DE312157C - - Google Patents
Info
- Publication number
- DE312157C DE312157C DENDAT312157D DE312157DA DE312157C DE 312157 C DE312157 C DE 312157C DE NDAT312157 D DENDAT312157 D DE NDAT312157D DE 312157D A DE312157D A DE 312157DA DE 312157 C DE312157 C DE 312157C
- Authority
- DE
- Germany
- Prior art keywords
- wave
- peaks
- elevations
- screen
- lines
- 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
- 239000000463 material Substances 0.000 description 2
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 1
- 229920013660 Cellon Polymers 0.000 description 1
- 229920002160 Celluloid Polymers 0.000 description 1
- 239000001828 Gelatine Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 239000011521 glass Substances 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
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/62—Translucent screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE312157C true DE312157C (OSRAM) | 1900-01-01 |
Family
ID=565106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT312157D Expired DE312157C (OSRAM) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE312157C (OSRAM) |
-
0
- DE DENDAT312157D patent/DE312157C/de not_active Expired
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