公开(公告)号：US20180210179A1

公开(公告)日：2018-07-26

申请号：US15927152

申请日：2018-03-21

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Takashi FUJIKURA ,  Kenichi NAGASAWA ,  Masaru MOROOKA

IPC: G02B15/177 ,  G02B5/00 ,  G02B27/00 ,  G02B15/20

CPC classification number: G02B15/177 ,  G02B5/005 ,  G02B15/20 ,  G02B27/0025

Abstract: A zoom lens includes a front unit having a negative refractive power; and a rear unit having a positive refractive power, which includes an aperture stop. The front unit includes a first negative refractive power lens, a second negative refractive power lens, and a third positive refractive power lens. The first lens is nearest to an object, and has a meniscus shape with a convex surface directed toward the object side, and the second lens is on an image side of the first lens, and has a meniscus shape with a convex surface directed toward the object side. The rear unit includes a first lens unit A and a second lens unit B, wherein when zooming from a wide angle end to a telephoto end, a distance between the front unit and the rear unit narrows, and a distance between the first lens unit A and the second lens unit B changes. The first lens unit A includes a first sub-lens unit having a positive refractive power, the aperture stop, and a second sub-lens unit. The second sub-lens unit includes a focusing lens unit, and when focusing, only the focusing lens unit moves along an optical axis, and when zooming, a distance between the first sub-lens unit and the second sub-lens unit changes.

公开(公告)号：US20190317335A1

公开(公告)日：2019-10-17

申请号：US16375548

申请日：2019-04-04

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA

IPC: G02B27/64 ,  G02B7/10 ,  G02B15/173 ,  G03B5/00

Abstract: An image forming optical system includes 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 negative refractive power, and a rear-side lens unit which is disposed nearest to an image. The rear-side lens unit includes a positive lens and a negative lens. The first lens unit and the third lens unit do not move in an optical axis direction. At a time of focusing, the fourth lens unit moves toward the image side. The third lens unit includes a positive lens and a negative lens. A motion blur correction lens unit is disposed in the third lens unit, and the following conditional expressions (1) and (2) are satisfied: 0.59≤|fMF/fMB|≤3.0  (1) 70.0≤νdFFp  (2).

公开(公告)号：US20190033615A1

公开(公告)日：2019-01-31

申请号：US16149345

申请日：2018-10-02

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Yasuharu YAMADA

IPC: G02B27/64 ,  G02B15/173 ,  G02B9/60 ,  G02B15/16

CPC classification number: G02B27/646 ,  G02B9/60 ,  G02B15/16 ,  G02B15/173

Abstract: A zoom lens includes in order from an object 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, and a first lens component in the predetermined lens unit moves perpendicularly with respect to an optical axis and is fixed at the time of zooming, and a second lens component is disposed, leaving an air space on an image side of the first lens component, and a sign of a refractive power of the second lens component differs from a sign of a refractive power of the first lens component, and the following conditional expression (1) is satisfied. 3.4≤|f1/f3|≤9  (1)

公开(公告)号：US20180275381A1

公开(公告)日：2018-09-27

申请号：US15717804

申请日：2017-09-27

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA

IPC: G02B15/163 ,  G02B27/64

CPC classification number: G02B15/163 ,  G02B13/18 ,  G02B15/173 ,  G02B27/646

Abstract: A zoom lens includes in order from an object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a rear-side lens unit, and an aperture stop. The second lens unit includes a first sub-unit having a negative refractive power and a second sub-unit having a negative refractive power, and the rear-side lens unit includes a third lens unit having a positive refractive power which is disposed nearest to object. The first lens unit includes at least a negative lens and a positive lens and the first sub-unit includes at least a negative lens and a positive lens. The third lens unit includes at least two lens components having a positive refractive power, and the following conditional expressions (1) and (2) are satisfied: 61≤νd1G_max_p  (1), and −0.03≤Tp2Ga_min_p≤0.0165  (2).

公开(公告)号：US20180017771A1

公开(公告)日：2018-01-18

申请号：US15717829

申请日：2017-09-27

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Toyoki KON

IPC: G02B15/163 ,  G02B13/00 ,  G02B15/20 ,  G02B27/64

CPC classification number: G02B15/163 ,  G02B13/009 ,  G02B15/173 ,  G02B15/20 ,  G02B27/646

Abstract: A zoom lens includes a front-side lens unit, a rear-side lens unit, and an aperture stop. The front-side lens unit includes either one lens unit having a negative refractive power or two lens units having a negative refractive power, and has a negative refractive power as a whole. The rear-side lens unit is disposed on an image side of the front-side lens unit, and has a positive refractive power as a whole at a telephoto end. The rear-side lens unit includes a plurality of lens units, and includes an object-side positive lens unit having a positive refractive power which is disposed nearest to object and the following conditional expressions (1), (2), and (3) are satisfied: 1.2≦|MGB_t|≦6   (1), 10≦υdGn_min_p≦27   (2), and −0.03≦TpGn_min_p≦0.014   (3).

公开(公告)号：US20180017770A1

公开(公告)日：2018-01-18

申请号：US15717816

申请日：2017-09-27

Applicant: OLYMPUS CORPORATION

Inventor： Toyoki KON ,  Kazuteru KAWAMURA ,  Yasuharu YAMADA ,  Tetsuya YANAI ,  Daichi MURAKAMI

IPC: G02B15/163 ,  G02B13/00 ,  G02B15/20 ,  G02B27/64

Abstract: A zoom lens includes in order from an object 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 negative refractive power, and a fifth lens unit having a positive refractive power. The first lens unit includes a positive lens, and the second lens unit includes a positive lens, and the following conditional expressions (1), (2), (3), and (4) are satisfied: −0.015≦Tp2G_min_p≦0.015  (1), 70.3≦νd1G_max_p  (2), 1.76≦nd2G_max_p≦2.3  (3), and 0.3≦|f2/f3|≦0.9  (4).

公开(公告)号：US20190196157A1

公开(公告)日：2019-06-27

申请号：US16231522

申请日：2018-12-23

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Yasuharu YAMADA ,  Toyoki KON ,  Yuki KUBOTA

IPC: G02B13/02 ,  G02B13/06 ,  G02B27/00 ,  G02B7/04

CPC classification number: G02B13/02 ,  G02B7/04 ,  G02B13/06 ,  G02B27/0025

Abstract: A zoom optical system includes a front-side lens unit, an intermediate lens unit, and a rear-side lens unit. The front-side lens unit includes a first front unit and a second front unit, and a distance between the first front unit and the second front unit is wider at a telephoto end than at a wide angle end. The intermediate lens unit includes a first intermediate unit and a second intermediate unit, and a distance between the first intermediate unit and the second intermediate unit is narrower at the telephoto end than at the wide angle end. A distance between the second intermediate unit and a lens unit adjacent to the second intermediate unit varies. The second intermediate unit moves at the time of focusing, and the following conditional expressions (1) and (2) are satisfied: 0.9≤LTLT/LTLW≤1.17  (1) 4.2≤KMBT≤20.0  (2).

公开(公告)号：US20190170985A1

公开(公告)日：2019-06-06

申请号：US16270369

申请日：2019-02-07

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA

IPC: G02B13/02 ,  G03B13/32 ,  G03B5/00 ,  G02B27/64

Abstract: A telephoto lens includes first, second and third lens units. The first lens unit has positive refractive power front-side lens, first rear-side lens, second rear-side lens units, and one of a plurality of negative lens elements satisfying 0.5≤|f/fLn|≤4.908. The third lens unit has positive and negative lens elements. The first rear-side lens unit includes a predetermined negative lens element. Lens elements of the front-side lens unit include at least one positive lens element. The first and second rear-side lens units have predetermined negative and positive lens elements, and a positive lens element respectively. Conditional Expression 0.247≤ΔGFGR1/f≤0.5 is satisfied. f and fLn are focal lengths of the telephoto lens and predetermined negative lens element. ΔGFGR1 is an axial air space from an object-side surface in the front-side lens unit to similar surface in the first rear-side lens unit.

公开(公告)号：US20170293124A1

公开(公告)日：2017-10-12

申请号：US15479626

申请日：2017-04-05

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA

IPC: G02B15/163 ,  G02B27/00

CPC classification number: G02B15/163 ,  G02B15/173 ,  G02B15/177 ,  G02B27/0025

Abstract: A zoom optical system includes a plurality of lens units, the plurality of lens units consist of lens units having a positive refractive power and lens units having a negative refractive power, and the lens units having a positive refractive power include a positive lens unit and an image-side positive lens unit, the image-side positive lens unit is not moved, in the lens plurality of units, a space between the lens units disposed adjacently is changed at a time of zooming, at a time of focusing, or at a time of zooming and at a time of focusing, the positive lens unit includes a predetermined positive lens satisfying the following Conditional Expression (2), and the following Conditional Expression (1) is satisfied: 0.1≦fGBUN1/fGPM≦2.1  (1), and 60.8≦νdGPMP1≦100.0  (2).

公开(公告)号：US20170293122A1

公开(公告)日：2017-10-12

申请号：US15479714

申请日：2017-04-05

Applicant: OLYMPUS CORPORATION

Inventor： Kazuteru KAWAMURA ,  Koji NAKAGAWA ,  Masahiro IMAMURA

IPC: G02B15/16 ,  G02B27/00 ,  G02B27/64 ,  G02B15/163

CPC classification number: G02B15/16 ,  G02B15/163 ,  G02B15/173 ,  G02B27/0025 ,  G02B27/646

Abstract: A variable magnification optical system includes: in order from an object 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; and an image-side lens unit. The image-side lens unit includes a lens belonging to a first region and a lens belonging to a second region. At a time of changing magnification, the second lens unit and the third lens unit move.