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    • 41. 发明授权
    • High variable power ratio zoom lens
    • 高可变功率比变焦镜头
    • US5379154A
    • 1995-01-03
    • US97030
    • 1993-07-27
    • Atsushi ShibayamaSusumu Sato
    • Atsushi ShibayamaSusumu Sato
    • G02B15/20G02B15/163G02B15/14
    • G02B15/163
    • In a zoom lens having, in succession from the object side, a first lens unit having positive refractive power, a second lens unit having positive refractive power, and a third lens unit having negative refractive power, the spacing between the first lens unit and the second lens unit being increased and the spacing between the second lens unit and the third lens unit being decreased during the magnification change from the wide angle end to the telephoto end, the first lens unit has at least one positive lens and at least one negative lens, the second lens unit comprises, in succession from the object side, a front group of weak refractive power and a rear group of positive refractive power, the front group having at least one negative lens and at least one positive lens, the rear group having, in succession from the object side, at least one positive lens, at least one negative lens and at least one positive lens, and the third lens unit has at least one positive lens and at least one negative lens. The zoom lens satisfies predetermined conditions.
    • 在从物体侧连续地具有正屈光力的第一透镜单元,具有正折光力的第二透镜单元和具有负屈光力的第三透镜单元的变焦透镜中,第一透镜单元和第二透镜单元之间的间隔 第二透镜单元在从广角端到远摄端的放大率变化期间增加并且第二透镜单元和第三透镜单元之间的间隔减小,第一透镜单元具有至少一个正透镜和至少一个负透镜 第二透镜单元从物体侧连续地包括弱折射力的前组和正屈光力的后组,前组具有至少一个负透镜和至少一个正透镜,后组具有 从物体侧连续至少一个正透镜,至少一个负透镜和至少一个正透镜,并且第三透镜单元具有至少一个正透镜和至少一个正透镜 负透镜 变焦透镜满足预定条件。
    • 43. 发明授权
    • Zoom lens system
    • 变焦镜头系统
    • US07388717B2
    • 2008-06-17
    • US11655982
    • 2007-01-22
    • Keiko MizuguchiAtsushi Shibayama
    • Keiko MizuguchiAtsushi Shibayama
    • G02B15/14
    • G02B15/177
    • The invention provides a zoom lens system suitable for an image gathering system using a solid-state imaging device, having a zoom ratio of about three, a small lens length, and superb optical performance. The zoom lens system includes, in order from an object, a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having positive refractive power. The first lens group consists only of a negative lens and a positive lens. The second lens group includes at least two positive lenses and at least one negative lens. The third lens group consists of one lens. Zooming from a wide-angle end state to a telephoto end state is conducted by decreasing a distance between the first and second lens groups, increasing a distance between the second and third lens groups, and fixing the third lens group. Given conditions are satisfied.
    • 本发明提供了一种适用于使用固态成像装置的图像采集系统的变焦透镜系统,其具有大约三倍的变焦比,小的透镜长度和极好的光学性能。 变焦透镜系统从物体依次包括具有负折光力的第一透镜组,具有正屈光力的第二透镜组和具有正屈光力的第三透镜组。 第一透镜组仅由负透镜和正透镜组成。 第二透镜组包括至少两个正透镜和至少一个负透镜。 第三透镜组由一个透镜组成。 通过减小第一和第二透镜组之间的距离,增加第二和第三透镜组之间的距离以及固定第三透镜组来实现从广角端状态到远摄端状态的放大。 给定条件满意。
    • 45. 发明申请
    • Zoom lens system
    • 变焦镜头系统
    • US20050157405A1
    • 2005-07-21
    • US11081511
    • 2005-03-17
    • Keiko MizuguchiAtsushi Shibayama
    • Keiko MizuguchiAtsushi Shibayama
    • G02B15/163G02B13/18G02B15/177G02B15/14
    • G02B15/177
    • The invention provides a zoom lens system suitable for an image gathering system using a solid-state imaging device, having a zoom ratio of about three, a small lens length, and superb optical performance. The zoom lens system includes, in order from an object, a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having positive refractive power. The first lens group consists only of a negative lens and a positive lens. The second lens group includes at least two positive lenses and at least one negative lens. The third lens group consists of one lens. Zooming from a wide-angle end state to a telephoto end state is conducted by decreasing a distance between the first and second lens groups, increasing a distance between the second and third lens groups, and fixing the third lens group. Given conditions are satisfied.
