公开(公告)号：US20180011336A1

公开(公告)日：2018-01-11

申请号：US15547690

申请日：2016-03-30

Applicant: CANON KABUSHIKI KAISHA

Inventor： Norihiro Nanba

IPC: G02B27/64 ,  G03B5/02 ,  G02B13/00 ,  G03B5/04 ,  G02B15/20

CPC classification number: G02B27/646 ,  G02B13/009 ,  G02B15/173 ,  G02B15/20 ,  G03B5/02 ,  G03B5/04 ,  G03B2205/0015 ,  G03B2205/0046

Abstract: Provided is a zoom lens, including, in order from an object side: first positive, second negative, third positive lens units, and rear lens group, in which intervals between the first and second lens units, between the second and third lens units, and between the third lens unit and the rear lens group, are respectively is increased, decreased and changed, in which the zoom lens includes an image stabilization unit A configured to move not in an optical axis direction during image blur correction, and an image stabilization unit B configured to rotate around a point on or near the optical axis during the image stabilization, and in which focal lengths of the image stabilization unit B and the zoom lens, maximum value θt of image blur correction angle, and rotation angle of the image stabilization unit B upon the image blur correction angle θt are appropriately set.

公开(公告)号：US09841538B2

公开(公告)日：2017-12-12

申请号：US14969622

申请日：2015-12-15

Applicant: Cooke Optics Ltd.

Inventor： Iain A. Neil

IPC: G02B15/14 ,  G02B13/18 ,  G02B3/06 ,  G02B15/177 ,  G02B7/02 ,  G02B27/00 ,  G02B15/16 ,  G02B13/00 ,  G02B3/04 ,  G02B15/20 ,  G02B13/08

CPC classification number: G02B3/06 ,  G02B3/04 ,  G02B7/028 ,  G02B13/002 ,  G02B13/0045 ,  G02B13/009 ,  G02B13/08 ,  G02B13/18 ,  G02B15/14 ,  G02B15/16 ,  G02B15/177 ,  G02B15/20 ,  G02B27/0025

Abstract: The anamorphic objective zoom lens includes, along an optical axis and in order from an object space to an image space: at least a negative (−) power spherical first lens group; an anamorphic second lens group, spherical third lens group preferably having positive (+) power, a variable power spherical fourth lens group and a positive (+) power spherical fifth lens group. The aperture stop is located before, after or preferably within the spherical fifth lens group. All spherical lens groups contain spherical and piano refractive optical surfaces. The anamorphic second lens group contains cylindrical and plano optical surfaces with at least one cylindrical surface oriented at substantially 90 degrees about at least one other cylindrical surface. The spherical first lens group may provide focusing. The variable power spherical fourth lens group provides zooming. The spherical third and fifth lens groups may provide compensation for thermal defocus.

公开(公告)号：US20170332057A1

公开(公告)日：2017-11-16

申请号：US15522120

申请日：2015-10-30

Applicant: NITTOH INC.

Inventor： Takahiko MATSUO

IPC: H04N9/31 ,  G03B21/14 ,  G02B13/16 ,  G02B15/20 ,  G03B21/28

CPC classification number: H04N9/315 ,  G02B13/16 ,  G02B15/20 ,  G02B17/08 ,  G02B17/0852 ,  G03B21/00 ,  G03B21/14 ,  G03B21/147 ,  G03B21/28 ,  H04N9/3141

Abstract: A projection optical system (10) projects from a first image plane (5) on a reducing side to a second image plane (6) on an enlargement side. The projection optical system (10) includes a first optical system (11) that includes a plurality of lenses and forms a first intermediate image (51) formed inside the first optical system (11) by light incident from the reducing side into a second intermediate image (52) on the enlargement side of the first optical system (11); a second optical system (12) that includes a first reflective surface (M1) with positive refractive power which is positioned further to the enlargement side than the second intermediate image (52); and a glass block (30) that is disposed between the first optical system (11) and the first reflective surface (M1), the glass block (30) passing light rays from the first optical system (11) to the second intermediate image (52).

公开(公告)号：US09810976B2

公开(公告)日：2017-11-07

申请号：US15189564

申请日：2016-06-22

Applicant: SEIKO EPSON CORPORATION

Inventor： Nobutaka Minefuji

IPC: G02B3/00 ,  G02B9/00 ,  G02B17/00 ,  G03B21/14 ,  G02B27/00 ,  G03B21/28 ,  G02B15/16 ,  G02B15/20 ,  G02B7/04 ,  G03B21/00 ,  H04N9/31 ,  G02B3/02 ,  G02B13/00 ,  G02B17/08 ,  G02B13/16 ,  G02B15/14 ,  G02B13/22 ,  G03B5/00 ,  G02B5/00 ,  G02B13/18 ,  G03B17/54

CPC classification number: G03B21/147 ,  G02B3/02 ,  G02B5/005 ,  G02B7/04 ,  G02B13/0045 ,  G02B13/0065 ,  G02B13/009 ,  G02B13/16 ,  G02B13/18 ,  G02B13/22 ,  G02B15/14 ,  G02B15/161 ,  G02B15/20 ,  G02B17/08 ,  G02B17/0816 ,  G02B17/0852 ,  G02B17/0896 ,  G02B27/0025 ,  G03B5/00 ,  G03B17/54 ,  G03B21/006 ,  G03B21/28 ,  H04N9/315

Abstract: The 1-2nd lens group is divided into three lens groups which move when focusing is performed during the magnification change. Even in a case in which the second optical group is formed of one mirror, it is possible for a primary image to contain appropriate aberration and to hereby reduce aberration of an image which is finally projected onto a screen through the second optical group.

