DE279650C - - Google Patents
Info
- Publication number
- DE279650C DE279650C DENDAT279650D DE279650DA DE279650C DE 279650 C DE279650 C DE 279650C DE NDAT279650 D DENDAT279650 D DE NDAT279650D DE 279650D A DE279650D A DE 279650DA DE 279650 C DE279650 C DE 279650C
- Authority
- DE
- Germany
- Prior art keywords
- smoothness
- silver
- base
- projection screen
- adhesive
- 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
- 239000011521 glass Substances 0.000 claims description 6
- 230000001070 adhesive Effects 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- 239000011049 pearl Substances 0.000 description 2
- -1 canvas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000002023 wood 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
- G03B21/602—Lenticular screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Gegenstand der Erfindung ist eine Weiterausbildung des durch das Patent 271520 geschützten Projektionsschirmes, bei dem auf eine Unterlage von Papier, Leinwand, Kartön, Pappe, Holz ο. dgl. Glasperlen mittels eines geeigneten Klebemittels aufgebracht sind.The subject of the invention is a further development of the patent protected by 271520 Projection screen, in which on a base of paper, canvas, cardboard, Cardboard, wood ο. Like. Glass beads are applied by means of a suitable adhesive.
Das Wesen der Erfindung liegt darin, daß zur Erzielung eines möglichst weißen Untergrundes für die Glasperlenauflage die aus gespannter Leinwand bestehende Unterlage für die Gläsperlen mit Silberglätte (d. h. einer besonders hellen Variation der Bleiglätte). behandelt wird. Dies kann entweder in der Weise geschehen, daß die Silberglätte und der zum Festhalten der Glasperlen dienende Klebstoff zusammen aufgetragen werden, indem man die Silberglätte mit einem geeigneten Klebstoff anrührt und die Unterlage, wie beispielsweise Leinwand, alsdann mit dieser Mischung bestreicht, oder man kann auch die Unterlage, zuerst nur mit SilberglätteThe essence of the invention is that to achieve a background as white as possible for the glass bead layer, the base made of stretched canvas for the glass pearls with silver smoothness (i.e. a particularly bright variation of the black lead). treated will. This can be done either in such a way that the silver smoothness and the adhesive used to hold the glass beads in place can be applied together by one touches the silver smoothness with a suitable adhesive and the base, such as canvas, then coated with this mixture, or one can also the base, at first only with silver smoothness
überziehen und nach dem Trocknen der Farbschicht einen durchsichtigen Klebstoff auftragen, an dem die Perlen haften.cover and after the paint layer has dried, apply a transparent adhesive, to which the pearls adhere.
Bei einem entsprechend der vorliegenden Erfindung hergestellten Projektionsschirm absorbiert alsdann die Unterlage der Glasperlenschicht nur sehr wenig Licht, was zur Folge hat, daß fast alles auf dem Projektionsschirm aufgeworfene Licht wieder reflektiert wird, so daß die Stärke der zur Projizierung verwandten Lichtquelle nur sehr gering zu sein braucht.Absorbed in a projection screen made in accordance with the present invention then the base of the glass bead layer only has very little light, with the result that almost everything is on the projection screen Thrown light is reflected back, so that the strength of the projection used Light source only needs to be very small.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE279650C true DE279650C (en) | 1900-01-01 |
Family
ID=535546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT279650D Expired DE279650C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE279650C (en) |
-
0
- DE DENDAT279650D patent/DE279650C/de not_active Expired
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