CN104108872A - Environment-protective optical glass, glass preformed part, optical element and optical instrument - Google Patents
Environment-protective optical glass, glass preformed part, optical element and optical instrument Download PDFInfo
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- CN104108872A CN104108872A CN201310135150.9A CN201310135150A CN104108872A CN 104108872 A CN104108872 A CN 104108872A CN 201310135150 A CN201310135150 A CN 201310135150A CN 104108872 A CN104108872 A CN 104108872A
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- optical glass
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- protection optical
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Abstract
The invention provides environment-protective optical glass with a refractive index being 1.55-1.63 and Abbe number being 42-52. The optical glass is free of Nb2O5 which is expensive and PbO, As2O3 and fluorides which are harmful to environment. The environment-protective optical glass comprises, by weight, 48-65% of SiO2, 5-15% of TiO2, 2-8% of ZnO, 10-22% of BaO, 0-5% of CaO, 0-5% of Al2O3, 0-3% of Li2O, 0-0.3% of Sb2O3, 1-8% of Na2O and 5-16% of K2O. Density of the optical glass is less than 3.0g/cm<3>; a converting temperature of the optical glass is lower than 565 DEG C; and a crystallizing temperature of the opeical glass is lower than 1000 DEG C. When transmittance of the optical glass reaches 80%, a corresponding wavelength [lambda]80 is less than 380 nm. When the transmittance of the optical glass reaches 5%, a corresponding wavelength [lambda]5 is less than 350 nm.
Description
Technical field
The present invention relates to a kind of opticglass, particularly relate to a kind of specific refractory power (n
d) be 1.55～1.63, Abbe number (v
d) be 42～52 environmental protection optical glass, and the prefabricated component, optical element and the opticinstrument that are formed by this opticglass.
Background technology
In traditional barium flint optical glass component, contain a large amount of PbO and the As finings
2o
3, but along with the cry of environment protection grows to even greater heights, PbO and As
2o
3will be substituted by other components.Develop and can meet service requirements, do not contain again environmentally harmful material, require cost of material cheap simultaneously, quantity-produced opticglass has become scientific research personnel's the objective of the struggle at low cost.
CN98105841.8 discloses a kind of opticglass, contains the Nb of a large amount of costlinesses in its component
2o
5, the production cost that this will certainly increase glass, is unfavorable for industrialized mass production; In addition, in this component, also contain a large amount of B
2o
3, this can make glass volatility in the time melting increase, the devitrification characteristic variation of glass simultaneously.JP8048538A discloses a kind of opticglass, and it contains 6～35% Nb
2o
5, also containing 0.1～10% fluorochemical simultaneously, this has not only increased raw materials cost, in actual production process, can discharge fluoride gas and dust simultaneously, increases carrying capacity of environment and processing cost.
Summary of the invention
Technical problem to be solved by this invention is to provide the environmental protection optical glass that a kind of specific refractory power is 1.55～1.63, Abbe number is 42～52, does not contain expensive Nb in this glass
2o
5, and PbO, the As of contaminate environment
2o
3and fluorochemical.
The technical scheme that technical solution problem of the present invention adopts is: environmental protection optical glass, composition contains by weight percentage: SiO
2: 48～65%, TiO
2: 5～15%, ZnO:2～8%, BaO:10～22%, CaO:0～5%, Al
2o
3: 0～5%, Li
2o:0～3%, Sb
2o
3: 0～0.3%, Na
2o:1～8%, K
2o:5～16%.
Further, consist of by weight percentage: SiO
2: 48～65%, TiO
2: 5～15%, ZnO:2～8%, BaO:10～22%, CaO:0～5%, Al
2o
3: 0～5%, Li
2o:0～3%, Sb
2o
3: 0～0.3%, Na
2o:1～8%, K
2o:5～16%.
Further, wherein: NaO
2with K
2the total amount of O is 10～18%.
Further, wherein: SiO
2: 50～60%.
Further, wherein: TiO
2: 7～12%.
Further, wherein: Na
2o:2～6%.
Further, wherein: K
2o:8～12%.
Further, wherein: BaO:11～19.5%.
Further, wherein: CaO:0～3%.
Further, wherein: Al
2o
3: 0～3%.
Further, wherein: Li
2o:0～2%.
Further, wherein: Sb
2o
3: 0～0.2%.
