GB1501820A - Glass - Google Patents

Glass

Info

Publication number
GB1501820A
GB1501820A GB1827076A GB1827076A GB1501820A GB 1501820 A GB1501820 A GB 1501820A GB 1827076 A GB1827076 A GB 1827076A GB 1827076 A GB1827076 A GB 1827076A GB 1501820 A GB1501820 A GB 1501820A
Authority
GB
United Kingdom
Prior art keywords
glass
component
photochromic
weight per
per cent
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
GB1827076A
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
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 Carl Zeiss AG filed Critical Carl Zeiss AG
Publication of GB1501820A publication Critical patent/GB1501820A/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
    • C03C4/00—Compositions for glass with special properties
    • C03C4/04—Compositions for glass with special properties for photosensitive glass
    • C03C4/06—Compositions for glass with special properties for photosensitive glass for phototropic or photochromic glass
    • 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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
    • C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
    • C03C3/074—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron containing zinc

Abstract

1501820 Borosilicate glass CARL-ZEISSSTIFTUNG [trading as JENAER GLASWERK SCHOTT & GEN] 4 May 1976 [7 May 1975] 18270/76 Addition to 1419644 Heading C1M A glass (A), suitable as a near portion glass for fusion to a photochromic distance portion in a multifocal lens, comprises a basis glass (X) to which may optionally be added a component (Y) to render the glass photochromic, the basis glass (X) comprising, in weight per cent the balance, if any, consisting of one or more compatible constituents except the constituents of component (Y), and component (Y), if present, consisting of, in weight per cent The refining agent may be As 2 O 3 . The glass may have a refractive index n d of at least 1À60 and a linear thermal expansion coefficient of 45-58 Î 10<SP>-7</SP>/‹ C.
GB1827076A 1975-05-07 1976-05-04 Glass Expired GB1501820A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752520260 DE2520260C3 (en) 1975-05-07 1975-05-07 Phototropic glass, suitable as a near-part material for fusing with photochromic far-part glasses, based on an optical glass of the SiO2 -B2 O3 -Al2 O3 -La2 O3 - (ZnO) system

Publications (1)

Publication Number Publication Date
GB1501820A true GB1501820A (en) 1978-02-22

Family

ID=5945941

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1827076A Expired GB1501820A (en) 1975-05-07 1976-05-04 Glass

Country Status (6)

Country Link
JP (1) JPS51134708A (en)
AT (1) AT349670B (en)
DE (1) DE2520260C3 (en)
FR (1) FR2333758A2 (en)
GB (1) GB1501820A (en)
IT (1) IT1058047B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1296941C (en) * 2003-06-11 2007-01-24 日本特殊陶业株式会社 Dielectric material and method of producing the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4211569A (en) * 1979-03-09 1980-07-08 Corning Glass Works High index ophthalmic glasses
DE3032580C2 (en) * 1980-08-29 1984-09-13 Deutsche Spezialglas Ag, 3223 Delligsen Phototropic multilayer glass and process for its manufacture
DE3117000C2 (en) * 1981-04-29 1986-05-28 Schott Glaswerke, 6500 Mainz Phototropic glass with a refractive index? 1.59, an Abbe number? 40 and a density &lE; 3.2 g / cm? 3?

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1296941C (en) * 2003-06-11 2007-01-24 日本特殊陶业株式会社 Dielectric material and method of producing the same

Also Published As

Publication number Publication date
DE2520260B2 (en) 1977-11-10
JPS51134708A (en) 1976-11-22
AT349670B (en) 1979-04-25
FR2333758B2 (en) 1979-07-13
ATA94576A (en) 1978-09-15
DE2520260A1 (en) 1976-11-18
JPS569458B2 (en) 1981-03-02
DE2520260C3 (en) 1978-07-13
IT1058047B (en) 1982-04-10
FR2333758A2 (en) 1977-07-01

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee