CN104108872B - Environmental protection optical glass, gas preform, optical element and optical instrument - Google Patents
Environmental protection optical glass, gas preform, optical element and optical instrument Download PDFInfo
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- CN104108872B CN104108872B CN201310135150.9A CN201310135150A CN104108872B CN 104108872 B CN104108872 B CN 104108872B CN 201310135150 A CN201310135150 A CN 201310135150A CN 104108872 B CN104108872 B CN 104108872B
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Abstract
The present invention provide a kind of refractive index be 1.55~1.63, the environmental protection optical glass that Abbe number is 42~52, do not contain expensive Nb in the glass2O5And PbO, As of pollution environment2O3And fluoride.Environmental protection optical glass, by weight percentage composition contain: SiO2: 48~65%, TiO2: 5~15%, ZnO:2~8%, BaO:10~22%, CaO:0~5%, Al2O3: 0~5%, Li2O:0~3%, Sb2O3: 0~0.3%, Na2O:1~8%, K2O:5~16%.The density of optical glass of the invention is 3.0g/cm3Hereinafter, transition temperature is 565 DEG C hereinafter, crystallization temperature is 1000 DEG C hereinafter, transmittance reaches corresponding wavelength X when 80%80Less than 380nm, transmittance reaches corresponding wavelength X when 5%5Less than 350nm.
Description
Technical field
The present invention relates to a kind of optical glass, more particularly to a kind of refractive index (nd) it is 1.55~1.63, Abbe number (vd)
For 42~52 environmental protection optical glass, and the prefabricated component, optical element and the optical instrument that are made of the optical glass.
Background technique
Contain a large amount of PbO and As clarifying agent in traditional barium flint optical glass component2O3, but with ring
The cry of border protection grows to even greater heights, PbO and As2O3It will be substituted by other components.It develops and is not only able to satisfy requirement, but also
Without containing environmentally harmful substance, while requiring low in raw material price, can at low cost quantity-produced optical glass at
The objective of the struggle of scientific research personnel.
CN98105841.8 discloses a kind of optical glass, contains a large amount of expensive Nb in component2O5, this will certainly increase
The production cost for adding glass, is unfavorable for industrialized mass production；In addition, also containing a large amount of B in the component2O3, this meeting is so that glass
Glass volatility when melting increases, while the devitrification characteristic of glass is deteriorated.JP8048538A discloses a kind of optical glass,
Contain 6~35% Nb2O5, while also containing 0.1~10% fluoride, this not only adds costs of material, while in reality
In production process, fluoride gas and dust can be discharged, increases carrying capacity of environment and processing cost.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of refractive index be 1.55~1.63, Abbe number is 42~52
Environmental protection optical glass does not contain expensive Nb in the glass2O5And PbO, As of pollution environment2O3And fluoride.
The technical proposal for solving the technical problem of the invention is: environmental protection optical glass, and composition contains by weight percentage
Have: SiO2: 48~65%, TiO2: 5~15%, ZnO:2~8%, BaO:10~22%, CaO:0~5%, Al2O3: 0~5%,
Li2O:0~3%, Sb2O3: 0~0.3%, Na2O:1~8%, K2O:5~16%.
Further, it forms by weight percentage are as follows: SiO2: 48~65%, TiO2: 5~15%, ZnO:2~8%, BaO:
10~22%, CaO:0~5%, Al2O3: 0~5%, Li2O:0~3%, Sb2O3: 0~0.3%, Na2O:1~8%, K2O:5~
16%.
Further, in which: NaO2With K2The total amount of O is 10~18%.
Further, in which: SiO2: 50~60%.
Further, in which: TiO2: 7~12%.
Further, in which: Na2O:2~6%.
Further, in which: K2O:8~12%.
Further, in which: BaO:11~19.5%.
Further, in which: CaO:0~3%.
Further, in which: Al2O3: 0~3%.
Further, in which: Li2O:0~2%.
Further, in which: Sb2O3: 0~0.2%.
Further, the environmental protection optical glass density is 3.0g/cm3Hereinafter, refractive index is 1.55~1.63, Abbe number
It is 42~52, transition temperature is 565 DEG C hereinafter, crystallization temperature is 1000 DEG C hereinafter, transmittance reaches corresponding wavelength when 80%
λ80Less than 380nm, transmittance reaches corresponding wavelength X when 5%5Less than 350nm.
