GB1419644A - Phototropic optical glass - Google Patents

Phototropic optical glass

Info

Publication number
GB1419644A
GB1419644A GB2305973A GB2305973A GB1419644A GB 1419644 A GB1419644 A GB 1419644A GB 2305973 A GB2305973 A GB 2305973A GB 2305973 A GB2305973 A GB 2305973A GB 1419644 A GB1419644 A GB 1419644A
Authority
GB
United Kingdom
Prior art keywords
glass
phototropic
basis
component
disclosed
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
GB2305973A
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.)
Schott AG
Carl Zeiss AG
Original Assignee
Jenaer Glaswerk Schott and Gen
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
Priority claimed from DE19722223629 external-priority patent/DE2223629C3/en
Application filed by Jenaer Glaswerk Schott and Gen, Carl Zeiss AG filed Critical Jenaer Glaswerk Schott and Gen
Publication of GB1419644A publication Critical patent/GB1419644A/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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/23—Photochromic filters
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive

Abstract

1419644 Phototropic glass CARL-ZEISSSTIFTUNG [trading as JENAER GLASWERK SCHOTT & GEN] 15 May 1973 [15 May 1972] 23059/73 Heading C1M [Also in Division C4] A phototropic glass (A) suitable as near or reading portion material for fusion with a phototropic distance portion glass (B) to obtain a multi-focal spectacle glass (C), the glass (A) being defined in terms of 100% of a basis glass to which has been added a component (Y) consisting of one or more additives as a percentage of the basis glass (X), the basis glass (X) comprising the following expressed as percentages by weight: 30-55% SiO 2 and/or B 2 O 3 , 0-8% alkali metal oxide(s), 16-54% Al 2 O 3 and/or La 2 O 3 , 0-25% ZnO and/or ZrO 2 and/or TiO 2 , 0-30% PbO, 0-8% alkaline earth metal oxide(s), 0-10% Bi 2 O 3 and/or Ta 2 O 5 and/or Nb 2 O 5 and/or WO 3 , 0-0À1% CuO, 0-0À02% CoO, 0À1-1À8% Ag 2 O; the balance, if any, consisting of one or more compatible constituents, e.g. nickel oxides, other than any of the hereinafter defined additive(s) of component (Y), and the component (Y) consisting of the following expressed as percentages by weight of the basis glass (X): 0À2-4À5% Cl, 0-4% Br and/or I, 0-4% F and 0-2% refining agent(s). Numerous specific examples are disclosed some of which are also characterized by reference to the molar content of the species present. The colour of the phototropic glass may be adapted to match as far as possible the colour in the distance portion glass. Specific coloured glasses disclosed are yellow, grey and brown. A suitable commercial distance portion glass (B) disclosed has the following composition expressed in weight per cent: 53À0% SiO 2 , 8À0% Al 2 O 3 , 15À1% B 2 O 3 , 2À0% Li 2 O, 2À0% K 2 O, 1À0% Na 2 O, 7À0% BaO, 4À0% MgO, 6À0% PbO, 1À0% ZrO 2 , 0À3% AgNo 3 , 1À0% Cl- and 1À0% Bu-.
GB2305973A 1972-05-15 1973-05-15 Phototropic optical glass Expired GB1419644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722223629 DE2223629C3 (en) 1972-05-15 Phototropic glass, suitable as a near-part material for fusing with photochromic far-part glasses based on an optical glass of the system SiO deep 2 -B deep 2 0 deep 3 -Al deep 2 0 deep 3 -La deep 2 0 deep 3 -PbO- (ZnO)

Publications (1)

Publication Number Publication Date
GB1419644A true GB1419644A (en) 1975-12-31

Family

ID=5844917

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2305973A Expired GB1419644A (en) 1972-05-15 1973-05-15 Phototropic optical glass

Country Status (6)

Country Link
JP (1) JPS549605B2 (en)
AT (1) AT338451B (en)
CA (1) CA1023187A (en)
FR (1) FR2184805B1 (en)
GB (1) GB1419644A (en)
IT (1) IT985902B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233642A (en) * 1989-05-31 1991-01-16 Zeiss Stiftung Optical glass with negative anomalous partial dispersion
US8361917B2 (en) 2010-08-05 2013-01-29 Schott Corporation Rare earth aluminoborosilicate glass composition

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2346296A1 (en) * 1976-03-31 1977-10-28 Corning Glass Works Multifocal glass lens mfr. - using photochromic glass fused to another glass and heat treated
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 ≦ 3.2 g / cm? 3?
JP2711618B2 (en) * 1992-06-30 1998-02-10 ティーディーケイ株式会社 Dielectric composition, multilayer wiring board and multilayer ceramic capacitor
CN114728837A (en) * 2019-11-14 2022-07-08 日本电气硝子株式会社 Glass article

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1246889A (en) * 1968-05-17 1971-09-22 Nippon Sheet Glass Co Ltd Phototropic glass
FR2104862A1 (en) * 1970-08-19 1972-04-21 Corning Glass Works Heat-darkenable photochromic glass - with lanthanum borate glass-phase contg silver halides and copper oxide

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233642A (en) * 1989-05-31 1991-01-16 Zeiss Stiftung Optical glass with negative anomalous partial dispersion
US5100843A (en) * 1989-05-31 1992-03-31 Schott Glaswerke Optical glass with negative anomalous partial dispersion
GB2233642B (en) * 1989-05-31 1992-09-02 Zeiss Stiftung Optical glass of negative anomalous part dispersion
US8361917B2 (en) 2010-08-05 2013-01-29 Schott Corporation Rare earth aluminoborosilicate glass composition

Also Published As

Publication number Publication date
FR2184805B1 (en) 1978-07-07
AT338451B (en) 1977-08-25
DE2223629B2 (en) 1975-12-04
FR2184805A1 (en) 1973-12-28
JPS4926314A (en) 1974-03-08
DE2223629A1 (en) 1973-12-06
ATA191173A (en) 1976-12-15
JPS549605B2 (en) 1979-04-26
CA1023187A (en) 1977-12-27
IT985902B (en) 1974-12-30

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Legal Events

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