JP2022024121A5 - - Google Patents

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Publication number
JP2022024121A5
JP2022024121A5 JP2021189286A JP2021189286A JP2022024121A5 JP 2022024121 A5 JP2022024121 A5 JP 2022024121A5 JP 2021189286 A JP2021189286 A JP 2021189286A JP 2021189286 A JP2021189286 A JP 2021189286A JP 2022024121 A5 JP2022024121 A5 JP 2022024121A5
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JP
Japan
Prior art keywords
lens group
optical system
variable magnification
magnification optical
focal length
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2021189286A
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Japanese (ja)
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JP2022024121A (en
Filing date
Publication date
Priority claimed from JP2019540732A external-priority patent/JP6988900B2/en
Application filed filed Critical
Priority to JP2021189286A priority Critical patent/JP2022024121A/en
Publication of JP2022024121A publication Critical patent/JP2022024121A/en
Publication of JP2022024121A5 publication Critical patent/JP2022024121A5/ja
Pending legal-status Critical Current

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Claims (10)

物体側から順に、正の屈折力を有する第1レンズ群と、負の屈折力を有する第2レンズ群と、正の屈折力を有する第3レンズ群と、正の屈折力を有する後続レンズ群とからなり
前記後続レンズ群は、物体側から順に、第4レンズ群と、負の屈折力を有する第5レンズ群とを有し、
変倍時に、前記第1レンズ群と前記第2レンズ群との間隔が変化し、前記第2レンズ群と前記第3レンズ群との間隔が変化し、前記第3レンズ群と前記後続レンズ群との間隔が変化し、前記後続レンズ群の隣り合うレンズ群の間隔が変化し、
変倍時に、前記第1レンズ群は移動し、
焦時に移動する合焦レンズ群は、前記後続レンズ群に含まれ
以下の条件式を満足する変倍光学系。
0.040 < βFw < 0.800
0.100 <BFw/fw < 1.00
但し、
βFw:広角端状態における前記合焦レンズ群の横倍率
BFw:広角端状態における前記変倍光学系のバックフォーカス
fw:広角端状態における前記変倍光学系の焦点距離
From the object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a subsequent lens group having a positive refractive power. It consists of
The subsequent lens group has a fourth lens group and a fifth lens group having a negative refractive power in order from the object side.
At the time of scaling, the distance between the first lens group and the second lens group changes, the distance between the second lens group and the third lens group changes, and the third lens group and the subsequent lens group change. The distance between the lens and the lens changes, and the distance between adjacent lens groups of the subsequent lens group changes.
At the time of scaling, the first lens group moves,
The in- focus lens group that moves during in-focus is included in the subsequent lens group, and is included in the subsequent lens group .
A variable magnification optical system that satisfies the following conditional expression.
0.040 <βFw <0.800
0.100 <BFw / fw <1.00
however,
βFw: Lateral magnification of the in-focus lens group in the wide-angle end state BFw: Back focus of the variable magnification optical system in the wide-angle end state fw: Focal length of the variable magnification optical system in the wide-angle end state
以下の条件式を満足する請求項1に記載の変倍光学系。The variable magnification optical system according to claim 1, which satisfies the following conditional expression.
-3.000 < f5/f3 < -0.500-3.00 <f5 / f3 <-0.500
但し、however,
f3:前記第3レンズ群の焦点距離 f3: Focal length of the third lens group
f5:前記第5レンズ群の焦点距離 f5: Focal length of the fifth lens group
前記後続レンズ群は、物体側から順に、前記第4レンズ群と、前記第5レンズ群と、第6レンズ群とからなり、The subsequent lens group includes the fourth lens group, the fifth lens group, and the sixth lens group in order from the object side.
変倍時に、前記第6レンズ群は移動しない請求項1または2に記載の変倍光学系。 The variable magnification optical system according to claim 1 or 2, wherein the sixth lens group does not move at the time of magnification change.
前記合焦レンズ群は、前記第4レンズ群または前記第4レンズ群の一部のレンズである請求項1から3の何れか一項に記載の変倍光学系。The variable magnification optical system according to any one of claims 1 to 3, wherein the in-focus lens group is a lens of the fourth lens group or a part of the fourth lens group. 前記第3レンズ群は、最も物体側に、物体側に凸面を向けた正メニスカスレンズを備える請求項1から4の何れか一項に記載の変倍光学系。The variable magnification optical system according to any one of claims 1 to 4, wherein the third lens group includes a positive meniscus lens having a convex surface facing the object side on the most object side. 以下の条件式を満足する請求項1から5の何れか一項に記載の変倍光学系。The variable magnification optical system according to any one of claims 1 to 5, which satisfies the following conditional expression.
