CN101857357B - Optical glass and optical element - Google Patents
Optical glass and optical element Download PDFInfo
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- CN101857357B CN101857357B CN 201010209112 CN201010209112A CN101857357B CN 101857357 B CN101857357 B CN 101857357B CN 201010209112 CN201010209112 CN 201010209112 CN 201010209112 A CN201010209112 A CN 201010209112A CN 101857357 B CN101857357 B CN 101857357B
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- opticglass
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- optical element
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Abstract
The invention discloses an optical glass and an optical element. The optical glass consists of the following components: 28 to 43 by weight percent of SiO2; 23 to 33 by weight percent of TiO2; 6 to 20 by weight percent of BaO; and 6 to 20 by weight percent of R2O; and R2O consists of K2O and/or Na2O. As shown by an experiment result, the optical glass is not added with clarificant, and does not need to be added with non-environment-friendly elements, the refractive index is 1.72 to 1.82, the Abbe number is 24 to 29, the corresponding wavelength is less than 420mm when the transmissivity is up to 80 percent, and thereby the need of modern imaging devices is satisfied.
Description
Technical field
The present invention relates to the glass technology field, more particularly, relate to a kind of opticglass and optical element.
Background technology
In recent years, along with increased popularity such as digital camera, digital camera, camera cell phones, the needs as the opticglass of its parts are continued to enlarge, and the performance of opticglass is also had higher requirement.
The existence of defectives such as the residual bubble in the opticglass, foreign matter brings very big harm especially for the opticglass of the image pickup optical system of image sensor for opticglass, therefore, needs to suppress generation of defects.For example, when frit fused, glass melt was corroded by container easily, and the some of container is blended in the glass as minuteness particle and fragmentation, thereby made opticglass produce foreign matter.So,, must shorten the fusion time of frit in order to suppress foreign matter generation of defects in the glass.But if shorten the fusion time of frit, the deaeration meeting in the glass melt becomes insufficient, can produce residual air blister defect.In order to suppress residual bubble, in frit, add Sb oxide compound and As oxide compound usually, the discharge of accelerating gas as finings.
But the introducing meeting of finings causes detrimentally affect to environment, and it need be used with nitrate salt usually, and this has just increased the quantity discharged of oxynitride.In the prior art, in order to eliminate glass blister, finingss such as conventional introducing Sb.Along with the reinforcement of international community's environmental consciousness, People more and more is paid attention to the discharging of pollutent in the control atmosphere, so, in opticglass, reducing the introducing amount of finings and nitrate salt, it is imperative that design and manufacturing have the environmental protection optical glass of perfect optics parameter.
Summary of the invention
In view of this, the technical problem that the present invention will solve is to provide a kind of finings of not introducing, and specific refractory power is 1.72～1.82, and Abbe number is 24～29, and transmittance reaches at 80% o'clock, and corresponding wavelength is less than the opticglass and the optical element of the environmental protection of 420nm.
The present invention provides a kind of opticglass, comprises following composition:
The SiO of 28wt%～43wt%
2
The TiO of 23wt%～33wt%
2
The BaO of 6wt%～20wt%;
The R of 6wt%～20wt%
2O;
Said R
2O comprises K
2O and/or Na
2O,
Said opticglass does not contain finings.
Preferably, also comprise:
The MgO of the SrO of 0～5wt%, the CaO of 0～5wt%, 0～5wt%, the Nb of 0～12wt%
2O
5WO with 0～5wt%
3In one or more.
Preferably, comprising:
The SrO of 1wt%～3.5wt%.
Preferably, comprising:
The Nb of 4wt%～12wt%
2O
5
Preferably, comprising:
The SiO of 29wt%～41.5wt%
2
Preferably, comprising:
The TiO of 25wt%～32wt%
2
Preferably, comprising:
The BaO of 10wt%～20wt%.
Preferably, comprising:
The R of 8wt%～20wt%
2O.
Preferably, specific refractory power is 1.72～1.82;
Abbe number is 24～29;
Transmittance reaches at 80% o'clock, and corresponding wavelength is less than 420nm.
The present invention also provides a kind of technique scheme optical element that described opticglass forms.
The present invention provides a kind of opticglass and optical element, and opticglass comprises the SiO of following composition: 28wt%～43wt%
2The TiO of 23wt%～33wt%
2The BaO of 6wt%～20wt%; The R of 6wt%～20wt%
2O; Said R
2O comprises K
2O and/or Na
2O, said opticglass does not contain finings.SiO
2Have the effect of keeping the anti-increased devitrification resistance of glass, and have the effect of the grid component that forms glass.TiO
2Can improve the specific refractory power and the chemicalstability of opticglass, and have the chemical resistant properties of raising glass and the effect of anti-increased devitrification resistance.BaO can increase specific refractory power, gloss and the chemicalstability of opticglass, and BaO can also effectively reduce glass viscosity simultaneously, makes that the activity of glass itself is bigger.Na
2O is the opticglass fusing assistant, can reduce the viscosity of glass, makes opticglass be easy to fusion.K
2O can reduce the viscosity of glass, makes glass be easy to fusion, and can reduce the crystallization tendency of glass, increases the transparency and the gloss of glass.Opticglass provided by the invention at high temperature viscosity is little, and the activity of opticglass is bigger, does not impel the gas of glass melting and clarifying process to discharge better so need not introduce finings, thereby has avoided the detrimentally affect to environment.Experimental result shows that opticglass provided by the invention does not add finings, need not add non-environmental protection element; Specific refractory power is 1.72～1.82, and Abbe number is 24～29, and transmittance reaches at 80% o'clock; Corresponding wavelength satisfies the needs of modern imaging device less than 420nm.
Embodiment
To carry out clear, intactly description to the technical scheme in the embodiment of the invention below, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The present invention provides a kind of opticglass, comprises following composition:
The SiO of 28wt%～43wt%
2
The TiO of 23wt%～33wt%
2
The BaO of 6wt%～20wt%;
The R of 6wt%～20wt%
2O;
Said R
2O comprises K
2O and/or Na
2O;
Said opticglass does not contain finings.
SiO
2Being important glass-former oxide compound, forming irregular contiguous network with the structural unit of silicon-oxy tetrahedron, is the skeleton that forms opticglass.SiO
2Has the effect of keeping the anti-increased devitrification resistance of glass.SiO
2Content when surpassing 43wt%, the meltability of opticglass reduces, softening temperature raises.SiO
2Content be defined as 28wt%～43wt%, be preferably 29wt%～41.5wt%.
TiO
2Can improve the specific refractory power and the chemicalstability of opticglass, and have the chemical resistant properties of raising glass and the effect of anti-increased devitrification resistance.TiO
2Content be defined as 23wt%～33wt%, be preferably 25wt%～32wt%.
BaO can increase specific refractory power, gloss and the chemicalstability of opticglass, and BaO can also effectively reduce glass viscosity simultaneously, makes that the activity of glass itself is bigger, so need not introduce Sb
2O
3Deng finings, impel the gas of glass melting and clarifying process to discharge better.Among the present invention, the content of BaO is defined as 6wt%～20wt% in the opticglass, is preferably 10wt%～20wt%.
R
2O comprises K
2O and/or Na
2O.Na
2O is the glass fusing assistant, can reduce the transition temperature of glass.K
2O can reduce the viscosity of glass, makes glass be easy to fusion, and can reduce the crystallization tendency of glass, increases the transparency and the gloss of glass.R
2The content of O is defined as 6wt%～20wt%, is preferably 8wt%～20wt%.
At high temperature viscosity is little by the formed opticglass of prescription scheme of the present invention, and the activity of glass itself is bigger, so need not introduce Sb
2O
3Impel the gas of glass melting and clarifying process to discharge better Deng finings, thereby avoided detrimentally affect environment.
According to the present invention, said opticglass can also comprise the SrO of 0～5wt%, the CaO of 0～5wt%, the MgO of 0～5wt%, the Nb of 0～12wt%
2O
5WO with 0～5wt%
3In one or more.
SrO has the effect of the specific refractory power that increases opticglass as the surrogate of BaO, and can improve the anti-increased devitrification resistance of glass.The content of SrO can be 0～5wt%, can also be 1wt%～3.5wt%.CaO act as stablizer in opticglass, can increase the chemicalstability and the physical strength of opticglass, reduces the density of opticglass.The content of CaO can be 0～5wt%, can also be 1wt%～5wt%.When the content of CaO during greater than 5wt%, the crystallization tendency of opticglass increases, and makes the opticglass embrittlement.MgO can make the setting rate of glass slack-off, improves the forming property of glass, can also improve the chemicalstability and the physical strength of glass.The content of MgO can be 0～5wt%, can also be 1wt%～5wt%.
