JP2008191231A5 - - Google Patents
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- JP2008191231A5 JP2008191231A5 JP2007023041A JP2007023041A JP2008191231A5 JP 2008191231 A5 JP2008191231 A5 JP 2008191231A5 JP 2007023041 A JP2007023041 A JP 2007023041A JP 2007023041 A JP2007023041 A JP 2007023041A JP 2008191231 A5 JP2008191231 A5 JP 2008191231A5
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- JP
- Japan
- Prior art keywords
- lens
- optical system
- satisfied
- focal length
- following condition
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- 230000003287 optical Effects 0.000 claims 16
- 238000003384 imaging method Methods 0.000 claims 2
Claims (10)
該第３レンズの焦点距離をｆ３、全系の焦点距離をｆとするとき
０．８＜|ｆ３／ｆ|＜１．２
なる条件を満足することを特徴とする光学系。 As an optical member having optical power in order from the object side to the image side, a first lens having a negative refractive power with a convex surface facing the object side, a second lens having a positive refractive power, a third lens having a negative refractive power, An optical system comprising a fourth lens having a positive refractive power,
When the focal length of the third lens is f3 and the focal length of the entire system is f, 0.8 <| f3 / f | <1.2
An optical system characterized by satisfying the following conditions.
０．９＜ｆ４／ｆ＜１．７
なる条件を満足することを特徴とする請求項１に記載の光学系。 When the focal length of the fourth lens is f4, 0.9 <f4 / f <1.7
The optical system according to claim 1, wherein the following condition is satisfied.
１．０＜Ｄ２／ｆ＜２．５
なる条件を満足することを特徴とする請求項１又は２に記載の光学系。 When the distance between the first lens and the second lens is D2, 1.0 <D2 / f <2.5
The optical system according to claim 1, wherein the following condition is satisfied.
０．８＜ｆ２／ｆ＜１．２
なる条件を満足することを特徴とする請求項１乃至３のいずれか１項に記載の光学系。 When the focal length of the second lens is f2, 0.8 <f2 / f <1.2
The optical system according to claim 1, wherein the following condition is satisfied.
１．４＜|ｆ１／ｆ|＜２．３
なる条件を満足することを特徴とする請求項１乃至４のいずれか１項に記載の光学系。 When the focal length of the first lens is f1, 1.4 <| f1 / f | <2.3
The optical system according to any one of claims 1 to 4, wherein the following condition is satisfied.
０．６５＜|ｆ３／ｆ４|＜０．９
なる条件を満足することを特徴とする請求項１乃至５のいずれか１項に記載の光学系。 When the focal length of the fourth lens is f4, 0.65 <| f3 / f4 | <0.9
The optical system according to claim 1, wherein the following condition is satisfied.
０．４＜Ｇ１Ｒ２／Ｇ２Ｒ１＜１．２
なる条件を満足することを特徴とする請求項１乃至６のいずれか１項の光学系。 When the curvature radii of the object side surface and the image side surface of the first lens are G1R1 and G1R2, respectively, 0.4 <G1R2 / G2R1 <1.2
The optical system according to claim 1, wherein the following condition is satisfied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007023041A JP5037960B2 (en) | 2007-02-01 | 2007-02-01 | Optical system and imaging apparatus having the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007023041A JP5037960B2 (en) | 2007-02-01 | 2007-02-01 | Optical system and imaging apparatus having the same |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2008191231A JP2008191231A (en) | 2008-08-21 |
| JP2008191231A5 true JP2008191231A5 (en) | 2010-03-18 |
| JP5037960B2 JP5037960B2 (en) | 2012-10-03 |
Family
ID=39751426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007023041A Expired - Fee Related JP5037960B2 (en) | 2007-02-01 | 2007-02-01 | Optical system and imaging apparatus having the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5037960B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901586B (en) * | 2014-04-13 | 2016-01-20 | 浙江舜宇光学有限公司 | 3D interactive projection camera lens |
| KR102125161B1 (en) | 2016-03-28 | 2020-06-19 | 애플 인크. | Foldable lens system with 4 refractive lenses |
| TWI730517B (en) | 2019-11-29 | 2021-06-11 | 大立光電股份有限公司 | Lens system and electronic device |
| CN114384678B (en) * | 2022-03-24 | 2022-07-29 | 浙江华诺康科技有限公司 | Objective lens for endoscope and endoscope |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2667695B1 (en) * | 1990-10-09 | 1993-08-27 | Thomson Trt Defense | LENS SYSTEM WITH OPTICAL ATHERMALIZATION. |
| JP3380015B2 (en) * | 1993-11-12 | 2003-02-24 | ペンタックス株式会社 | Endoscope objective lens |
| JP3385090B2 (en) * | 1994-04-21 | 2003-03-10 | ペンタックス株式会社 | Objective lens for oblique side-viewing endoscope |
| JPH10170821A (en) * | 1996-12-16 | 1998-06-26 | Olympus Optical Co Ltd | Objective lens for endoscope |
| US5875059A (en) * | 1997-02-19 | 1999-02-23 | Eastman Kodak Company | Variable focal length lens system having a divergent front lens unit |
| JP3758801B2 (en) * | 1997-04-16 | 2006-03-22 | ペンタックス株式会社 | Endoscope objective lens system |
| JP3742484B2 (en) * | 1997-04-30 | 2006-02-01 | ペンタックス株式会社 | Endoscope objective lens system |
-
2007
- 2007-02-01 JP JP2007023041A patent/JP5037960B2/en not_active Expired - Fee Related
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