FR854417A - écran bleu - Google Patents
écran bleuInfo
- Publication number
- FR854417A FR854417A FR854417DA FR854417A FR 854417 A FR854417 A FR 854417A FR 854417D A FR854417D A FR 854417DA FR 854417 A FR854417 A FR 854417A
- Authority
- FR
- France
- Prior art keywords
- blue screen
- blue
- screen
- Prior art date
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/04—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages the fastening being onto or by the light source
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR854417T | 1939-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR854417A true FR854417A (fr) | 1940-04-15 |
Family
ID=9327755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR854417D Expired FR854417A (fr) | 1939-05-08 | 1939-05-08 | écran bleu |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR854417A (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3639345A1 (de) * | 1986-03-17 | 1987-09-24 | Horst Schaettgen | Farbfiltereinrichtung fuer mit einer lampe versehene beleuchtungskoerper |
-
1939
- 1939-05-08 FR FR854417D patent/FR854417A/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3639345A1 (de) * | 1986-03-17 | 1987-09-24 | Horst Schaettgen | Farbfiltereinrichtung fuer mit einer lampe versehene beleuchtungskoerper |
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