DE921641C - Front surface mirror - Google Patents
Front surface mirrorInfo
- Publication number
- DE921641C DE921641C DEZ601D DEZ0000601D DE921641C DE 921641 C DE921641 C DE 921641C DE Z601 D DEZ601 D DE Z601D DE Z0000601 D DEZ0000601 D DE Z0000601D DE 921641 C DE921641 C DE 921641C
- Authority
- DE
- Germany
- Prior art keywords
- front surface
- silver
- mirrors
- surface mirror
- layer
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
- C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
- C03C17/3605—Coatings of the type glass/metal/inorganic compound
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
- C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
- C03C17/3628—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer one layer at least containing a sulfide
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
- C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
- C03C17/3644—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the metal being silver
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
- C03C17/36—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
- C03C17/3602—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer
- C03C17/3657—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the multilayer coating having optical properties
- C03C17/3663—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal the metal being present as a layer the multilayer coating having optical properties specially adapted for use as mirrors
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Optical Elements Other Than Lenses (AREA)
- Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)
Description
Vorderflächenspiegel Von allen Spiegelmetallen hat Silber im sichtbaren Strahlengebiet das höchste Reflexionsvermögen. Seine Verwendung bei Vorderflächenspiegeln ist bisher jedoch sehr beschränkt geblieben, da es äußerst unbeständig gegen atmosphärische Einflüsse ist. Die mit farblosem Schutzlack überzogenen Vorderflächenversilberungen haben nicht befriedigt, besonders deshalb nicht, weil auch die geringfügigsten Dickenunterschiede in der Lackierung zu schlechten oder gar unbrauchbaren Abbildungen Anlaß geben. Außerdem wird eine Schutzschicht aus Lack leicht verkratzt und ist empfindlich gegen Nässe u. dgl. Man hat auch eine Schutzschicht aus Quarz auf das Silber aufgedampft, damit aber ebenfalls keine befriedigenden Resultate erzielt, da der Quarz bereits nach wenigen Monaten rekristallisiert, was zur Folge hat, daß die Schutzschicht aufreißt und in den Rissen; wenn sie auch mikroskopisch fein sind, die Korrosion des Silbers beginnt, so daß eine Schutzwirkung über längere Zeit auch auf diese Weise nicht erzielt wird. Die Aufdampftemperatur für Quarz liegt außerdem schon so hoch, daß der Grundkörper beim Aufdampfen häufig verspannt wird.Front surface mirror Of all mirror metals, silver has in the visible Radiation area has the highest reflectivity. Its use in front surface mirrors has so far remained very limited, however, as it is extremely unstable to atmospheric Influences is. The silver plating on the front surface covered with colorless protective varnish have not been satisfactory, especially not because even the slightest differences in thickness in the paintwork give rise to poor or even unusable images. In addition, a protective layer of paint is easily scratched and sensitive to Wetness and the like. A protective layer of quartz has also been vapor-deposited onto the silver, however, this also does not achieve satisfactory results, since the quartz already does recrystallizes after a few months, with the result that the protective layer rips open and in the cracks; even if they are microscopic, the corrosion of the silver begins, so that a protective effect over a long period of time also on this Way is not achieved. The vapor deposition temperature for quartz is also already there so high that the main body is often strained during vapor deposition.
Nach der Erfindung bringt man auf die Silberschicht eine Schicht aus Zinksulfid (Zn S) auf.According to the invention, a layer is applied to the silver layer Zinc sulfide (Zn S).
