CN102153279B - Optical glass for precision molding - Google Patents
Optical glass for precision molding Download PDFInfo
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- CN102153279B CN102153279B CN2010101192566A CN201010119256A CN102153279B CN 102153279 B CN102153279 B CN 102153279B CN 2010101192566 A CN2010101192566 A CN 2010101192566A CN 201010119256 A CN201010119256 A CN 201010119256A CN 102153279 B CN102153279 B CN 102153279B
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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
- C03C3/062—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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
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Abstract
The invention relates to an optical glass for precision molding, of which the refractive index eta[d] is greater than 1.67 and smaller than 1.70, the Abbe number vd is greater than 52.0 and smaller than 55.0, and the glass transition temperature T[g] is lower than 550 DEG C. The optical glass for precision molding comprises the following components in percentage by weight: 5.5-15% of SiO2, 2.6-8% of LiO2, 20-40% of B2O3, 21.5-35% of La2O3, 0.5-10% of Y2O3, 0.1-8% of Ta2O5, 0.1-5% of ZrO2, 1-35% of ZnO, 0-15% of SrO, 0-22% of BaO, 0-10% of Al2O3, 0-2% of Na2O, 0-1% of Sb2O3, 0-1% of SnO2 and 0-1% of CeO2.
Description
Technical field
Relate generally to opticglass of the present invention especially, the present invention relates to be suitable for the opticglass of accurate die pressing, more particularly, the present invention relates to have high refractive index, hangs down the accurate die pressing opticglass of degree of dispersion and lower glass transition temperatures.Simultaneously, this glass element evaporation in mold process low and not with the moulding stock adhesion.
Background technology
In recent years, the product on optics and field of photoelectric technology market is tending towards more and more microminiaturized.For the demand of more and more less end product, and the continuous growth of the stand-alone assembly of this end product and miniaturization of components demand, verified this point.For the manufacturer of opticglass, this development means, except the quality raising of finished product, requires undoubtedly reducing of raw material glass volume.Simultaneously, increase from the cost pressure of aftertreatment technology for glass manufacturers, can produce obviously more waste material because produce this less element of being made by glass block and/or ingot.
Replace and at present commonly remove processing method for the glass part of optical element from glass block or glass ingot, recently can obtain immediately glass melting after as far as possible near final profile or finally the production technique of the preformed member of geometrical shape become very important.For example, improved and reprocessed factory for the requirement of preformed member, described preformed member approaches and is used for the final geometrical shape of compacting again, that is, and and so-called " accurate piece ".Usually, term " accurate piece " refers to preferred flame polish fully, and freely or the glass part of semi-free shaping, it has been divided into glass part and has had geometrical shape close to the optical element net shape.
This " accurate piece " also preferably can or change optical element into by " accurate die pressing " or " pressure-sizing system " by so-called " accurate compacting ".Described optical element refers to lens, non-spherical element etc., and these words are synonyms.Therefore, no longer need for example by surface finish, the geometrical shape on described surface further to be processed.Because utilize this technique, the volume of melten glass is less, and mode is more flexible, so set time is shorter.Usually, because the product geometrical shape is little, and the usage quantity of this series products is relatively less and the replacing amount is also less, therefore, to further improve value-added content of product can not be only based on the value of starting material itself, be installable state and be based on that product after compacting should be in, namely, the aftertreatment of no longer essential effort, cooling and/or deepfreeze again.Because the high precision of desired geometrical shape, this pressing step must use high-grade precision equipment, thereby must use expensive moulding stock.But the life-span of this mould has affected the profitability of product and/or prepared material greatly.For the long lifetime of mould, a very important factor is to use alap working temperature, but this temperature only can be reduced to certain point, and under this point, the viscosity of material to be pressed still is enough to be used for described pressing step.This means in treatment temp, also, at the transition temperature T of pending glass
g, and having direct cause-effect relationship between the profit of this pressing treatment: the transition temperature of glass is lower, and the life-span of mould is longer, thereby profit is larger.Therefore, need so-called " low T
gGlass ", that is, have the glass of low melting point and transition temperature, also, have the glass that is enough to the viscosity processed at alap temperature.
