BE411997A - - Google Patents
Info
- Publication number
- BE411997A BE411997A BE411997DA BE411997A BE 411997 A BE411997 A BE 411997A BE 411997D A BE411997D A BE 411997DA BE 411997 A BE411997 A BE 411997A
- Authority
- BE
- Belgium
- Prior art keywords
- screen
- window
- darkroom
- mirrors
- enlarged
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005338 frosted glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/10—Projectors with built-in or built-on screen
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lenses (AREA)
- Studio Devices (AREA)
- Projection-Type Copiers In General (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE411997A true BE411997A (enrdf_load_stackoverflow) |
Family
ID=75839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE411997D BE411997A (enrdf_load_stackoverflow) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE411997A (enrdf_load_stackoverflow) |
-
0
- BE BE411997D patent/BE411997A/fr unknown
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