JPS50149360A - - Google Patents
Info
- Publication number
- JPS50149360A JPS50149360A JP50047365A JP4736575A JPS50149360A JP S50149360 A JPS50149360 A JP S50149360A JP 50047365 A JP50047365 A JP 50047365A JP 4736575 A JP4736575 A JP 4736575A JP S50149360 A JPS50149360 A JP S50149360A
- Authority
- JP
- Japan
- 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
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
- G02B15/144—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 four groups only
- G02B15/1441—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 four groups only the first group being positive
- G02B15/144109—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 four groups only the first group being positive arranged +--+
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/462,366 US3975089A (en) | 1974-04-19 | 1974-04-19 | Zoom lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS50149360A true JPS50149360A (ja) | 1975-11-29 |
Family
ID=23836178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50047365A Pending JPS50149360A (ja) | 1974-04-19 | 1975-04-18 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3975089A (ja) |
| JP (1) | JPS50149360A (ja) |
| DE (1) | DE2517385A1 (ja) |
| GB (1) | GB1498727A (ja) |
| HK (1) | HK14979A (ja) |
| MY (1) | MY7900175A (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58150926A (ja) * | 1982-03-04 | 1983-09-07 | Canon Inc | ズ−ムレンズ |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2533825C3 (de) * | 1975-07-29 | 1979-02-01 | Jos. Schneider & Co, Optische Werke, 6550 Bad Kreuznach | Entfernungseinstellung bei Objektiven mit veränderbarer Brennweite |
| JPS5832684B2 (ja) * | 1977-07-30 | 1983-07-14 | 旭光学工業株式会社 | 高変倍率を有する広角ズ−ムレンズ系 |
| JPS5576318A (en) * | 1978-12-05 | 1980-06-09 | Canon Inc | Zoom lens system |
| US4256381A (en) * | 1980-01-31 | 1981-03-17 | Vivitar Corporation | Zoom lens |
| USRE32923E (en) * | 1980-01-31 | 1989-05-16 | Vivitar Corporation | Zoom lens |
| JPS56133713A (en) * | 1980-03-24 | 1981-10-20 | Asahi Optical Co Ltd | Zoom lens |
| US4634236A (en) * | 1980-06-12 | 1987-01-06 | Minolta Camera Kabushiki Kaisha | Compact zoom lens system of a relatively high zoom ratio capable of providing a wide field angle |
| US4466708A (en) * | 1981-12-28 | 1984-08-21 | Vivitar Corporation | Zoom lens |
| JPS59129818A (ja) * | 1983-01-18 | 1984-07-26 | Canon Inc | ズ−ムレンズのフオ−カス方法 |
| US4687302A (en) * | 1983-06-01 | 1987-08-18 | Canon Kabushiki Kaisha | Zoom lens |
| JPH0690361B2 (ja) * | 1984-10-18 | 1994-11-14 | オリンパス光学工業株式会社 | ズ−ムレンズ |
| US4812030A (en) * | 1985-01-03 | 1989-03-14 | The Boeing Company | Catoptric zoom optical device |
| EP0250686A1 (fr) * | 1986-06-26 | 1988-01-07 | Etablissements Pierre Angenieux | Dispositif d'objectif à focale variable |
| FR2580412B1 (fr) * | 1985-04-10 | 1989-02-17 | Angenieux P Ets | Dispositif d'objectif a focale variable |
| US5442485A (en) * | 1992-10-15 | 1995-08-15 | Olympus Optical Co., Ltd. | Zoom lens system |
| US6046861A (en) * | 1997-10-08 | 2000-04-04 | Vari-Lite. Inc. | Zoom lens system having imaging and non-imaging ranges |
| JP2000121942A (ja) | 1998-10-16 | 2000-04-28 | Olympus Optical Co Ltd | ズームレンズ |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1277581B (de) * | 1965-04-03 | 1968-09-12 | Zeiss Carl Fa | Photographisches Objektiv kontinuierlich veraenderbarer Brennweite |
| US3533678A (en) * | 1969-04-03 | 1970-10-13 | Bausch & Lomb | Zoom type projection lens system having three movable members and a finite focus |
| JPS5119983B2 (ja) * | 1972-09-20 | 1976-06-22 |
-
1974
- 1974-04-19 US US05/462,366 patent/US3975089A/en not_active Expired - Lifetime
-
1975
- 1975-04-16 GB GB15651/75A patent/GB1498727A/en not_active Expired
- 1975-04-18 JP JP50047365A patent/JPS50149360A/ja active Pending
- 1975-04-19 DE DE19752517385 patent/DE2517385A1/de active Pending
-
1979
- 1979-03-22 HK HK149/79A patent/HK14979A/xx unknown
- 1979-12-30 MY MY175/79A patent/MY7900175A/xx unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58150926A (ja) * | 1982-03-04 | 1983-09-07 | Canon Inc | ズ−ムレンズ |
| JPS6155653B2 (ja) * | 1982-03-04 | 1986-11-28 | Canon Kk |
Also Published As
| Publication number | Publication date |
|---|---|
| HK14979A (en) | 1979-03-30 |
| GB1498727A (en) | 1978-01-25 |
| MY7900175A (en) | 1979-12-31 |
| US3975089A (en) | 1976-08-17 |
| DE2517385A1 (de) | 1975-10-30 |