In accurate die pressing is processed, glass is key request for accurate die pressing to the non-blocking of die surface, because the frequent glass contact with being bordering on melting in the surface of glass molds compression mould and shaping dies, any interaction between them all can produce adhesion, perhaps even produces the adhesion between glass and moulding stock.This adhesion or adhesion may cause glasswork or die surface or adhesion wear both and destruction.In modern process of glass, the requirement that improves glass quality constantly increases, and wishes the more strictly tolerance of controlling dimension, requires simultaneously the life-span of mould longer, and productivity is higher, and this is requirement economically.Thereby new improved glass composition with non-blocking energy is very important.
Another important factor is that glass should have less element evaporation, and less with the reactivity of the mould of accurate die pressing.B
2O
3And Li
2O is easily volatilization in accurate die pressing is processed.The problem of a key is to suppress B
2O
3And Li
2The volatilization of O in accurate pressing process is with the accuracy that keeps the rear glass of accurate compacting to form.
P2000-119036A has described the opticglass that is used for accurate compacting, and wherein the concentration of CaO is 5-20wt.%, La
2O
3Lower than 21wt.%, this can not effectively increase specific refractory power and suppress B
2O
3And Li
2The volatilization of O.JP 2001-130924 discloses a kind of opticglass with high refractive index for accurate pressing process, and described glass contains the CaO of 2wt% at least.US6,806,217B2 have described the mould lens glass, and described glass contains the CaO of 4wt% at least.In the accurate die pressing process, the glass that contains CaO has higher volatilization and Elements Diffusion, and the glass that contains CaO easily with moulding stock in common platinum and wolfram varbide react.The existence of CaO can increase B in accurate die pressing technique
2O
3And Li
2The volatilization of O, the quality that this can destroy mould and reduce opticglass.
JP1286934 discloses a kind of low melting glass, and the shortcoming of these glass is: easy and die surface adhesion, the volatilization degree is high in accurate die pressing is processed.
JP 60-221338 discloses a kind of opticglass of the high refractive index for accurate die pressing technique, but because the devitrification temperature of this glass is suitable for temperature under accurate die pressing viscosity higher than glass, described glass is unsuitable for by using accurate die pressing to produce opticglass.In addition, the shortcoming of described glass is: easy and die surface adhesion, glass ingredient has higher volatilization in accurate die pressing is processed.
In practice, have the angle of the optical articles of difference or complicated shape from formation, improved the requirement to moldable glass.Moldable glass refers to and can form glass difference or complicated shape by precision modulding, should have the characteristic that viscosity with temperature slowly changes.Glass with the slow variation characteristic of viscosity can have larger working range, so the range of choice of mold pressing parameter is larger.
Another noticeable phenomenon is, along with the further raising to environmental requirement, the further enhancing of people's environmental consciousness, and to improving the requirement of processing environment, realize that the environmental friendliness in the glass processing manufacturing more and more causes people's extensive concern, therefore, not using or as far as possible still less use poisonous, objectionable constituent is developing direction of following " green " glass.
In sum, be used for the glass of accurate die pressing at present, following several aspects are demanded urgently improving:
1) change or optimize glass ingredient, thereby reduce the adhesion between glass and mould;
2) further reduce in glass element processing or the volatilization in the accurate die pressing process so that last glass forms more accurate;
3) further improve specific refractory power, the reduction degree of dispersion of glass, improve glass properties,
4) reduce the T of glass
g, increase the accurate die pressing mold use life-span, and
5) do not use or use less poisonous and harmful element to realize environmental friendliness.
Summary of the invention
For this purpose, the present inventor has found a kind of novel accurate die pressing optical glass composition through long-term research and practice, can realize further reducing the T of glass
gThereby, reduce the adhesion between glass and mould; Further improve simultaneously the specific refractory power of glass and reduce the dispersion degree, realizing improving the purpose of glass properties.In addition, use glass of the present invention can realize the environmental friendliness processing and manufacturing.
Specifically, the object of the present invention is to provide a kind of required favourable optical property (η that has
d/ ν
d) opticglass, simultaneously can realize lower T
g, particularly, do not use PbO and As
2O
3This glass is suitable for suppressing by precision and is further processed, and is applicable to the Application Areass such as drawing, projection, telecommunications, fiber-optic communication project, portable hard drive and laser technology.
The specific refractory power η of glass of the present invention
dBe 1.67＜η
d＜1.70, be preferably 1.68＜η
d＜1.70,1.690＜η more preferably
d＜1.695, Abbe number ν
dBe 52.0＜ν
d＜55.0, be preferably 52.0＜ν
d＜54.0,52.0-53.6 more preferably, transition temperature T
g＜550 ℃.
Glass of the present invention based on glass composition gross weight (as follows), comprising:
Form wt.%
SiO
2 5.5-15％
Li
2O 2.6-8％
B
2O
3 20-40％
La
2O
3 21.5-35％
Y
2O
3 0.5-10％
Ta
2O
5 0.1-8％
ZrO
2 0.1-5％
ZnO 1-35％
SrO 0-15％
BaO 0-22％
Al
2O
3 0-10％
Na
2O 0-2％
Sb
2O
3 0-1％
SnO
2 0-1％
CeO
2 0-1％
Further preferred, glass of the present invention comprises:
Form wt.%
SiO
2 6-14％
Li
2O 2.6-6％
B
2O
3 20-35％
La
2O
3 21.5-30％
Y
2O
3 3-10％
Ta
2O
5 0.1-6％
ZrO
2 0.5-4％
ZnO 2-20％
SrO 5-15％
BaO 5-22％
Al
2O
3 0.01-5％
Na
2O 0-1％
Sb
2O
3 0.01-0.5％
SnO
2 0-0.5％
CeO
2 0-0.5％
Further preferred glass of the present invention comprises:
Form wt.%
SiO
2 7-10％
Li
2O 2.8-4.5％
B
2O
3 22.5-27.5％
La
2O
3 21.5-24％
Y
2O
3 3-6.5％
Ta
2O
5 0.8-2.3％
ZrO
2 1.8-2.4％
ZnO 3.8-6.8％
SrO 7.8-13％
BaO 15-20％
Al
2O
3 0.03-0.2％
Na
2O 0-0.5％
Sb
2O
3 0.01-0.3％
SnO
2 0-0.05％
CeO
2 0-0.05％
Glass of the present invention with above-mentioned composition, due to have high surface can, thereby less with the die surface adhesion in accurate pressing treatment.
Have the glass of the present invention of above-mentioned composition, it can reduce B
2O
3And Li
2The volatilization degree of O can keep forming the accuracy of content after accurate die pressing.
Glass of the present invention does not contain CaO.The glass that does not contain CaO has lower element evaporation and diffusion in accurate die pressing technique, in itself and moulding stock the reaction of common SiC, vitreous carbon and wolfram varbide less, extended die life.
Glass composition of the present invention with above-mentioned composition is suitable for accurate die pressing, have in the accurate die pressing treating processes less element evaporation and with moulding stock in common SiC, vitreous carbon and wolfram varbide, and the reaction of the Coating Materials platinum of mould is less.Glass of the present invention has good manufacturing property and processing characteristics, can be used for the technical fields such as lens, telecommunications, optical communication technique and/or laser.
The present invention has the accurate die pressing opticglass of high refractive index and low degree of dispersion, for more favourable application, can need not refining and the manufacturing optical module, for example is used for the lens of digital camera.Optical module by the accurate die pressing manufacturing can be applicable to the fields such as imaging, projection, telecommunications, fiber-optic communication project and laser technology.
The detailed description of invention
In accurate die pressing was processed, the transition temperature of glass was lower, and the mold use life-span is longer, thereby profit is higher.Therefore, exist so-called " low T
gGlass " demand, that is, have the glass of low melting point and transition temperature, that is, have the glass that is enough to the viscosity that can process at alap temperature.In the present invention, the T of glass
gLower than 550 ℃.Except low transition temperature, glass should have less element evaporation and with moulding stock in the less reaction of common platinum, wolfram varbide.
Glass of the present invention does not contain CaO.The glass that does not contain CaO has lower volatilization and Elements Diffusion in accurate die pressing technique, in itself and moulding stock the reaction of common SiC, vitreous carbon and wolfram varbide less, extended die life.The catastrophe characteristics that CaO makes glass have viscosity with temperature, this be unsuitable for forming have high quality, complex-shaped optical articles.The moldability of glass that does not contain CaO is larger.Mouldable glass refers to and can form different or complex-shaped glass by precision modulding.Have slowly that the glass of viscosity variation characteristic can have larger operating temperature range, make die parameters have larger range of choice.
