DD109449A1 - - Google Patents
Info
- Publication number
- DD109449A1 DD109449A1 DD175335A DD17533573A DD109449A1 DD 109449 A1 DD109449 A1 DD 109449A1 DD 175335 A DD175335 A DD 175335A DD 17533573 A DD17533573 A DD 17533573A DD 109449 A1 DD109449 A1 DD 109449A1
- Authority
- DD
- German Democratic Republic
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS143173A CS158069B1 (xx) | 1973-02-28 | 1973-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DD109449A1 true DD109449A1 (xx) | 1974-11-05 |
Family
ID=5348657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DD175335A DD109449A1 (xx) | 1973-02-28 | 1973-12-14 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3899242A (xx) |
| AT (1) | AT331056B (xx) |
| CS (1) | CS158069B1 (xx) |
| DD (1) | DD109449A1 (xx) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2677989A (en) * | 1952-02-02 | 1954-05-11 | Voigtlaender Ag | Four-component objective of the modified gauss-type |
| US2771817A (en) * | 1955-03-31 | 1956-11-27 | Eastman Kodak Co | Seven-element gauss type objective comprising two negative meniscus components enclosed by two positive components |
| US2807983A (en) * | 1955-11-14 | 1957-10-01 | Farrand Optical Co Inc | Five component high speed objective of modified gaussian type |
-
1973
- 1973-02-28 CS CS143173A patent/CS158069B1/cs unknown
- 1973-12-14 DD DD175335A patent/DD109449A1/xx unknown
- 1973-12-28 AT AT1090073A patent/AT331056B/de not_active IP Right Cessation
-
1974
- 1974-01-21 US US434943A patent/US3899242A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ATA1090073A (de) | 1975-10-15 |
| US3899242A (en) | 1975-08-12 |
| CS158069B1 (xx) | 1974-10-15 |
| DE2364469A1 (de) | 1974-09-05 |
| DE2364469B2 (de) | 1976-01-22 |
| AT331056B (de) | 1976-08-10 |