CN104496174A - Optical glass with high refractive index and optical element - Google Patents

Optical glass with high refractive index and optical element Download PDF

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Publication number
CN104496174A
CN104496174A CN201410674920.1A CN201410674920A CN104496174A CN 104496174 A CN104496174 A CN 104496174A CN 201410674920 A CN201410674920 A CN 201410674920A CN 104496174 A CN104496174 A CN 104496174A
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CN
China
Prior art keywords
glass
opticglass
refractive index
optical
high refractive
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Pending
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CN201410674920.1A
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Chinese (zh)
Inventor
陈帆
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LIUZHOU CHUANGYU TECHNOLOGY Co Ltd
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LIUZHOU CHUANGYU TECHNOLOGY Co Ltd
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Filing date
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Application filed by LIUZHOU CHUANGYU TECHNOLOGY Co Ltd filed Critical LIUZHOU CHUANGYU TECHNOLOGY Co Ltd
Priority to CN201410674920.1A priority Critical patent/CN104496174A/en
Publication of CN104496174A publication Critical patent/CN104496174A/en
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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

Abstract

The invention provides an optical glass with high refractive index and an optical element. The optical glass comprises the following components: SiO2, B2O3, BaO, CaO, WO3, ZnO, Nb2O5, Li2O, Ta2O5 and Gd2O3. SB2O3 as the oxide can improve the thermal stability and chemical stability of the glass, and can reduce the softening temperature and fluid viscosity of the glass. BaO can increase the refractive index, density, luster and stability of the optical glass. ZnO can reduce the glass thermal expansion coefficient and density of the glass and improve the chemical stability, thermal stability and the refractive index of the glass. Gd2O3 is an effective component to improve the refractive index and increase the Abbe number of the glass. Experiment results show that the optical glass with high refractive index has refractive index of 1.90-1.96, Abbe number of 52-58, transmission ratio reaching 80%, and the corresponding wavelength less than 370 nm.