The La of glass of the present invention
2O
3Ratio is at least 21.5wt%, La
2O
3Ratio 35wt% at the most, preferred 21.5-30wt%, more preferably 21.5-24wt%.Minimum ratio should be lower than 21.5wt%, guaranteeing high specific refractory power, but should not exceed maximum ratio yet, otherwise will be difficult to form described glass.The La that contains above-mentioned compositing range
2O
3Glass can reduce adhesion with moulding stock because La
2O
3Can increase the surface tension of glass.Simultaneously, the La that contains above-mentioned compositing range
2O
3Glass can suppress B
2O
3And Li
2The volatilization of O, this can keep the accuracy of composition after accurate die pressing.
Glass of the present invention contains the CeO of 1wt% at the most
2, preferred 0-0.5wt%, more preferably 0-0.05wt%, this can improve radiation hardness stability and can be used for laser uses, and for example, is used for the aspheric lens of laser diode.
Glass of the present invention contains the BaO of 22wt% at the most, preferred 5-22wt%, and more preferably 15-20wt%, can reduce glass viscosity, suppresses B in the accurate die pressing processing
2O
3And Li
2The volatilization of O.Advantage be reduce with moulding stock in common platinum and the adhesion of wolfram varbide, extend die life.BaO makes the viscosity with temperature of glass slowly change and change, and this is applicable to form high quality, complex-shaped optical articles.The glass that contains BaO can have larger moldability.Mouldable glass refers to and can form different or complex-shaped glass by precision modulding.Glass with the slow variation characteristic of viscosity can have larger operating temperature range, makes die parameters have larger range of choice.BaO with above-mentioned compositing range can reduce the enthalpy of mixing of glass system, and low enthalpy of mixing means that glass has high stability, and this can reduce the reaction with moulding stock, extends die life.
The Y of glass of the present invention
2O
3Ratio 10wt% at the most, preferred 3-10wt%, more preferably 3-6.5wt%.Y
2O
3Content will cause opticglass of the present invention to produce devitrification higher than 10wt%.
Glass of the present invention comprises Li
2The maximum of O is 8wt%, preferred 2.6-6wt%, more preferably 2.8-4.5wt%.
B
2O
3Maximum ratio be 40wt%, preferred 20-35wt%, more preferably 22.5-27.5wt%.B
2O
3Stronger one-tenth net performance has increased stability and the chemical resistance of the anti-crystallization of glass.Yet this ratio preferably should not exceed 30wt%, B
2O
3Too high levels will increase the three-dimensional space structure of an essay shape structure of inside glass, thereby network is strengthened, and cause the T of glass
gIncrease with temperature of fusion, this is undesirable according to the present invention.In addition, the B of too high amount
2O
3To produce more B
2O
3The composition volatilization, this makes and is difficult to the accurate adjustment composition, thereby increases manufacture difficulty.
The SiO as glass-former that comprises in these glass
2Amount be at least 5.5wt%, SiO
2Maximum ratio be 15wt%, preferred 6-14wt%, more preferably 7-10wt%.SiO
2Ratio increase to greater than 15wt% and will cause transition temperature to increase to higher than 550 ℃, and can reduce specific refractory power.
The Ta that glass of the present invention contains
2O
5Be 0.1wt% at least, be 8wt% to the maximum, preferred 0.1-8wt%, more preferably 0.8-2.3wt%.Ta
2O
5Guarantee high specific refractory power and have simultaneously high Abbe number, but should not exceed maximum ratio, otherwise glass will become too expensive, thus no longer economical.
The ZrO of glass of the present invention
2Ratio be 0.1-5wt%, preferred 0.5-4wt%, more preferably 1.8-2.4wt%, this can improve the water tolerance of glass.
The CeO of glass of the present invention
2Ratio be 0-1wt%, preferred 0-0.5wt%, more preferably 0-0.05wt%, this can improve the irradiation stability of opticglass, is used for laser and uses, for example the non-spherical lens of laser diode.
Glass of the present invention can contain a small amount of conventional finings.The summation of the finings that adds is 2.0wt% at the most preferably, more preferably 1.0wt% at the most, and the other one-tenth component that adds will make the component of glass composition obtain 100wt%.Glass of the present invention can contain at least a following component as finings, represents with wt%, as the complementary element of glass composition:
Sb
2O
30-1 and/or
SnO
2 0-1。
Glass of the present invention preferably contains at least a component as finings.The glass composition that contains finings has identical optical property with aforementioned opticglass composition, for example Abbe number and specific refractory power.Yet they are characterised in that good meltability and workability, due to the reduction processing cost, thereby cause production cost to reduce, and good Environmental compatibility.
