CN1152836C - Lead-free optic glass - Google Patents

Lead-free optic glass Download PDF

Info

Publication number
CN1152836C
CN1152836C CNB991251458A CN99125145A CN1152836C CN 1152836 C CN1152836 C CN 1152836C CN B991251458 A CNB991251458 A CN B991251458A CN 99125145 A CN99125145 A CN 99125145A CN 1152836 C CN1152836 C CN 1152836C
Authority
CN
China
Prior art keywords
glass
weight
bao
lead
sio
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 - Lifetime
Application number
CNB991251458A
Other languages
Chinese (zh)
Other versions
CN1252391A (en
Inventor
U・科尔贝格
U·科尔贝格
布斯基
D·格拉布斯基
死-特鲁德威格
M·温克勒－特鲁德威格
S·沃夫
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
Original Assignee
Schott Glaswerke 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 Schott Glaswerke AG filed Critical Schott Glaswerke AG
Publication of CN1252391A publication Critical patent/CN1252391A/en
Application granted granted Critical
Publication of CN1152836C publication Critical patent/CN1152836C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths

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)
  • Glass Compositions (AREA)

Abstract

Lead-free optical glass having an Abbe number of 36-56 and a refractive index of 1.64-1.83 has the composition (in wt.% based on oxide): 10-25 SiO, 8-20 B2O3, 1-5 ZrO2, 1-5 TiO2, 10-30 La2O3, 30-50 BaO, 0.1-2 ZnO, 0.5-2 CaO, 0.1-2 WO3, 0.1-5 Nb2O5, 0.1-3 Y2O3, 0-1 Gd2O3, 0-1 Na2O, and 0-1 K2O.

Description

Lead-free optic glass
The present invention relates to refractive index n dBetween 1.64 and 1.83, and Abb (abbe number) v dLead-free optic glass between 36 and 56.
Because glass ingredient PbO and As 2O 3Be seen at issue as environmental pollutant in the public, in optical device manufacturers, the no lead glass that requirement has various optical properties, and then also preferred no As 2O 3Glass.
Replace plumbous oxide generally can not successfully reproduce optics and the glasswork performance that the desirable PbO of being subjected to influences with one or more components simply.Otherwise glass is formed and to be carried out newly developed or do more effective change when needing.
Patent documentation has disclosed the explanation that some optical values come from above-mentioned scope and form similar no lead glass, but these glass have multiple shortcoming.
Patent specification DE 2265703 C2 and US 3,958,999 disclose and have contained B 2O 3-Gd 2O 3-La 2O 3The opticglass of system.These glass need at least 2 weight % to be used to the Gd that makes the glass increased devitrification resistance stable to 50 weight % at the most 2O 3With this expensive components that so exists in a large number, make these glass very expensive.In specific embodiment, US 3,958, and 999 contain the also very expensive component Ta of at least 2 weight % in addition 2O 5
The glass of JP 61-146730 A and JP 60-221338 A need contain Li 2O, it has increased the tendency of they devitrifications.The glass of a specification sheets in back needs the Y of as many as 20 weight % in addition 2O 3La with as many as 52 weight % 2O 3, with the specific refractory power that obtains to wish, both are expensive component equally; It is uneconomical that this makes these glass costlinesses and pond formula make (tank production).
German patent specification DE 3201344 C2 disclose and have had 15～22 weight %TiO 2+ Nb 2O 5+ Y 2O 3Glass of high refractive index, it contains a high proportion of refractory compound (TiO 2) and expensive components (Nb 2O 5, Y 2O 3) and a large amount of CaO (4～18 weight %), BaO is unique optional member simultaneously, its maximum is 14 weight %.
The objective of the invention is to seek refractive index n dBetween 1.64 and 1.83 and Abb (abbe number) v dLead-free optic glass between 36 and 56, its low cost of manufacture and have good fusion and processing characteristics.This also comprises the crystallization-stable that needs are suitable.
Can reach this purpose by the glass of describing in the claim 1.
These glass contain the glass forming substances SiO of balanced proportions 2(10-25 weight %) and B 2O 3(8-20 weight %).Therefore, the meltability of these glass and their anti-chemical are all good.The meltability of these glass is because of increasing B 2O 3Content and improve, because of increasing SiO 2Content and worsen, but contain excessive B 2O 3With their anti-chemical of infringement.Described minimum B 2O 3The reduction of content will cause the glass tendency towards devitrification too to increase.
These glass contain BaO 30～50 weight %.In order to obtain desirable Abb scope, need the BaO of this content.Especially because of the B of the equal amount that contains relative BaO content 2O 3And SiO 2, the meltability of these glass is good especially.Except that BaO, these glass also contain the CaO of 0.5～2 weight % and the ZnO of 0.1～2 weight %.They have increased the crystallization-stable of these glass with the existence of BaO.
These glass contain TiO 2And ZrO 2, they account for the ratio of 1～5 weight % respectively.These two kinds of components improve anti-chemical, especially alkali-resistivity.When content is higher, will reduce crystallization-stable.
These glass particularly preferably contain the ZrO of similar proportion 2And TiO 2This can pass through preferred ZrO 2/ TiO 2Weight ratio is 0.8～1.0 expression.
These glass contain the La of 10～30 weight % 2O 3This scope is convenient to the optical states that obtains wishing, especially medium Abb and high refractive index.In addition, La 2O 3Increase the light transmission of glass and promote their crystallization-stable.Further increase La 2O 3Content will cause different n dAnd v dValue also unnecessarily makes the admixtion of this batch more expensive.
In order to change under high refractive index and critically to adjust low Abb, these glass contain 0.1～2 weight %WO 3, 0.1～5 weight % Nb 2O 5And the Y of 0.1～3 weight % 2O 3And also can contain the Gd of 1 weight % at the most 2O 3The total content of these 4 kinds of components is preferably greater than 5 weight %.
In order further to improve meltability, these glass also can contain the Na of 1 weight % at the most 2O and the K of 1 weight % at the most 2O.Higher content will increase the crystallization tendency.In like manner, omit Li fully 2O.
In described compositing range, glass can be divided into two groups according to specific refractory power:
The refractive index n of first group of glass dBetween 1.64 and 1.75, it contains the SiO of at least 25 weight % 2+ B 2O 3, and contain the BaO+La of 60 weight % at most 2O 3, La wherein 2O 3Maximum be 25 weight %.
The refractive index n of second group of glass dBetween 1.75 and 1.83.They contain the SiO of 25 weight % at the most 2+ B 2O 3, 10～17 weight % SiO 2B with 8～15 weight % 2O 3, and contain the BaO+La of 60 weight % at least 2O 3, La 2O 3Content be at least 15 weight %.
In the compositing range of main claim, be one group of refractive index n dBetween 1.71 and 1.75 and Abb v dGlass between 42 and 46, distinguishing them is according to their anti-chemical and their crystallization-stable.These glass are composed as follows:
SiO 215-21 (preferred especially 15～17);
B 2O 310-15 (preferred especially 12～15);
ZrO 21-4 (preferred especially 2～3);
TiO 21-4 (preferred especially 2～3);
Preferred SiO wherein 2+ ZrO 2+ TiO 219-23;
La 2O 315-25 (preferred especially 19～22);
BaO 30-43 wins (preferred especially 37～39);
ZnO 0.1-1；
CaO 0.5-1；
Wherein BaO+ZnO+CaO 〉=31 (preferred 37.6～41);
WO 3 0.1-1；
Nb 2O 52-5 (preferred especially 2～4);
Y 2O 3(0.1-2 preferred especially 0.5～1.5);
Gd 2O 3 0-1；
Y wherein 2O 3+ Gd 2O 3〉=0.2 (preferred 〉=0.6～2.5);
Na 2O 0-1；
K 2O 0-1；
Optical data with glass of described various preferred compositions is n dBetween 1.73 and 1.75, and v dBetween 44 and 46.
SiO 2And B 2O 3The weight ratio ((SiO of sum and BaO, ZnO and CaO sum 2+ B 2O 3)/(BaO+ZnO+CaO)) preferably between 0.5～1.In this scope, the crystallization-stable of glass is good especially.Especially for described preferred (1.71≤n d≤ 1.75,42≤v d≤ 46) glass, ratio≤1 beneficial especially; In them preferred at least 0.5 minimum value be met.Described particularly preferred glass (1.73≤n d≤ 1.75,44≤v d≤ 46) contain these components of equal amount like this, thereby made this ratio satisfy a little preferred range features.
In order to improve the quality of glass, can in this admixtion in batches, add the known finings of habitual amount own, to clarify these glass, in this way, the inner quality that these glass relate to no bubble and striped is good especially.
If used finings is not As 2O 3, but Sb for example 2O 3, because it may not can reduce the quality of glass, so crown glass of the present invention does not also contain arsenic.
Preferably, Sb 2O 3Content between 0.1～0.5 weight %.More preferably, except Sb 2O 3, these glass can randomly contain in addition 0.5 weight % at the most, have a fluorochemical of clarification equally.For example add CaF 2The perhaps fluorochemical of NaF.
Except the optical property of hope, glass of the present invention also has following advantage:
These glass do not contain PbO and also do not contain As in preferred embodiments 2O 3These glass crystallization-stables are good.This can carry out production continuously on the smelting furnace.In this production, the tolerance of enough crystallization-stables is the viscosity of glass upper limit devitrification.For continuous production, it should 〉=1000dPas.Glass this respect of the present invention is gratifying.Such glass crystallization-stable also makes further thermal treatment of glass, for example pressurization or compacting again.
These glass not only have good processing properties, and have good melting behaviour.This shows that also they have on about 1300 ℃ fusing point.
These glass have outstanding alkali-resistivity, and they are when having enough general anti-chemical, and the performance of alkali-resistivity rank AR=1 has proved this point.The anti-chemical of these glass is further processed it, for example grinds and polish very important.
Embodiment
Make 9 glass samples of the present invention by habitual raw material.
Table 2 has been listed these glass composition (based on the weight % of oxide compound), refractive index n separately d, Abb v d, the spectrum blue zone local dispersion values (partial dispersion) P G, FWith the local dispersion values Δ of abnormality P GF[10 -4], density p [g/cm 3], thermalexpansioncoefficient 20/300[10 -6/ K] and glass transformation temperature Tg[℃].
Following manufacturing is according to glass of the present invention: to the frit of oxide compound, be preferably in carbonate or the nitrate raw material and add finings, subsequently this admixtion of thorough mixing.In the smelting furnace of admixtion, melt this admixtion, clarification and homogenizing then well in melt temperature between 1220 ℃～1360 ℃.Pouring temperature is about 1050 ℃.
Table 1 has been listed the example of melt.
Table 1 is with the melt example of the glass of double centner calculating
Oxide compound Weight % Raw material Weight (kilogram)
SiO 2 10.0 SiO 2 9.22
B 2O 3 12.0 H 3BO 3 19.64
La 2O 3 15.0 La 2O 3 13.85
Gd 2O 3 0.45 Gd 2O 3 0.42
Y 2O 3 0.1 Y 2O 3 0.09
TiO 2 5.0 TiO 2 4.63
ZrO 2 3.0 ZrO 2 2.82
CaO 0.7 CaCO 3 1.14
ZnO 0.3 ZnO 0.28
BaO 50.0 BaCO 3 40.14
Ba(NO 3) 2 26.22
WO 3 0.6 WO 3 0.55
Nb 2O 5 2.75 Nb 2O 5 2.54
Sb 2O 3 0.2 Sn 2O 3 0.2
The performance of gained glass is listed in table 2, and embodiment 3, embodiment 6 and 7 are the compositions near the limit value of claimed compositing range, and has also represented the central extreme case about specific refractory power and Abb of embodiment.But their physicals is consistent with those performances of the glass of narrower preferred compositing range.
Table 2 glass is formed the key property of (based on the weight % of oxide compound) and described glass
1 2 3 4 5 6 7 8 9
SiO 2 16.15 20.0 10.0 20.0 16.25 11.0 24.9 10.0 16.55
B 2O 3 13.0 20.0 12.0 20.0 13.0 9.0 20.0 9.0 13.05
La 2O 3 20.8 25.0 15.0 15.0 20.7 29.0 10.0 30.0 21.8
Gd 2O 3 0.5 0.45 0.45 0.45 0.5 0.45 0.45 0.45 -
Y 2O 3 1.15 0.1 0.1 0.1 1.15 1.0 0.1 0.1 0.2
TiO 2 2.7 1.0 5.0 5.0 2.7 5.0 1.0 2.0 2.75
ZrO 2 2.3 1.65 3.0 2.75 2.3 5.0 1.5 2.25 2.4
CaO 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7
ZnO 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3
BaO 38.2 30.0 50.0 30.0 38.2 32.75 40.0 39.5 28.1
WO 3 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6
Nb 2O 5 3.4 0.1 2.75 5.0 3.4 5.0 0.25 5.0 3.45
Sb 2O 3 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2
n d 1.7434 1.6868 1.7682 1.7130 1.7427 1.8231 1.6574 1.7952 1.7440
V d 44.59 52.82 40.52 42.81 44.56 37.84 54.74 41.22 44.85
P gF 0.5659 0.5509 0.5732 0.5685 0.5659 0.5773 0.5491 0.5700 0.5656
ΔP gF[10 -4] -29 -41 -24 -33 -30 -29 -26 -45 -27
ρ[g/cm 3] 3.74 3.95 4.50 3.80 3.73 4.26 3.74 4.77 4.30
α 20/300[10 -6]/K 8.05 7.85 10.51 7.25 8.02 9.25 7.64 10.47 9.10
Tg[℃] 676 645 596 646 676 695 648 643 653

Claims (13)

1, lead-free optic glass, its refractive index n dBetween 1.64 and 1.83 and Abb v dBetween 36 and 56, it is characterized in that it has following composition (in the weight % based on oxide compound), SiO 2 10-25 B 2O 3 8-20 ZrO 2 1-5 TiO 2 1-5 La 2O 3 10-30 BaO 30-50 ZnO 0.1-2 CaO 0.5-2 WO 3 0.1-2 Nb 2O 5 0.1-5 Y 2O 3 0.1-3 Gd 2O 3 0-1 Na 2O 0-1 K 2O 0-1
The habitual finings of the habitual amount that randomly contains.
2, according to the lead-free optic glass of claim 1, its refractive index n dBetween 1.64 and 1.75, it is characterized in that it has following composition (in the weight % based on oxide compound), SiO 2 10-25 B 2O 3 8-20 SiO wherein 2+B 2O 3 ≥25 ZrO 2 1-5 TiO 2 1-5 La 2O 3 10-25 BaO 30-50 La wherein 2O 3+BaO ≤ 60 ZnO 0.1-2 CaO 0.5-2 WO 3 0.1-2 Nb 2O 5 0.1-5 Y 2O 3 0.1-3 Gd 2O 3 0-1 Na 2O 0-1 K 2O 0-1
The habitual finings that randomly contains habitual amount.
3, according to the lead-free optic glass of claim 1, its refractive index n dBetween 1.75 and 1.83, it is characterized in that it has following composition (in the weight % based on oxide compound), SiO 2 10-17 B 2O 3 8-15 SiO wherein 2+B 2O 3 ≤25 ZrO 2 1-5 TiO 2 1-5 La 2O 3 15-30 BaO 30-50 La wherein 2O 3+BaO ≥60 ZnO 0.1～2 CaO 0.5-2 WO 3 0.1-2 Nb 2O 5 0.1-5 Y 2O 3 0.1～3 Gd 2O 3 0-1 Na 2O 0-1 K 2O 0-1
Randomly contain the habitual finings that passes through consumption.
4, according to the lead-free optic glass of claim 1, its refractive index n dBetween 1.71 and 1.75 and Abb v dBetween 42 and 46, it is characterized in that it has following composition (in the weight % based on oxide compound), SiO 2 15-21 B 2O 3 10-15 ZrO 2 1-4 TiO 2 1-4 La 2O 3 15-25 BaO 30-43 ZnO 0.1-1 CaO 0.5-1 BaO+ZnO+CaO wherein ≥31 WO 3 0.1-1 Nb 2O 5 2-5 Y 2O 3 0.1-2 Gd 2O 3 0-1 Y wherein 2O 3+Gd 2O 3 ≥0.2 Na 2O 0-1 K 2O 0-1
5,, it is characterized in that described weight ratio is according to the no aluminium opticglass of claim 4
Si O 2 + B 2 O 3 BaO + ZnO + CaO ≤ 1
6, according to the no aluminium opticglass of claim 4, its refractive index n dBetween 1.73 and 1.75 and Abb v dBetween 44 and 46, it is characterized in that it has following composition (in the weight % based on oxide compound), SiO 2 15-17 B 2O 3 12-15 ZrO 2 2-3 TiO 2 2-3 La 2O 3 19-22 BaO 37-39 ZnO 0.1-1 CaO 0.5-1 WO 3 0.1-1 Nb 2O 5 2-4 Y 2O 3 0.5-1.5 Gd 2O 3 0-1 Y wherein 2O 3+Gd 2O 3 ≥0.6
7, according to each lead-free optic glass in the claim 1 to 6, it is characterized in that WO 3+ Nb 2O 5+ Y 2O 3+ Gd 2O 3＞5 weight %.
8, according to each lead-free optic glass in the claim 1 to 6, it is characterized in that ZrO 2/ TiO 2Weight ratio between 0.8 and 1.0.
9, according to each no aluminium opticglass in the claim 1 to 6, it is characterized in that described glass contains the Sb of 0.1～0.5 weight % 2O 3
10, according to each lead-free optic glass in the claim 1 to 6, it is characterized in that described glass contains the fluorochemical of 0.5 weight % at the most.
11, according to each lead-free optic glass in the claim 1 to 6, it is characterized in that, they except unavoidable impurities, oxygen-free arsenic.
12, according to the no aluminium opticglass of claim 9, it is characterized in that, they except unavoidable impurities, oxygen-free arsenic.
13, according to the no aluminium opticglass of claim 10, it is characterized in that, they except unavoidable impurities, oxygen-free arsenic.
CNB991251458A 1998-10-19 1999-10-19 Lead-free optic glass Expired - Lifetime CN1152836C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998148077 DE19848077C1 (en) 1998-10-19 1998-10-19 Lead-free optical glass
DE19848077.6 1998-10-19

Publications (2)

Publication Number Publication Date
CN1252391A CN1252391A (en) 2000-05-10
CN1152836C true CN1152836C (en) 2004-06-09

Family

ID=7884901

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB991251458A Expired - Lifetime CN1152836C (en) 1998-10-19 1999-10-19 Lead-free optic glass

Country Status (7)

Country Link
JP (1) JP3347106B2 (en)
CN (1) CN1152836C (en)
DE (1) DE19848077C1 (en)
FR (1) FR2784676B1 (en)
GB (1) GB2342918B (en)
HK (1) HK1029098A1 (en)
MY (1) MY124408A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11306021B2 (en) 2018-11-26 2022-04-19 Owens Coming Intellectual Capital, LLC High performance fiberglass composition with improved elastic modulus
US11524918B2 (en) 2018-11-26 2022-12-13 Owens Corning Intellectual Capital, Llc High performance fiberglass composition with improved specific modulus

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100351193C (en) * 2002-08-20 2007-11-28 Hoya株式会社 Optical glass, prefabricated piece and making method optical element and making method thereof
US7314841B2 (en) * 2003-05-26 2008-01-01 Murata Manufacturing Co., Ltd. Porcelain composition
DE102004027119A1 (en) * 2003-06-06 2004-12-30 Schott Ag Production of a UV-absorbed glass used in the production of gas discharge lamps, fluorescent lamps, xenon lamps, LCD displays, computer monitors and telephone displays comprises melting a raw material and producing a melt
CN101003417B (en) * 2006-12-22 2011-05-11 成都光明光电股份有限公司 Environmental protective flint optical glass with heavy lanthanum and production method
JP2009143738A (en) * 2007-12-11 2009-07-02 Olympus Corp Optical glass and optical device using the same
JP2009143739A (en) * 2007-12-11 2009-07-02 Olympus Corp Optical glass and optical device using the same
JP2012126586A (en) * 2010-12-13 2012-07-05 Ohara Inc Optical glass, preform, and optical element
JP6096409B2 (en) * 2010-10-29 2017-03-15 株式会社オハラ Optical glass, preform and optical element
CN102674686B (en) * 2012-04-23 2014-07-16 湖北新华光信息材料有限公司 Optical glass
JP5767179B2 (en) * 2012-08-30 2015-08-19 株式会社オハラ Optical glass, preform and optical element
CN103771705B (en) * 2012-10-18 2017-02-15 成都光明光电股份有限公司 Environmentally-friendly optical glass
JP6553856B2 (en) * 2013-12-27 2019-07-31 株式会社オハラ Glass
CN104944767B (en) * 2014-03-26 2017-11-14 成都光明光电股份有限公司 High-refractive and high-dispersive optical glass
CN106467359A (en) 2015-08-14 2017-03-01 成都光明光电股份有限公司 Optical glass
JP6932423B2 (en) 2015-11-06 2021-09-08 株式会社オハラ Optical glass, preforms and optics
US10370289B2 (en) 2015-11-11 2019-08-06 Ohara Inc. Optical glass, preform, and optical element
CN109328182B (en) * 2016-06-29 2021-10-29 株式会社小原 Optical glass, preform and optical element
JP7096648B2 (en) * 2016-06-29 2022-07-06 株式会社オハラ Optical glass, preforms and optical elements
JP7027002B2 (en) * 2016-06-29 2022-03-01 株式会社オハラ Optical glass, preforms and optical elements
CN109790060A (en) * 2016-10-03 2019-05-21 株式会社小原 Optical glass, prefabricated component and optical element
JP7545192B2 (en) * 2016-10-03 2024-09-04 株式会社オハラ Optical glass, preforms and optical elements
JP7224099B2 (en) * 2016-10-03 2023-02-17 株式会社オハラ Optical glass, preforms and optical elements
US20210114918A1 (en) * 2017-02-01 2021-04-22 Ohara Inc. Optical glass, preform and optical element
JP7227693B2 (en) * 2017-08-31 2023-02-22 株式会社オハラ Optical glass, preforms and optical elements
JP7094095B2 (en) * 2017-11-29 2022-07-01 株式会社オハラ Optical glass, preforms and optical elements
CN112424134B (en) * 2018-07-18 2023-04-18 株式会社小原 Optical glass and optical element
CN110835229B (en) * 2018-08-17 2022-05-27 成都光明光电股份有限公司 Optical glass, glass preform, optical element and optical instrument having the same
CN109205616B (en) * 2018-11-21 2021-06-25 成都光明光电股份有限公司 Optical glass, glass preform, optical element and optical instrument
CN111977970B (en) * 2020-09-07 2022-04-15 成都光明光电股份有限公司 Optical glass and optical element
US11999651B2 (en) 2020-09-10 2024-06-04 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and low density
US11802073B2 (en) 2020-09-10 2023-10-31 Corning Incorporated Silicoborate and borosilicate glasses with high refractive index and low density
US11976004B2 (en) 2020-09-10 2024-05-07 Corning Incorporated Silicoborate and borosilicate glasses having high refractive index and high transmittance to blue light