Description

A kind of opticglass of high refractive index and optical element
Technical field
The present invention relates to glass technology field, particularly relate to a kind of opticglass and optical element of high refractive index.
Background technology
In recent years, along with increased popularity such as digital camera, digital camera, camera cell phones, the integrated level for the equipment of optical system increases and function increases sharply, so require that optical system has higher accuracy, lighter weight and less size.Therefore, aspherical mirror is widely used, and uses aspherical components to become the main flow of optical design.
The manufacture of non-spherical lens widely uses the method for accurate die pressing.So-called accurate die pressing, be exactly under certain temperature, pressure, with the high-accuracy mould moulded glass prefabricated component with predetermined prod shape, thus acquisition has the finished product shape or is in close proximity to the finished product shape, and has the glasswork in optical function face.Adopt the non-spherical lens of accurate die pressing technology manufacture not need to carry out grinding and polishing again, thus can operation be simplified.Such as: Chinese patent ZL200310114721.7,200710006345.8, No. 4286652nd, Japanese Patent, No. 4322217th, special permission, JP 2006-225220, US Patent No. 6912093, disclose this type of low-dispersion optical glass for mold in the document such as US7490485 and european patent application 1433757A1, but have no the material that can be used for precise compression molding.
Opticglass transmittance affects comparatively large by specific refractory power, the higher often transparence of specific refractory power is lower. and such as, Chinese patent CN101492247A discloses a kind of opticglass, and specific refractory power is 1.8 ~ 2.1, when transmittance reaches 80%, and corresponding wavelength is at more than 400nm.Therefore, it is 1.90 ~ 1.96 that above-mentioned opticglass all cannot meet specific refractory power, and Abbe number is 52 ~ 58, when transmittance reaches 80%, and corresponding wavelength is less than the requirement of 370nm,
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of specific refractory power to be 1.90 ~ 1.96, and Abbe number is 52 ~ 58, when transmittance reaches 80%, and corresponding wavelength is less than opticglass and the optical element of 370nm.
In view of this, the invention provides a kind of opticglass of high refractive index, comprise following composition:
The SiO of 27wt% ~ 34wt% 2;
The B of 5wt% ~ 11wt% 2o 3;
The BaO of 13wt% ~ 18wt%;
The CaO of 1wt% ~ 5wt%;
The WO of 4wt% ~ 7wt% 3;
The ZnO of 2wt% ~ 6wt%;
The Nb of 5wt% ~ 10wt% 2o 5;
The Li of 2wt% ~ 6wt% 2o;
The Ta of 8wt% ~ 13wt% 2o 5;
The Gd of 11wt% ~ 19wt% 2o 3.
Preferably, comprising:
The SiO of 28wt% ~ 32wt% 2.
Preferably, comprising:
The B of 6wt% ~ 9wt% 2o 3.
Preferably, comprising:
The BaO of 14wt% ~ 16wt%.
Preferably, comprising:
The CaO of 2wt% ~ 4wt%.
Preferably, comprising:
The WO of 5wt% ~ 6wt% 3.
Preferably, comprising:
The ZnO of 3wt% ~ 5wt%.
Preferably, comprising:
The Nb of 6wt% ~ 8wt% 2o 5.
Preferably, specific refractory power is 1.90 ~ 1.96;
Abbe number is 52 ~ 58;
When transmittance reaches 80%, corresponding wavelength is less than 370nm.
Accordingly, the present invention also provides the optical element that the opticglass described in a kind of technique scheme is formed.
The invention provides a kind of opticglass and optical element of high refractive index, comprise following composition: the SiO of 27wt% ~ 34wt% 2; The B of 5wt% ~ 11wt% 2o 3; The BaO of 13wt% ~ 18wt%; The CaO of 1wt% ~ 5wt%; The WO of 4wt% ~ 7wt% 3; The ZnO of 2wt% ~ 6wt%; The Nb of 5wt% ~ 10wt% 2o 5; The Li of 2wt% ~ 6wt% 2o; The Ta of 8wt% ~ 13wt% 2o 5; The Gd of 11wt% ~ 19wt% 2o 3.SiO 2there is the effect maintaining glass devitrification resistance, and there is the effect of the grid component forming glass.B 2o 3thermostability and the chemical stability of glass can be improved as oxide compound, and the softening temperature of glass and the effect of kinetic viscosity can be reduced.BaO can increase the specific refractory power of opticglass, density, gloss and stability, glass.ZnO can reduce thermal expansivity and the density of glass, improves the chemical stability of glass, thermostability and specific refractory power.Gd 2o 3the effective constituent improving glass refraction, increase Abbe number.Experimental result shows, the specific refractory power of the opticglass of high refractive index provided by the invention is 1.90 ~ 1.96, and Abbe number is 52 ~ 58, when transmittance reaches 80%, and corresponding wavelength is less than 370nm.
Embodiment
In order to understand the present invention further, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these describe just for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
The embodiment of the invention discloses a kind of opticglass of high refractive index, comprise following composition:
The SiO of 27wt% ~ 34wt% 2;
The B of 5wt% ~ 11wt% 2o 3;
The BaO of 13wt% ~ 18wt%;
The CaO of 1wt% ~ 5wt%;
The WO of 4wt% ~ 7wt% 3;
The ZnO of 2wt% ~ 6wt%;
The Nb of 5wt% ~ 10wt% 2o 5;
The Li of 2wt% ~ 6wt% 2o;
The Ta of 8wt% ~ 13wt% 2o 5;
The Gd of 11wt% ~ 19wt% 2o 3.
SiO 2being important glass-former oxide compound, forming irregular contiguous network with the structural unit of silicon-oxy tetrahedron, is the skeleton forming opticglass.SiO 2there is the effect maintaining glass devitrification resistance.SiO 2content more than 34wt% time, the meltability of opticglass reduces, and softening temperature raises.SiO 2content be preferably 28wt% ~ 32wt%.
B 2o 3the required component improving meltbility, B 2o 3add the melting and clarification that contribute to adding glass, in addition, B 2o 3also there is the effect regulating glass viscosity, make glass have wider forming temperature scope.B 2o 3content be preferably 6wt% ~ 9wt%, B 2o 3too high levels, then can because of boron oxygen triangle body increase, increase the coefficient of expansion of glass on the contrary, boron abnormal phenomena occur.
BaO can increase the specific refractory power of opticglass, gloss and chemical stability, and BaO effectively can also reduce glass viscosity simultaneously.If BaO content is too high, significantly can damages the resistance to volatile of glass, and improve second-order transition temperature; Content is too low, makes glass refraction be difficult to reach 1.90.The content of the preferred control BaO of the present invention is 14wt% ~ 16wt%.
CaO act as stablizer in opticglass, can increase chemical stability and the physical strength of opticglass, reduces the density of opticglass.The content of CaO is preferably 2 ~ 4wt%.When the content of CaO is greater than 4wt%, the crystallization tendency of opticglass increases, and makes opticglass embrittlement.
WO 3it is a kind of component improveing opticglass devitrification resistance.WO 3content be preferably 5wt% ~ 6wt%.Work as WO 3content more than 7wt% time, opticglass is to the influx and translocation of short wave ranges, and opticglass will easily develop the color.
ZnO can reduce thermal expansivity and the density of glass, improves the chemical stability of glass, thermostability and specific refractory power.The content of ZnO is preferably 3 ~ 5wt%.
Nb 2o 5be the component of giving glass high refractive index, and there is the effect of the devitrification resistance improving glass.Nb 2o 5content be preferably 6 ~ 8wt%.Nb 2o 5when content is higher than 10wt%, glass dispersion can be caused to raise, make the shortwave transmitance of glass decline simultaneously.
Li 2o is strong solubility promoter, can reduce the softening temperature of glass.Work as Li 2when O content is more than 6wt%, the devitrification resistance of opticglass and specific refractory power reduce, the crystallization of aggravation glass and devitrification.Li 2the content of O, lower than during for 2wt%, does not reach the object reducing transition temperature and softening temperature.Li 2the content of O is preferably 2wt% ~ 3wt%.
Ta 2o 5the component of giving opticglass high refractive index and low dispersion property, can effective reinforcing glass stability.Ta 2o 5content more than 13wt% time, the meltability of opticglass is weakened, and the transition temperature of glass raises.Ta 2o 5content be preferably 9wt% ~ 10wt%.
Gd 2o 3the effective constituent improving glass refraction, increase Abbe number.Gd 2o 3content when being greater than 19wt%, the devitrification resistance of opticglass declines.Gd 2o 3content be preferably 12wt% ~ 15wt%.
Optical glass refractive index provided by the invention is high, and specific refractory power is 1.90 ~ 1.96, and Abbe number is 52 ~ 58, when transmittance reaches 80%, and corresponding wavelength is less than 370nm.
The present invention also provides a kind of optical element formed by the opticglass described in 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 as follows.
Wherein specific refractory power (nd) value is the annealing value of (-2 DEG C/h)-(-6 DEG C/h), and 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 temperature range, temperature often raises 1 DEG C, on the expansion curve of sample, low-temperature region and high-temperature area straight line portion are extended and intersects, the temperature corresponding to its intersection point.
Glass is made into the sample of 10mm ± 0.1mm thickness, tested glass reaches the wavelength X of 80% correspondence in transmittance 80.
The schlieren instrument of striped pointolite and lens composition, from the direction of the striped the most easily seen, makes comparisons with standard test specimen and checks, detect striped under prescribed conditions.Striped more than A0 level is without macroscopic striped.
The testing method that glass blister quality specifies by GB/T7962.8-1987 is measured.
The testing method that viscosity specifies according to ASTM C965 standard, tests with rotational viscosimeter.