Es hat sich gezeigt, daß sich dadurch bei Aufrechterhaltung eines Weißreflexionsvermögens des Spiegels von mehr als 95 % ein auf die Dauer wirksamer Schutz der Silberschicht erzielen läßt. Die Zinksulfidschicht vermag dabei nicht nur gegen atmosphärische Einwirkungen und gegen die Ein- Wirkung der Dämpfe von Benzin, Äther, Spiritus, Petroleum usw. zu schützen, sondern gewährt auch einen guten mechanischen Schutz, so daß derart geschützte Silberspiegel auch durch Abwischen gesäubert werden können, ohne däß dadurch das Auftreten von Streulicht zu befürchten ist.It has been shown that by maintaining a White reflectivity of the mirror of more than 95% is more effective in the long term Protection of the silver layer can be achieved. The zinc sulfide layer cannot do this only against atmospheric influences and against the effect to protect the vapors of gasoline, ether, alcohol, kerosene, etc., but granted also a good mechanical protection, so that such protected silver mirrors also can be cleaned by wiping them without causing stray light is to be feared.
Das Aufbringen der Schutzschicht geschieht zweckmäßigerweise durch Aufdampfung des Zinksulfids im Hochvakuum, wobei bis zu einer solchen Dicke der Schicht aufgedampft wird, bei der sich das höchste Reflexionsvermögen ergibt, was bßi einer Schichtdicke von etwa o,o8,u bei einem Reflexionsvermögen von 96,5% der Fall ist. Im allgemeinen wird es sich um Spiegel handeln, bei denen das Spiegelmetall auf aus Glas, Quarz od. dgl. aufgetragen ist. Die Anwendung einer Rückflächenversilberung= bei diesen Spiegeln stellt nicht nur hohe Anforderungen an die Homogenität des Grundkörperstoffes, da dieser dann von den Strahlen durchsetzt wird, sondern erfordert 4 auch- eine sorgfältige Bearbeitung sowohl der Vorder- als auch der Rückfläche des Grundkörpers, während bei den Vorderflächenspiegeln nur der Vorderfläche des Grundkörpers eine im voraus bestimmte Form gegeben zu werden braucht, was eine wesentliche Vereinfachung in der Herstellung dieser Spiegel mit sich bringt.The protective layer is expediently applied through Vapor deposition of the zinc sulfide in a high vacuum, up to such a thickness of the Layer is vapor-deposited, which gives the highest reflectivity, what bßi a layer thickness of about o, o8, u with a reflectivity of 96.5% of the Case is. In general, it will be a question of mirrors in which the mirror metal Is applied to glass, quartz or the like. The application of a back surface silver plating = These mirrors not only make high demands on the homogeneity of the base material, since this is then penetrated by the rays, but also requires 4 - one careful processing of both the front and the back surface of the base body, while with the front surface mirrors only the front surface of the base body has one a certain form needs to be given in advance, which is an essential simplification in the manufacture of these mirrors.
Die Anwendung von Zinksulfid als alleiniger Spiegelbelag auf einer durchsichtigen Unterlage, wie Glas, Quarz od. dgl., ist bekannt. Dabei handelt es sich jedoch um Spiegel, die teils lichtdurchlässig und teils reflektierend sein sollen und anders auch nicht herstellbar sind.The use of zinc sulfide as the sole mirror coating on a Transparent base, such as glass, quartz or the like, is known. That’s what it’s about However, they are mirrors that are partly translucent and partly reflective should and cannot be produced otherwise.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEZ601D DE921641C (en) | 1943-08-19 | 1943-08-19 | Front surface mirror |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEZ601D DE921641C (en) | 1943-08-19 | 1943-08-19 | Front surface mirror |
Publications (1)
Publication Number | Publication Date |
---|---|
DE921641C true DE921641C (en) | 1954-12-23 |
Family
ID=7617808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEZ601D Expired DE921641C (en) | 1943-08-19 | 1943-08-19 | Front surface mirror |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE921641C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1243833B (en) * | 1962-12-12 | 1967-07-06 | Detag | Process for the production of a surface covering on a transparent carrier, in particular on a pane of glass, with strongly reflective properties in the infrared |
-
1943
- 1943-08-19 DE DEZ601D patent/DE921641C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1243833B (en) * | 1962-12-12 | 1967-07-06 | Detag | Process for the production of a surface covering on a transparent carrier, in particular on a pane of glass, with strongly reflective properties in the infrared |
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