JP2014089287A5 - Variable magnification optical system, optical device - Google Patents

Variable magnification optical system, optical device Download PDF

Info

Publication number
JP2014089287A5
JP2014089287A5 JP2012238730A JP2012238730A JP2014089287A5 JP 2014089287 A5 JP2014089287 A5 JP 2014089287A5 JP 2012238730 A JP2012238730 A JP 2012238730A JP 2012238730 A JP2012238730 A JP 2012238730A JP 2014089287 A5 JP2014089287 A5 JP 2014089287A5
Authority
JP
Japan
Prior art keywords
lens group
end state
optical system
lens
distance
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.)
Granted
Application number
JP2012238730A
Other languages
Japanese (ja)
Other versions
JP6299059B2 (en
JP2014089287A (en
Filing date
Publication date
Priority claimed from JP2012238730A external-priority patent/JP6299059B2/en
Priority to JP2012238730A priority Critical patent/JP6299059B2/en
Application filed filed Critical
Priority to PCT/JP2013/079238 priority patent/WO2014069447A1/en
Priority to CN201380057485.1A priority patent/CN104769477B/en
Publication of JP2014089287A publication Critical patent/JP2014089287A/en
Priority to US14/700,276 priority patent/US9874730B2/en
Publication of JP2014089287A5 publication Critical patent/JP2014089287A5/en
Priority to US15/849,594 priority patent/US20180113285A1/en
Publication of JP6299059B2 publication Critical patent/JP6299059B2/en
Application granted granted Critical
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Description

上記課題を解決するために本発明は、
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第４レンズ群と、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、前記第２レンズ群と前記第３レンズ群との間隔、前記第３レンズ群と前記第４レンズ群との間隔、及び前記第４レンズ群と前記第５レンズ群との間隔が変化し、
以下の条件式を満足することを特徴とする変倍光学系を提供する。
０．６５０ ＜ （−ｆ２）／ｆｗ ＜ １．２４０
−０．０５０ ＜ （ｄ３ｔ−ｄ３ｗ）／ｆｗ ＜ ０．７５０
但し、
ｆｗ ：広角端状態における前記変倍光学系の焦点距離
ｆ２ ：前記第２レンズ群の焦点距離
ｄ３ｗ：広角端状態における前記第３レンズ群中の最も像側のレンズ面から前記第４レンズ群中の最も物体側のレンズ面までの距離
ｄ３ｔ：望遠端状態における前記第３レンズ群中の最も像側のレンズ面から前記第４レンズ群中の最も物体側のレンズ面までの距離 In order to solve the above problems, the present invention
In order 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 fourth lens having a positive refractive power A group and a fifth lens group,
Upon zooming, wherein the first lens group distance between the second lens group, wherein the second lens group spacing between the third lens group, a distance between the fourth lens group and the third lens group and, The distance between the fourth lens group and the fifth lens group changes,
A variable magnification optical system characterized by satisfying the following conditional expression is provided.
0.650 <(− f2) / fw <1.240
−0.050 <(d3t−d3w) / fw <0.750
However,
fw: focal length of the variable magnification optical system in the wide-angle end state f2: focal length of the second lens group d3w: in the fourth lens group from the most image side lens surface in the third lens group in the wide-angle end state Distance d3t to the lens surface closest to the object side: distance from the lens surface closest to the object side in the fourth lens group to the lens surface closest to the object side in the fourth lens group in the telephoto end state

Claims (8)

