KR100310435B1 - 광각줌렌즈 - Google Patents
광각줌렌즈 Download PDFInfo
- Publication number
- KR100310435B1 KR100310435B1 KR1019930029033A KR930029033A KR100310435B1 KR 100310435 B1 KR100310435 B1 KR 100310435B1 KR 1019930029033 A KR1019930029033 A KR 1019930029033A KR 930029033 A KR930029033 A KR 930029033A KR 100310435 B1 KR100310435 B1 KR 100310435B1
- Authority
- KR
- South Korea
- Prior art keywords
- lens
- lens group
- refractive power
- group
- wide
- 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.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only
- G02B15/1421—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only the first group being positive
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
Description
Claims (3)
- 물체측으로부터 정(正)의 굴절력을 갖는 제1렌즈군과, 부(負)의 굴절력을 갖는 제2렌즈군으로 이루어져 있으며, 양 렌즈군의 간격을 변화시킴으로써 변배를 행하는 줌 렌즈에 있어서,상기한 제1렌즈군은 물체측에서 상면측으로 순차적으로 부의 굴절력을 갖는 전군 렌즈군과 정의 굴절력의 후군 렌즈군으로 구성되어 있고, 상기 전군 렌즈군은 물체측으로부터 첫 번째 오목인 부의 굴절력을 갖는 메니스커스 렌즈를 포함하고, 후군 렌즈군은 적어도 4매 이상의 정 또는 부의 굴절력을 갖는 렌즈들을 포함하며, 아래의 조건을 만족함을 특징으로 하는 광각 줌 렌즈.(조건식 1)4.5<|fF/fw|<13(조건식 2)0.005<|K/fF|<0.07(조건식 3)20<|(fbwㆍfF)/fw|<100여기서,fF: 제1렌즈군의 전군 렌즈군의 초점거리fw: 광각단에서의 줌 렌즈의 초점거리K: 제1렌즈군에 있어서, 상면측의 맨 끝 렌즈면에서 상면측 방향을 정의 방향이라 할 때, 제1렌즈군의 상면측의 맨 끝 렌즈면에서 제1렌즈군의 후측 주점(제2주점) 까지의 축상거리fbw: 광각단에서의 줌 렌즈의 후초점거리
- 제1항에 있어서,상기 후군 렌즈군은 물체측으로부터 정의 렌즈와 물체측이 오목면인 부의 렌즈와 2매의 정의 렌즈를 포함하면서 아래의 조건을 만족하는 것을 특징으로 하는 광각 줌 렌즈.(조건식 4)0.85<M/fw<1.5(조건식 5)0.05<dT/fT<0.055여기서,M: 제1렌즈군에 있어서 후군 렌즈군의 물체측 첫 번째 렌즈면에서 상면측 맨 끝 렌즈면까지의 축상거리fT: 망원단에서의 줌 렌즈의 초점거리dT: 망원단에 있어서, 제1렌즈군의 상면측 맨 끝 렌즈면에서 제2렌즈군의 물체측 첫 번째 렌즈면까지의 축상거리
- 제1항에 있어서, 제2렌즈군은 물체측으로부터 상면측이 볼록면인 정의 렌즈와 물체측이 오목면인 부의 렌즈와 상면측이 볼록면인 부의 렌즈로 구성되어 있고, 아래의 조건을 만족하는 것을 특징으로 하는 광각 줌 렌즈.(조건식 6)0.35<|f2/fw|<0.55여기서,f2: 제2렌즈군의 초점거리
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930029033A KR100310435B1 (ko) | 1993-12-22 | 1993-12-22 | 광각줌렌즈 |
US08/358,751 US5526187A (en) | 1993-12-22 | 1994-12-19 | Wide angle zoom lens |
CN94113100A CN1116717A (zh) | 1993-12-22 | 1994-12-20 | 广角变焦镜头 |
DE4445775A DE4445775A1 (de) | 1993-12-22 | 1994-12-21 | Weitwinkel-Zoom-Objektiv |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930029033A KR100310435B1 (ko) | 1993-12-22 | 1993-12-22 | 광각줌렌즈 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR950019885A KR950019885A (ko) | 1995-07-24 |
KR100310435B1 true KR100310435B1 (ko) | 2001-12-28 |
Family
ID=19372091
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019930029033A Expired - Fee Related KR100310435B1 (ko) | 1993-12-22 | 1993-12-22 | 광각줌렌즈 |
Country Status (4)
Country | Link |
---|---|
US (1) | US5526187A (ko) |
KR (1) | KR100310435B1 (ko) |
CN (1) | CN1116717A (ko) |
DE (1) | DE4445775A1 (ko) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08227038A (ja) * | 1994-12-22 | 1996-09-03 | Asahi Optical Co Ltd | ズームレンズ系 |
JP3409231B2 (ja) * | 1995-09-28 | 2003-05-26 | コニカ株式会社 | ズームレンズ |
KR100354428B1 (ko) * | 1995-12-11 | 2003-01-24 | 삼성테크윈 주식회사 | 광각변배파인더 |
US5999331A (en) * | 1997-02-07 | 1999-12-07 | Minolta Co., Ltd. | Zoom lens system |
JP3495622B2 (ja) * | 1998-12-22 | 2004-02-09 | ペンタックス株式会社 | ズームレンズ系 |
US7173777B1 (en) * | 2006-02-14 | 2007-02-06 | 3M Innovative Properties Company | Projection lens and display device for multimedia and other systems |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4756609A (en) * | 1987-07-13 | 1988-07-12 | Eastman Kodak Company | Four component compact zoom lens |
JP3294870B2 (ja) * | 1991-07-04 | 2002-06-24 | 旭光学工業株式会社 | ズームレンズ |
JP3063248B2 (ja) * | 1991-07-17 | 2000-07-12 | 株式会社ニコン | 広角ズームレンズ |
JP3294911B2 (ja) * | 1993-07-27 | 2002-06-24 | 旭光学工業株式会社 | ズームレンズ系 |
-
1993
- 1993-12-22 KR KR1019930029033A patent/KR100310435B1/ko not_active Expired - Fee Related
-
1994
- 1994-12-19 US US08/358,751 patent/US5526187A/en not_active Expired - Lifetime
- 1994-12-20 CN CN94113100A patent/CN1116717A/zh active Pending
- 1994-12-21 DE DE4445775A patent/DE4445775A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
CN1116717A (zh) | 1996-02-14 |
DE4445775A1 (de) | 1995-06-29 |
US5526187A (en) | 1996-06-11 |
KR950019885A (ko) | 1995-07-24 |
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