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DE841625C - Process for the production of reflection-reducing layers, e.g. B. on glass - Google Patents

Process for the production of reflection-reducing layers, e.g. B. on glass

Info

Publication number
DE841625C
DE841625C DEL3192D DEL0003192D DE841625C DE 841625 C DE841625 C DE 841625C DE L3192 D DEL3192 D DE L3192D DE L0003192 D DEL0003192 D DE L0003192D DE 841625 C DE841625 C DE 841625C
Authority
DE
Germany
Prior art keywords
refractive index
glass
reflection
production
reducing layers
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
Application number
DEL3192D
Other languages
German (de)
Inventor
Gottfried Dr-Ing Rosenthal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz Wetzlar GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ernst Leitz Wetzlar GmbH filed Critical Ernst Leitz Wetzlar GmbH
Priority to DEL3192D priority Critical patent/DE841625C/en
Application granted granted Critical
Publication of DE841625C publication Critical patent/DE841625C/en
Expired legal-status Critical Current

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
    • C03C17/001—General methods for coating; Devices therefor
    • 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
    • C03C17/3411—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
    • 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
    • C03C17/3411—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
    • C03C17/3417—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials all coatings being oxide coatings

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)
  • Physical Vapour Deposition (AREA)

Description

Verfahren zur Herstellung reflexmindernder Schichten, z. B. auf Glas Es ist bekannt, daß man das Reflexionsvermögen der Oberflächen durchsichtiger Körper herabsetzen kann durch Aufbringen einer dünnen Sc'hic'ht von kleinerem Brechungsindex als desjenigen des Körpers. Es ist auch bekannt, daß die Schicht inhomogen sein kann, d. h. daß ihr Brechungsindex nsg allmä'hlic'h in ns" übergeht, wo nsa der Brechungsindex der Schicht an der an den Körper angrenzenden Seite, ns" derjenige der an Luft angrenzenden Seite ist. Man erhält bekanntlich die größte Reflexminderung einer solchen Schicht, wenn ist, wo ng der Brechungsindex des Körpers (Glas) und n" der Brechungsindex des Außenmediums (Luft) ist.Process for the production of anti-reflective layers, e.g. B. on glass It is known that the reflectivity of the surfaces of transparent bodies can be reduced by applying a thin layer of a smaller refractive index than that of the body. It is also known that the layer can be inhomogeneous, ie that its refractive index nsg gradually changes into ns ", where nsa is the refractive index of the layer on the side adjacent to the body, ns" that of the side adjacent to air . As is known, the greatest reduction in reflection of such a layer is obtained if is where ng is the refractive index of the body (glass) and n "is the refractive index of the external medium (air).

Der mittlere Brechungsindex der Sc'hic'ht kann größer sein als der des Körpers.The mean refractive index of the layer can be greater than that of the body.

Nach der Erfindung wird die Inhomogenität der Schicht dadurch erreicht, daß im Vakuum zwei Substanzen in einem Arbeitsvorgang gemeinsam verdampft werden, von denen die eine einen hohen Brechungsindex und niedrigen Verdampfungspunkt, die andere einen niedrigen Brechungsindex und einen hohen Verdampfungspunkt haben muB.According to the invention, the inhomogeneity of the layer is achieved by that in a vacuum two substances are evaporated together in one operation, one of which has a high refractive index and low evaporation point, the others must have a low index of refraction and a high evaporation point.

Beginnt man durch allmähliches Steigern der Temperatur des Behälters oder Trägers der Substanz diese zu verdampfen, so wird zuerst der Teil mit dem hohen Brechungsindex und der niedrigen Verdampfungstemperatur verdampfen und sich auf der. tu,:' belegepdrb : Fle Aschlagen. Beim Steigern der Temperatur wird in immer stärkerein. Maße der andere Teil der Substanz mit zur Verdampfung kommen, bis scUließlch zuletzt nur Substanz mit niedrigem Brechungsindex verdampft und sich niederschlägt. Auf diese Weise wird eine Schicht erzeugt, die sich kontinuierlich vom hohen zuni'niediigeti'-Brechungsindex ändert, und zwar ohne,daß eine solche Änderung, wie dies bisher geschehen ist, durch entsprechend verlaufende Porosität erkauft werden müßte. Sie ist deshalb besonders haltbar.You start by gradually increasing the temperature of the container or carrier of the substance to vaporize it, the part with the high becomes first Refractive index and the low evaporation temperature evaporate and get on the. tu ,: 'belegepdrb: Fle Ashing. As the temperature rises, it becomes stronger and stronger. Measure the other part of the substance with evaporation until finally only substance with a low refractive index evaporates and precipitates. on In this way, a layer is produced which continuously differs from the high low refractive index changes without making such a change as has happened so far correspondingly running porosity would have to be bought. It is therefore special durable.