    • 本发明提供了一种适用于使用固态成像装置的图像采集系统的变焦透镜系统,其具有大约三倍的变焦比,小的透镜长度和极好的光学性能。 变焦透镜系统从物体依次包括具有负折光力的第一透镜组,具有正屈光力的第二透镜组和具有正屈光力的第三透镜组。 第一透镜组仅由负透镜和正透镜组成。 第二透镜组包括至少两个正透镜和至少一个负透镜。 第三透镜组由一个透镜组成。 通过减小第一和第二透镜组之间的距离,增加第二和第三透镜组之间的距离以及固定第三透镜组来实现从广角端状态到远摄端状态的放大。 给定条件满意。
    • 46. 发明授权
    • Zoom lens system
    • 变焦镜头系统
    • US06833964B2
    • 2004-12-21
    • US10124271
    • 2002-04-18
    • Keiko MizuguchiAtsushi Shibayama
    • Keiko MizuguchiAtsushi Shibayama
    • G02B15177
    • G02B15/177
    • The present invention provides a zoom lens system suitable for an image gathering system using a solid-state imaging device, having a zoom ratio of about three, a small total lens length, and superb optical performance. According to one aspect, in order from the object side, a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having positive refractive power. Zooming is carried out by varying distances between adjacent lens groups. The first lens group includes two negative lens elements and a positive lens element. The second lens group includes three lens elements consisting of a first positive lens element, a second positive lens element, and a negative lens element. The third lens group includes at least one positive lens element. Predetermined conditional expressions are satisfied.
    • 本发明提供一种适用于使用固态成像装置的图像采集系统的变焦透镜系统,其具有大约三倍的变焦倍数,小的全透镜长度和极好的光学性能。 根据一个方面,从物体侧开始,具有负折光力的第一透镜组,具有正折射光焦度的第二透镜组和具有正折射光焦度的第三透镜组。 通过相邻镜头组之间的距离变化来进行变焦。 第一透镜组包括两个负透镜元件和正透镜元件。 第二透镜组包括由第一正透镜元件,第二正透镜元件和负透镜元件组成的三个透镜元件。 第三透镜组包括至少一个正透镜元件。 满足预定条件表达式。
    • 47. 发明授权
    • Variable focal length lens system and imaging apparatus equipped with thereof
    • 可变焦距透镜系统及其配备的成像装置
    • US06349002B1
    • 2002-02-19
    • US09556327
    • 2000-04-24
    • Atsushi ShibayamaKouichi OshitaKeiko Mizuguchi
    • Atsushi ShibayamaKouichi OshitaKeiko Mizuguchi
    • G02B1514
    • G02B15/177
    • A variable focal length lens system with low cost, suitable for use with a video camera or a digital still camera employing a solid-state imaging device, capable of assembling and adjusting with ease, and to provide an imaging apparatus equipped with the lens system is provided. According to an aspect, it is a variable focal length lens system comprising, in order from an object side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a positive refractive power, wherein the first lens group consists of only one cemented negative lens element, the second lens group comprising at least two positive lens element and at least one negative lens element, and the third lens group consists of a single lens element, and wherein a space between the first and second lens group is decreased and a space between the second and third lens group is increased when a state of the lens group positions is changed from the wide-angle end state to the telephoto end state.
    • 一种低成本的可变焦距透镜系统,适用于采用固态成像装置的摄像机或数码相机,能够轻松进行组装和调整,并提供配备有透镜系统的成像装置, 提供。 根据一个方面,它是一种可变焦距透镜系统,其从物体侧依次包括具有负折光力的第一透镜组,具有正折光力的第二透镜组和具有正折射光焦度的第三透镜组 折射力,其中第一透镜组仅由一个胶合负透镜元件组成,第二透镜组包括至少两个正透镜元件和至少一个负透镜元件,并且第三透镜组由单透镜元件组成,并且其中 当透镜组位置的状态从广角端状态变为远摄端状态时,第一和第二透镜组之间的空间减小,并且第二和第三透镜组之间的空间增大。
    • 49. 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。
    • 50. 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。