JP2001100100A5 - - Google Patents
Download PDFInfo
- Publication number
- JP2001100100A5 JP2001100100A5 JP1999275476A JP27547699A JP2001100100A5 JP 2001100100 A5 JP2001100100 A5 JP 2001100100A5 JP 1999275476 A JP1999275476 A JP 1999275476A JP 27547699 A JP27547699 A JP 27547699A JP 2001100100 A5 JP2001100100 A5 JP 2001100100A5
- Authority
- JP
- Japan
- Prior art keywords
- lens
- negative
- lens group
- refractive power
- positive
- 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.)
- Pending
Links
- 230000003287 optical Effects 0.000 claims 1
- 206010010071 Coma Diseases 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
Description
【０００７】
【課題を解決するための手段】
上記目的を達成するために、本発明のズームレンズは、第２レンズ群を、スクリーン側より順に、正レンズ，負レンズのレンズ配列を有するとともに、前記負レンズのスクリーン側のレンズ面の曲率の中心がスクリーン側に位置する構成としている。また、第４レンズ群を、像面側に凹面を向けた負レンズと、スクリーン側に凹面を向けた負レンズとの少なくとも２枚の負レンズを含むとともに、これら２枚の負レンズの間に、像面側に凸面を向けた正レンズを有する構成にするものである。
[0007]
[Means for Solving the Problems]
In order to achieve the above object, in the zoom lens according to the present invention, the second lens unit has a lens arrangement of a positive lens and a negative lens in order from the screen side, and the curvature of the lens surface of the negative lens on the screen side The center is located on the screen side . In addition, the fourth lens group includes at least two negative lenses, a negative lens having a concave surface facing the image plane, and a negative lens having a concave surface facing the screen, and between the two negative lenses And a positive lens having a convex surface on the image plane side.
また、第２レンズ群の構成を、スクリーン側より順に、正レンズ，負レンズのレンズ配列を有するとともに、前記負レンズのスクリーン側のレンズ面の曲率の中心がスクリーン側に位置する構成にすることで、大口径化に伴うコマ収差の増大を抑えることができるとともに、コンパクト化に伴う像面湾曲の増大を抑えることが可能となる。 Further, the second lens group is configured to have a lens arrangement of a positive lens and a negative lens in order from the screen side, and a center of curvature of a lens surface on the screen side of the negative lens is located on the screen side. Thus, it is possible to suppress an increase in coma aberration accompanying an increase in the aperture, and to suppress an increase in curvature of field due to the compactification.
第２レンズ群２０は、スクリーン側より順に、正レンズ，負レンズのレンズ配列を有するとともに、負レンズのスクリーン側のレンズ面の曲率の中心はスクリーン側に位置している。また、第４レンズ群４０は、像面側に凹面を向けた負レンズと、スクリーン側に凹面を向けた負レンズとの少なくとも２枚の負レンズを含むとともに、これら２枚の負レンズの間に、像面側に凸面を向けた正レンズを有する。 The second lens group 20 has a lens arrangement of a positive lens and a negative lens in order from the screen side, and the center of curvature of the lens surface on the screen side of the negative lens is located on the screen side . The fourth lens group 40 includes at least two negative lenses, a negative lens having a concave surface facing the image plane and a negative lens having a concave surface facing the screen, and the fourth lens group 40 has a distance between these two negative lenses. And a positive lens having a convex surface on the image plane side.
また、第２レンズ群の構成を、スクリーン側より順に、正レンズ，負レンズのレンズ配列を有するとともに、負レンズのスクリーン側のレンズ面の曲率の中心がスクリーン側に位置する構成にすることで、大口径化に伴うコマ収差の増大を抑えることができるとともに、コンパクト化に伴う像面湾曲の増大を抑えることができる。
In addition, the configuration of the second lens group has a lens arrangement of a positive lens and a negative lens in order from the screen side, and the center of curvature of the lens surface on the screen side of the negative lens is positioned on the screen side While being able to suppress the increase in coma aberration accompanying the large aperture, it is possible to suppress the increase in curvature of field accompanying the compactification.