Nb
2O
5Be the component of giving the glass high refractive index, and have the crystallization property of improvement glass and the effect of anti-increased devitrification resistance.Nb
2O
5Content can be 0～12wt%, can also be 4wt%～12wt%.Nb
2O
5When content is higher than 12wt%, can cause the glass chromatic dispersion to raise, the shortwave transmitance of glass is descended.
WO
3It is a kind of component that improves the anti-increased devitrification resistance of opticglass.WO
3Content can be 0～5wt%, can also be 1wt%～5wt%.Work as WO
3Content when surpassing 5wt%, opticglass strengthens the absorption of shortwave scope, opticglass will develop the color easily.
Opticglass provided by the invention is not introduced finings, can not need introduce nitrate salt, need not add non-environmental protection element, and specific refractory power is 1.72～1.82, and Abbe number is 24～29, and transmittance reaches at 80% o'clock, and corresponding wavelength is less than 420nm, more than the bubble-level A0.
The present invention also provides a kind of optical element that is formed by the described opticglass of technique scheme.Optical element of the present invention is formed by the opticglass of the invention described above, and therefore, this optical element has the various characteristics of above-mentioned opticglass.
The performance perameter of opticglass provided by the invention is tested according to following method.
Wherein specific refractory power (nd) value for (2 ℃/h)-(6 ℃/h) annealing value, specific refractory power and Abbe number are tested according to " GB/T 7962.1-1987 colouless optical glass testing method specific refractory power and abbe number ".
Transition temperature (Tg) is tested according to " GB/T7962.16-1987 colouless optical glass testing method linear expansivity, transition temperature and sag temperature "; That is: sample is in certain TR; 1 ℃ of the every rising of temperature; On the expansion curve of sample, low-temperature region and the extension of high-temperature area straight line portion are intersected the pairing temperature of its intersection point.
Glass is made the sample of 10mm ± 0.1mm thickness, and tested glass reaches 80% corresponding wavelength X in transmittance
80
The schlieren instrument that striped is formed with pointolite and lens on the direction of the striped seen the most easily, with the standard test specimen inspection of making comparisons, detects striped under prescribed condition.The above striped of A0 level does not have macroscopic striped.
The glass blister quality is measured by the GB/T7962.8-1987 specified test.
Viscosity is tested with rotational viscosimeter according to the testing method of ASTM C965 standard code.
Optical element of the present invention is formed by above-mentioned opticglass, does not contain finings, need not add non-environmental protection element, and specific refractory power is 1.72～1.82, and Abbe number is 24～29, and transmittance reaches at 80% o'clock, and corresponding wavelength is less than 420nm.Optical element provided by the invention is applicable to digital camera, DV and camera cell phone etc.
For the preparation method of opticglass provided by the invention, do not have special restriction, prepare according to method well known to those skilled in the art.Raw material is melted, lowers the temperature after the clarification, homogenizing, inject the metal pattern of preheating, annealing obtains opticglass.In the preparation process of opticglass, frit is not introduced nitrate salt, introduces with the mode of oxide compound or carbonate, thereby discharges at the fusion process nitrogenfree oxide.
In order to further specify technical scheme of the present invention; Embodiment below in conjunction with concrete describes the preferred embodiment of the invention, but is to be understood that; These are described just to further specifying feature and advantage of the present invention, rather than to the restriction of claim of the present invention.
The opticglass that the embodiment of the invention 1～6 is provided prepares according to following method:
With the pairing raw material of the composition weighing in proportion of opticglass among the embodiment 1～6, add in the platinum crucible behind the thorough mixing, after 1000～1380 ℃ of following fusings, clarification, homogenizing, lower the temperature;
Metal pattern after about 550～600 ℃ melten glass being poured into preheating;
Obtain opticglass, the correlation parameter of measuring optical glass after the melten glass that injects the metal pattern after the preheating put into lehre Xu Leng annealing together with metal pattern.The opticglass that embodiment 1～6 provides not crystallization, devitrification not when die mould.