Optical element of the present invention is formed by above-mentioned opticglass, and specific refractory power is 1.90 ~ 1.96; Abbe number is 52 ~ 58, when transmittance reaches 80%, and corresponding wavelength is less than 370nm.Optical element provided by the invention is applicable to digital camera, Digital Video and camera cell phone etc.
For the preparation method of opticglass provided by the invention, there is no particular restriction, is prepared according to method well known to those skilled in the art.Carried out by raw material melting, clarify, lower the temperature after homogenizing, inject the metal pattern of preheating, annealing obtains opticglass.
In order to understand the present invention further, be described in detail to technical scheme provided by the invention below in conjunction with embodiment, protection scope of the present invention is not limited by the following examples.
Raw material corresponding to the composition of opticglass in embodiment 1 ~ 6 is weighed in proportion, fully adds in platinum crucible after mixing, lower the temperature after fusing at 950 ~ 1260 DEG C, clarification, homogenizing;
Metal pattern after melten glass being poured into preheating at about 550 ~ 600 DEG C;
The melten glass of the metal pattern after injection preheating is put into after annealing furnace Xu Leng anneals together with metal pattern and obtains opticglass, the correlation parameter of measuring optical glass.The opticglass that embodiment 1 ~ 6 provides not crystallization, not devitrification 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.
The opticglass component percentages that embodiment 1 ~ 6 provides and corresponding performance as shown in table 1.
The component percentages of the opticglass that table 1 embodiment 1 ~ 6 provides and corresponding performance
As can be seen from above-described embodiment, the opticglass that the embodiment of the present invention provides and optical element specific refractory power are 1.90 ~ 1.96; Abbe number is 52 ~ 58; When transmittance reaches 80%, corresponding wavelength is less than 370m.
The explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. an opticglass for high refractive index, is characterized in that, comprises following composition:
The SiO of 27wt% ~ 34wt% 2;
The B of 5wt% ~ 11wt% 2o 3;
The BaO of 13wt% ~ 18wt%;
The CaO of 1wt% ~ 5wt%;
The WO of 4wt% ~ 7wt% 3;
The ZnO of 2wt% ~ 6wt%;
The Nb of 5wt% ~ 10wt% 2o 5;
The Li of 2wt% ~ 6wt% 2o;
The Ta of 8wt% ~ 13wt% 2o 5;
The Gd of 11wt% ~ 19wt% 2o 3.
2. opticglass according to claim 1, is characterized in that, comprising: the SiO of 28wt% ~ 32wt% 2.
3. opticglass according to claim 1, is characterized in that, comprising: the B of 6wt% ~ 9wt% 2o 3.
4. opticglass according to claim 1, is characterized in that, comprising: the BaO of 14wt% ~ 16wt%.
5. opticglass according to claim 1, is characterized in that, comprising: the CaO of 2wt% ~ 4wt%.
6. opticglass according to claim 1, is characterized in that, comprising: the WO of 5wt% ~ 6wt% 3.
7. opticglass according to claim 1, is characterized in that, comprising: the ZnO of 3wt% ~ 5wt%.
8. opticglass according to claim 1, is characterized in that, comprising: the Nb of 6wt% ~ 8wt% 2o 5.
9. opticglass according to claim 1, is characterized in that,
Specific refractory power is 1.90 ~ 1.96;
Abbe number is 52 ~ 58;
When transmittance reaches 80%, corresponding wavelength is less than 370nm.
10. the optical element that the opticglass described in claim 1 ~ 9 any one is formed.
CN201410674920.1A 2014-11-21 2014-11-21 Optical glass with high refractive index and optical element Pending CN104496174A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201410674920.1A CN104496174A (en) 2014-11-21 2014-11-21 Optical glass with high refractive index and optical element

Publications (1)

Publication Number Publication Date
CN104496174A true CN104496174A (en) 2015-04-08

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4390638A (en) * 1980-07-14 1983-06-28 Schott Glaswerke Acidproof, hydrolysis-resistant optical and ophthalmic glass of low density
JPH0624789A (en) * 1992-03-27 1994-02-01 Carl Zeiss:Fa High-refractive-index opthalmic and optical glass
CN102167508A (en) * 2010-12-17 2011-08-31 成都赛林斯科技实业有限公司 Optical glass with high refraction index and manufacturing method thereof
CN103717542A (en) * 2011-07-29 2014-04-09 株式会社小原 Optical glass

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4390638A (en) * 1980-07-14 1983-06-28 Schott Glaswerke Acidproof, hydrolysis-resistant optical and ophthalmic glass of low density
JPH0624789A (en) * 1992-03-27 1994-02-01 Carl Zeiss:Fa High-refractive-index opthalmic and optical glass
CN102167508A (en) * 2010-12-17 2011-08-31 成都赛林斯科技实业有限公司 Optical glass with high refraction index and manufacturing method thereof
CN103717542A (en) * 2011-07-29 2014-04-09 株式会社小原 Optical glass

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Application publication date: 20150408