DD99858A5 - - Google Patents
Info
- Publication number
- DD99858A5 DD99858A5 DD161930A DD16193072A DD99858A5 DD 99858 A5 DD99858 A5 DD 99858A5 DD 161930 A DD161930 A DD 161930A DD 16193072 A DD16193072 A DD 16193072A DD 99858 A5 DD99858 A5 DD 99858A5
- Authority
- DD
- German Democratic Republic
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 |
|---|---|
| DD99858A5 true DD99858A5 (Direct) | 1973-08-20 |
Family
ID=9849218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DD161930A DD99858A5 (Direct) | 1971-03-31 | 1972-03-30 |
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 |
|---|---|
| FR2132334A6 (Direct) | 1972-11-17 |
| DE2212535A1 (de) | 1972-10-12 |
| IT1045153B (it) | 1980-05-10 |
| GB1323221A (en) | 1973-07-11 |
| NL7204399A (Direct) | 1972-10-03 |