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1. 发明授权

US11280986B2 Zoom lens, projection display device, and imaging apparatus for forming an intermediate image 有权
公开(公告)号：US11280986B2
公开(公告)日：2022-03-22
申请号：US16686246
申请日：2019-11-18
申请人： FUJIFILM Corporation
发明人： Masaru Amano , Akiko Nagahara , Yukiko Nagatoshi , Kazuki Inoue
IPC分类号： G02B23/14 , G02B15/14 , G02B13/16
摘要： A zoom lens forms an intermediate image at a position conjugate to a reduction side imaging plane and forms the intermediate image again on a magnification side imaging plane. The zoom lens includes a plurality of lens groups including at least two movable lens groups, which move by changing spacings between the groups adjacent to each other in a direction of an optical axis during zooming, at a position closer to the reduction side than the intermediate image. Among the plurality of lens groups, a final lens group closest to the reduction side has a positive refractive power, and remains stationary with respect to the reduction side imaging plane during zooming. The zoom lens satisfies predetermined conditional expressions (1) and (2) about the focal lengths of the movable lens groups.

2. 发明授权

US10101641B2 Zoom lens, projection display device, and imaging apparatus 有权
公开(公告)号：US10101641B2
公开(公告)日：2018-10-16
申请号：US15687770
申请日：2017-08-28
申请人： FUJIFILM Corporation
发明人： Yukiko Nagatoshi , Kazuki Inoue , Akiko Nagahara
IPC分类号： G03B21/14 , G02B13/00 , G02B13/18 , G02B15/16 , H04N5/225
摘要： Provided are a zoom lens, a projection display device including the zoom lens, and an imaging apparatus including the zoom lens. The zoom lens forms an intermediate image at a position conjugate to a reduction side imaging plane and forms the intermediate image again on a magnification side imaging plane. The zoom lens includes: a first optical system on the magnification side; and a second optical system on the reduction side. The intermediate image is formed between the magnification side and the reduction side. The second optical system includes two movable lens groups, which move by changing spacings between the groups adjacent to each other in a direction of an optical axis during zooming, and two stationary lens groups which remain stationary with respect to the reduction side imaging plane during zooming. One stationary lens group is disposed to be closest to the reduction side, and has a positive refractive power.

3. 发明授权

US09739989B2 Projection zoom lens and projection type display device 有权
公开(公告)号：US09739989B2
公开(公告)日：2017-08-22
申请号：US14821009
申请日：2015-08-07
申请人： FUJIFILM Corporation
发明人： Akiko Nagahara
IPC分类号： G02B15/14 , G02B15/177 , G02B27/00 , H04N9/31
CPC分类号： G02B15/177 , G02B27/0025 , H04N9/317
摘要： A projection zoom lens is essentially constituted by, in order from the magnification side: a negative first lens group, which is fixed when changing magnification; a positive second lens group, which moves when changing magnification; a plurality of other lens groups; and a final lens group, which is fixed when changing magnification. The distances among all adjacent lens groups change when changing magnification. The first through third lenses from the magnification side within the first lens group are a first single lens having an aspherical surface with a concave surface toward the magnification side and a negative refractive power in the paraxial region, a second single lens having an aspherical surface, and a third lens. A first lens group front group constituted by the first through third lenses has a negative refractive power. Predetermined conditional formulae are satisfied.

4. 发明授权

US09664884B2 Projection zoom lens and projection type display device 有权
公开(公告)号：US09664884B2
公开(公告)日：2017-05-30
申请号：US14824473
申请日：2015-08-12
申请人： FUJIFILM Corporation
发明人： Akiko Nagahara , Michio Cho
IPC分类号： G02B13/16 , G02B13/04 , G02B15/177 , G02B15/14 , G02B15/163 , G02B15/24
CPC分类号： G02B13/16 , G02B13/04 , G02B15/14 , G02B15/163 , G02B15/177 , G02B15/24
摘要： A projection zoom lens is essentially constituted by, in order from the magnification side: a negative first lens group; a positive second lens group; a third lens group; a positive fourth lens group; a fifth lens group; and a positive sixth lens group. The distance between the first and second lens groups is shorter, the distance between the second and third lens groups is longer, the distance between the third and fourth lens groups is shorter, the distance between the fourth and the fifth lens groups is longer, and the distance between the fifth and sixth lens groups is longer at the telephoto end than at the wide angle end. A lens having a negative refractive power in the paraxial region is provided most toward the magnification side in the first lens group. The fifth lens group has a negative lens.