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1317395A (en) * 1971-03-22 1973-05-16 Plessey Co Ltd Filter optical glass
DE2265703C2 (en) * 1971-07-30 1985-06-20 Hoya Glass Works, Ltd, Tokio/Tokyo Thorium oxide-free optical glass based on B? 2? 0? 3? -Gd? 2? 0? 3? -La? 2? 0? 3?
DE2237259A1 (en) * 1971-07-30 1973-02-01 Hoya Glass Works Ltd OPTICAL GLASSES
JPS5375210A (en) * 1976-12-17 1978-07-04 Obara Optical Glass Optical glass
DE3201344C2 (en) * 1982-01-18 1984-02-16 Schott Glaswerke, 6500 Mainz High refractive index optical glasses in the system SiO 2 -B 2 O 3 -Alkalioxid-Erdalkaloxid-La 2 O 3 -ZrO 2 -TiO 5 2-2 -Nb with refractive indices of 1.79 - 1.82, Abbezahlen? 32 and densities ≦ 4.0
JPS5950048A (en) * 1982-09-16 1984-03-22 Ohara Inc Optical glass
JPS60221338A (en) * 1984-04-12 1985-11-06 Ohara Inc Optical glass
JPS61146730A (en) * 1984-12-19 1986-07-04 Nippon Kogaku Kk <Nikon> Glass having high refractive index for spectacle lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11306021B2 (en) 2018-11-26 2022-04-19 Owens Coming Intellectual Capital, LLC High performance fiberglass composition with improved elastic modulus
US11524918B2 (en) 2018-11-26 2022-12-13 Owens Corning Intellectual Capital, Llc High performance fiberglass composition with improved specific modulus

Also Published As

Publication number Publication date
HK1029098A1 (en) 2001-03-23
DE19848077C1 (en) 2000-01-27
FR2784676B1 (en) 2002-07-19
MY124408A (en) 2006-06-30
GB2342918A (en) 2000-04-26
CN1252391A (en) 2000-05-10
JP2000128568A (en) 2000-05-09
GB2342918B (en) 2001-04-18
JP3347106B2 (en) 2002-11-20
GB9922412D0 (en) 1999-11-24
FR2784676A1 (en) 2000-04-21

Similar Documents

Publication Publication Date Title
CN1152836C (en) Lead-free optic glass
CN1269757C (en) Leadless and arsenicless La contained heavy silexite
JP3302892B2 (en) Optical glass
JP4059695B2 (en) Optical glass
US7737064B2 (en) Optical glass containing bismuth oxide
JP2668049B2 (en) Optical glass
JP3015078B2 (en) Optical glass for precision press
CN1204073C (en) Optical glass
US20030220182A1 (en) Optical glass and optical element made of the optical glass
JP2726310B2 (en) Optical glass for precision press molding
CN1099388C (en) Optical glass having negative abnormal dispersion
JPH1143344A (en) Optical glass
JP2007070194A (en) Optical glass
CN1269754C (en) Lead-free crown glass
CN1230395C (en) Leadless and non-arsenic flint-special glass
JP2616980B2 (en) Optical glass for precision press molding
CN101215083B (en) Optical glass for precision profiling
CN1121987C (en) Lead-free optical glasses
CN1207230C (en) Optical glass
JP4213293B2 (en) Lead-free lanthanum crown glass
CN1168682C (en) Lead-free dense and extra-dense optical barium crown glass
JPH09278479A (en) Optical glass for mold press
JP3015079B2 (en) Optical glass for precision press
JP2616958B2 (en) Optical glass for precision press molding
CN1215004C (en) Leadless optical glass

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: SCHOTT GLAS

Free format text: FORMER OWNER: SCHOTT SPEZIALGLAS GMBH

Effective date: 20050930

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20050930

Address after: Germany Mainz

Patentee after: Schott AG

Address before: The Federal Republic of Germany in Mainz

Patentee before: Schott Glas

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20040609