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第４レンズ群と、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、前記第２レンズ群と前記第３レンズ群との間隔、前記第３レンズ群と前記第４レンズ群との間隔、及び前記第４レンズ群と前記第５レンズ群との間隔が変化し、
以下の条件式を満足することを特徴とする変倍光学系。
０．６５０ ＜ （−ｆ２）／ｆｗ ＜ １．２４０
−０．０５０ ＜ （ｄ３ｔ−ｄ３ｗ）／ｆｗ ＜ ０．７５０
但し、
ｆｗ ：広角端状態における前記変倍光学系の焦点距離
ｆ２ ：前記第２レンズ群の焦点距離
ｄ３ｗ：広角端状態における前記第３レンズ群中の最も像側のレンズ面から前記第４レンズ群中の最も物体側のレンズ面までの距離
ｄ３ｔ：望遠端状態における前記第３レンズ群中の最も像側のレンズ面から前記第４レンズ群中の最も物体側のレンズ面までの距離 In order 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 fourth lens having a positive refractive power A group and a fifth lens group,
Upon zooming, wherein the first lens group distance between the second lens group, wherein the second lens group spacing between the third lens group, a distance between the fourth lens group and the third lens group and, The distance between the fourth lens group and the fifth lens group changes,
A zoom optical system characterized by satisfying the following conditional expression:
0.650 <(− f2) / fw <1.240
−0.050 <(d3t−d3w) / fw <0.750
However,
fw: focal length of the variable magnification optical system in the wide-angle end state f2: focal length of the second lens group d3w: in the fourth lens group from the most image side lens surface in the third lens group in the wide-angle end state Distance d3t to the lens surface closest to the object side: distance from the lens surface closest to the object side in the fourth lens group to the lens surface closest to the object side in the fourth lens group in the telephoto end state 広角端状態から望遠端状態への変倍時に、前記第１レンズ群が物体側へ移動することを特徴とする請求項１に記載の変倍光学系。   The zoom optical system according to claim 1, wherein the first lens unit moves toward the object side during zooming from the wide-angle end state to the telephoto end state. 前記第５レンズ群が正の屈折力を有することを特徴とする請求項１又は請求項２に記載の変倍光学系。   The variable power optical system according to claim 1, wherein the fifth lens group has a positive refractive power. 広角端状態から望遠端状態への変倍時に、前記第１レンズ群と前記第２レンズ群との間隔が増加することを特徴とする請求項１から請求項３のいずれか一項に記載の変倍光学系。   4. The distance between the first lens group and the second lens group increases at the time of zooming from the wide-angle end state to the telephoto end state. 5. Variable magnification optical system. 広角端状態から望遠端状態への変倍時に、前記第２レンズ群と前記第３レンズ群との間隔が減少することを特徴とする請求項１から請求項４のいずれか一項に記載の変倍光学系。   5. The distance between the second lens group and the third lens group decreases during zooming from the wide-angle end state to the telephoto end state. 6. Variable magnification optical system. 広角端状態から望遠端状態への変倍時に、前記第４レンズ群と前記第５レンズ群との間隔が増加することを特徴とする請求項１から請求項５のいずれか一項に記載の変倍光学系。   6. The space between the fourth lens group and the fifth lens group increases during zooming from the wide-angle end state to the telephoto end state. 6. Variable magnification optical system. 変倍時に、前記第５レンズ群の位置が固定であることを特徴とする請求項１から請求項６のいずれか一項に記載の変倍光学系。 Upon zooming, zooming optical system according to any one of claims 1 to 6 in which the position of the fifth lens group is equal to or is a fixed. 請求項１から請求項７のいずれか一項に記載の変倍光学系を有することを特徴とする光学装置。   An optical apparatus comprising the variable magnification optical system according to claim 1.
JP2012238730A 2012-10-30 2012-10-30 Variable magnification optical system, optical device Active JP6299059B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2012238730A JP6299059B2 (en) 2012-10-30 2012-10-30 Variable magnification optical system, optical device
PCT/JP2013/079238 WO2014069447A1 (en) 2012-10-30 2013-10-29 Variable magnification optical system, optical device, and production method for variable magnification optical system
CN201380057485.1A CN104769477B (en) 2012-10-30 2013-10-29 The production method of variable magnification optical system, Optical devices and variable magnification optical system
US14/700,276 US9874730B2 (en) 2012-10-30 2015-04-30 Variable magnification optical system, optical device, and production method for variable magnification optical system
US15/849,594 US20180113285A1 (en) 2012-10-30 2017-12-20 Variable magnification optical system, optical device, and production method for variable magnification optical system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012238730A JP6299059B2 (en) 2012-10-30 2012-10-30 Variable magnification optical system, optical device

