BE670505A - - Google Patents
Info
- Publication number
- BE670505A BE670505A BE670505DA BE670505A BE 670505 A BE670505 A BE 670505A BE 670505D A BE670505D A BE 670505DA BE 670505 A BE670505 A BE 670505A
- Authority
- BE
- Belgium
- Prior art keywords
- slide
- white
- illuminated
- black
- pigmented layer
- Prior art date
Links
- 230000001681 protective effect Effects 0.000 claims description 11
- 239000005357 flat glass Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 239000011521 glass Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/04—Signs, boards or panels, illuminated from behind the insignia
- G09F13/08—Signs, boards or panels, illuminated from behind the insignia using both translucent and non-translucent layers
- G09F13/10—Signs, boards or panels, illuminated from behind the insignia using both translucent and non-translucent layers using transparencies
-
- 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
- G02B27/02—Viewing or reading apparatus
- G02B27/022—Viewing apparatus
- G02B27/024—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE670505A true BE670505A (enrdf_load_stackoverflow) |
Family
ID=208305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE670505D BE670505A (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE670505A (enrdf_load_stackoverflow) |
-
0
- BE BE670505D patent/BE670505A/fr unknown
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