NL6800621A - - Google Patents
Info
- Publication number
- NL6800621A NL6800621A NL6800621A NL6800621A NL6800621A NL 6800621 A NL6800621 A NL 6800621A NL 6800621 A NL6800621 A NL 6800621A NL 6800621 A NL6800621 A NL 6800621A NL 6800621 A NL6800621 A NL 6800621A
- Authority
- NL
- Netherlands
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
- G02B15/145511—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 arranged -+-+-
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2231/67A GB1167373A (en) | 1967-01-16 | 1967-01-16 | Optical Objective of Variable Focal Length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6800621A true NL6800621A (en) | 1968-07-17 |
Family
ID=9735906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6800621A NL6800621A (en) | 1967-01-16 | 1968-01-15 |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH482207A (en) |
| DE (1) | DE1622990A1 (en) |
| FR (1) | FR1560457A (en) |
| GB (1) | GB1167373A (en) |
| NL (1) | NL6800621A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5040144A (en) * | 1973-08-17 | 1975-04-12 | ||
| GB2253281B (en) * | 1991-02-15 | 1994-05-25 | Asahi Optical Co Ltd | Zoom lens |
-
1966
- 1966-01-16 CH CH60768A patent/CH482207A/en not_active IP Right Cessation
-
1967
- 1967-01-16 GB GB2231/67A patent/GB1167373A/en not_active Expired
-
1968
- 1968-01-10 DE DE19681622990 patent/DE1622990A1/en active Pending
- 1968-01-15 NL NL6800621A patent/NL6800621A/xx unknown
- 1968-01-16 FR FR1560457D patent/FR1560457A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1622990A1 (en) | 1972-01-05 |
| GB1167373A (en) | 1969-10-15 |
| FR1560457A (en) | 1969-03-21 |
| CH482207A (en) | 1969-11-30 |