Using gas preform made of above-mentioned environmental protection optical glass.
Using optical element made of above-mentioned environmental protection optical glass.
Using optical instrument made of above-mentioned environmental protection optical glass.
The beneficial effects of the present invention are: being added without expensive Nb2O5, production cost is reduced, resource has been saved；No
B is added2O3, the light transmission rate of glass is excellent；Without containing PbO, As2O3With the pollution components such as fluoride, environmentally friendly optics glass has been obtained
Glass, the density of optical glass of the invention are 3.0g/cm3Hereinafter, refractive index (nd) it is 1.55~1.63, Abbe number (vd) it is 42
~52, transition temperature (Tg) is 565 DEG C hereinafter, crystallization temperature is 1000 DEG C hereinafter, transmittance reaches corresponding wavelength when 80%
λ80Less than 380nm, transmittance reaches corresponding wavelength X when 5%5Less than 350nm.
Specific embodiment
Each component of optical glass of the present invention is described below, unless otherwise indicated, the content weight of each component
Measuring % indicates.
SiO2It is important glass former oxide, skeleton function is played in glass structure, is that optical glass realizes light
Learn constant basis, content number it is closely related with the chemical stability of glass, melt characteristic.In the present invention, when
SiO2When content is less than 48%, the chemical stability of glass can be reduced；But it when its content is more than 65%, then is difficult to maintain glass
Optical constant, while can also significantly improve the melt temperature of glass.The especially excellent glass of chemical stability in order to obtain, together
When take into account its melt characteristic, SiO of the invention2Content is 48~65%, preferably 50~60%.
TiO2In the present invention for improving the refractive index and dispersion of glass, to reach required optical constant.Meanwhile
TiO2It can be to improve the mechanical performance and chemical stability of glass significantly.But if TiO2Content be lower than 5%, then
Glass cannot reach desired optical constant, if content is higher than 15%, can make glass coloration, cause the significant evil of light transmission rate
Change.Therefore, TiO2Content is 5~15%, preferably 7~12%.
Li2O component can be greatly lowered the transition temperature of glass and be effectively improved the meltdown property of glass, in the present invention
In, when its content is greater than 3%, the devitrification resistance and chemical stability of glass sharply deteriorate, therefore the content of the component limits
It is 0~3%, preferably 0~2%.
Na2The transition temperature of glass can be effectively reduced in O, improves the meltdown property and adjustment optical constant of glass, if
The content of the component then cannot sufficiently obtain these effects less than 1%, and if the content of this component is more than 8%, glass
Chemical stability is significantly deteriorated.Therefore, the content of the component is limited to 1~8%, preferably 2~6%.
K2O is one of the component that the present invention must add, for adjusting optical constant and reducing the solution temperature of glass.
When its content is lower than 5%, it is unable to reach said effect；If content is more than 16%, the evil of chemical durability of glass can be caused
Change.Therefore, K2O content is 5~16%, preferably 8~12%.
In addition, through research, the inventor has found that, work as NaO2With K2It, can more significantly when the total amount of O reaches 10% or more
Reduce the solution temperature and high temperature viscosity of glass.But work as NaO2With K2When the total amount of O is more than 18%, then the chemical stabilization of glass
Property can also deteriorate therewith.Therefore, NaO2With K2The total amount of O is 10~18%.
ZnO advantageously reduces the fusion temperature and softening temperature of glass, and plays the role of adjusting glass optics properties.When it
When content is less than 2%, the softening temperature of glass rises；And when its content is higher than 8%, the dispersion of glass increases, tendency towards devitrification
Increase, while the high temperature viscosity of glass becomes smaller, bring very big difficulty to the molding of glass, thus the content of ZnO be limited to 2~
8%.
BaO is the component that must contain in the present invention, and the refractive index and devitrification resistance property of glass can be improved.In the present invention
In, when the content of BaO is lower than 10%, required optical constant cannot be reached, if content is more than 22%, be easy continuous
Data are unstable in melting, can also aggravate corrosion production furnace body.Therefore, BaO content be limited to 10~22%, preferably 11~
19.5%.