5. 发明授权

US08896929B2 Projection zoom lens and projection type display device 有权
标题翻译：投影变焦镜头和投影型显示装置
公开(公告)号：US08896929B2
公开(公告)日：2014-11-25
申请号：US14263312
申请日：2014-04-28
申请人： FUJIFILM Corporation
发明人： Tomoyuki Baba , Masaru Amano , Akiko Nagahara
IPC分类号： G02B15/14 , G02B15/177 , G02B15/04 , G02B13/00
CPC分类号： G02B15/177 , G02B13/009 , G02B15/04 , G02B15/14
摘要： A negative first lens group, a positive second lens group, a negative third lens group, a positive fourth lens group, a negative fifth lens group, and a positive sixth lens group are disposed in this order from the magnification side. The reduction side is made telecentric. While changing magnification, the second lens group through the fifth lens group are moved, and the first lens group and the sixth lens group are fixed. Predetermined conditional expressions are satisfied.
摘要翻译：从倍率侧依次配置负第1透镜组，正第2透镜组，负第3透镜组，正第4透镜组，负第5透镜组，正第六透镜组。减速侧是远心的。在改变倍率的同时，通过第五透镜组移动第二透镜组，并且固定第一透镜组和第六透镜组。满足预定条件表达式。

6. 发明授权

US10527828B2 Zoom lens, projection display device, and imaging apparatus for forming an intermediate image 有权
公开(公告)号：US10527828B2
公开(公告)日：2020-01-07
申请号：US15687729
申请日：2017-08-28
申请人： FUJIFILM Corporation
发明人： Masaru Amano , Akiko Nagahara , Yukiko Nagatoshi , Kazuki Inoue
IPC分类号： G02B23/14 , G02B15/167 , G02B13/16 , G02B15/14
摘要： A zoom lens forms an intermediate image at a position conjugate to a reduction side imaging plane and forms the intermediate image again on a magnification side imaging plane. The zoom lens includes a plurality of lens groups including at least two movable lens groups, which move by changing spacings between the groups adjacent to each other in a direction of an optical axis during zooming, at a position closer to the reduction side than the intermediate image. Among the plurality of lens groups, a final lens group closest to the reduction side has a positive refractive power, and remains stationary with respect to the reduction side imaging plane during zooming. The zoom lens satisfies predetermined conditional expressions (1) and (2) about the focal lengths of the movable lens groups.

7. 发明授权

US09250427B2 Projection lens and projection display apparatus 有权
标题翻译：投影镜头和投影显示装置
公开(公告)号：US09250427B2
公开(公告)日：2016-02-02
申请号：US14288421
申请日：2014-05-28
申请人： FUJIFILM Corporation
发明人： Akiko Nagahara
IPC分类号： G02B3/00 , G02B15/14 , G02B3/02 , G02B13/18 , G02B9/62 , G02B15/177 , G02B13/16 , G02B27/00 , G02B13/04 , G02B15/20 , G02B13/00
CPC分类号： G02B15/177 , G02B9/62 , G02B13/0045 , G02B13/009 , G02B13/04 , G02B13/16 , G02B13/18 , G02B15/20 , G02B27/0025
摘要： A projection lens is provided having a positive refractive power as a whole and including a correction group consisting of a plurality of lens groups that corrects field curvature by moving in an optical axis direction and changing the distance between each lens group. The conjugation length of a combined optical system combining the most magnification side lens group constituting the correction group to the most reduction side lens group constituting the correction group in the projection lens is constant before and after the movement of the correction group for correcting field curvature. If the projection lens is variable in magnification or focusable by moving at least some of the lens groups, the movement of the correction group for correcting field curvature is allowed to be performed independently of the movement for either changing magnification or focusing.
摘要翻译：提供了具有整个正屈光力的投影透镜，并且包括由多个透镜组组成的校正组，该透镜组通过沿光轴方向移动来校正场曲率并改变每个透镜组之间的距离。组合光学系统的组合光学系统在构成校正组的最大放大率侧透镜组与构成投影透镜中的校正组的最大减少侧透镜组的共轭长度在用于校正场曲率的校正组的移动之前和之后是恒定的。如果投影透镜通过移动至少一些透镜组而具有可变的放大倍率或可调焦度，则可以独立于用于改变倍率或聚焦的移动来执行用于校正视场曲率的校正组的移动。

