JP2007093985A5 - - Google Patents
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- JP2007093985A5 JP2007093985A5 JP2005282976A JP2005282976A JP2007093985A5 JP 2007093985 A5 JP2007093985 A5 JP 2007093985A5 JP 2005282976 A JP2005282976 A JP 2005282976A JP 2005282976 A JP2005282976 A JP 2005282976A JP 2007093985 A5 JP2007093985 A5 JP 2007093985A5
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- lens
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- conditional expression
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- 230000003287 optical Effects 0.000 claims 4
- 230000005499 meniscus Effects 0.000 claims 3
- 238000005452 bending Methods 0.000 claims 2
Claims (7)
広角端状態から望遠端状態への変倍に際して、前記第１レンズ群は固定であり、前記第１レンズ群と前記第２レンズ群との空気間隔及び前記第２レンズ群と前記第３レンズ群との空気間隔を変化させ、
前記第１レンズ群は、光路折り曲げ光学素子を有し、
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。
−０．７＜ｆ１／ｆ２＜−０．４
但し、
ｆ１：前記第１レンズ群の焦点距離
ｆ２：前記第２レンズ群の焦点距離 In order from the object side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a positive refractive power,
When zooming from the wide-angle end state to the telephoto end state, the first lens group is fixed, the air gap between the first lens group and the second lens group, and the second lens group and the third lens group. Change the air distance between
The first lens group includes an optical path bending optical element,
A zoom lens satisfying the following conditional expression:
−0.7 <f1 / f2 <−0. 4
However then,
f1: focal length of the first lens group f2: focal length of the second lens group
０．１＜ｆ２／ｆ３＜０．３0.1 <f2 / f3 <0.3
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
以下の条件式を満足することを特徴とする請求項１又は請求項２に記載のズームレンズ。
−０．４＜ｆ１／ｆ４＜−０．２
但し、
ｆ４：前記第４レンズ群の焦点距離 A fourth lens group having a positive refractive power that is fixed upon zooming from the wide-angle end state to the telephoto end state on the image side of the third lens group;
The zoom lens according to claim 1 or claim 2, characterized by satisfying the following conditional expression.
−0.4 <f1 / f4 <−0.2
However,
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から請求項３のいずれか１項に記載のズームレンズ。
２＜０．１（ν１−ν２）＋ｎ１＜４
但し、
ｎ１：前記負メニスカスレンズの材質のｄ線（λ＝５８７．６ｎｍ）に対する屈折率
ν１：前記負メニスカスレンズの材質のｄ線（λ＝５８７．６ｎｍ）に対するアッベ数
ν２：前記正レンズ成分のうち、最も物体側に配置された正レンズ成分中の正レンズの材質のｄ線（λ＝５８７．６ｎｍ）に対するアッベ数 The first lens group includes a negative meniscus lens that is disposed closest to the object side and has a convex surface facing the object side, and at least one positive lens component.
The zoom lens according to any one of claims 1 to 3, wherein the following conditional expression is satisfied.
2 <0.1 (ν1−ν2) + n1 <4
However,
n1: Refractive index for the d-line (λ = 587.6 nm) of the material of the negative meniscus lens ν1: Abbe number ν2 for the d-line (λ = 587.6 nm) of the material of the negative meniscus lens: Of the positive lens components , Abbe number with respect to d-line (λ = 587.6 nm) of the material of the positive lens in the positive lens component arranged closest to the object side
−０．６６＜ｆ１／ｆ２＜−０．４−0.66 <f1 / f2 <−0.4
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005282976A JP4951915B2 (en) | 2005-09-28 | 2005-09-28 | Zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005282976A JP4951915B2 (en) | 2005-09-28 | 2005-09-28 | Zoom lens |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2007093985A JP2007093985A (en) | 2007-04-12 |
| JP2007093985A5 true JP2007093985A5 (en) | 2008-12-25 |
| JP4951915B2 JP4951915B2 (en) | 2012-06-13 |
Family
ID=37979796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005282976A Expired - Fee Related JP4951915B2 (en) | 2005-09-28 | 2005-09-28 | Zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4951915B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4823666B2 (en) * | 2005-12-05 | 2011-11-24 | Ｈｏｙａ株式会社 | Zoom lens system |
| JP5378163B2 (en) * | 2009-11-09 | 2013-12-25 | 富士フイルム株式会社 | Projection zoom lens and projection display device |
| JP5273172B2 (en) | 2011-02-08 | 2013-08-28 | 株式会社ニコン | Zoom lens, optical device, and zoom lens manufacturing method |
| JP6226610B2 (en) * | 2013-07-30 | 2017-11-08 | キヤノン株式会社 | Zoom lens and imaging apparatus having the same |
| EP4328646A4 (en) * | 2021-04-21 | 2024-07-17 | Beijing Xiaomi Mobile Software Co Ltd | Zoom lens and camera device having same |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08227039A (en) * | 1995-02-21 | 1996-09-03 | Copal Co Ltd | Zoom lens |
| JP4451069B2 (en) * | 2002-04-05 | 2010-04-14 | オリンパス株式会社 | Zoom lens and electronic imaging device using the same |
| JP2003344767A (en) * | 2002-05-29 | 2003-12-03 | Olympus Optical Co Ltd | Zoom lens and electronic image pickup device having the same |
| JP4197888B2 (en) * | 2002-05-09 | 2008-12-17 | オリンパス株式会社 | Electronic imaging apparatus and zoom lens used in electronic imaging apparatus |
| JP2004037925A (en) * | 2002-07-04 | 2004-02-05 | Minolta Co Ltd | Imaging apparatus |
| JP4290935B2 (en) * | 2002-07-18 | 2009-07-08 | オリンパス株式会社 | Electronic imaging device |
| JP2004246141A (en) * | 2003-02-14 | 2004-09-02 | Olympus Corp | Electronic imaging unit |
| JP3788441B2 (en) * | 2003-05-13 | 2006-06-21 | コニカミノルタオプト株式会社 | Imaging lens device |
| JP4803952B2 (en) * | 2003-06-04 | 2011-10-26 | オリンパス株式会社 | Electronic imaging device |
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2005
- 2005-09-28 JP JP2005282976A patent/JP4951915B2/en not_active Expired - Fee Related