Further, described environmental protection optical glass density is 3.0g/cm
3below, specific refractory power is 1.55～1.63, and Abbe number is 42～52, and transition temperature is below 565 DEG C, and recrystallization temperature is below 1000 DEG C, corresponding wavelength X when transmittance reaches 80%
80be less than 380nm, corresponding wavelength X when transmittance reaches 5%
5be less than 350nm.
The gas preform that adopts above-mentioned environmental protection optical glass to make.
The optical element that adopts above-mentioned environmental protection optical glass to make.
The opticinstrument that adopts above-mentioned environmental protection optical glass to make.
The invention has the beneficial effects as follows: do not add expensive Nb
2o
5, reduce production cost, save resource; Do not add B
2o
3, the light transmission rate excellence of glass; Do not contain PbO, As
2o
3with pollution components such as fluorochemicals, obtain environmental protection optical glass, the density of opticglass of the present invention is 3.0g/cm
3below, specific refractory power (n
d) be 1.55～1.63, Abbe number (v
d) be 42～52, transition temperature (Tg) is below 565 DEG C, recrystallization temperature is below 1000 DEG C, corresponding wavelength X when transmittance reaches 80%
80be less than 380nm, corresponding wavelength X when transmittance reaches 5%
5be less than 350nm.
Embodiment
To describe each component of opticglass of the present invention below, except as otherwise noted, the content of each component represents by % by weight.
SiO
2being important glass-former oxide compound, playing skeleton function in glass structure, is the basis that opticglass is realized optical constant, and the number of its content and chemical stability, the melt characteristic of glass are closely related.In the present invention, work as SiO
2during containing quantity not sufficient 48%, the chemical stability of glass can reduce; But in the time that its content exceedes 65%, be difficult to maintain the optical constant of glass, also can significantly improve the melt temperature of glass simultaneously.In order to obtain the glass that chemical stability is excellent especially, take into account its melt characteristic, SiO of the present invention simultaneously
2content is 48～65%, is preferably 50～60%.
TiO
2in the present invention for improving specific refractory power and the dispersion of glass, to reach needed optical constant.Meanwhile, TiO
2can also improve significantly mechanical property and the chemical stability of glass.But, if TiO
2content lower than 5%, glass can not reach desired optical constant so, if content, higher than 15%, can make glass coloring, causes the remarkable deterioration of light transmission rate.Therefore, TiO
2content is 5～15%, is preferably 7～12%.
Li
2o component can significantly reduce the transition temperature of glass and effectively improve the melting properties of glass, in the present invention, in the time that its content is greater than 3%, devitrification resistance and the chemical stability of glass sharply worsen, therefore the content of this component is defined as 0～3%, is preferably 0～2%.
Na
2o can effectively reduce the transition temperature of glass, improve the melting properties of glass and adjust optical constant, if the content of this component is less than 1%, can not fully obtain these effects, if and the content of this component exceedes 8%, the remarkable variation of the chemical stability of glass.Therefore, the content of this component is defined as 1～8%, is preferably 2～6%.
K
2o is one of the component that must add of the present invention, for regulating optical constant and reducing the solvent temperature of glass.When its content is lower than 5% time, cannot reach above-mentioned effect; If content exceedes 16%, can cause the deterioration of chemical durability of glass.Therefore, K
2o content is 5～16%, is preferably 8～12%.
In addition, the inventor finds by research, works as NaO
2with K
2the total amount of O reaches 10% when above, can reduce more significantly solvent temperature and the high temperature viscosity of glass.But work as NaO
2with K
2when the total amount of O exceedes 18%, the chemical stability of glass also can worsen thereupon.Therefore, NaO
2with K
2the total amount of O is 10～18%.
ZnO is conducive to reduce temperature of fusion and the softening temperature of glass, and has the effect of adjusting glass optics properties.In the time that it contains quantity not sufficient 2%, the softening temperature of glass rises; And when its content is higher than 8% time, the dispersion of glass increases, tendency towards devitrification increases, and the high temperature viscosity of glass diminishes simultaneously, brings very large difficulty to the moulding of glass, and therefore the content of ZnO is defined as 2～8%.
BaO is the component that must contain in the present invention, can improve specific refractory power and the devitrification resistance property of glass.In the present invention, when the content of BaO is lower than 10% time, can not reach required optical constant, if when content exceedes 22%, easily in continuous smelting, data are unstable, also can add heavy corrosion and produce body of heater.Therefore, BaO content is defined as 10～22%, is preferably 11～19.5%.
CaO can improve the chemical stability of glass, and has fluxing action, but its content is higher than 5% time, and the tendency towards devitrification of glass increases.Therefore the content of CaO is defined as 0～5%, is preferably 0～3%, does not more preferably add.
Al
2o
3be addible composition for improving chemical durability, its content is too much, can not obtain desired second-order transition temperature.Therefore Al
2o
3content be 0～5%, be preferably 0～3%.
Sb
2o
3use as finings in the present invention, its content is 0～0.3%, is preferably 0～0.2%.
To the performance of opticglass of the present invention be described below.
Specific refractory power and Abbe number are tested according to " GB/T7962.1-1987 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 temperature range, 1 DEG C 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 to the corresponding temperature of its intersection point.
Density is tested according to " GB/T7962.20-1987 colouless optical glass testing method density measurement method ".
Opticglass shortwave transmitted spectrum degree of staining (λ for characteristic
80/ λ
5) represent.That is: thickness of sample is 10mm ± 0.1mm, λ
80refer to wavelength corresponding when glass transmittance reaches 80%, λ
5refer to wavelength corresponding when glass transmittance reaches 5%.
Adopt temperature gradient furnace method to measure the crystallization property of glass, glass is made to the sample of 180*10*10mm, side polishing, put into be incubated 4 hours with the stove of thermograde after take out, examine under a microscope devitrification of glass situation, glass occurs that top temperature that crystal is corresponding is the crystallization ceiling temperature of glass.The crystallization ceiling temperature of glass is lower, and glass stability in the time of high temperature is stronger, and the processing performance of production is better.
Through test, opticglass of the present invention has following performance: density is 3.0g/cm
3below, specific refractory power (n
d) be 1.55～1.63, Abbe number (v
d) be 42～52, transition temperature (Tg) is below 565 DEG C, recrystallization temperature is below 1000 DEG C, corresponding wavelength X when transmittance reaches 80%
80be less than 380nm, corresponding wavelength X when transmittance reaches 5%
5be less than 350nm.
The present invention also provides a kind of optical element, formed, and described optical element can be applied to the equipment such as digital camera, digital camera, camera cell phone by above-mentioned opticglass according to method well known to those skilled in the art.
Embodiment
In order further to understand technical scheme of the present invention, by describing the embodiment of opticglass of the present invention, should be noted that below, these embodiment do not limit the scope of the invention.
The embodiment 1～30th showing in table 1～table 3, by weighing according to the ratio of each embodiment shown in table 1～table 3 and hybrid optical common raw material (as oxide compound, oxyhydroxide, carbonate, nitrate and fluorochemical) for glass, mixing raw material is placed in platinum crucible, melting in certain temperature, and after fusing, clarification, stirring and homogenizing, obtain not having bubble and do not contain the not homogeneous melten glass of dissolved substance, this melten glass casting mold in mould is also annealed and formed.
The composition of the embodiment of the present invention 1～30 and specific refractory power (nd), Abbe number (vd), density (ρ), glass transformation temperature (Tg), degree of staining (λ
80/ λ
5) result together in table 1～table 3 represent.In these tables, the composition of each component represents by % by weight.
Table 1
Table 2
Table 3
Can find out by the embodiment in above-mentioned table 1～table 3, glass of the present invention does not add expensive Nb
2o
5, reduced production cost, saved resource, and do not contain PbO, As
2o
3with pollution components such as fluorochemicals.The present invention is by rationally adjusting SiO
2, TiO
2etc. the content of component, make the light transmission rate excellence of glass, glass density is 3.0g/cm
3below, specific refractory power (n
d) be 1.55～1.63, Abbe number (v
d) be 42～52, transition temperature (Tg) is below 565 DEG C, recrystallization temperature is below 1000 DEG C, corresponding wavelength X when transmittance reaches 80%
80be less than 380nm, corresponding wavelength X when transmittance reaches 5%
5be less than 350nm.
Claims (16)
1. environmental protection optical glass, is characterized in that, composition contains by weight percentage: SiO
2: 48～65%, TiO
2: 5～15%, ZnO:2～8%, BaO:10～22%, CaO:0～5%, Al
2o
3: 0～5%, Li
2o:0～3%, Sb
2o
3: 0～0.3%, Na
2o:1～8%, K
2o:5～16%.
2. environmental protection optical glass as claimed in claim 1, is characterized in that, consists of by weight percentage: SiO
2: 48～65%, TiO
2: 5～15%, ZnO:2～8%, BaO:10～22%, CaO:0～5%, Al
2o
3: 0～5%, Li
2o:0～3%, Sb
2o
3: 0～0.3%, Na
2o:1～8%, K
2o:5～16%.