Publications (3)

Publication Number Publication Date
JP2014089287A JP2014089287A (en) 2014-05-15
JP2014089287A5 true JP2014089287A5 (en) 2015-12-10
JP6299059B2 JP6299059B2 (en) 2018-03-28

Family

ID=50791241

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012238730A Active JP6299059B2 (en) 2012-10-30 2012-10-30 Variable magnification optical system, optical device

Country Status (1)

Country Link
JP (1) JP6299059B2 (en)

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2605386B2 (en) * 1988-12-21 1997-04-30 キヤノン株式会社 Compact zoom lens
JP2917567B2 (en) * 1991-03-29 1999-07-12 キヤノン株式会社 Rear focus zoom lens
JPH0534598A (en) * 1991-08-05 1993-02-12 Konica Corp Compact zoom lens
JPH0735979A (en) * 1993-07-22 1995-02-07 Nikon Corp Zoom lens
JPH11271614A (en) * 1998-03-25 1999-10-08 Nikon Corp Variable focus distance lens system
JP2002098893A (en) * 2000-09-26 2002-04-05 Minolta Co Ltd Imaging lens device
JP2002365548A (en) * 2001-06-06 2002-12-18 Olympus Optical Co Ltd Zoom lens
JP2004117826A (en) * 2002-09-26 2004-04-15 Minolta Co Ltd Imaging apparatus
JP2004264343A (en) * 2003-01-10 2004-09-24 Olympus Corp Electronic image pickup device equipped with zoom lens
JP4630577B2 (en) * 2004-06-07 2011-02-09 キヤノン株式会社 Zoom lens and imaging apparatus having the same
JP4691433B2 (en) * 2004-11-05 2011-06-01 パナソニック株式会社 Lens barrel, imaging device, and camera
JP2007212962A (en) * 2006-02-13 2007-08-23 Matsushita Electric Ind Co Ltd Zoom lens system, lens barrel, imaging apparatus and camera
JP2007334051A (en) * 2006-06-15 2007-12-27 Sony Corp Zoom lens and imaging apparatus
JP5111046B2 (en) * 2007-10-12 2012-12-26 キヤノン株式会社 Zoom lens and imaging apparatus having the same
JP2009169082A (en) * 2008-01-16 2009-07-30 Olympus Imaging Corp Image-forming optical system and electronic imaging device therewith
JP5289795B2 (en) * 2008-02-20 2013-09-11 オリンパスイメージング株式会社 Zoom lens and imaging apparatus using the same
JP2010164606A (en) * 2009-01-13 2010-07-29 Olympus Imaging Corp Zoom lens and imaging apparatus using the same
JP2010002684A (en) * 2008-06-20 2010-01-07 Olympus Imaging Corp Zoom lens and image capturing apparatus using the same
JP2010026293A (en) * 2008-07-22 2010-02-04 Olympus Imaging Corp Image forming optical system and electronic imaging apparatus having the same

Similar Documents

Publication Publication Date Title
JP2009294513A5 (en)
JP2012113285A5 (en)
JP2014203027A5 (en)
JP2014021232A5 (en)
JP2008165143A5 (en)
JP2012242739A5 (en)
JP2013250340A5 (en)
JP2014174524A5 (en)
JP2014126766A5 (en)
JP2015114335A5 (en)
JP2014026264A5 (en)
JP2010160243A5 (en)
JP2015145913A5 (en)
JP2015118141A5 (en)
JP2014098795A5 (en) Variable magnification optical system, optical device
JP2014098794A5 (en) Variable magnification optical system, optical device
JP2015045729A5 (en)
JP2017062302A5 (en)
JP2017049445A5 (en)
JP2016071283A5 (en)
JP2015132637A5 (en)
JP2014026081A5 (en)
JP2016014841A5 (en)
JP2014038236A5 (en)
JP2012150432A5 (en)