BE726697A - - Google Patents
Info
- Publication number
- BE726697A BE726697A BE726697DA BE726697A BE 726697 A BE726697 A BE 726697A BE 726697D A BE726697D A BE 726697DA BE 726697 A BE726697 A BE 726697A
- Authority
- BE
- Belgium
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/4272—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having plural diffractive elements positioned sequentially along the optical path
- G02B27/4277—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having plural diffractive elements positioned sequentially along the optical path being separated by an air space
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE726697 | 1969-01-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE726697A true BE726697A (xx) | 1969-06-16 |
Family
ID=3854086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE726697D BE726697A (xx) | 1969-01-09 | 1969-01-09 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE726697A (xx) |
| GB (1) | GB1300912A (xx) |
-
1969
- 1969-01-09 BE BE726697D patent/BE726697A/xx unknown
-
1970
- 1970-01-08 GB GB96570A patent/GB1300912A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1300912A (en) | 1972-12-29 |