JP2014089290A5 - Variable magnification optical system, optical device - Google Patents

Variable magnification optical system, optical device Download PDF

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Publication number
JP2014089290A5
JP2014089290A5 JP2012238733A JP2012238733A JP2014089290A5 JP 2014089290 A5 JP2014089290 A5 JP 2014089290A5 JP 2012238733 A JP2012238733 A JP 2012238733A JP 2012238733 A JP2012238733 A JP 2012238733A JP 2014089290 A5 JP2014089290 A5 JP 2014089290A5
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lens group
lens
end state
optical system
distance
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JP6326712B2 (en
JP2014089290A (en
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Priority claimed from JP2012238733A external-priority patent/JP6326712B2/en
Priority to PCT/JP2013/079239 priority patent/WO2014069448A1/en
Priority to CN201380057327.6A priority patent/CN104755986B/en
Publication of JP2014089290A publication Critical patent/JP2014089290A/en
Priority to US14/700,398 priority patent/US9453993B2/en
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上記課題を解決するため、本発明は、
物体側から順に、正屈折力の第１レンズ群と、負屈折力の第２レンズ群と、正屈折力の第３レンズ群と、正屈折力の第４レンズ群と、正屈折力の第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、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。
７．６０ ＜ ｆ５／ｆｗ ＜ ４５．００
０．４３０ ＜ （ｄ４ｉｔ−ｄ４ｉｗ）／ｆ４ ＜ ０．７００
但し、
ｆｗ：前記変倍光学系の広角端状態における全系焦点距離、
ｆ４：前記第４レンズ群の焦点距離、
ｆ５：前記第５レンズ群の焦点距離、
ｄ４ｉｗ：広角端状態における前記第４レンズ群の最も像側のレンズ面から像面までの光軸上の距離、
ｄ４ｉｔ：望遠端状態における前記第４レンズ群の最も像側のレンズ面から像面までの光軸上の距離。 In order to solve the above problems, the present invention provides:
In order from the object side, a first lens unit having a positive 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 first lens unit having a positive refractive power. 5 lens groups,
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, wherein The distance between the fourth lens group and the fifth lens group changes,
A zoom optical system characterized by satisfying the following conditional expression:
7.60 <f5 / fw <45.00
0.430 <(d4it-d4iw) / f4 <0.700
However,
fw: the total focal length in the wide-angle end state of the variable magnification optical system,
f4: focal length of the fourth lens group,
f5: focal length of the fifth lens group,
d4iw: the distance on the optical axis from the lens surface closest to the image side to the image plane in the fourth lens group in the wide-angle end state;
d4it: distance on the optical axis from the most image side lens surface of the fourth lens group to the image surface in the telephoto end state.

Claims (9)