The chemical stability of glass can be improved in CaO, and has fluxing action, but its content be higher than 5% when, the crystallization of glass
Tendency increases.Therefore the content of CaO is limited to 0~5%, preferably 0~3%, is more preferably added without.
Al2O3It is that if content is excessive, then cannot obtain institute's phase for improving chemical durability and addible ingredient
The glass transition temperature of prestige.Therefore Al2O3Content be 0~5%, preferably 0~3%.
Sb2O3It is used in the present invention as clarifying agent, content is 0~0.3%, preferably 0~0.2%.
The performance of optical glass of the invention is described below.
Refractive index and Abbe number are according to " GB/T7962.1-1987 colouless optical glass test method refractive index and dispersion system
Number " test.
Transition temperature (Tg) is according to " GB/T7962.16-1987 colouless optical glass test method linear expansion coefficient, transformation
Temperature and slackened temperature " test, it may be assumed that sample is within the scope of certain temperature, and temperature is every to increase 1 DEG C, in sample
On expansion curve, low-temperature region and high-temperature area straight line portion are extended into intersection, temperature corresponding to intersection point.
Density is tested according to " GB/T7962.20-1987 colouless optical glass test method density measurement method ".
Optical glass shortwave transmitted spectrum characteristic degree of staining (λ80/λ5) indicate.That is: thickness of sample is 10mm ± 0.1mm,
λ80Refer to that glass transmittance reaches corresponding wavelength, λ when 80%5Refer to that glass transmittance reaches corresponding wavelength when 5%.
Using the crystallization property of temperature gradient furnace method measurement glass, glass is made to the sample of 180*10*10mm, side polishes,
It is taken out after being put into furnace inside holding 4 hours with temperature gradient, observes devitrification of glass situation under the microscope, crystal occurs in glass
Corresponding maximum temperature is the crystallization ceiling temperature of glass.The crystallization ceiling temperature of glass is lower, then glass is steady at high temperature
Qualitative stronger, the processing performance of production is better.
By test, optical glass of the invention is had the following performance: density 3.0g/cm3Hereinafter, refractive index (nd) be
1.55~1.63, Abbe number (vd) it is 42~52, transition temperature (Tg) is 565 DEG C hereinafter, crystallization temperature is 1000 DEG C hereinafter, thoroughly
Corresponding wavelength X when penetrating than reaching 80%80Less than 380nm, transmittance reaches corresponding wavelength X when 5%5Less than 350nm.
The present invention also provides a kind of optical elements, by above-mentioned optical glass according to method shape well known to those skilled in the art
At, and the optical element can be applied to the equipment such as digital camera, digital camera, camera cell phone.
Embodiment
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 Examples 1 to 30 shown in 1~table of table 3 is by the ratio weighing according to each embodiment shown in 1~table of table 3
And hybrid optical glass is with common raw material (such as oxide, hydroxide, carbonate, nitrate and fluoride), by mixed raw material
It is placed in platinum crucible, is melted in certain temperature, and after fusing, clarification, stirring and homogenizing, obtain no bubble
And the homogeneous melt glass without undissolved substance, this melten glass casting mold and is annealed in mold.
The composition and refractive index (nd), Abbe number (vd), density (ρ), glass transformation temperature of the embodiment of the present invention 1~30
(Tg), degree of staining (λ80/λ5) result indicated in 1~table of table 3 together.In these tables, the composition of each component is with weight
Measure what % was indicated.
Table 1
Table 2
Table 3
By the embodiment in above-mentioned 1~table of table 3 can be seen that glass of the invention be added without it is expensive
Nb2O5, production cost is reduced, has saved resource, and do not contain PbO, As2O3With the pollution components such as fluoride.The present invention is logical
It crosses and reasonably adjusts SiO2、TiO2Etc. components content so that the light transmission rate of glass is excellent, glass density 3.0g/cm3Hereinafter,
Refractive index (nd) it is 1.55~1.63, Abbe number (vd) it is 42~52, transition temperature (Tg) is 565 DEG C hereinafter, crystallization temperature is
1000 DEG C hereinafter, transmittance reaches corresponding wavelength X when 80%80Less than 380nm, transmittance reaches corresponding wavelength X when 5%5
Less than 350nm.