Claims (3)
前記第２レンズ群は、スクリーン側より順に、正レンズ，負レンズのレンズ配列を有するとともに、前記負レンズはスクリーン側のレンズ面の曲率の中心がスクリーン側に位置していることを特徴とする投映用ズームレンズ。In order from the screen side, the first lens group of negative refractive power, the second lens group of positive refractive power, the third lens group of positive refractive power, the fourth lens group of negative refractive power, of positive refractive power The first lens unit and the fifth lens unit are fixed when the zoom is performed from the wide-angle end to the telephoto end, and the second lens unit, In a projection zoom lens for relatively moving the third lens unit and the fourth lens unit on the optical axis,
The second lens group has a lens arrangement of a positive lens and a negative lens in order from the screen side, and the negative lens is characterized in that the center of curvature of the lens surface on the screen side is located on the screen side. Projection zoom lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27547699A JP2001100100A (en) | 1999-09-29 | 1999-09-29 | Zoom lens for projection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27547699A JP2001100100A (en) | 1999-09-29 | 1999-09-29 | Zoom lens for projection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001100100A JP2001100100A (en) | 2001-04-13 |
| JP2001100100A5 true JP2001100100A5 (en) | 2005-05-12 |
Family
ID=17556071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27547699A Pending JP2001100100A (en) | 1999-09-29 | 1999-09-29 | Zoom lens for projection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001100100A (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7436599B2 (en) * | 2001-05-14 | 2008-10-14 | Olympus Corporation | Electronic image pickup system |
| EP2450733B1 (en) * | 2002-04-05 | 2013-06-05 | Olympus Corporation | Electronic imaging system comprising a zoom lens |
| JP4633847B2 (en) * | 2002-04-05 | 2011-02-16 | オリンパス株式会社 | Zoom lens and electronic imaging device using the same |
| JP2006065249A (en) | 2004-08-30 | 2006-03-09 | Fujinon Corp | Zoom lens and projection type display device using the same |
| JP4612824B2 (en) | 2004-09-17 | 2011-01-12 | キヤノン株式会社 | Image projection device |
| CN100346188C (en) * | 2006-01-20 | 2007-10-31 | 中国兵器工业第二O五研究所 | Continuous varifocus projecting lens for projector |
| JP2009020283A (en) * | 2007-07-11 | 2009-01-29 | Fujinon Corp | Zoom lens for projection and projection type display device |
| JP2010122326A (en) * | 2008-11-17 | 2010-06-03 | Fujinon Corp | Zoom lens for projection and projection-type display device |
| JP2010160478A (en) | 2008-12-08 | 2010-07-22 | Fujinon Corp | Projection zoom lens and projection type display apparatus |
| JP5653165B2 (en) | 2009-12-22 | 2015-01-14 | キヤノン株式会社 | Zoom lens |
| JP5486415B2 (en) * | 2009-12-28 | 2014-05-07 | 富士フイルム株式会社 | Projection zoom lens and projection display device |
| CN113960753B (en) * | 2018-07-13 | 2024-08-13 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN110441895B (en) * | 2019-07-30 | 2024-05-03 | 中影巴可（北京）电子有限公司 | Projection zoom lens with 4K pixel-level high resolution |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02118507A (en) * | 1988-10-27 | 1990-05-02 | Canon Inc | Lens system of long back focus |
| JPH05241072A (en) * | 1992-02-28 | 1993-09-21 | Konica Corp | Zoom lens |
| JPH09230242A (en) * | 1996-02-22 | 1997-09-05 | Nikon Corp | Zoom lens |
| JP3987168B2 (en) * | 1997-09-26 | 2007-10-03 | リコー光学株式会社 | Projection zoom lens |
| JP3954736B2 (en) * | 1998-11-02 | 2007-08-08 | 株式会社コシナ | Zoom lens for projection |
-
1999
- 1999-09-29 JP JP27547699A patent/JP2001100100A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4509559B2 (en) | Wide-angle imaging optical system, wide-angle imaging device including the same, surveillance imaging device, in-vehicle imaging device, and projection device | |
| JP3753842B2 (en) | Super wide-angle lens system | |
| JP2000352665A5 (en) | ||
| JPS63291019A (en) | Endoscope objective | |
| JP2001133687A5 (en) | ||
| JPH07261083A (en) | Zoom lens | |
| JP2001100100A5 (en) | ||
| JP4338827B2 (en) | Zoom lens | |
| JPH05113534A (en) | Retrofocus type lens | |
| JP2000111798A5 (en) | ||
| JP4233062B2 (en) | Imaging lens | |
| JP2004516509A (en) | Projection lens device | |
| JP2003149556A5 (en) | ||
| JP3725276B2 (en) | Imaging lens | |
| JP2001154093A5 (en) | ||
| JPS6185921A (en) | Apparatus for observing and photographing eyebottom | |
| JPS61240217A (en) | Compact wide angle zoom lens | |
| JP2578481B2 (en) | Projection lens | |
| JP2000035533A5 (en) | Imaging lens and lens system | |
| US5790324A (en) | Wide-angle photographic lens system | |
| JP2004004620A5 (en) | ||
| JP2000267005A5 (en) | ||
| CN208076823U (en) | Rigid endoscope | |
| JPH10319315A (en) | Image formation lens | |
| KR101382702B1 (en) | Lens system for camera |