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1. 发明授权

US11181722B2 Projection optical system and projector 有权
公开(公告)号：US11181722B2
公开(公告)日：2021-11-23
申请号：US16319528
申请日：2017-07-26
申请人： Konica Minolta, Inc.
发明人： Atsuo Masui , Katsuhiro Takamoto , Yusuke Imai
IPC分类号： G02B3/00 , G02B13/16 , G03B21/14 , G02B15/14
摘要： A projection optical system that projects, while enlarging, an image displayed on an image display surface includes in order from an enlargement side: a first negative refractive power lens group; a second negative refractive power lens group; at least one positive or negative refractive power lens group; a stop; and a first positive refractive power lens group. The projection optical system causes magnification variation by varying distances between lens groups. The at least one positive or negative refractive power lens groups disposed between the second negative refractive power lens group and the stop is movable during the magnification variation. The first positive refractive power lens group is an only lens group that is positioned closer to a reduction side than the stop and is also movable during the magnification variation.

2. 发明申请

US20170075094A1 PROJECTION LENS SYSTEM WITH MAGNIFICATION-VARYING CAPABILITY AND PROJECTOR 有权
标题翻译：具有变形能力和投影机的投影镜头系统
公开(公告)号：US20170075094A1
公开(公告)日：2017-03-16
申请号：US15265468
申请日：2016-09-14
申请人： Konica Minolta, Inc.
发明人： Yusuke Imai , Kazuhiko Inoue
IPC分类号： G02B15/177 , G03B21/14 , G02B5/00 , G02B13/16 , G02B15/20 , G02B27/00
CPC分类号： G02B15/177 , G02B5/005 , G02B13/16 , G02B15/20 , G02B27/0025
摘要： A projection lens system includes a first lens group including a 1a-th lens group having a negative refractive power, a 1b-th lens group having a positive or negative refractive power, and a 1c-th lens group having a positive or negative refractive power. During a zoom, the first lens group remains stationary on an optical axis. During a focus from a remote distance side to a close distance side, the 1a-th lens group remains stationary on the optical axis while the 1b-th and 1c-th lens groups move toward the enlargement conjugate side along different loci respectively. Conditional formula −4.7
摘要翻译：投影透镜系统包括具有负折光力的第1a透镜组的第一透镜组，具有正或负屈光力的第1b透镜组和具有正或负折光力的第1c透镜组。在变焦期间，第一透镜组在光轴上保持静止。在从远距离侧到近距离侧的焦点处，第1a透镜组在光轴上保持静止，而第1b和第1c透镜组分别沿着不同的位置朝向放大共轭侧移动。在远距离和近距离侧都满足条件式-4.7

3. 发明申请

US20210286155A1 PROJECTION OPTICAL SYSTEM AND PROJECTOR 有权
公开(公告)号：US20210286155A1
公开(公告)日：2021-09-16
申请号：US16319528
申请日：2017-07-26
申请人： Konica Minolta, Inc.
发明人： Atsuo Masui , Katsuhiro Takamoto , Yusuke Imai
IPC分类号： G02B13/16 , G02B15/14 , G03B21/14
摘要： A projection optical system that projects, while enlarging, an image displayed on an image display surface includes in order from an enlargement side: a first negative refractive power lens group; a second negative refractive power lens group; at least one positive or negative refractive power lens group; a stop; and a first positive refractive power lens group. The projection optical system causes magnification variation by varying distances between lens groups. The at least one positive or negative refractive power lens groups disposed between the second negative refractive power lens group and the stop is movable during the magnification variation. The first positive refractive power lens group is an only lens group that is positioned closer to a reduction side than the stop and is also movable during the magnification variation.