Described glass is suitable for being processed into close to final profile, for example manufacturing of accurate piece, and be used for the accurate optical element that has final Precise outline with manufacturing of suppressing.
In addition, glass of the present invention can be applicable in the Application Areass such as drawing, projection, telecommunications, fiber-optic communication project, portable hard drive and laser technology.
The method for preparing glass of the present invention has no particular limits.The general fusing method of cooling that adopts prepares glass.Usually with various oxide compounds as raw material, as quartz sand, Wingdale, feldspar, soda ash, boric acid, barium compound etc., mixed preparing by a certain percentage then.Through heat, clarification, homogenizing, then cooling, casting forms with admixtion.
Explain in detail the present invention below by a series of embodiment.But the invention is not restricted to described embodiment.
Embodiment
Embodiment
Table 1 is the embodiment of the embodiment in preferred compositing range, and the glass of describing in an embodiment prepares in accordance with the following steps:
The raw material that uses is oxide compound, oxyhydroxide, carbonate and the nitrate etc. of commercially available routine, all available from Chemical Reagent Co., Ltd., Sinopharm Group (Suzhou), and chemical grade.Form by the weight of listing in table, after weighing and mixing, mixture is put into the 500ml platinum crucible.Lower the temperature after fusing under 1100-1400 ℃, clarification, homogenizing in electric furnace.Melten glass is cast in the metal die of 400 ℃ of preheatings, then glass and metal die is placed on annealing furnace annealing is cooling and can obtain.
Table 1 has provided composition, specific refractory power, Abbe number and the transition temperature of embodiment 1-6, and wherein content represents with wt% based on oxide compound.
Glass sample is made 20 * 20 * 5mm square, wherein one jiao be processed as 90 ° ± 1 ', utilize high precision V-Block refractometer (German Schott) test specific refractory power and Abbe number.
Specific refractory power and Abbe number have reflected the optical property of glass.The specific refractory power of glass means that glass is to the tortuous degree by light.Abbe number has reflected the dispersion of glass, so-called dispersion namely, glass is inconsistent to the specific refractory power of different wave length light.Abbe number ν
d=(η
d-1)/(nF-nC), η
d: the specific refractory power of d light (587.56nm), nF and nC are respectively the specific refractory poweres of F light (486.13nm) and C light (656.27nm).Every kind of opticglass has different specific refractory poweres and Abbe number.The composition of opticglass has determined that every kind of opticglass has specific specific refractory power and Abbe number scope.
The transition temperature T of glass in this experiment
g, and thermal expansivity, CTE measures on the thermal dilatometer of anti-relaxation the (DIL402PC of anti-the relaxation).After glass sample being made the bar-shaped sample of 50mm left and right, be completed from room temperature take speed as 5 ℃/min is warming up to.
Transition temperature and thermal expansivity reflect the thermal characteristics of glass, provide reference temperature point and performance index to glass post-treatment and application.When the swell increment generation cataclysm of glass, corresponding temperature is the transition temperature of sample.
Opticglass can be transformed from the solidified state into plastic stage gradually in a certain temperature range.Its transition temperature T
gRefer to that glass specimen is warming up to from room temperature the temperature of hanging down of speeding, TS, its low-temperature region and high-temperature area elongated linear partly extend the corresponding temperature of crossing intersection point.The temperature of wherein speeding to hang down, TS refers to the temperature when glass specimen stops expanding in temperature-rise period.Method by GB/T 7962.16 regulations is measured.
The transition temperature T of glass
gAnd have direct cause-effect relationship between the accurate die pressing processing: the transition temperature of glass is lower, and the life-span of mould is longer, thereby profit is larger.Therefore, need so-called " low T
gGlass ", that is, have the glass of low melting point and transition temperature.
The thermal expansivity of opticglass refers in certain temperature range, and temperature raises 1 ℃ the time, the elongation of glass per unit length.The general temperature range that detects is room temperature to 300 ℃, then provides mean thermal expansion coefficients.Stability in environment plays an important role thermal expansivity for opticglass.Usually need to there be high stability in the system of applied optics glass, if the glass material thermal expansivity is too large, when outside temperature changed, glass size changed, thereby causes system stability to reduce.
