JP2006284763A5 - - Google Patents
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- JP2006284763A5 JP2006284763A5 JP2005102731A JP2005102731A JP2006284763A5 JP 2006284763 A5 JP2006284763 A5 JP 2006284763A5 JP 2005102731 A JP2005102731 A JP 2005102731A JP 2005102731 A JP2005102731 A JP 2005102731A JP 2006284763 A5 JP2006284763 A5 JP 2006284763A5
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- lens group
- zoom lens
- refractive power
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Claims (21)
前記第3レンズ群は、物体側から順に、正の屈折力を有する前群と、負の屈折力を有する後群とからなり、
前記後群のみを光軸と直交する方向へ移動させることによって結像位置の変位を補正し、
前記後群中の少なくとも一つのレンズ面は、近軸曲率半径を有する球面に比して、光軸から周辺へ向かって正の屈折力が強くなる又は負の屈折力が弱くなる形状の非球面であり、
以下の条件式を満足することを特徴とする防振機能を有するズームレンズ。
3.7 < f1/fw < 7.0
ただし、
f1:前記第1レンズ群の焦点距離
fw:広角端状態における前記ズームレンズの焦点距離 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 zoom lens that performs zooming by changing the interval between the lens groups,
The third lens group includes, in order from the object side, a front group having a positive refractive power and a rear group having a negative refractive power,
Correct the displacement of the imaging position by moving only the rear group in the direction perpendicular to the optical axis,
At least one lens surface in the rear group has an aspherical surface in which the positive refractive power increases toward the periphery from the optical axis or the negative refractive power decreases as compared with a spherical surface having a paraxial radius of curvature. And
A zoom lens having an anti-vibration function characterized by satisfying the following conditional expression:
3.7 <f1 / fw <7.0
However,
f1: Focal length fw of the first lens group fw: Focal length of the zoom lens in the wide-angle end state
1.6 < f3/fw < 3.5
ただし、
f3 :前記第3レンズ群の焦点距離 The zoom lens having an image stabilization function according to claim 1, wherein the following conditional expression is satisfied.
1.6 <f3 / fw <3. 5
However it was,
f3: focal length of the third lens group
0.0001×(h/2) < |X50| < 0.01×(h/2)0.0001 × (h / 2) <| X50 | <0.01 × (h / 2)
0.0001×(h/2) < |Xm| < 0.01×(h/2)0.0001 × (h / 2) <| Xm | <0.01 × (h / 2)
|X50|/|Xm| < 1| X50 | / | Xm | <1
ただし、However,
h :前記非球面の有効径h: Effective diameter of the aspheric surface
X50:前記非球面の光軸から有効径5割の高さにおける近軸曲率半径と非球面形状との偏差量X50: Deviation amount between the paraxial radius of curvature and the aspherical shape at an effective diameter of 50% from the aspherical optical axis
Xm :前記非球面の光軸から有効径10割の高さにおける近軸曲率半径と非球面形状との偏差量Xm: Deviation amount between the paraxial radius of curvature and the aspherical shape at an effective diameter of 100% from the aspherical optical axis
−2.3 < f3R/f3F < −1.2
ただし、
f3F:前記前群の焦点距離
f3R:前記後群の焦点距離 The zoom lens having an anti-vibration function according to any one of claims 1 to 6 , wherein the following conditional expression is satisfied.
-2.3 <f3R / f3F <-1.2
However,
f3F: focal length of the front group f3R: focal length of the rear group
0.90 < f3/f4 < 1.60
ただし、
f4 :前記第4レンズ群の焦点距離 The zoom lens having an image stabilization function according to any one of claims 1 to 7 , wherein the following conditional expression is satisfied.
0.90 <f3 / f4 <1.6 0
However it was,
f4: focal length of the fourth lens group
1.80 < Bfw/fw < 3.001.80 <Bfw / fw <3.00
ただし、 However,
Bfw:広角端状態におけるバックフォーカスBfw: Back focus in the wide-angle 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から請求項9のいずれか1項に記載の防振機能を有するズームレンズ。
0.15 < Ds/f3 < 0.30
ただし、
Ds:前記可変開口絞りと前記後群中の最も物体側のレンズ面との光軸上間隔 A variable aperture stop between the second lens group and the third lens group;
The zoom lens system with a vibration reduction function as claimed in any one of claims 9, characterized by satisfying the following conditional expression.
0.15 <Ds / f3 <0.30
However,
Ds: Distance on the optical axis between the variable aperture stop and the most object side lens surface in the rear group
−0.90 < fw/Re < 0.20
ただし、
Re:前記ズームレンズ中の最も像側のレンズ面の曲率半径 The zoom lens having an anti-vibration function according to any one of claims 1 to 10 , wherein the following conditional expression is satisfied.
−0.90 <fw / Re <0.20
However,
Re: radius of curvature of the lens surface closest to the image side in the zoom lens
前記第3レンズ群は、物体側から順に、正の屈折力を有する前群と、負の屈折力を有する後群とを配置し、The third lens group, in order from the object side, arranges a front group having a positive refractive power and a rear group having a negative refractive power,
前記後群中の少なくとも1つのレンズ面は、近軸曲率半径を有する球面に比して、光軸から周辺へ向かって正の屈折力が強くなる又は負の屈折力が弱くなる形状の非球面であり、The at least one lens surface in the rear group has an aspherical shape in which the positive refractive power increases from the optical axis toward the periphery or the negative refractive power decreases as compared with a spherical surface having a paraxial radius of curvature. And
前記後群を光軸と直交する方向へ移動させることによって結像位置の変位を補正し、The displacement of the imaging position is corrected by moving the rear group in a direction perpendicular to the optical axis,
以下の条件式を満足することを特徴とするズームレンズの変倍方法。A zoom lens zooming method characterized by satisfying the following conditional expression:
3.7 < f1/fw < 7.03.7 <f1 / fw <7.0
ただし、However,
f1:前記第1レンズ群の焦点距離f1: Focal length of the first lens group
fw:広角端状態における前記ズームレンズの焦点距離fw: focal length of the zoom lens in the wide-angle end state
広角端状態から望遠端状態への変倍に際し、前記可変開口絞りは前記前群とともに移動することを特徴とする請求項18から請求項20のいずれか1項に記載のズームレンズの変倍方法。21. The zoom lens zoom method according to claim 18, wherein the variable aperture stop moves together with the front group when zooming from the wide-angle end state to the telephoto end state. .