8. 发明授权

US08976455B2 Variable-magnification projection optical system and projection display device 有权
标题翻译：可变放大投影光学系统和投影显示装置
公开(公告)号：US08976455B2
公开(公告)日：2015-03-10
申请号：US14142040
申请日：2013-12-27
申请人： Fujifilm Corporation
发明人： Akiko Nagahara , Yukiko Nagatoshi
IPC分类号： G02B15/14 , G02B3/00 , G02B9/00 , G02B13/18
CPC分类号： G02B13/22 , G02B15/177
摘要： A variable-magnification projection optical system substantially consists of a negative first lens group that is disposed at the most enlargement-side position and is fixed during magnification change, a positive last lens group that is disposed at the most reduction-side position and is fixed during magnification change, and a plurality of lens groups that are disposed between the first lens group and last lens group and are moved during magnification change. The most enlargement-side lens group (the second lens group) of the lens groups that are moved during magnification change has a negative refractive power. Predetermined conditional expressions relating to a back focus of the entire system on the reduction side at the wide-angle end, a focal length of the entire system at the wide-angle end, a focal length of the second lens group and a focal length of the last lens group are satisfied.
摘要翻译：一种可变放大投影光学系统，其基本上由设置在最大放大侧位置并在倍率变化期间固定的负第一透镜组，设置在最大减少侧位置并固定的最后一个透镜组以及设置在第一透镜组和最后一个透镜组之间并且在放大变化期间移动的多个透镜组。在放大变化期间移动的透镜组的最大放大侧透镜组（第二透镜组）具有负折光力。与广角端的减小侧的整个系统的后焦点相关的预定条件表达式，广角端的整个系统的焦距，第二透镜组的焦距和焦距最后一个镜头组满意。

9. 发明授权

US11320635B2 Imaging optical system, projection type display device, and imaging apparatus 有权
公开(公告)号：US11320635B2
公开(公告)日：2022-05-03
申请号：US16998541
申请日：2020-08-20
申请人： FUJIFILM Corporation
发明人： Yukiko Nagatoshi , Akiko Nagahara , Masaru Amano
IPC分类号： G02B3/00 , G02B13/16 , G02B17/08 , G03B21/28 , G02B13/22 , G02B27/00
摘要： The imaging optical system forms a first intermediate image at a position conjugate to a magnification side imaging surface and a second intermediate image at a position closer to a reduction side than the first intermediate image on an optical path and conjugate to the first intermediate image. The imaging optical system consists of a first optical system, a second optical system, and a third optical system in order from the magnification side to the reduction side along the optical path. The imaging optical system does not include a reflective member having a power.

10. 发明授权

US09739985B2 Projection lens and projection display apparatus 有权
公开(公告)号：US09739985B2
公开(公告)日：2017-08-22
申请号：US14690598
申请日：2015-04-20
申请人： FUJIFILM Corporation
发明人： Tomoyuki Baba , Yukiko Nagatoshi , Masanao Kawana , Masaru Amano , Akiko Nagahara
IPC分类号： G02B9/00 , G02B13/18 , G02B13/16 , G02B15/177 , G02B3/02
CPC分类号： G02B13/18 , G02B3/02 , G02B13/16 , G02B15/177
摘要： A projection lens includes a compound aspherical lens in which a resin layer is formed on a surface of a glass lens and a lens surface of the resin layer on the air contacting surface side has an aspherical shape. If the glass transition temperature of the resin layer is taken as Tg and its unit is taken as ° C., Tg of at least one of the resin layers is 150

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