JPS4953821A - - Google Patents
Info
- Publication number
- JPS4953821A JPS4953821A JP9571272A JP9571272A JPS4953821A JP S4953821 A JPS4953821 A JP S4953821A JP 9571272 A JP9571272 A JP 9571272A JP 9571272 A JP9571272 A JP 9571272A JP S4953821 A JPS4953821 A JP S4953821A
- 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
- G02B15/22—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)
- Lens Barrels (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9571272A JPS4953821A (enExample) | 1972-09-22 | 1972-09-22 | |
| DE19732347487 DE2347487C2 (de) | 1972-09-22 | 1973-09-21 | Fokussierungseinrichtung für ein photographisches Linsensystem |
| US05/562,036 US3997245A (en) | 1972-09-22 | 1975-03-25 | Close-up focusing device in a photographic lens assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9571272A JPS4953821A (enExample) | 1972-09-22 | 1972-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS4953821A true JPS4953821A (enExample) | 1974-05-25 |
Family
ID=14145090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9571272A Pending JPS4953821A (enExample) | 1972-09-22 | 1972-09-22 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS4953821A (enExample) |
| DE (1) | DE2347487C2 (enExample) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5251786U (enExample) * | 1975-10-09 | 1977-04-13 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2732763A (en) * | 1956-01-31 | Varifocal lens constructions and devices |
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1972
- 1972-09-22 JP JP9571272A patent/JPS4953821A/ja active Pending
-
1973
- 1973-09-21 DE DE19732347487 patent/DE2347487C2/de not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5251786U (enExample) * | 1975-10-09 | 1977-04-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2347487C2 (de) | 1982-06-03 |
| DE2347487A1 (de) | 1974-04-11 |