The specific refractory power of the opticglass that embodiment 1～6 provides, Abbe number, transition temperature, light transmission, bubble, striped performance and viscosity are as shown in table 1.
Opticglass component percentages and corresponding performance that embodiment 1～6 provides are as shown in table 1.
The component percentages of the opticglass that table 1 embodiment 1～6 provides and corresponding performance
Can find out from the foregoing description; Opticglass that the embodiment of the invention provides and optical element do not contain finings, need not add non-environmental protection element, and specific refractory power is 1.72～1.82; Abbe number is 24～29; Transmittance reaches at 80% o'clock, and corresponding wavelength satisfies the needs of modern imaging device less than 420nm.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (6)
1. an opticglass is characterized in that, comprises following composition:
The SiO of 36.7wt%～41.7wt%
2
The TiO of 23.5wt%～25.1wt%
2
The BaO of 6wt%～20wt%;
The R of 6wt%～20wt%
2O;
Said R
2O comprises K
2O and/or Na
2O;
The Nb of 4wt%～7.4wt%
2O
5
Said opticglass does not contain finings.
2. opticglass according to claim 1 is characterized in that, also comprises:
The MgO of the SrO of 0～5wt%, the CaO of 0～5wt%, 0～5wt% and the WO of 0～5wt%
3In one or more.
3. opticglass according to claim 2 is characterized in that, comprising:
The SrO of 1wt%～3.5wt%.
4. opticglass according to claim 1 is characterized in that, comprising:
The BaO of 10wt%～20wt%.
5. according to any described opticglass of claim 1～4, it is characterized in that,
Specific refractory power is 1.72～1.82;
Abbe number is 24～29;
Transmittance reaches at 80% o'clock, and corresponding wavelength is less than 420nm.
6. any optical element that described opticglass forms of a claim 1～5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010209112 CN101857357B (en) | 2010-06-25 | 2010-06-25 | Optical glass and optical element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010209112 CN101857357B (en) | 2010-06-25 | 2010-06-25 | Optical glass and optical element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101857357A CN101857357A (en) | 2010-10-13 |
| CN101857357B true CN101857357B (en) | 2012-12-26 |
Family
ID=42943555
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|---|---|---|---|
| CN 201010209112 Active CN101857357B (en) | 2010-06-25 | 2010-06-25 | Optical glass and optical element |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104341103A (en) * | 2013-07-23 | 2015-02-11 | 成都光明光电股份有限公司 | Environment-friendly flint optical glass and optical element |
| CN104944768A (en) * | 2015-06-12 | 2015-09-30 | 成都光明光电股份有限公司 | Environment-friendly optical glass, fabricated glass part, optical element and optical instrument |
| JP7157522B2 (en) * | 2017-03-29 | 2022-10-20 | Hoya株式会社 | Optical glasses and optical elements |
| CN110372202B (en) * | 2019-07-22 | 2022-02-11 | 成都光明光电股份有限公司 | Optical glass, glass preform, optical element and optical instrument |
| CN110255893B (en) * | 2019-07-22 | 2021-10-26 | 成都光明光电股份有限公司 | Optical glass, glass preform, optical element and optical instrument |
| CN110316961B (en) * | 2019-07-22 | 2021-08-17 | 成都光明光电股份有限公司 | Optical glass, glass preform, optical element and optical instrument |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1772670A (en) * | 2005-09-23 | 2006-05-17 | 成都光明光电股份有限公司 | High refractivity high dispersion no-lead optical glass |
| CN1915875A (en) * | 2006-08-31 | 2007-02-21 | 成都光明光电股份有限公司 | Environmental protective heavy flint optical glass in high refractive index, and high dispersion, and producing method and equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10133763C1 (en) * | 2001-07-11 | 2002-08-14 | Schott Glas | Lead-free optical heavy flint glasses |
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2010
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1772670A (en) * | 2005-09-23 | 2006-05-17 | 成都光明光电股份有限公司 | High refractivity high dispersion no-lead optical glass |
| CN1915875A (en) * | 2006-08-31 | 2007-02-21 | 成都光明光电股份有限公司 | Environmental protective heavy flint optical glass in high refractive index, and high dispersion, and producing method and equipment |
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|---|---|
| CN101857357A (en) | 2010-10-13 |
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