物镜系统,布置在物镜系统的最物体侧透镜组以外的位置处的振动补偿单元,以及用于检测光轴方向上的偏移量的至少一个偏移量检测器, 并输出表示移位量的信号。 基于来自移动量检测器的信号和来自振动检测器的信号计算振动补偿单元的驱动量。
    • 36. 发明授权
    • Zoom lens
    • 变焦镜头
    • US5000551A
    • 1991-03-19
    • US532792
    • 1990-06-04
    • Atsushi Shibayama
    • Atsushi Shibayama
    • G02B15/173
    • G02B15/173
    • A zoom lens comprises, in succession from the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power, and is designed such that during the magnification change from the wide angle end to the telephoto end, the air space between the first lens group and the second lens group is enlarged, the air space between the second lens group and the third lens group is reduced and further, the air space between the third lens group and the fourth lens group is varied. The second lens group comprises, in succession from the object side, a negative meniscus lens having its convex surface facing the object side, a biconcave negative lens, and a cemented positive lens consisting of a biconvex positive lens and a biconcave negative lens cemented together, and is designed to satify the following conditions: ##EQU1##
    • 变焦透镜从物体侧依次包括具有正折光力的第一透镜组,具有负屈光力的第二透镜组,具有正折光力的第三透镜组,以及具有正折光力的第四透镜组 并且被设计成使得在从广角端到望远端的放大率变化期间,第一透镜组和第二透镜组之间的空气空间被扩大,第二透镜组和第三透镜之间的空气空间 组进一步减少,第三透镜​​组和第四透镜组之间的空气空间变化。 第二透镜组从物体侧依次包括其凸面朝向物体侧的负凹凸透镜,双凹面负透镜和由双凸正透镜和双凹面负透镜粘合在一起的胶结正透镜, 并设计为满足以下条件:0.44 <| f2 / fw| <0.51
    • 39. 发明授权
    • Zoom lens adjustment method
    • 变焦镜头调整方法
    • US5973855A
    • 1999-10-26
    • US198936
    • 1998-11-24
    • Atsushi Shibayama
    • Atsushi Shibayama
    • G02B7/10G02B15/16G02B15/14G03B17/00
    • G02B7/10
    • A zoom lens adjustment method capable of being applied to zoom lenses for use in video cameras, electronic still cameras, or the like employing solid-state image sensors. An amount of integral movement .delta.1 by which a first lens group (G1) and a second lens group (G2) must axially move from an extreme-wide-angle-state (W) reference positions to cause the actual and reference image planes (IPA and IPR) to coincide is determined. Then, an amount of additional movement .delta.2 by which only the first lens group must be moved to cause the actual and reference image planes to coincide after causing the first and second lens groups to move in integral fashion by the amount .delta.1 when in the extreme-telephoto-state reference positions is determined. Then, from the values of .delta.1 and .delta.2, amounts of positional correction P1 and P2 of first and second lens groups, respectively, from respective reference positions in one of the focal length states between the extreme wide-angle and extreme telephoto states are established. These positional corrections are then applied to the lens groups to reduce or eliminate the positional misalignment between the actual and reference object planes.
    • 一种变焦透镜调节方法​​,其能够应用于使用固态图像传感器的摄像机,电子静态照相机等中使用的变焦透镜。 第一透镜组(G1)和第二透镜组(G2)必须从极广角度状态(W)参考位置轴向移动的整体运动增量1的量,以使实际和参考图像平面 IPA和IPR)确定。 然后,一定量的额外的运动增量2,只有第一透镜组必须被移动以使得实际和参考图像平面在导致第一和第二透镜组以整数的方式移动量Δ1之后重合 确定极远摄状态参考位置。 然后,从Δ1和Δ2的值分别来看,在极端广角和极远摄状态之间的一个焦距状态下,来自相应参考位置的第一和第二透镜组的位置校正P1和P2分别为 成立 然后将这些位置校正应用于透镜组以减少或消除实际和参考对象平面之间的位置偏移。
    • 40. 发明授权
    • Zoom lens
    • 变焦镜头
    • US5920435A
    • 1999-07-06
    • US899640
    • 1997-07-24
    • Atsushi Shibayama
    • Atsushi Shibayama
    • G02B15/173G02B15/14
    • G02B15/173
    • A zoom lens comprises, in order from an object side, a first lens group G1 having a negative refracting power, a second lens group G2 having a positive refracting power, a third lens group G3 having a negative refracting power, and a fourth lens group G4 having a positive refracting power. A focal length of the zoom lens is changed from a wide angle end to a telephoto end by changing an air gap between the first lens group G1 and the second lens group G2, increasing an air gap between the second lens group G2 and the third lens group G3, and reducing an air gap between the third lens group G3 and the fourth lens group G4. When a focal length of the first lens group G1 is f1, a focal length of the total lens system at the wide angle end is fw, and an axial air gap between the first lens group G1 and the second lens group G2 in an infinity in-focus state at the wide angle end is D12W, the zoom lens satisfies following conditions: 0.8
    • 变焦透镜从物体侧依次包括具有负折射力的第一透镜组G1,具有正折射力的第二透镜组G2,具有负折射光焦度的第三透镜组G3和第四透镜组 G4具有正折射力。 通过改变第一透镜组G1和第二透镜组G2之间的气隙,变焦透镜的焦距从广角端变为望远端,增大第二透镜组G2和第三透镜之间的气隙 并且减少第三透镜组G3和第四透镜组G4之间的气隙。 当第一透镜组G1的焦距为f1时,广角端的全透镜系统的焦距为fw,第一透镜组G1和第二透镜组G2之间的轴向气隙为无穷远 在广角端的聚焦状态为D12W,变焦透镜满足以下条件:0.8 <| f1 | / fw <1.6,D12W / fw <0.1。 优选的变焦透镜可被构造成允许从无穷远连续地对焦到在从广角端到远摄端的任何焦距处的无穷远对焦状态下望远端处的焦距大约两倍的物体距离, 移动所述第一透镜组G1。