公开(公告)号：US09810889B2

公开(公告)日：2017-11-07

申请号：US14635195

申请日：2015-03-02

Applicant: FUJIFILM Corporation

Inventor： Tetsuya Ori ,  Michio Cho

IPC: G02B27/64 ,  G02B15/14 ,  G02B15/163 ,  G02B15/173 ,  G02B15/20

CPC classification number: G02B15/163 ,  G02B15/173 ,  G02B15/20 ,  G02B27/646

Abstract: A zoom lens consists of a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having positive refractive power, and a fifth lens group having positive refractive power in this order from an object side. The third lens group consists of a 3-1st lens group having positive refractive power and a 3-2nd lens group having negative refractive power in this order from the object side. A hand shake blur is corrected by moving the 3-2nd lens group in a direction perpendicular to optical axis. Magnification is changed by changing distances between the lens groups while the fifth lens group is fixed.

公开(公告)号：US09753263B2

公开(公告)日：2017-09-05

申请号：US14855851

申请日：2015-09-16

Applicant: HANWHA TECHWIN CO., LTD.

Inventor： Jiyeong Yoo

IPC: G02B15/177 ,  G02B5/20 ,  G02B15/163 ,  G02B15/20 ,  G02B15/16 ,  G02B13/14

CPC classification number: G02B15/177 ,  G02B5/208 ,  G02B13/146 ,  G02B15/161 ,  G02B15/163 ,  G02B15/20

Abstract: A zoom lens system includes: a first lens group having a negative refractive power; a second lens group having a positive refractive power; and an aperture between the first and second lens groups, wherein the first lens group and the second lens group are sequentially arranged from an object side to an image side, wherein the zoom lens system performs zooming and focusing by moving the second and first lens groups, respectively, along an optical axis, and satisfies 2.5

公开(公告)号：US20170242227A1

公开(公告)日：2017-08-24

申请号：US15419143

申请日：2017-01-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TAKAHIRO KITADA ,  SHUNICHIRO YOSHINAGA ,  TAKAKAZU BITO

IPC: G02B15/163 ,  H04N5/225 ,  G02B15/20 ,  G02B27/64

CPC classification number: G02B15/163 ,  G02B15/173 ,  G02B15/20 ,  G02B15/22 ,  G02B27/646

Abstract: The zoom lens system includes a first lens group with positive power, a second lens group with negative power, a third lens group with positive power, a fourth lens group with negative power, and a fifth lens group with positive power. An aperture stop is provided between the second and the third lens groups. The third lens group includes lens element L3a and L3b with positive power, lens element L3c with negative power, and lens element L3d with positive power. The lens elements L3c and L3d are cemented. The lens element L3b corrects image blurring. The fourth lens group moves when focusing. When zooming, the first to the fourth lens group move.Here, condition (1) below is satisfied. 0.24

公开(公告)号：US20170242226A1

公开(公告)日：2017-08-24

申请号：US15590638

申请日：2017-05-09

Applicant: Takashi KUBOTA

Inventor： Takashi KUBOTA

IPC: G02B13/22 ,  G02B15/20 ,  G02B15/177

CPC classification number: G02B13/22 ,  G02B15/14 ,  G02B15/177 ,  G02B15/20 ,  G03B21/14

Abstract: A projection zoom lens constituting a projection optical system of a projector, which projects an image displayed on a surface of an image display element on a projected surface, so as to magnify and display the image includes, in order from the projected surface side to the image display element side, a first lens group having a negative refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a fifth lens group, wherein a refractive power of the fifth lens group is weaker than the refractive power of the first lens group, the refractive power of the second lens group, the refractive power of the third lens group, and the refractive power of the fourth lens group.

公开(公告)号：US09696529B2

公开(公告)日：2017-07-04

申请号：US15194964

申请日：2016-06-28

Applicant: CANON KABUSHIKI KAISHA

Inventor： Suguru Inoue

IPC: G02B15/14 ,  G02B15/20 ,  G02B7/105 ,  G02B9/62 ,  G02B27/00 ,  G02B9/60

CPC classification number: G02B15/20 ,  G02B7/105 ,  G02B9/60 ,  G02B9/62 ,  G02B15/173 ,  G02B27/0025

Abstract: A zoom lens includes, in order from an object side to an image side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; a fourth lens unit having a positive refractive power; and a fifth lens unit having a negative refractive power, in which: at a telephoto end as compared to a wide angle end, an interval between first lens unit and second lens unit is increased, and an interval between second lens unit and third lens unit is decreased; an interval between each pair of adjacent lens units is changed during zooming; and focal lengths of a focusing mechanism and the third lens unit, a movement amount of the fifth lens unit during zooming from the wide angle end to the telephoto end, and other factors are appropriately set.

公开(公告)号：US20170123194A1

公开(公告)日：2017-05-04

申请号：US15340500

申请日：2016-11-01

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tomonori Kimura

IPC: G02B15/20 ,  G02B27/00 ,  G02B7/10

CPC classification number: G02B15/20 ,  G02B7/10 ,  G02B15/173 ,  G02B27/0025

Abstract: A zoom lens has, in order from an object side to an image side, a positive first lens unit, a negative second lens unit, a positive third lens unit, a positive fourth lens unit, and a fifth lens unit. In the zoom lens, the loci of the lens units moving for zooming are set appropriately, and a reflector for bending an optical path is placed at an appropriate position within the fifth lens unit.