Comparative Examples
Carry out accurate die pressing by Toshiba GMP type continuous device, moulding material is WC (wolfram varbide) and is coated with the Pt-Ir coating.
At room temperature glass is positioned in mould, and is heated to 590 ℃ (corresponding to 10 in heating steps
9The glass viscosity of dPa.s).Then glass is suppressed, pressure is 10Mpa, and the press time is 10 seconds.Then after discharging pressing pressure, carry out cooling step.Use N in heating, compacting and cooling step process
2Protection.After glass cools, glass lens is taken out.Whether visual observation mould and glass to check, adhesion have occured between glass and mould.
Table 1
| Composition/wt% | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Comparative Examples 1 | Comparative Examples 2 |
| Li 2O | 4.34 | 3 | 4.14 | 3.7 | 4.34 | 3.5 | 2.5 | 4 |
| B 2O 3 | 24.2 | 25.8 | 22.7 | 25.62 | 23.2 | 25.83 | 29 | 36 |
| Al 2O 3 | 0.04 | 0.1 | 0.1 | 0.1 | 0.04 | 0.1 | ||
| SiO 2 | 7.5 | 8.5 | 9.5 | 8.42 | 9 | 9.92 | 20 | 13 |
| Na 2O | 0.5 | 2.9 | ||||||
| ZnO | 6.6 | 4 | 4 | 3.95 | 5.6 | 3.95 | 8 | |
| SrO | 12.5 | 8.7 | 10 | 8.65 | 13 | 8.65 | 1 | 11 |
| Y 2O 3 | 3 | 6.15 | 3.5 | 6.1 | 3 | 5.9 | 5 | |
| ZrO 2 | 2.2 | 2 | 2.2 | 1.95 | 2.2 | 1.95 | ||
| BaO | 15.5 | 19.15 | 19.24 | 18.8 | 16 | 17.5 | 23 | |
| La 2O 3 | 21.5 | 21.5 | 23.5 | 21.55 | 22 | 21.5 | 20 | |
| Ta 2O 5 | 2.1 | 1.01 | 1.1 | 1.1 | 1.6 | 1.1 | 1.3 | |
| CaO | 13 | 10 | ||||||
| Sb 2O 3 | 0.01 | 0.05 | 0.01 | 0.06 | 0.1 | 0.2 | 0.1 | |
| SnO2 | 0.01 | 0.04 | 0.02 | |||||
| CeO2 | 0.01 | |||||||
| Density (g/cm 3) | 3.84 | 3.87 | 3.81 | 3.84 | 3.86 | |||
| η dSpecific refractory power | 1.691 | 1.698 | 1.694 | 1.688 | 1.692 | 1.692 | 1.663 | 1.6601 |
| ν dAbbe number | 52 | 52.8 | 52.3 | 53.5 | 52.5 | 53.1 | 56.9 | 56.3 |
| T g(℃) transition temperature | 483 | 523 | 496 | 530 | 579 | 564 | ||
| CTE (25-300 ℃) coefficient of expansion | 9.8 | 9.16 | 9.64 | 9.4 | ||||
| AT (℃) softening temperature | 529 | 561 | 537 | 570 |
Table 2
| Composition/wt.% | Embodiment 4 | Comparative Examples 1 | Comparative Examples 2 |
| Li 2O | 3.7 | 2.5 | 4 |
| B 2O 3 | 25.62 | 29 | 36 |
| Al 2O 3 | 0.1 | ||
| SiO 2 | 8.42 | 20 | 13 |
| ZnO | 3.95 | 8 | 2.9 |
| SrO | 8.65 | 1 | |
| Y 2O 3 | 6.1 | 5 | 11 |
| ZrO 2 | 1.95 | ||
| BaO | 18.8 | ||
| La 2O 3 | 21.55 | 20 | 23 |
| Ta 2O 5 | 1.1 | 1.3 | |
| Sb 2O 3 | 0.06 | 0.2 | 0.1 |
| CaO | 13 | 10 | |
| η dSpecific refractory power | 1.688 | 1.663 | 1.6601 |
| ν dAbbe number | 53.5 | 56.9 | 56.3 |
| T g(℃) transition temperature | 523 | 579 | 564 |
| After 100 mold pressings test | Not with the mould adhesion | With the mould adhesion | With the mould adhesion |
Claims (25)
1. opticglass comprises:
This opticglass does not contain CaO.
