FR2132334A6 - - Google Patents
Info
- Publication number
- FR2132334A6 FR2132334A6 FR7211501A FR7211501A FR2132334A6 FR 2132334 A6 FR2132334 A6 FR 2132334A6 FR 7211501 A FR7211501 A FR 7211501A FR 7211501 A FR7211501 A FR 7211501A FR 2132334 A6 FR2132334 A6 FR 2132334A6
- Authority
- FR
- France
- 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
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
- G02B15/145—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 five groups only
- G02B15/1455—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 five groups only the first group being negative
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Lens Barrels (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB826771 | 1971-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2132334A6 true FR2132334A6 (Direct) | 1972-11-17 |
Family
ID=9849218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7211501A Expired FR2132334A6 (Direct) | 1971-03-31 | 1972-03-31 |
Country Status (6)
| Country | Link |
|---|---|
| DD (1) | DD99858A5 (Direct) |
| DE (1) | DE2212535A1 (Direct) |
| FR (1) | FR2132334A6 (Direct) |
| GB (1) | GB1323221A (Direct) |
| IT (1) | IT1045153B (Direct) |
| NL (1) | NL7204399A (Direct) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2253281B (en) * | 1991-02-15 | 1994-05-25 | Asahi Optical Co Ltd | Zoom lens |
| WO2013057909A1 (ja) | 2011-10-20 | 2013-04-25 | 富士フイルム株式会社 | 投写用ズームレンズおよび投写型表示装置 |
-
1971
- 1971-03-31 GB GB826771A patent/GB1323221A/en not_active Expired
-
1972
- 1972-03-15 DE DE19722212535 patent/DE2212535A1/de active Pending
- 1972-03-30 IT IT68022/72A patent/IT1045153B/it active
- 1972-03-30 DD DD161930A patent/DD99858A5/xx unknown
- 1972-03-30 NL NL7204399A patent/NL7204399A/xx unknown
- 1972-03-31 FR FR7211501A patent/FR2132334A6/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2212535A1 (de) | 1972-10-12 |
| DD99858A5 (Direct) | 1973-08-20 |
| IT1045153B (it) | 1980-05-10 |
| GB1323221A (en) | 1973-07-11 |
| NL7204399A (Direct) | 1972-10-03 |