BE544524A - - Google Patents
Info
- Publication number
- BE544524A BE544524A BE544524DA BE544524A BE 544524 A BE544524 A BE 544524A BE 544524D A BE544524D A BE 544524DA BE 544524 A BE544524 A BE 544524A
- Authority
- BE
- Belgium
- Prior art keywords
- glass plate
- chalk
- opaque
- write
- light rays
- Prior art date
Links
- 239000011521 glass Substances 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000007858 starting material Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0091—Positioning aspects of the light source relative to the light guide
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE544524A true BE544524A (enrdf_load_stackoverflow) |
Family
ID=172464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE544524D BE544524A (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE544524A (enrdf_load_stackoverflow) |
-
0
- BE BE544524D patent/BE544524A/fr unknown
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