Es kommen grundsätzlich alle Substanzen in Frage, die obengenannte Bedingungen erfüllen. Wegen seines 'hohen Verdampfürigslunktes und niedrigen Brechungsindex eignet sich als Außensubstanz besonders Quarz und wegen .des , hohen Brechungsindex qnd 'hiedrigen Verdampfurigspteükbes. Zinksulfid als Innensubstanz.Basically all substances come into question, the above-mentioned ones Satisfy conditions. Because of its high evaporation point and low refractive index Quartz is particularly suitable as an external substance and because of its high refractive index qnd 'lower evaporation parts. Zinc sulfide as the inner substance.

Claims (1)

PATENTANSPRUCH---Verfahren "zur; Erzeugung reflexmindernder Schichten, z. B. auf Glas, durch Aufdampfen- im Vakuum, dadurch gekennzeichnet, daß eine inhomogene Schicht erzeugt wird durch gleichzeitiges Erhitzen von zwei (oder mehr) Substanzen, von denen die eine einen hohen Brechungsindex und niedrige Verdampfungstemperatur, die andere. niedrigen Brechungsindex und hohe Verdampfungstemperatur hat, und daß dabei die Temperatur allmählich geändert wird. Angezogene Druckschriften: Deutsche Patentschrift Nr. 685 767.PATENT CLAIM --- Process "for the production of reflection-reducing layers, z. B. on glass, by vapor deposition in a vacuum, characterized in that an inhomogeneous Layer is created by heating two (or more) substances at the same time, one of which has a high refractive index and low evaporation temperature, the other. has low refractive index and high evaporation temperature, and that gradually changing the temperature. Printed publications: German U.S. Patent No. 685,767.
DEL3192D 1942-02-01 1942-02-01 Process for the production of reflection-reducing layers, e.g. B. on glass Expired DE841625C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL3192D DE841625C (en) 1942-02-01 1942-02-01 Process for the production of reflection-reducing layers, e.g. B. on glass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL3192D DE841625C (en) 1942-02-01 1942-02-01 Process for the production of reflection-reducing layers, e.g. B. on glass

Publications (1)

Publication Number Publication Date
DE841625C true DE841625C (en) 1952-06-16

Family

ID=7256090

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL3192D Expired DE841625C (en) 1942-02-01 1942-02-01 Process for the production of reflection-reducing layers, e.g. B. on glass

Country Status (1)

Country Link
DE (1) DE841625C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908412A1 (en) * 1978-03-08 1979-09-20 Roy Gerald Gordon METHOD AND DEVICE FOR COATING A SUBSTRATE
DE3616332A1 (en) * 1986-05-15 1987-11-19 Hans Joachim Dipl Phys Dr -Ing Kirschning Photovoltaically active glass component

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE685767C (en) * 1935-11-01 1939-12-23 Zeiss Carl Fa Process for increasing the light transmittance of optical parts by lowering the refraction exponent at the interfaces of these optical parts

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE685767C (en) * 1935-11-01 1939-12-23 Zeiss Carl Fa Process for increasing the light transmittance of optical parts by lowering the refraction exponent at the interfaces of these optical parts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908412A1 (en) * 1978-03-08 1979-09-20 Roy Gerald Gordon METHOD AND DEVICE FOR COATING A SUBSTRATE
DE3616332A1 (en) * 1986-05-15 1987-11-19 Hans Joachim Dipl Phys Dr -Ing Kirschning Photovoltaically active glass component

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