DE1250155B - - Google Patents
Info
- Publication number
- DE1250155B DE1250155B DEM46092A DE1250155DA DE1250155B DE 1250155 B DE1250155 B DE 1250155B DE M46092 A DEM46092 A DE M46092A DE 1250155D A DE1250155D A DE 1250155DA DE 1250155 B DE1250155 B DE 1250155B
- Authority
- DE
- Germany
- Prior art keywords
- cover glass
- aqueous alkali
- alkali silicate
- film
- rough
- 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.)
- Pending
Links
- 239000006059 cover glass Substances 0.000 claims description 10
- 229910052910 alkali metal silicate Inorganic materials 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N Silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate 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
- G03B21/64—Means for mounting individual pictures to be projected, e.g. frame for transparency
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Surface Treatment Of Glass (AREA)
Description
PATENTAMTPATENT OFFICE
Int. Cl.Int. Cl.
G03bG03b
Nummer: 1250155Number: 1250155
Die Erfindung betrifft ein Deckglas für FUmdiapositive, dessen auf den Film aufzulegende Fläche zur Verhütung Newtonscher Ringe rauh ist.The invention relates to a cover glass for film transparencies, the surface of which is to be placed on the film to prevent Newton's rings from being rough.
Es sind Deckgläser für Filmdiapositive bekannt, deren auf den Film aufzulegende Fläche rauh ist. S Bisher wurde eine Aufrauhung derartiger Deckgläser auf chemischem oder auch mechanischem Weg durchgeführt. Durch diese Ausbildung werden bei der Projektion der Filme störende, farbige Interferenzerscheinungen, sogenannte Newtonsche Ringe, vermieden.Cover glasses for film slides are known whose surface to be placed on the film is rough. S. So far, such cover glasses have been roughened chemically or mechanically carried out. With this training, disruptive, colored interference phenomena are avoided when the films are projected. so-called Newton's rings, avoided.
Der gleiche Effekt ließe sich in technischer einfacher Weise mit Hilfe einer auf das Deckglas aufgetragenen rauhen, durchsichtigen Schicht erreichen; aber hierfür konnte bisher kein befriedigender Vorschlag gemacht werden.The same effect could be achieved in a technically simple manner with the aid of an applied to the cover glass achieve rough, transparent layer; but so far no satisfactory proposal has been made for this be made.
Die Lösung dieses Problems wird durch die Erfindung dadurch erzielt, daß diese rauhe Fläche eine Kieselsäure- oder Silikatschicht ist, die durch Auftragen eines wäßrigen Alkalisilikats und durch ao The solution to this problem is achieved by the invention in that this rough surface is a silicic acid or silicate layer, which by application of an aqueous alkali silicate and by ao
anschließende Erhitzung gebildet wird.subsequent heating is formed.
Das hierfür erforderliche Ausgangsmaterial ist billig, und der Herstellungsprozeß ist im Prinzip einfach. Der Brechungsexponent der neuen Schicht ist relativ klein, so daß bei der zur Verhütung as Newtonscher Ringe erforderlichen Rauhigkeit der Oberfläche keine Abbildung der Struktur das projizierte Bild überlagert. Die neue Schicht bietet der mit ihr bedeckten Glasoberfläche einen bemerkenswerten Schutz gegen Beschädigungen irgendwelcher Art.The raw material required for this is cheap and the manufacturing process is simple in principle. The refraction exponent of the new layer is relatively small, so that for prevention as Newton's rings required roughness of the surface to not map the structure being projected Overlaid image. The new layer offers the glass surface it covers a remarkable one Protection against damage of any kind.
Die Erfindung wird an Hand der Zeichnung durch das folgende Beispiel erläutert.The invention is illustrated by the following example with reference to the drawing.
Danach ist die Oberfläche α eines Deckglases für Filmdiapositive mit einer Kieselsäure- oder Silikatschichte bedeckt. Die Schicht ist durch Auftragen, beispielsweise Aufsprühen, Aufdrucken oder Aufwalzen, eines nötigenfalls mit destilliertem Wasser verdünnten Alkalisilikats auf die Glasunterlage b gebildet und durch einen nachfolgenden Erhitzungs-Anmelder: Thereafter, the surface α of a cover glass for film slides is covered with a silica or silicate layer. The layer is formed by applying, for example spraying, printing or rolling, an alkali silicate diluted with distilled water, if necessary, to the glass substrate b and by a subsequent heating applicant:
Gerhard Menzel, Glasbearbeitungswerk, Braunschweig-Lehndorf, Saarbrückener Str. 248Gerhard Menzel, glass processing plant, Braunschweig-Lehndorf, Saarbrückener Str. 248
Als Erfinder benannt:
Gerhard Menzel,Named as inventor:
Gerhard Menzel,
Hermann Grube, Braunschweig-Lehndorf; Dipl.-Ing. Walter Häfner, Wettingen (Schweiz) - ·Hermann Grube, Braunschweig-Lehndorf; Dipl.-Ing. Walter Häfner, Wettingen (Switzerland) - ·
prozeß in Form einer Kieselsäure- oder Silikatschicht mit der Glasunterlage fest vereinigt.process in the form of a silica or silicate layer firmly united with the glass base.
Der Erhitzungsprozeß wird zweckmäßigerweise bei einer Temperatur von etwa 200° C in etwa 2 bis 2V2 Minuten durchgeführt.The heating process is expediently at a temperature of about 200 ° C in about 2 to Carried out for 2V2 minutes.
Claims (4)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1250155B true DE1250155B (en) | 1967-09-14 |
Family
ID=603976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEM46092A Pending DE1250155B (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1250155B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3007534A1 (en) * | 1980-02-28 | 1981-09-03 | Filmosto-Projektion Johannes Jost Gmbh & Co, 4300 Essen | Hinged frame for holding photo-transparency - located between two transparent polymer foils, each coated on both sides with scratch resistant lacquer |
| DE3125717A1 (en) * | 1980-07-21 | 1982-03-11 | Drexler Technology Corp., Palo Alto, Calif. | REFLECTIVE DATA STORAGE AND RECORDING MEDIA |
-
0
- DE DEM46092A patent/DE1250155B/de active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3007534A1 (en) * | 1980-02-28 | 1981-09-03 | Filmosto-Projektion Johannes Jost Gmbh & Co, 4300 Essen | Hinged frame for holding photo-transparency - located between two transparent polymer foils, each coated on both sides with scratch resistant lacquer |
| DE3125717A1 (en) * | 1980-07-21 | 1982-03-11 | Drexler Technology Corp., Palo Alto, Calif. | REFLECTIVE DATA STORAGE AND RECORDING MEDIA |
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