4. 发明授权

US09575297B2 Projection lens and projector with magnifying function 有权
标题翻译：投影镜头和投影机具有放大功能
公开(公告)号：US09575297B2
公开(公告)日：2017-02-21
申请号：US14950760
申请日：2015-11-24
申请人： KONICA MINOLTA INC.
发明人： Yusuke Imai , Kazuhiko Inoue
IPC分类号： G02B15/14 , G02B15/177
CPC分类号： G02B15/177
摘要： A projection lens includes a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group having negative refractive power, a fourth lens group having negative refractive power, a fifth lens group having positive refractive power, and a sixth lens group having positive refractive power, in sequence from an enlargement conjugate side, the projection lens performing magnification by changing the spacing between the lens groups, wherein at the time of magnification from the telephoto end to the wide-angle end, the second, third, fourth, and fifth lens groups are moved, and an aperture stop is arranged between the surface of the third lens group closest to a reduction conjugate side and the surface of the fifth lens group closest to the enlargement conjugate side.
摘要翻译：投影透镜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，具有负折光力的第三透镜组，具有负屈光力的第四透镜组，具有正屈光力的第五透镜组，以及具有正折射力的第六透镜组，从放大共轭侧开始，投影透镜通过改变透镜组之间的间隔来进行放大，其中在从望远端到广角端的放大倍数为第二透镜组的第二透镜组移动第三，第四和第五透镜组，并且在最靠近缩小共轭侧的第三透镜组的表面与最靠近放大共轭侧的第五透镜组的表面之间布置孔径光阑。

5. 发明授权

US09958655B2 Projection lens system with magnification-varying capability and projector 有权
公开(公告)号：US09958655B2
公开(公告)日：2018-05-01
申请号：US15265468
申请日：2016-09-14
申请人： Konica Minolta, Inc.
发明人： Yusuke Imai , Kazuhiko Inoue
IPC分类号： G02B27/18 , G02B15/177 , G02B15/20 , G02B27/00 , G02B5/00 , G02B13/16
CPC分类号： G02B15/177 , G02B5/005 , G02B13/16 , G02B15/20 , G02B27/0025
摘要： A projection lens system includes a first lens group including a 1a-th lens group having a negative refractive power, a 1b-th lens group having a positive or negative refractive power, and a 1c-th lens group having a positive or negative refractive power. During a zoom, the first lens group remains stationary on an optical axis. During a focus from a remote distance side to a close distance side, the 1a-th lens group remains stationary on the optical axis while the 1b-th and 1c-th lens groups move toward the enlargement conjugate side along different loci respectively. Conditional formula −4.7

6. 发明申请

US20190129285A1 PROJECTION OPTICAL SYSTEM AND PROJECTOR 审中-公开
公开(公告)号：US20190129285A1
公开(公告)日：2019-05-02
申请号：US16099602
申请日：2017-04-20
申请人： Konica Minolta, Inc.
发明人： Atsuo Masui , Kazuhiko Inoue , Yusuke Imai
IPC分类号： G03B21/14 , G03B21/28 , G02B13/04 , G02B13/06 , G02B13/22 , G02B13/00 , G02B13/16 , G02B15/14
摘要： A projection optical system that enlarges an image to be displayed on an image display surface to an angle of view of 70 degrees or more, projects the enlarged image, and includes: a fixed focal length lens that has, in order from an enlargement side, a first optical system and a second optical system on a same optical axis, wherein the second optical system forms an intermediate image of the image, the first optical system enlarges and projects the intermediate image, the projection optical system comprises positive lenses that are positioned on both of the enlargement side and a reduction side of the intermediate image and are adjacent to each other, and following conditional expressions are satisfied: 0.4

7. 发明授权

US10908484B2 Projection optical system and projector 有权
公开(公告)号：US10908484B2
公开(公告)日：2021-02-02
申请号：US16099602
申请日：2017-04-20
申请人： Konica Minolta, Inc.
发明人： Atsuo Masui , Kazuhiko Inoue , Yusuke Imai
IPC分类号： G03B21/14 , G02B13/16 , G02B13/00 , G02B13/04 , G02B13/06 , G02B13/22 , G02B15/14 , G03B21/28
摘要： A projection optical system that enlarges an image to be displayed on an image display surface to an angle of view of 70 degrees or more, projects the enlarged image, and includes: a fixed focal length lens that has, in order from an enlargement side, a first optical system and a second optical system on a same optical axis, wherein the second optical system forms an intermediate image of the image, the first optical system enlarges and projects the intermediate image, the projection optical system comprises positive lenses that are positioned on both of the enlargement side and a reduction side of the intermediate image and are adjacent to each other, and following conditional expressions are satisfied: 0.4