2. opticglass as claimed in claim 1 is characterized in that the La of described glass
2O
3Ratio is 21.5-30wt%.
3. opticglass as claimed in claim 2 is characterized in that the La of described glass
2O
3Ratio is 21.5-24wt%.
4. opticglass as claimed in claim 1, the BaO ratio that it is characterized in that described glass is 15-20wt%.
5. opticglass as claimed in claim 1 is characterized in that the Y of described glass
2O
3Ratio is 3-10wt%.
6. opticglass as claimed in claim 5 is characterized in that the Y of described glass
2O
3Ratio is 3-6.5wt%.
7. opticglass as claimed in claim 5 is characterized in that the Li of described glass
2The O ratio is 2.6-6wt%.
8. opticglass as claimed in claim 7 is characterized in that the Li of described glass
2The O ratio is 2.8-4.5wt%.
9. opticglass as claimed in claim 1 is characterized in that the B of described glass
2O
3Ratio is 20-35wt%.
10. opticglass as claimed in claim 9 is characterized in that the B of described glass
2O
3Ratio is 22.5-27.5wt%.
11. opticglass as claimed in claim 1 is characterized in that the SiO of described glass
2Ratio is 6-14wt%.
12. as the opticglass of claim 11, it is characterized in that the SiO of described glass
2Ratio is 7-10wt%.
13. opticglass as claimed in claim 1 is characterized in that the Ta of described glass
2O
5Ratio be 0.1-6wt%.
14. as the opticglass of claim 13, it is characterized in that the Ta of described glass
2O
5Ratio be 0.8-2.3wt%.
15. opticglass as claimed in claim 1 is characterized in that the ZrO of described glass
2Ratio is 0.5-4wt%.
16. as the opticglass of claim 15, it is characterized in that the ZrO of described glass
2Ratio is 1.8-2.4wt%.
17. opticglass as claimed in claim 1 is characterized in that the CeO of described glass
2Ratio is 0-0.5wt%.
18. as the opticglass of claim 17, it is characterized in that the CeO of described glass
2Ratio is 0-0.05wt%.
19. an opticglass comprises:
This opticglass does not contain CaO.
20. an opticglass comprises:
This opticglass does not contain CaO.
21. opticglass as described in any one in claim 1 to 20 is characterized in that the specific refractory power η of described glass
dBe 1.67＜η
d＜1.70, Abbe number ν
dBe 52.0＜ν
d＜55.0, second-order transition temperature T
g＜550 ℃.
22. opticglass as described in any one in claim 1 to 20 is characterized in that the specific refractory power η of described glass
dBe 1.68＜η
d＜1.70.
23. opticglass as described in any one in claim 1 to 20 is characterized in that the specific refractory power η of described glass
dBe 1.690＜η
d＜1.695.
24. opticglass as described in any one in claim 1 to 20 is characterized in that the Abbe number ν of described glass
dBe 52.0＜ν
d＜54.0.
25. opticglass as described in any one in claim 1 to 20 is characterized in that the Abbe number ν of described glass
dBe 52.0＜ν
d＜53.6.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101192566A CN102153279B (en) | 2010-02-12 | 2010-02-12 | Optical glass for precision molding |
| PCT/CN2011/070936 WO2011098043A1 (en) | 2010-02-12 | 2011-02-11 | Optical glass for precision molding |
| JP2012552250A JP2013519610A (en) | 2010-02-12 | 2011-02-11 | Optical glass for precision molding |
| CN2011800091683A CN103097314A (en) | 2010-02-12 | 2011-02-11 | Optical glass for precision molding |
| KR1020127023493A KR20130001237A (en) | 2010-02-12 | 2011-02-11 | Optical glass for precision molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101192566A CN102153279B (en) | 2010-02-12 | 2010-02-12 | Optical glass for precision molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102153279A CN102153279A (en) | 2011-08-17 |
| CN102153279B true CN102153279B (en) | 2013-11-06 |
Family
ID=44367287
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101192566A Expired - Fee Related CN102153279B (en) | 2010-02-12 | 2010-02-12 | Optical glass for precision molding |