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005102731A JP4635688B2 (en) | 2005-03-31 | 2005-03-31 | Zoom lens with anti-vibration function |
US11/237,743 US7253965B2 (en) | 2004-10-01 | 2005-09-29 | Zoom lens system with vibration reduction |
EP05256159.4A EP1643293B1 (en) | 2004-10-01 | 2005-09-30 | Zoom lens system with vibration reduction |
EP10182069.4A EP2325688B1 (en) | 2004-10-01 | 2005-09-30 | Zoom lens system with vibration reduction |
EP10182297.1A EP2325680B1 (en) | 2004-10-01 | 2005-09-30 | Zoom lens system with vibration reduction |
EP18191670.1A EP3444654A3 (en) | 2004-10-01 | 2005-09-30 | Zoom lens system with vibration reduction |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005102731A JP4635688B2 (en) | 2005-03-31 | 2005-03-31 | Zoom lens with anti-vibration function |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008246710A Division JP4905429B2 (en) | 2008-09-25 | 2008-09-25 | Zoom lens |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2006284763A JP2006284763A (en) | 2006-10-19 |
JP2006284763A5 true JP2006284763A5 (en) | 2008-05-15 |
JP4635688B2 JP4635688B2 (en) | 2011-02-23 |
Family
ID=37406793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005102731A Active JP4635688B2 (en) | 2004-10-01 | 2005-03-31 | Zoom lens with anti-vibration function |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4635688B2 (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5201809B2 (en) * | 2006-07-06 | 2013-06-05 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
US7609456B2 (en) * | 2006-12-18 | 2009-10-27 | Hoya Corporation | Standard zoom lens system |
JP5064837B2 (en) * | 2007-03-01 | 2012-10-31 | キヤノン株式会社 | Zoom lens with anti-vibration function |
WO2009034712A1 (en) * | 2007-09-12 | 2009-03-19 | Panasonic Corporation | Zoom lens system, imaging device, and camera |
US8064144B2 (en) | 2007-09-12 | 2011-11-22 | Panasonic Corporation | Zoom lens system, imaging device and camera |
JP5242192B2 (en) * | 2008-02-20 | 2013-07-24 | オリンパスイメージング株式会社 | Zoom lens and imaging apparatus using the same |
US8238038B2 (en) | 2008-08-08 | 2012-08-07 | Tamron Co., Ltd. | High variable power zoom lens |
JP5239081B2 (en) * | 2008-08-08 | 2013-07-17 | 株式会社タムロン | High magnification zoom lens |
JP5239082B2 (en) * | 2008-08-08 | 2013-07-17 | 株式会社タムロン | High magnification zoom lens |
JP5239083B2 (en) * | 2008-08-08 | 2013-07-17 | 株式会社タムロン | High magnification zoom lens |
JP4905429B2 (en) * | 2008-09-25 | 2012-03-28 | 株式会社ニコン | Zoom lens |
JP2010266534A (en) * | 2009-05-12 | 2010-11-25 | Tamron Co Ltd | Large-aperture zoom lens |
JP5477154B2 (en) | 2009-05-22 | 2014-04-23 | リコーイメージング株式会社 | High zoom ratio zoom lens system |
JP5448574B2 (en) | 2009-05-26 | 2014-03-19 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
JP2011028259A (en) * | 2009-07-03 | 2011-02-10 | Panasonic Corp | Zoom lens system, imaging device and camera |
JP2011248220A (en) * | 2010-05-28 | 2011-12-08 | Tamron Co Ltd | High variable power zoom lens |
JP2011248219A (en) * | 2010-05-28 | 2011-12-08 | Tamron Co Ltd | High variable power zoom lens |
US9140905B2 (en) | 2010-12-21 | 2015-09-22 | Samsung Electronics Co., Ltd. | Vibration proof zoom lens and photographing apparatus having the same |
WO2013129487A1 (en) | 2012-02-29 | 2013-09-06 | 株式会社ニコン | Variable-power optical system, optical device, and method for producing variable-power optical system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3029148B2 (en) * | 1991-08-30 | 2000-04-04 | キヤノン株式会社 | Rear focus zoom lens |
JP3919580B2 (en) * | 2002-04-04 | 2007-05-30 | キヤノン株式会社 | Zoom lens and optical apparatus having the same |
JP4366932B2 (en) * | 2002-12-20 | 2009-11-18 | 株式会社ニコン | Zoom lens |
JP4470143B2 (en) * | 2003-02-25 | 2010-06-02 | 株式会社ニコン | Zoom lens |
JP4288409B2 (en) * | 2003-02-27 | 2009-07-01 | 株式会社ニコン | Zoom lens |
JP4589231B2 (en) * | 2003-06-13 | 2010-12-01 | パナソニック株式会社 | Zoom lens, imaging device, and camera equipped with imaging device |
-
2005
- 2005-03-31 JP JP2005102731A patent/JP4635688B2/en active Active
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