8. 发明授权

US09983392B2 Projection zoom lens and image projection apparatus 有权
公开(公告)号：US09983392B2
公开(公告)日：2018-05-29
申请号：US15450834
申请日：2017-03-06
申请人： KONICA MINOLTA, INC.
发明人： Kazuhiko Inoue , Yusuke Imai
IPC分类号： G02B15/14 , G02B15/177 , G02B13/04 , G02B13/16 , G02B27/00 , G03B21/14
CPC分类号： G02B15/177 , G02B13/04 , G02B13/16 , G02B27/0025 , G03B21/142
摘要： A projection zoom lens includes, sequentially from an enlargement conjugate side: a first lens group having negative refractive power; a second lens group having positive or negative refractive power; a third lens group having positive refractive power; a fourth lens group having negative refractive power; a fifth lens group having positive refractive power; and a sixth lens group having positive refractive power, and configured to perform a magnification variation by changing the interval between the respective lens groups, wherein the fourth lens group includes at least one positive lens and at least one negative lens, at least one of the positive lenses included in the fourth lens group satisfies the following Conditional Expressions: 0.71≤θg_Fp+0.004×νdp≤0.73 and 15≤νdp≤25, and the back focus of the entire projection zoom lenses satisfies the following Conditional Expression 1.0≤BF/Fw≤2.7.

9. 发明授权

US09678412B2 Projection lens system having magnification changing function and projector 有权
公开(公告)号：US09678412B2
公开(公告)日：2017-06-13
申请号：US14655205
申请日：2013-12-25
申请人： KONICA MINOLTA, INC.
发明人： Yusuke Imai , Kazuhiko Inoue
IPC分类号： G03B21/14 , G02B13/16 , G02F1/1335 , G02B27/09 , G02B13/22 , G02B15/177
CPC分类号： G03B21/142 , G02B13/16 , G02B13/22 , G02B15/177 , G02B27/0988 , G02F1/133509 , G03B2205/0046 , G03B2205/0053
摘要： A zoom lens is a projection lens which is composed of a negative first lens group, a negative second lens group, a positive third lens group, a negative fourth lens group, a fifth lens group, and a positive sixth lens group in order from the enlargement conjugate side, and changes magnification by changing the intervals between the lens groups. At least the second, third, and fifth lens groups move when the magnification is changed, and the third lens group moves from the enlargement conjugate side to the reduction conjugate side when the magnification is changed from a telephoto end to a wide angle end. An aperture stop is disposed between the surface closest to the reduction conjugate side of the third lens group and the surface closest to the enlargement conjugate side of the fifth lens group, and is approximately telecentric on the reduction conjugate side.

10. 发明授权

US09285574B2 Variable magnification projection optical system and image projection apparatus 有权
标题翻译：可变放大投影光学系统和图像投影设备
公开(公告)号：US09285574B2
公开(公告)日：2016-03-15
申请号：US14610559
申请日：2015-01-30
申请人： KONICA MINOLTA, INC.
发明人： Kazuhiko Inoue , Yusuke Imai , Katsuhiro Takamoto , Sadanobu Imamura
IPC分类号： G02B15/14 , G02B15/177 , G02B13/16 , G03B21/14
CPC分类号： G02B15/177 , G02B13/16 , G03B21/142
摘要： A variable magnification projection optical system includes, in order from a magnification conjugate side to a reduction conjugate side, a first lens group, a second lens group, a third lens group, a fourth lens group, a fifth lens group, a sixth lens group, and an optical stop which is arranged at any position from a front of a lens arranged closest to the magnification conjugate side in the fourth lens group to a front of a lens arranged closest to the magnification conjugate side in the fifth lens group, wherein the fourth lens group is configured to include, in order from the magnification conjugate side, two or more negative lenses and a positive lens, and wherein the following condition expressions (1), (2) and (3) are satisfied: |Et/ft|≧10 (1) |EW/fW|≧15 (2) 0.87≦23φT/23WT≦1.15 (3).
摘要翻译：可变放大倍率投影光学系统从倍率共轭侧到缩小共轭侧的顺序包括第一透镜组，第二透镜组，第三透镜组，第四透镜组，第五透镜组，第六透镜组以及光学停止器，其布置在从第四透镜组中最靠近倍率共轭侧布置的透镜的前部到最靠近第五透镜组中的倍率共轭侧布置的透镜的前部的任何位置，其中，第四透镜组被配置为从倍率共轭侧依次包括两个或更多个负透镜和正透镜，并且其中满足以下条件表达式（1），（2）和（3）：| Et / ft |≥10（1）| EW / fW |≥15（2）0.87＆nlE; 23＆phgr; T / 23WT＆nlE; 1.15（3）。

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