Claims (16)
1. environmental protection optical glass, which is characterized in that composition contains by weight percentage: SiO2: 48~65%, TiO2: 5~15%,
ZnO:2~8%, BaO:12.3~22%, CaO:0~5%, Al2O3: 0~5%, Li2O:0~3%, Sb2O3: 0~0.3%,
Na2O:1~8%, K2O:5~16% is free of B2O3、Nb2O5、PbO、As2O3And fluoride, transmittance reach corresponding when 80%
Wavelength X80Less than 380nm, transmittance reaches corresponding wavelength X when 5%5Less than 350nm.
2. environmental protection optical glass as described in claim 1, which is characterized in that form by weight percentage are as follows: SiO2: 48~
65%, TiO2: 5~15%, ZnO:2~8%, BaO:12.3~22%, CaO:0~5%, Al2O3: 0~5%, Li2O:0~
3%, Sb2O3: 0~0.3%, Na2O:1~8%, K2O:5~16%.
3. the environmental protection optical glass as described in any claim in claim 1~2, which is characterized in that wherein: NaO2With K2O
Total amount be 10~18%.
4. the environmental protection optical glass as described in any claim in claim 1~2, which is characterized in that wherein: SiO2: 50~
60%.
5. the environmental protection optical glass as described in any claim in claim 1~2, which is characterized in that wherein: TiO2: 7~
12%.
6. the environmental protection optical glass as described in any claim in claim 1~2, which is characterized in that wherein: Na2O:2~
6%.
7. the environmental protection optical glass as described in any claim in claim 1~2, which is characterized in that wherein: K2O:8~
12%.
8. the environmental protection optical glass as described in any claim in claim 1~2, which is characterized in that wherein: BaO:12.3
~19.5%.
9. the environmental protection optical glass as described in any claim in claim 1~2, which is characterized in that wherein: CaO:0~
3%.
10. the environmental protection optical glass as described in any claim in claim 1~2, which is characterized in that wherein: Al2O3: 0
~3%.
11. the environmental protection optical glass as described in any claim in claim 1~2, which is characterized in that wherein: Li2O:0~
2%.
12. the environmental protection optical glass as described in any claim in claim 1~2, which is characterized in that wherein: Sb2O3: 0
~0.2%.
13. the environmental protection optical glass as described in any claim in claim 1~2, which is characterized in that the environmental protection optics
Glass density is 3.0g/cm3Hereinafter, refractive index be 1.55~1.63, Abbe number be 42~52, transition temperature be 565 DEG C hereinafter,
Crystallization temperature is 1000 DEG C or less.
14. using gas preform made of environmental protection optical glass described in any claim in claim 1~13.
15. using optical element made of environmental protection optical glass described in any claim in claim 1~13.
16. using optical instrument made of environmental protection optical glass described in any claim in claim 1~13.
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| 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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| CN104108872A CN104108872A (en) | 2014-10-22 |
| CN104108872B true CN104108872B (en) | 2019-09-17 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106032308B (en) * | 2015-03-13 | 2019-06-04 | 成都光明光电股份有限公司 | Environmental protection optical glass and optical element |
| CN105819683B (en) * | 2016-03-04 | 2019-12-03 | 成都光明光电股份有限公司 | Environmental protection 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 |
| CN109867442B (en) * | 2019-04-24 | 2021-11-26 | 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086196A (en) * | 1992-10-20 | 1994-05-04 | 东洋玻璃株式会社 | Glass composition |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19725552A1 (en) * | 1997-06-12 | 1998-12-24 | Ivoclar Ag | Alkali silicate glass |
| JPH11199270A (en) * | 1998-01-14 | 1999-07-27 | Nippon Electric Glass Co Ltd | Optical glass for mold press forming |
| JPH11302035A (en) * | 1998-04-17 | 1999-11-02 | Nippon Electric Glass Co Ltd | Optical glass for mold press molding |
| JP4126635B2 (en) * | 1999-02-08 | 2008-07-30 | 日本電気硝子株式会社 | Optical glass for mold press molding |
| JP2010083723A (en) * | 2008-09-30 | 2010-04-15 | Ohara Inc | Optical glass, sample holding tool and optical element |
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2013
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086196A (en) * | 1992-10-20 | 1994-05-04 | 东洋玻璃株式会社 | Glass composition |
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