物体側から順に、正屈折力の第１レンズ群と、負屈折力の第２レンズ群と、正屈折力の第３レンズ群と、正屈折力の第４レンズ群と、正屈折力の第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、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。
７．６０ ＜ ｆ５／ｆｗ ＜ ４５．００
０．４３０ ＜ （ｄ４ｉｔ−ｄ４ｉｗ）／ｆ４ ＜ ０．７００
但し、
ｆｗ：前記変倍光学系の広角端状態における全系焦点距離、
ｆ４：前記第４レンズ群の焦点距離、
ｆ５：前記第５レンズ群の焦点距離、
ｄ４ｉｗ：広角端状態における前記第４レンズ群の最も像側のレンズ面から像面までの光軸上の距離、
ｄ４ｉｔ：望遠端状態における前記第４レンズ群の最も像側のレンズ面から像面までの光軸上の距離。 In order from the object side, a first lens unit having a positive 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 first lens unit having a positive refractive power. 5 lens groups,
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, wherein The distance between the fourth lens group and the fifth lens group changes,
A zoom optical system characterized by satisfying the following conditional expression:
7.60 <f5 / fw <45.00
0.430 <(d4it-d4iw) / f4 <0.700
However,
fw: the total focal length in the wide-angle end state of the variable magnification optical system,
f4: focal length of the fourth lens group,
f5: focal length of the fifth lens group,
d4iw: the distance on the optical axis from the lens surface closest to the image side to the image plane in the fourth lens group in the wide-angle end state;
d4it: distance on the optical axis from the most image side lens surface of the fourth lens group to the image surface in the telephoto end state. 以下の条件式を満足することを特徴とする請求項１に記載の変倍光学系。
０．４１０ ＜ ｆ３／ｆ４ ＜ １．０００
但し、
ｆ３：前記第３レンズ群の焦点距離、
ｆ４：前記第４レンズ群の焦点距離。 The variable magnification optical system according to claim 1, wherein the following conditional expression is satisfied.
0.410 <f3 / f4 <1.00
However,
f3: focal length of the third lens group,
f4: focal length of the fourth lens group. 以下の条件式を満足することを特徴とする請求項１または２に記載の変倍光学系。
−０．０５０ ＜ （ｄ３ｔ−ｄ３ｗ）／ｆｗ ＜ ０．７５０
但し、
ｆｗ：前記変倍光学系の広角端状態における全系焦点距離、
ｄ３ｗ：広角端状態における前記第３レンズ群の最も像側のレンズ面から前記第４レンズ群の最も物体側のレンズ面までの光軸上の距離、
ｄ３ｔ：望遠端状態における前記第３レンズ群の最も像側のレンズ面から前記第４レンズ群の最も物体側のレンズ面までの光軸上の距離。 The variable magnification optical system according to claim 1, wherein the following conditional expression is satisfied.
−0.050 <(d3t−d3w) / fw <0.750
However,
fw: the total focal length in the wide-angle end state of the variable magnification optical system,
d3w: the distance on the optical axis from the most image side lens surface of the third lens group to the most object side lens surface of the fourth lens group in the wide-angle end state;
d3t: Distance on the optical axis from the most image side lens surface of the third lens group to the most object side lens surface of 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レンズ群は物体側へ移動することを特徴とする請求項１から３のいずれか１項に記載の変倍光学系。   4. 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. 5. 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レンズ群の間隔が増加することを特徴とする請求項１から４のいずれか１項に記載の変倍光学系。   5. The zoom optical system according to claim 1, wherein a distance between the first lens unit and the second lens unit is increased at the time of zooming from the wide-angle end state to the telephoto end state. 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レンズ群の間隔が減少することを特徴とする請求項１から５のいずれか１項に記載の変倍光学系。   6. The variable power optical system according to claim 1, wherein a distance between the second lens unit and the third lens unit is reduced at the time of zooming from the wide-angle end state to the telephoto end state. 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レンズ群の間隔が増加することを特徴とする請求項１から６のいずれか１項に記載の変倍光学系。   7. The zoom optical system according to claim 1, wherein a distance between the fourth lens unit and the fifth lens unit increases during zooming from the wide-angle end state to the telephoto end state. 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７のいずれか１項に記載の変倍光学系。 Upon zooming, zooming optical system according to any one of claims 1 to 7, the position of the fifth lens group is equal to or is a fixed. 請求項１から８のいずれか１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.
JP2012238733A 2012-10-30 2012-10-30 Variable magnification optical system, optical device Active JP6326712B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2012238733A JP6326712B2 (en) 2012-10-30 2012-10-30 Variable magnification optical system, optical device
PCT/JP2013/079239 WO2014069448A1 (en) 2012-10-30 2013-10-29 Variable magnification optical system, optical device, and production method for variable magnification optical system
CN201380057327.6A CN104755986B (en) 2012-10-30 2013-10-29 Variable magnification optical system, optical device, and production method for variable magnification optical system
US14/700,398 US9453993B2 (en) 2012-10-30 2015-04-30 Variable magnification optical system, optical device, and production method for variable magnification optical system

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JP2014089290A5 true JP2014089290A5 (en) 2015-11-05
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JP6555920B2 (en) * 2015-04-22 2019-08-07 株式会社タムロン Zoom lens and imaging device

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JP3331226B2 (en) * 1992-10-20 2002-10-07 オリンパス光学工業株式会社 Zoom lens
JPH10161028A (en) * 1996-11-28 1998-06-19 Minolta Co Ltd Zoom lens
JP2004117827A (en) * 2002-09-26 2004-04-15 Minolta Co Ltd Imaging apparatus
JP4288408B2 (en) * 2003-02-20 2009-07-01 株式会社ニコン Zoom lens with image shift
JP2005017915A (en) * 2003-06-27 2005-01-20 Ricoh Co Ltd Zoom lens, zoom lens unit and camera apparatus
JP2007003652A (en) * 2005-06-22 2007-01-11 Konica Minolta Photo Imaging Inc Reduction optical system
JP2007248952A (en) * 2006-03-17 2007-09-27 Olympus Imaging Corp Bending variable power optical system
JP5126492B2 (en) * 2007-10-01 2013-01-23 株式会社ニコン Zoom lens and optical apparatus provided with the zoom lens
WO2012090757A1 (en) * 2010-12-27 2012-07-05 コニカミノルタオプト株式会社 Zoom lens and image capture device
JP5686298B2 (en) * 2012-02-28 2015-03-18 コニカミノルタ株式会社 Zoom lens and imaging device

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