4.000 < f1/f1Rw < 9.0004.000 <f1 / f1Rw <9000
但し、however,
f1:前記第1レンズ群の焦点距離 f1: Focal length of the first lens group
f1Rw:前記第1レンズ群より像面側に配置されたレンズ群の広角端状態における合成焦点距離 f1Rw: Combined focal length in the wide-angle end state of the lens group arranged on the image plane side of the first lens group.
以下の条件式を満足する請求項1から6の何れか一項に記載の変倍光学系。The variable magnification optical system according to any one of claims 1 to 6, which satisfies the following conditional expression.
0.500 < 1/βRw < 1.0000.500 <1 / βRw <1,000
但し、however,
βRw:広角端状態における最も像面側に配置されたレンズ群の横倍率 βRw: Lateral magnification of the lens group placed closest to the image plane in the wide-angle end state
以下の条件式を満足する請求項1から7の何れか一項に記載の変倍光学系。The variable magnification optical system according to any one of claims 1 to 7, which satisfies the following conditional expression.
0.500 < f2fn/f2 < 1.1000.500 <f2fn / f2 <1.10
但し、however,
f2fn:前記第2レンズ群内の最も物体側のレンズ成分の焦点距離 f2fn: Focal length of the lens component on the most object side in the second lens group
f2:前記第2レンズ群の焦点距離 f2: Focal length of the second lens group
以下の条件式を満足する請求項1から8の何れか一項に記載の変倍光学系。The variable magnification optical system according to any one of claims 1 to 8, which satisfies the following conditional expression.
0.300 < fF/ft < 1.4000.300 <fF / ft <1.400
但し、however,
fF:前記合焦レンズ群の焦点距離 fF: Focal length of the focusing lens group
ft:望遠端状態における前記変倍光学系の焦点距離 ft: Focal length of the variable magnification optical system in the telephoto end state
以下の条件式を満足する請求項1から9の何れか一項に記載の変倍光学系。The variable magnification optical system according to any one of claims 1 to 9, which satisfies the following conditional expression.
40.00° < ωw < 85.00°40.00 ° <ωw <85.00 °
但し、however,
ωw:広角端状態における前記変倍光学系の半画角 ωw: Half angle of view of the variable magnification optical system in the wide-angle end state
JP2021189286A 2017-09-11 2021-11-22 Zoom optical system, optical device, and method of manufacturing zoom optical system Pending JP2022024121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021189286A JP2022024121A (en) 2017-09-11 2021-11-22 Zoom optical system, optical device, and method of manufacturing zoom optical system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2019540732A JP6988900B2 (en) 2017-09-11 2017-09-11 Magnification optical system, optical device, and manufacturing method of variable magnification optical system
PCT/JP2017/032695 WO2019049372A1 (en) 2017-09-11 2017-09-11 Variable magnification optical system, optical device, and production method for variable magnification optical system
JP2021189286A JP2022024121A (en) 2017-09-11 2021-11-22 Zoom optical system, optical device, and method of manufacturing zoom optical system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2019540732A Division JP6988900B2 (en) 2017-09-11 2017-09-11 Magnification optical system, optical device, and manufacturing method of variable magnification optical system

Publications (2)

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JP2022024121A JP2022024121A (en) 2022-02-08
JP2022024121A5 true JP2022024121A5 (en) 2022-07-06

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JP2019540732A Active JP6988900B2 (en) 2017-09-11 2017-09-11 Magnification optical system, optical device, and manufacturing method of variable magnification optical system
JP2021189286A Pending JP2022024121A (en) 2017-09-11 2021-11-22 Zoom optical system, optical device, and method of manufacturing zoom optical system

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Application Number Title Priority Date Filing Date
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JP (2) JP6988900B2 (en)
WO (1) WO2019049372A1 (en)

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JP2011022191A (en) * 2009-07-13 2011-02-03 Sony Corp Zoom lens and imaging apparatus
JP5544827B2 (en) * 2009-11-04 2014-07-09 株式会社ニコン Variable magnification optical system, optical device
US8339713B2 (en) * 2009-11-04 2012-12-25 Nikon Corporation Zoom optical system, optical apparatus and method for manufacturing zoom optical system
JP5474501B2 (en) * 2009-11-12 2014-04-16 オリンパス株式会社 Imaging optical system and electronic imaging apparatus having the same
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