| CN2011800091683A Pending CN103097314A (en) | 2010-02-12 | 2011-02-11 | Optical glass for precision molding |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800091683A Pending CN103097314A (en) | 2010-02-12 | 2011-02-11 | Optical glass for precision molding |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2013519610A (en) |
| KR (1) | KR20130001237A (en) |
| CN (2) | CN102153279B (en) |
| WO (1) | WO2011098043A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012100233B4 (en) | 2012-01-12 | 2014-05-15 | Schott Ag | Highly solar-resistant high-transmission glasses, their use and process for their preparation |
| CN107512849A (en) * | 2012-11-23 | 2017-12-26 | 成都光明光电股份有限公司 | Optical glass and optical element |
| JP6808385B2 (en) * | 2015-11-06 | 2021-01-06 | 株式会社オハラ | Optical glass, preform materials and optical elements |
| CN109205616B (en) * | 2018-11-21 | 2021-06-25 | 成都光明光电股份有限公司 | Optical glass, glass preform, optical element and optical instrument |
| CN111018342B (en) * | 2019-12-24 | 2022-04-15 | 成都光明光电股份有限公司 | Optical glass, glass preform, optical element and optical instrument |
| JP2021178765A (en) * | 2020-05-15 | 2021-11-18 | 日本電気硝子株式会社 | Glass material |
| CN112174517B (en) * | 2020-09-29 | 2022-04-15 | 成都光明光电股份有限公司 | Optical glass and optical element |
| CN112159098B (en) * | 2020-09-29 | 2022-02-11 | 成都光明光电股份有限公司 | Optical glass, optical element and optical instrument |
| CN113651522B (en) * | 2021-09-14 | 2023-08-15 | 李莉华 | Non-isothermal glass molding process |
| CN116750966A (en) * | 2023-06-20 | 2023-09-15 | 成都光明光电有限责任公司 | Radiation-resistant glass |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201018A (en) * | 1997-06-03 | 1998-12-09 | 株式会社小原 | Optical glass |
| CN1323281A (en) * | 1998-10-12 | 2001-11-21 | 株式会社小原 | Optical glass for mold pressing and optical element |
| CN1967287A (en) * | 2005-11-16 | 2007-05-23 | 日本电气硝子株式会社 | Optical glass for pressure forming |
| CN101293736A (en) * | 2007-04-23 | 2008-10-29 | 亚洲光学股份有限公司 | Optical glass |
| US20080318758A1 (en) * | 2006-02-20 | 2008-12-25 | Asahi Glass Company, Limited | Optical glass |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001130924A (en) * | 1999-10-28 | 2001-05-15 | Hoya Corp | Glass for precision press molding, optical parts and method for production thereof |
| US8507394B2 (en) * | 2005-04-22 | 2013-08-13 | Ohara Inc. | Glass composition |
| JP5561888B2 (en) * | 2005-10-11 | 2014-07-30 | 株式会社オハラ | Optical glass |
| EP2206690B1 (en) * | 2007-10-05 | 2016-03-30 | Olympus Corporation | Optical glass, and optical device having the optical glass |
-
2010
- 2010-02-12 CN CN2010101192566A patent/CN102153279B/en not_active Expired - Fee Related
-
2011
- 2011-02-11 WO PCT/CN2011/070936 patent/WO2011098043A1/en active Application Filing
- 2011-02-11 CN CN2011800091683A patent/CN103097314A/en active Pending
- 2011-02-11 JP JP2012552250A patent/JP2013519610A/en not_active Withdrawn
- 2011-02-11 KR KR1020127023493A patent/KR20130001237A/en not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201018A (en) * | 1997-06-03 | 1998-12-09 | 株式会社小原 | Optical glass |
| CN1323281A (en) * | 1998-10-12 | 2001-11-21 | 株式会社小原 | Optical glass for mold pressing and optical element |
| CN1967287A (en) * | 2005-11-16 | 2007-05-23 | 日本电气硝子株式会社 | Optical glass for pressure forming |
| US20080318758A1 (en) * | 2006-02-20 | 2008-12-25 | Asahi Glass Company, Limited | Optical glass |
| CN101293736A (en) * | 2007-04-23 | 2008-10-29 | 亚洲光学股份有限公司 | Optical glass |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102153279A (en) | 2011-08-17 |
| JP2013519610A (en) | 2013-05-30 |
| CN103097314A (en) | 2013-05-08 |
| KR20130001237A (en) | 2013-01-03 |
| WO2011098043A1 (en) | 2011-08-18 |
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