FR2255620B1 - - Google Patents
Info
- Publication number
- FR2255620B1 FR2255620B1 FR7441822A FR7441822A FR2255620B1 FR 2255620 B1 FR2255620 B1 FR 2255620B1 FR 7441822 A FR7441822 A FR 7441822A FR 7441822 A FR7441822 A FR 7441822A FR 2255620 B1 FR2255620 B1 FR 2255620B1
- 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
- G02B15/22—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 with movable lens means specially adapted for focusing at close distances
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Picture Signal Circuits (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT1067473A AT323440B (de) | 1973-12-20 | 1973-12-20 | Pankratisches objektiv |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2255620A1 FR2255620A1 (en) | 1975-07-18 |
FR2255620B1 true FR2255620B1 (enrdf_load_stackoverflow) | 1978-06-23 |
Family
ID=3623936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7441822A Granted FR2255620A1 (en) | 1973-12-20 | 1974-12-18 | Variable focus lens for TV cameras - gives uniform high contrast over whole image field even at extreme edges |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5098340A (enrdf_load_stackoverflow) |
AT (1) | AT323440B (enrdf_load_stackoverflow) |
CH (1) | CH572629A5 (enrdf_load_stackoverflow) |
DE (1) | DE2459865A1 (enrdf_load_stackoverflow) |
FR (1) | FR2255620A1 (enrdf_load_stackoverflow) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59181313A (ja) * | 1983-03-17 | 1984-10-15 | Konishiroku Photo Ind Co Ltd | ズ−ムレンズ |
JPS6011812A (ja) * | 1983-06-30 | 1985-01-22 | Asahi Optical Co Ltd | バツクフオ−カスの長いズ−ムレンズ |
JPS60133412A (ja) * | 1983-12-22 | 1985-07-16 | Matsushita Electric Ind Co Ltd | ズ−ムレンズ |
JPS615223A (ja) * | 1984-06-19 | 1986-01-11 | Matsushita Electric Ind Co Ltd | 画面抱括範囲の広いズ−ムレンズ |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5540851B2 (enrdf_load_stackoverflow) * | 1972-08-29 | 1980-10-21 |
-
1973
- 1973-12-20 AT AT1067473A patent/AT323440B/de not_active IP Right Cessation
-
1974
- 1974-11-18 CH CH1492274A patent/CH572629A5/xx not_active IP Right Cessation
- 1974-12-18 FR FR7441822A patent/FR2255620A1/fr active Granted
- 1974-12-18 DE DE19742459865 patent/DE2459865A1/de not_active Withdrawn
- 1974-12-20 JP JP14667974A patent/JPS5098340A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
AT323440B (de) | 1975-07-10 |
JPS5098340A (enrdf_load_stackoverflow) | 1975-08-05 |
DE2459865A1 (de) | 1975-07-03 |
FR2255620A1 (en) | 1975-07-18 |
CH572629A5 (enrdf_load_stackoverflow) | 1976-02-13 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |