GB2301453B - Three group zoom lens system - Google Patents
Three group zoom lens systemInfo
- Publication number
- GB2301453B GB2301453B GB9612852A GB9612852A GB2301453B GB 2301453 B GB2301453 B GB 2301453B GB 9612852 A GB9612852 A GB 9612852A GB 9612852 A GB9612852 A GB 9612852A GB 2301453 B GB2301453 B GB 2301453B
- Authority
- GB
- United Kingdom
- Prior art keywords
- zoom lens
- lens system
- group zoom
- group
- zoom
- 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 - Lifetime
Links
Classifications
-
- 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
- G02B15/143—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 three groups only
- G02B15/1431—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 three groups only the first group being positive
- G02B15/143103—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 three groups only the first group being positive arranged ++-
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9313297A GB2280278A (en) | 1993-06-28 | 1993-06-28 | Three group zoom lens |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9612852D0 GB9612852D0 (en) | 1996-08-21 |
GB2301453A GB2301453A (en) | 1996-12-04 |
GB2301453B true GB2301453B (en) | 1997-08-06 |
Family
ID=10737914
Family Applications (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9612852A Expired - Lifetime GB2301453B (en) | 1993-06-28 | 1993-06-28 | Three group zoom lens system |
GB9612866A Expired - Lifetime GB2301456B (en) | 1993-06-28 | 1993-06-28 | Three group zoom lens system |
GB9612853A Expired - Lifetime GB2301454B (en) | 1993-06-28 | 1993-06-28 | Three group zoom lens system |
GB9612851A Expired - Lifetime GB2301452B (en) | 1993-06-28 | 1993-06-28 | Three group zoom lens system |
GB9612865A Expired - Lifetime GB2301455B (en) | 1993-06-28 | 1993-06-28 | Three group zoom lens system |
Family Applications After (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9612866A Expired - Lifetime GB2301456B (en) | 1993-06-28 | 1993-06-28 | Three group zoom lens system |
GB9612853A Expired - Lifetime GB2301454B (en) | 1993-06-28 | 1993-06-28 | Three group zoom lens system |
GB9612851A Expired - Lifetime GB2301452B (en) | 1993-06-28 | 1993-06-28 | Three group zoom lens system |
GB9612865A Expired - Lifetime GB2301455B (en) | 1993-06-28 | 1993-06-28 | Three group zoom lens system |
Country Status (1)
Country | Link |
---|---|
GB (5) | GB2301453B (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4983027A (en) * | 1988-03-31 | 1991-01-08 | Minolta Camera Kabushiki Kaisha | Compact zoom lens system with a high zoom ratio |
US5159494A (en) * | 1989-06-29 | 1992-10-27 | Olympus Optical Co., Ltd. | Zoom lens system |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2870098B2 (en) * | 1990-03-07 | 1999-03-10 | ミノルタ株式会社 | Compact zoom lens system |
-
1993
- 1993-06-28 GB GB9612852A patent/GB2301453B/en not_active Expired - Lifetime
- 1993-06-28 GB GB9612866A patent/GB2301456B/en not_active Expired - Lifetime
- 1993-06-28 GB GB9612853A patent/GB2301454B/en not_active Expired - Lifetime
- 1993-06-28 GB GB9612851A patent/GB2301452B/en not_active Expired - Lifetime
- 1993-06-28 GB GB9612865A patent/GB2301455B/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4983027A (en) * | 1988-03-31 | 1991-01-08 | Minolta Camera Kabushiki Kaisha | Compact zoom lens system with a high zoom ratio |
US5159494A (en) * | 1989-06-29 | 1992-10-27 | Olympus Optical Co., Ltd. | Zoom lens system |
Also Published As
Publication number | Publication date |
---|---|
GB2301456A (en) | 1996-12-04 |
GB2301455B (en) | 1997-08-06 |
GB2301453A (en) | 1996-12-04 |
GB9612866D0 (en) | 1996-08-21 |
GB2301454A (en) | 1996-12-04 |
GB9612865D0 (en) | 1996-08-21 |
GB2301454B (en) | 1997-08-06 |
GB9612852D0 (en) | 1996-08-21 |
GB2301452B (en) | 1997-08-06 |
GB2301452A (en) | 1996-12-04 |
GB2301455A (en) | 1996-12-04 |
GB9612853D0 (en) | 1996-08-21 |
GB2301456B (en) | 1997-08-06 |
GB9612851D0 (en) | 1996-08-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20090813 AND 20090819 |
|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20101111 AND 20101117 |
|
PE20 | Patent expired after termination of 20 years |
Expiry date: 20130627 |