3. the environmental protection optical glass as described in arbitrary claim in claim 1～2, is characterized in that, wherein: NaO
2with K
2the total amount of O is 10～18%.
4. the environmental protection optical glass as described in arbitrary claim in claim 1～2, is characterized in that, wherein: SiO
2: 50～60%.
5. the environmental protection optical glass as described in arbitrary claim in claim 1～2, is characterized in that, wherein: TiO
2: 7～12%.
6. the environmental protection optical glass as described in arbitrary claim in claim 1～2, is characterized in that, wherein: Na
2o:2～6%.
7. the environmental protection optical glass as described in arbitrary claim in claim 1～2, is characterized in that, wherein: K
2o:8～12%.
8. the environmental protection optical glass as described in arbitrary claim in claim 1～2, is characterized in that, wherein: BaO:11～19.5%.
9. the environmental protection optical glass as described in arbitrary claim in claim 1～2, is characterized in that, wherein: CaO:0～3%.
10. the environmental protection optical glass as described in arbitrary claim in claim 1～2, is characterized in that, wherein: Al
2o
3: 0～3%.
11. environmental protection optical glass as described in arbitrary claim in claim 1～2, is characterized in that, wherein: Li
2o:0～2%.
12. environmental protection optical glass as described in arbitrary claim in claim 1～2, is characterized in that, wherein: Sb
2o
3: 0～0.2%.
13. environmental protection optical glass as described in arbitrary claim in claim 1～2, is characterized in that, described environmental protection optical glass density is 3.0g/cm
3below, specific refractory power is 1.55～1.63, and Abbe number is 42～52, and transition temperature is below 565 DEG C, and recrystallization temperature is below 1000 DEG C, corresponding wavelength X when transmittance reaches 80%
80be less than 380nm, corresponding wavelength X when transmittance reaches 5%
5be less than 350nm.
14. adopt the gas preform that in claim 1～13, the environmental protection optical glass described in arbitrary claim is made.
15. adopt the optical element that in claim 1～13, the environmental protection optical glass described in arbitrary claim is made.
16. adopt the opticinstrument that in claim 1～13, the environmental protection optical glass described in arbitrary claim is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310135150.9A CN104108872B (en) | 2013-04-18 | 2013-04-18 | Environmental protection optical glass, gas preform, optical element and optical instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310135150.9A CN104108872B (en) | 2013-04-18 | 2013-04-18 | Environmental protection optical glass, gas preform, optical element and optical instrument |
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| Publication Number | Publication Date |
|---|---|
| CN104108872A true CN104108872A (en) | 2014-10-22 |
| CN104108872B CN104108872B (en) | 2019-09-17 |
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ID=51705886
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310135150.9A Active CN104108872B (en) | 2013-04-18 | 2013-04-18 | Environmental protection optical glass, gas preform, optical element and optical instrument |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105819683A (en) * | 2016-03-04 | 2016-08-03 | 成都光明光电股份有限公司 | Environmentally friendly optical glass and optical element |
| CN106032308A (en) * | 2015-03-13 | 2016-10-19 | 成都光明光电股份有限公司 | Environmental-friendly optical glass and optical element |
| CN106986536A (en) * | 2017-04-25 | 2017-07-28 | 南通向阳光学元件有限公司 | A kind of red optics glass composition |
| CN109867442A (en) * | 2019-04-24 | 2019-06-11 | 成都光明光电股份有限公司 | Optical glass |
| CN110550860A (en) * | 2019-09-30 | 2019-12-10 | 成都光明光电股份有限公司 | Optical glass |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106032308A (en) * | 2015-03-13 | 2016-10-19 | 成都光明光电股份有限公司 | Environmental-friendly optical glass and optical element |
| CN105819683A (en) * | 2016-03-04 | 2016-08-03 | 成都光明光电股份有限公司 | Environmentally friendly optical glass and optical element |
| CN106986536A (en) * | 2017-04-25 | 2017-07-28 | 南通向阳光学元件有限公司 | A kind of red optics glass composition |
| CN109867442A (en) * | 2019-04-24 | 2019-06-11 | 成都光明光电股份有限公司 | Optical glass |
| CN110550860A (en) * | 2019-09-30 | 2019-12-10 | 成都光明光电股份有限公司 | Optical glass |
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