DD107347A1 - - Google Patents
Info
- Publication number
- DD107347A1 DD107347A1 DD17153873A DD17153873A DD107347A1 DD 107347 A1 DD107347 A1 DD 107347A1 DD 17153873 A DD17153873 A DD 17153873A DD 17153873 A DD17153873 A DD 17153873A DD 107347 A1 DD107347 A1 DD 107347A1
- Authority
- DD
- German Democratic Republic
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD17153873A DD107347A1 (ko) | 1973-06-14 | 1973-06-14 | |
| DE19742408217 DE2408217A1 (de) | 1973-06-14 | 1974-02-21 | Anordnung einander in geringem abstand gegenueberstehender fresnelflaechen, insbesondere fuer kondensoren |
| JP5461474A JPS5023644A (ko) | 1973-06-14 | 1974-05-17 | |
| SE7406801A SE7406801L (ko) | 1973-06-14 | 1974-05-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD17153873A DD107347A1 (ko) | 1973-06-14 | 1973-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DD107347A1 true DD107347A1 (ko) | 1974-07-20 |
Family
ID=5491642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DD17153873A DD107347A1 (ko) | 1973-06-14 | 1973-06-14 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5023644A (ko) |
| DD (1) | DD107347A1 (ko) |
| DE (1) | DE2408217A1 (ko) |
| SE (1) | SE7406801L (ko) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051157C (zh) * | 1994-02-16 | 2000-04-05 | 美国3M公司 | 高架投影用的双槽式菲涅尔透镜 |
| DE10261543A1 (de) * | 2002-12-23 | 2004-07-01 | Carl Zeiss | Lupe |
-
1973
- 1973-06-14 DD DD17153873A patent/DD107347A1/xx unknown
-
1974
- 1974-02-21 DE DE19742408217 patent/DE2408217A1/de active Pending
- 1974-05-17 JP JP5461474A patent/JPS5023644A/ja active Pending
- 1974-05-21 SE SE7406801A patent/SE7406801L/xx not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| SE7406801L (ko) | 1974-12-14 |
| JPS5023644A (ko) | 1975-03-13 |
| DE2408217A1 (de) | 1975-01-09 |