CN105859131B - Crown optical glass - Google Patents

Crown optical glass Download PDF

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Publication number
CN105859131B
CN105859131B CN201610451296.8A CN201610451296A CN105859131B CN 105859131 B CN105859131 B CN 105859131B CN 201610451296 A CN201610451296 A CN 201610451296A CN 105859131 B CN105859131 B CN 105859131B
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glass
optical glass
crown optical
sio
crown
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CN105859131A (en
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毛露路
孙伟
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Chengdu Guangming Optoelectronics Co Ltd
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Chengdu Guangming Optoelectronics Co Ltd
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    • 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/097—Glass compositions containing silica with 40% to 90% silica, by weight containing phosphorus, niobium or tantalum
    • 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

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  • 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)
  • Ceramic Engineering (AREA)
  • Glass Compositions (AREA)

Abstract

The present invention provide a kind of refractive index be 1.48-1.54, the crown glass that Abbe number is 55-68, do not contain CeO in the glass ingredient2.The weight percent composition of crown optical glass, oxide includes: SiO257-75%, B2O36-15%, K2O 7-17%, Na2O 6-14%, Li2O 0-3%, TiO20-1%, Nb2O50.1-3%.The present invention is designed by reasonable component proportion, and in the case where the spectrophotometric data for guaranteeing to need, optical glass transmitance with higher is anti-Japanese good according to performance, while high temperature viscosity is small, is easy to clarify, and has preferable weatherability.

Description

Crown optical glass
Technical field
The present invention relates to a kind of crown optical glasses, and more particularly, to a kind of refractive index be 1.48-1.54, Abbe number is 55-68 and ultraviolet crown optical glass high and with higher resistance to sunshine performance to visible waveband transmitance.
Background technique
The optical glass that refractive index is 1.48-1.54, Abbe number is 55-68 belongs to crown optical glass, and such glass is big Amount is applied in all kinds of optical devices.Generally, the crown optical glass of photosensitiveness within the above range is in sunlight and its height After density light beams irradiation, transmitance is especially serious from ultraviolet to the decaying of 400nm wave band.If the comparison glass 1 in the following table 1 is one The more representative crown glass of kind, refractive index 1.516, Abbe number 64, specific ingredient are shown in Table 1.Its After carrying out resistance to sunshine experiment under JOGIS04-1994 standard rated condition, the transmitance decline 30% at 320nm of 10mm sample is left The right side, at 400nm decline 6%, such fall for need work in the optical system of 300nm-400nm wave band for It is unacceptable.But due to the characteristic of crown glass material, transmitance under the action of long-term sunshine especially ultraviolet light It can decline, especially near 320nm, fall is maximum.
Table 1: comparison 1 refractive index Abbe number of glass and component situation
Refractive index Abbe number SiO2 B2O3 Al2O3 Sb2O3 BaO CaO K2O Na2O
1.516 63.8 67.1 7.2 0.3 0.1 7.2 2.0 15.2 1.0
Therefore, research how rational proportion glass ingredient so that crown glass material 300nm-400nm ultraviolet band both There is higher transmitance, while long-time service decaying is smaller under the action of sunshine and ultraviolet light again, for needing work to exist The performance boost of the optical system of 300-400nm wave band is that have biggish meaning.
In general, such crown optical glass is since visible-range (400nm-700nm wave band) transmitance is compared with other Optical glass is high, is commonly used to fabricate and requires transmitance high optical element, such as pentaprism, light combination mirror optical element.
In recent years, with laser display technology, the development of high-brightness projection technology, ultraviolet imagery technology, the energy of light source Density is further promoted, and such crown glass long-term work under high density luminous energy, transmitance can compare as described above Glass 1, drastically reduces, and answers to limit such glass in laser display, high-brightness projection, ultraviolet imagery field With.
In the prior art, a small amount of CeO is usually added in glass2Promote the resistance to sunshine performance of glass, such as Optical glass disclosed in US95119393.7 and CN201110377843.CeO2Although the resistance to sunshine performance to glass mentions It rises, but minimal amount of CeO2After addition, glass deteriorates rapidly from ultraviolet band to the transmitance of 450nm wave band, at 300nm wavelength It is unable to transmitted light, interior transmitance is generally 98% hereinafter, if CeO at 400nm2When adding excessive, glass even becomes yellow Color is not suitable for using to from the ultraviolet optical system for requiring high transmittance requirement to visible waveband.
The transmitance of such crown optical glass is also related with process conditions in addition to having outside the Pass with component.Optical glass exists Need to exclude the bubble in glass in production process using high temperature clarification process, high temperature clarification is generally completed in platinum dish. Clarifying temp is higher, stronger to the corrosivity of platinum dish, platinum element can more be dissolved into glass become platinum ion, platinum from Son has strong absorption to 360nm-460nm wave band light, will cause glass phase and the transmitance of wave band is answered to decline.Therefore, in research glass When glass forms, needs to consider to reduce the high temperature viscosity of glass, glass is enable to exclude bubble under lower clarifying temp, thus Improve the transmitance of glass.From the point of view of long-term production practices, if such crown glass viscosity at a temperature of 1400 DEG C is lower than 150dPaS, it will be able to obtain transmitance and bubble degree is able to satisfy the product of requirement.
In addition, weatherability (the C in the following process that such crown glass also needs to consider glass when component designsR) refer to Mark.If weatherability (the C of glassR) grade is lower, durings cleaning, drying, transport etc., polished glass workpiece surface holds Easily scrapped by the vapor corrosion in air.From the point of view of production practices, for such glass, meet 2 grades and its above Weatherability is less prone to problem during following process.
Summary of the invention
Technical problem to be solved by the invention is to provide the crowns that a kind of refractive index is 1.48-1.54, Abbe number is 55-68 Board glass does not contain CeO in the glass ingredient2, ultraviolet-visible optical band transmitance is high, is provided simultaneously with higher resistance to sunshine Energy.
The technical proposal for solving the technical problem of the invention is: crown optical glass, the weight percent of oxide It include: SiO than composition257-75%, B2O36-15%, K2O 7-17%, Na2O 6-14%, Li2O 0-3%, TiO2 0- 1%, Nb2O50.1-3%.
Further, further includes: Al2O30-5%, ZnO 0-4%, MgO 0-4%, CaO 0-4%, BaO 0-4%, SrO 0-4%, Sb2O30-1%.
Further, in which: Al2O30-2% and/or ZnO 0.1-3% and/or MgO 0-3% and/or CaO 0-3% And/or BaO 0-3% and/or SrO 0-3% and/or Sb2O30-0.5%.
Further, in which: Al2O30-1% and/or ZnO 0.1-2% and/or BaO 0-2%.
Further, in which: SiO260-70% and/or B2O38-12% and/or K2O 8-16% and/or Na2O 7- 12% and/or Li2O 0-1.5% and/or TiO20-0.5% and/or Nb2O50.1-2%.
Further, in which: K2O 8-13% and/or Na2O 7-11% and/or Li2O 0-0.5% and/or Nb2O5 0.4-1.5%.
Further, in which: (SiO2+B2O3)/(Na2O+K2O+Li2It O is) 3-5, preferably 3.5-4.5, further preferably 3.8-4.3。
Further, in which: SiO2/B2O3For 4-11, preferably 5-8, further preferred 5.5-7.
Further, in which: Na2O/K2O is 0.5-1.2, preferably 0.7-1.2.
Further, in which: TiO2/Nb2O5Less than 0.8, preferably smaller than 0.5, it is further preferably no larger than 0.3.
Further, τ 300nm (10mm) is greater than or equal to 30%, τ 400nm (10mm) and is greater than or equal to 99%.
Further, saturating outside 10mm sample after according to resistance to sunshine experiment is carried out under JOGIS04-1994 standard rated condition It crosses rate to decline at 320nm no more than 8%, decline is no more than 2% at 400nm.
Further, viscosity is lower than 150dPaS at a temperature of 1400 DEG C.
Further, against weather be 2 grades and its more than.
The beneficial effects of the present invention are: the present invention is designed by reasonable component proportion, CeO is not added2Component is guaranteeing In the case where the spectrophotometric data needed, optical glass transmitance with higher is anti-Japanese good according to performance, while high temperature viscosity It is small, it is easy to clarify, and have preferable weatherability.
Specific embodiment
Each component of glass of the present invention is described below, unless otherwise indicated, the content of each component is with weight % It indicates.
In glass system of the invention, SiO2It is that glass primarily forms body, is the main component for constituting glass skeleton.If Its content is higher than 75%, and the refractive index of glass can be lower than expected design, while glass raw material dissolution can become more difficult；If its Content is lower than 57%, the transmitance of glass, it is anti-Japanese shine performance, weatherability can decline.Therefore, in the present invention, SiO2Contain Amount is 57-75%, preferably 60-70%.
B2O3It is also one of glass former, suitable B is added in such glass2O3It can be by the skeleton structure of glass Become finer and close, improves the refractive index, transmitance, anti-Japanese photograph performance and weatherability of glass.Meanwhile B2O3It is also a kind of hydrotropy Agent can be such that dissolution of raw material becomes easier to.In glass system of the invention, if B2O3Content is higher than 15%, B2O3In glass In coordination structure can change to open structure, thus reduce glass it is anti-Japanese shine performance and weatherability；If its content is lower than 6%, solubilization-aid effect is unobvious, while can reduce the resistance to sunshine performance and weatherability of glass.Therefore, B2O3Content be set as 6- 15%, preferably 8-12%.
SiO2With B2O3It is the Network former of glass, but its structure formed in glass is inconsistent.According to material Expect that structure determines the principle of material property, the proportionate relationship of two kinds of Network formers and the internal structure of glass are closely related.? That is in glass system of the present invention, SiO2With B2O3Proportionate relationship and the solubility property of glass, weatherability, resistance to sunshine There can be substantial connection.Through the present inventor the study found that working as SiO2/B2O3Value when being 4-11, the solubility property of glass, weatherability, Resistance to sunshine performance balances the most, and preferably its ratio is 5-8, further preferably 5.5-7.
Li2O、K2O、Na2O belongs to alkali metal oxide, and the main net of glass can be interrupted by being added in silicate glass system Network reduces the high temperature viscosity of glass, keeps the production of glass more easy.In glass system of the present invention, suitable alkali metal oxygen The addition of compound be it is necessary, expected high temperature viscosity can be obtained, meanwhile, as suitable alkali metal oxide and B2O3Altogether When depositing, B can be improved2O3The consistency of network, relative to without B2O3Silicate glass for, better light can be obtained Transmitance, resistance to sunshine and weatherability.
Very few alkali metal oxide is unable to adjust the viscosity of glass to suitable range, and excessive alkali metal oxide Devitrification resistance energy, light transmission rate, resistance to sunshine performance and the weatherability of glass can be sharply destroyed again.Therefore, in vitreum of the present invention In system, Na2The content of O is 6-14%, preferably 7-12%, further preferably 7-11%.K2The content of O is 7-17%, preferably For 8-16%, further preferably 8-13%.
Relative to Na2O and K2O, Li2The concentration effect of O is stronger, and price is more expensive.It is excessively added and will lead to glass devitrification resistance The sharply deterioration of energy and cost rapid increase.Therefore, Li2The content of O be 0-3%, preferably 0-1.5%, more preferable 0-0.5, It is still more preferably not add.
Further, the effect of alkali metal oxide mainly interrupts SiO2Fine and close network is viscous to obtain suitable high temperature Degree, while the solution temperature of mixture can be reduced.At the same time, alkali metal oxide can give B2O3、TiO2、Al2O3In Between oxide body free oxygen is provided, densify glass network, to improve oxygen bridge number in glass, and then the light of raising glass Transmitance, resistance to sunshine and weatherability.SiO as Network former2、B2O3Component and alkali metal oxide component have closely Conspiracy relation, as satisfaction (SiO2+B2O3)/(Na2O+K2O+Li2O when value) is 3-5, the high temperature viscosity of glass, transmitance, The performances such as devitrification resistance energy, weatherability can be very good to be balanced, so that preferable glass is formed, when its ratio is 3.5- When 4.5, the above performance balances the most, and further preferred ratio is 3.8-4.3.
Further, through the present inventor's the study found that a kind of independent effect ratio for adding alkali metal oxide while adding The effect of two or three of alkali metal oxide is added to want poor.It is worth noting that, working as Na2O/K2When the value of O is 0.5-1.2, glass Performance is best, while glass surface bright and clean, and preferably its ratio is 0.7-1.2.
A small amount of Al2O3The network consistency, weatherability and resistance to sunshine that glass can be improved is added, while adjustable The refractive index and dispersion of glass.But excessive Al is added2O3, will lead to glass biodissolution difficulty, high temperature viscosity rises, glass abrasion Degree, which rises, causes processing efficiency to decline.It is particularly noteworthy that there is B in glass2O3In the case where, excessive Al2O3Group Branch leads to Al2O3Preferentially capture free oxygen, makes B2O3Network develops to open structure, and then makes the weatherability and anti-analysis of glass Brilliant performance decline.In addition, in order to reduce the solution temperature of raw material, the Al of such glass2O3Generally use Al (OH)3Form draw Enter.Due to current Al (OH)3The limitation of production technology, Al (OH)3In iron tramp be not easy that removal is clean, and additional amount can excessively be led Cause transmitance rapid degradation.Therefore, Al2O3Content be 0-5%, preferably 0-2%, further preferred 0-1%.
The refractive index and dispersion of the adjustable glass of a small amount of ZnO, while the surface smoothness of glass can be improved, it improves The weatherability of glass reduces the high temperature viscosity of glass.But excessive ZnO, which will lead to the refractive index of glass and dispersion, cannot reach pre- Phase, while will lead to glass surface tension in clarification and increasing, bubble is not easy to exclude.Therefore, the content of ZnO is 0-4%, excellent It is selected as 0.1-3%, further preferred 0.1-2%.
A small amount of Nb2O5The refractive index and dispersion that glass can be improved, promote the resistance to sunshine of glass, while from ultraviolet waves Section decays smaller to 480nm transmitance.But excessive Nb is added2O5It will lead to the refractive index of glass and dispersion be not achieved design and want It asks, while glass cost increase.Even more noteworthy, if additive amount is excessive, glass is in from ultraviolet band to 480nm transmitance Index decreased is not able to satisfy the transmitance requirement to material of certain ultraviolet optics systems.Therefore, Nb2O5Content be 0.1- 3%, preferably 0.1-2%, further preferred 0.4-1.5%.
A small amount of TiO2The refractive index and dispersion of glass can be improved, and improve the resistance to sunshine of glass and weather-proof simultaneously Property.But excessive addition will lead to glass and drastically reduce from ultraviolet band to 480nm transmitance, reduce speed ratio Nb2O5Component rises Reduction speed faster, to be not easy to obtain high transmittance product.Especially in the actual production process, if melting outside gas Atmosphere fluctuates, the TiO in component2Easily recurring structure changes, and causes the transmitance of glass unstable, and product quality is unstable It is fixed.Therefore, TiO2Content be 0-1%, preferably 0-0.5% do not add further preferably.
Nb2O5And TiO2It is remarkably improved the resistance to sunshine of glass system of the present invention, if two kinds of components are deposited simultaneously in glass When, TiO need to be met2/Nb2O5Value less than 0.8, preferably smaller than 0.5, more preferably less than 0.3 when, the resistance to sunshine performance of glass It is balanced the most with from ultraviolet band to 480nm transmitance.
BaO, SrO, CaO, MgO belong to alkaline earth oxide, and the refractive index and color of adjustable glass in glass is added It dissipates, the stability of reinforcing glass.Excessive alkaline earth oxide will lead to the refractive index of glass and dispersion does not reach requirement, together When glass shortwave transmitance and weatherability can decline.As needed to add a small amount of alkaline-earth metal oxide in glass system of the present invention Object preferably adds a small amount of BaO in terms of cost and performance.BaO content is limited to 0-4%, preferably 0-3%, into One step is preferably 0-2%.SrO content is limited to 0-4%, preferably 0-3%, does not add further preferably.CaO content limits For 0-4%, preferably 0-3%, do not add further preferably.Content of MgO is limited to 0-4%, preferably 0-3%, further It does not add preferably.
Sb2O3It is a kind of clarifying agent, being added in glass makes bubble elimination become to be more easier.In the present invention, content It is limited to 0-1%, preferably 0-0.5%, is not added further preferably.
The performance of optical glass of the invention is described below:
Refractive index and Abbe number are tested according to 7962.1-2010 prescriptive procedure of GB/T.
Transmitance is surveyed according to 7962.12-2010 prescriptive procedure of GB/T at 300nm, 400nm wavelength of 10mm thickness sample Examination.
High temperature viscosity is measured using high-temperature viscosimeter, and numerical value unit is dPaS, and the smaller expression viscosity of numerical value is smaller.
Weatherability test is will to polish sample test initial haze, is placed into weatherability case, under 90% humidity, temperature It under conditions of 40-50 DEG C of circulation primary per hour, tests 30 hours, then using turbid after spherical nephelometer test sample test Degree, turbidity difference △ H is bigger, indicates that its weatherability is poorer, and table 2 is weatherability hierarchical table.
Table 2: weatherability hierarchical table
The glass stability of resistance to sunshine is pressed under JOGIS04-1994 standard conditions, and 10mm thickness sample irradiation 4 hours passes through ratio Compared with the spectral transmittance curve before irradiation and after irradiation, determine glass in the attenuation of each wavelength.The spectral transmission of glass Rate curve uses spectrophotometer measurement.
By test, optical glass of the invention is had the following performance: refractive index 1.48-1.54, Abbe number 55- 68；In at 300nm wavelength transmitance be greater than or equal to 30%, 400nm wavelength in transmitance be greater than or equal to 99%；1400℃ At a temperature of viscosity be lower than 150dPaS；Weatherability be 2 grades and its more than；Abrasion degree is between 70-130；In JOGIS04-1994 Under standard conditions, 10mm thickness sample irradiation 4 hours, outer transmitance decline is no more than at 8%, 400nm under outer transmitance at 320nm Drop is no more than 2%.
In order to further appreciate that technical solution of the present invention, the embodiment of optical glass of the present invention is described below.It should It is noted that there is no limit the scope of the present invention for these embodiments.
The optical glass (embodiment 1-20) shown in table 3-4 is by the ratio according to each embodiment shown in table 3-4 It weighs and hybrid optical glass is with common raw material (such as oxide, hydroxide, carbonate, nitrate), mixed raw material is put It sets in platinum crucible, melts 2.5-4 hours in 1300-1400 DEG C, and after clarified, stirring and homogenizing, do not had Bubble and homogeneous melt glass without undissolved substance casting mold and anneal this melten glass in mold.
The composition of 1-20 of the embodiment of the present invention is indicated in table 3-4；Refractive index (nd)；Abbe number (vd)；In at 300nm wavelength Transmitance (τ 300nm)；Transmitance (τ 400nm) at 400nm wavelength；Weatherability (CR)；Viscosity F table at a temperature of 1400 DEG C Show；By under JOGIS04-1994 standard conditions, 10mm thickness sample irradiation 4 hours, outer transmitance declines percentage A at 320nm It indicates；Outer transmitance decline percentage is indicated with B at 400nm；(SiO2+B2O3)/(Na2O+K2O+Li2O value) is indicated with K1； SiO2/B2O3Value indicated with K2；Na2O/K2The value of O is indicated with K3；TiO2/Nb2O5Value indicated with K4.
Table 3
Wt% 1 2 3 4 5 6 7 8 9 10
SiO2 68.00 67.80 67.70 67.60 68.00 68.00 60.00 74.00 68.00 68.00
B2O3 10.30 10.30 10.20 10.20 10.30 10.50 14.00 7.00 10.30 10.30
Nb2O5 0.50 0.80 1.00 1.20 0.30 0.50 0.50 0.50 0.50 0.50
TiO2 0.00 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Al2O3 0.20 0.20 0.20 0.10 0.10 0.20 0.50 1.00 0.20 0.20
ZnO 0.20 0.20 0.20 0.10 0.20 0.20 1.90 0.00 0.00 0.00
BaO 1.20 1.00 1.00 1.20 1.20 1.00 3.00 0.00 0.00 0.00
CaO 0.00 0.00 0.00 0.00 0.30 0.00 0.00 0.00 0.00 0.70
SrO 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.40 0.00
MgO 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.70
Li2O 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.40 0.00 0.00
Na2O 8.90 8.90 8.00 8.90 8.80 9.20 10.00 7.00 8.90 8.90
K2O 10.60 10.60 11.60 10.60 10.70 10.30 10.00 10.00 10.60 10.60
Sb2O3 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10
It is total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00
K1 4.02 4.01 3.97 3.99 4.02 4.03 3.70 4.66 4.02 4.02
K2 6.60 6.58 6.64 6.63 6.60 6.48 4.29 10.57 6.60 6.60
K3 0.84 0.84 0.69 0.84 0.82 0.89 1.00 0.70 0.84 0.84
K4 0.00 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Nd 1.51578 1.51827 1.51819 1.51877 1.51531 1.51632 1.53218 1.50012 1.51423 1.51310
Vd 63.63 63.28 63.55 62.88 63.99 64.25 63.00 65.25 63.20 63.80
CR 1 1 1 1 1 1 1 1 1 1
F(dPaS) 65 60 70 61 63 55 40 110 70 58
τ 300nm (%) 62.5 36.0 39.2 40.0 68.1 61.1 39.4 71.0 61.0 61.3
τ 400nm (%) 99.5 99.5 99.5 99.5 99.6 99.6 99.5 99.7 99.6 99.6
A (%) 7.2 5.9 7.3 5.8 7.0 7.0 7.1 6.8 7.0 6.8
B (%) 1.4 0.7 0.5 0.5 1.8 1.1 1.4 1.1 1.2 1.4
Table 4
Wt% 11 12 13 14 15 16 17 18 19 20
SiO2 67.80 72.00 70.00 61.20 65.00 67.00 68.00 66.00 66.00 66.60
B2O3 10.30 9.00 11.00 7.30 13.70 11.30 10.30 12.30 12.30 10.30
Nb2O5 1.00 0.50 0.80 1.00 0.80 0.50 0.60 0.50 0.50 0.70
TiO2 0.05 0.10 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.05
Al2O3 0.20 1.00 0.00 0.50 0.30 0.20 0.20 0.20 0.00 0.15
ZnO 0.00 0.00 0.00 3.10 0.00 0.20 0.20 0.20 0.40 0.40
BaO 1.00 0.00 0.00 3.00 1.00 1.20 1.00 0.30 1.00 2.20
CaO 0.00 0.00 0.00 3.00 0.00 0.00 0.00 0.00 0.00 0.00
SrO 0.00 0.00 1.00 2.00 0.00 0.00 0.00 0.00 0.00 0.00
MgO 0.00 0.00 0.00 1.00 0.00 0.00 0.00 0.00 0.00 0.00
Li2O 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Na2O 8.95 7.30 7.30 7.30 9.10 8.90 9.00 9.60 9.10 8.90
K2O 10.60 10.00 9.70 10.50 10.00 10.60 10.60 10.80 10.60 10.60
Sb2O3 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10
It is total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00
K1 3.99 4.68 4.76 3.85 4.12 4.02 3.99 3.84 3.97 3.94
K2 6.58 8.00 6.36 8.38 4.74 5.93 6.60 5.37 5.37 6.47
K3 0.84 0.73 0.75 0.70 0.91 0.84 0.85 0.89 0.86 0.84
K4 0.05 0.20 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.07
Nd 1.51812 1.50623 1.51538 1.53500 1.52260 1.51712 1.51524 1.51823 1.51912 1.52102
Vd 63.01 65.00 64.90 59.87 64.30 63.42 63.70 63.88 63.31 62.10
CR 1 1 1 1 1 1 1 1 1 1
F((dPaS)) 68 100 120 45 50 63 65 53 52 55
τ 300nm (%) 45.0 48.0 45.0 42.0 59.0 61.5 63.5 62.5 61.6 58.0
τ 400nm (%) 99.5 99.7 99.5 99.4 99.6 99.5 99.5 99.5 99.6 99.5
A (%) 6.0 5.5 5.6 5.8 6.2 7.0 6.9 7.0 6.9 5.8
B (%) 0.6 0.4 0.5 0.9 1.0 1.3 1.2 1.3 1.0 0.6

Claims (20)

1. crown optical glass, which is characterized in that the weight percent composition of its oxide includes: SiO257-75%, B2O3 6-15%, K2O 7-17%, Na2O 6-14%, Li2O 0-3%, TiO20-1%, Nb2O50.1-3%, wherein TiO2/ Nb2O5Less than 0.8, CeO is not contained2。
2. crown optical glass as described in claim 1, which is characterized in that further include: Al2O30-5%, ZnO 0-4%, MgO 0-4%, CaO 0-4%, BaO 0-4%, SrO 0-4%, Sb2O30-1%.
3. crown optical glass as claimed in claim 2, which is characterized in that wherein: Al2O30-2% and/or ZnO 0.1- 3% and/or MgO 0-3% and/or CaO 0-3% and/or BaO 0-3% and/or SrO 0-3% and/or Sb2O30-0.5%.
4. crown optical glass as claimed in claim 2, which is characterized in that wherein: Al2O30-1% and/or ZnO 0.1- 2% and/or BaO 0-2%.
5. crown optical glass as described in claim 1, which is characterized in that wherein: SiO260-70% and/or B2O3 8- 12% and/or K2O 8-16% and/or Na2O 7-12% and/or Li2O 0-1.5% and/or TiO20-0.5% and/or Nb2O5 0.1-2%.
6. crown optical glass as described in claim 1, which is characterized in that wherein: K2O 8-13% and/or Na2O 7-11% And/or Li2O 0-0.5% and/or Nb2O50.4-1.5%.
7. crown optical glass as described in claim 1, which is characterized in that wherein: (SiO2+B2O3)/(Na2O+K2O+Li2O) For 3-5.
8. crown optical glass as described in claim 1, which is characterized in that wherein: (SiO2+B2O3)/(Na2O+K2O+Li2O) For 3.5-4.5.
9. crown optical glass as described in claim 1, which is characterized in that wherein: (SiO2+B2O3)/(Na2O+K2O+Li2O) For 3.8-4.3.
10. crown optical glass as described in claim 1, which is characterized in that wherein: SiO2/B2O3For 4-11.
11. crown optical glass as described in claim 1, which is characterized in that wherein: SiO2/B2O3For 5-8.
12. crown optical glass as described in claim 1, which is characterized in that wherein: SiO2/B2O3For 5.5-7.
13. crown optical glass as described in claim 1, which is characterized in that wherein: Na2O/K2O is 0.5-1.2.
14. crown optical glass as described in claim 1, which is characterized in that wherein: Na2O/K2O is 0.7-1.2.
15. crown optical glass as described in claim 1, which is characterized in that wherein: TiO2/Nb2O5Less than 0.5.
16. crown optical glass as described in claim 1, which is characterized in that wherein: TiO2/Nb2O5Less than 0.3.
17. the crown optical glass as described in claim 1-16 any claim, which is characterized in that 10mm thickness sample Transmitance is tested according to 7962.12-2010 prescriptive procedure of GB/T at 300nm and 400nm wavelength, and τ 300nm is greater than or equal to 30%, τ 400nm are greater than or equal to 99%.
18. the crown optical glass as described in claim 1-16 any claim, which is characterized in that according to JOGIS04- After carrying out resistance to sunshine experiment under 1994 standard rated conditions, the outer transmitance of 10mm sample declines at 320nm is no more than 8%, Decline is no more than 2% at 400nm.
19. the crown optical glass as described in claim 1-16 any claim, which is characterized in that glued at a temperature of 1400 DEG C Degree is lower than 150dPaS.
20. the crown optical glass as described in claim 1-16 any claim, which is characterized in that against weather is 2 grades More than and its.
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CN106396373A (en) * 2016-08-26 2017-02-15 湖北戈碧迦光电科技股份有限公司 Functional optical glass, and preparation method and applications thereof
CN106495469B (en) * 2016-11-07 2020-02-07 成都光明光电股份有限公司 Dense crown optical glass
CN111877940A (en) * 2020-08-05 2020-11-03 重庆大学 Novel separation infrared ray heat preservation glass of making an uproar that falls
CN112939455B (en) * 2021-03-23 2022-04-15 成都光明光电股份有限公司 Optical glass, optical element and optical instrument
CN113336437B (en) * 2021-06-01 2022-07-05 中国建筑材料科学研究总院有限公司 Optical glass with high photoinduced refractive index change, optical fiber prepared from optical glass, and preparation method and application of optical fiber
CN113307490B (en) * 2021-06-01 2022-07-05 中国建筑材料科学研究总院有限公司 Optical glass with high photoinduced refractive index change, optical fiber prepared from optical glass, and preparation method and application of optical fiber

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DE2626541A1 (en) * 1976-06-14 1977-12-15 Leitz Ernst Gmbh LOW DENSITY OPTICAL FLINT GLASS
DE19828992C1 (en) * 1998-06-29 1999-10-07 Schott Glas Lead-free optical glass of barium light flint glass, barium crown glass, crown glass, crown flint glass or boron crown glass type

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