CN101759359A - High-refraction low-dispersion optical glass for mold pressing - Google Patents
High-refraction low-dispersion optical glass for mold pressing Download PDFInfo
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- CN101759359A CN101759359A CN200910312234A CN200910312234A CN101759359A CN 101759359 A CN101759359 A CN 101759359A CN 200910312234 A CN200910312234 A CN 200910312234A CN 200910312234 A CN200910312234 A CN 200910312234A CN 101759359 A CN101759359 A CN 101759359A
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Abstract
The invention relates to glass of the following optical constants: the refractive index is more than 1.82 and less than or equal to 1.90 and the dispersion coefficient (vd) is 38-45. The glass has excellent transmittance, low transformation temperature and good chemical stability and is suitable for precise compression molding. The high-refraction low-dispersion optical glass for mold pressing has the following optical constants: the refractive index is more than 1.82 and is less than or equal to 1.90 and the dispersion coefficient (vd) is 38-45. The glass contains necessary components of SiO2, B2O3, La2O3, Gd2O3, ZnO and Ta2O5, and when the transmittance reaches 70 percent, the corresponding wavelength is below 385nm. By containing certain amounts of SiO2, B2O3, La2O3, Gd2O3, Ta2O5 and ZnO, the optical glass which has the optical constants, excellent transmittance, low transformation temperature and good chemical stability can be obtained and is suitable for precise compression molding.
Description
Technical field
The present invention relates to a kind of high-refraction low-dispersion optical glass for mold, and the moulded glass prefabricated component, the optical element that obtain by this glass.Further, the present invention relates to a kind of have specific refractory power (nd) greater than 1.82 smaller or equal to 1.90, abbe number (vd) is the high-refraction low-dispersion optical glass for mold of 38-45 scope, and the moulded glass prefabricated component, the optical element that are obtained by this glass.
Background technology
The low dispersivity opticglass of high refraction is widely applied in optical design, particularly optical constant greater than 1.82 smaller or equal to 1.90, abbe number (vd) is the opticglass of 38-45 scope.But it is bigger that common opticglass transmittance is influenced by specific refractory power, the high more often transmitance meeting of specific refractory power variation, the aggravation of glass coloring tendency.
In addition, during the precise compression molding glass elements, owing to must carry out mold pressing under hot environment, oxidation, burn into or the demoulding damage of the forming face of mold taking place easily, is difficult to realize low-cost batch process the in batches.Therefore, the glass that uses in the precision moulded formation should have low transition temperature (Tg) as far as possible, and compression molding has also proposed higher requirement to the chemical stability such as acidproof, water-fast of glass.
For opticglass, the coefficient of expansion is high more, in the shock heating quenching engineering before and after the compression moulding, and the easy more breakage of glass, thereby the big glass of the coefficient of expansion also is not suitable for precise compression molding cheaply.
Summary of the invention
To be solved by this invention provide a kind of have specific refractory power greater than 1.82 smaller or equal to 1.90, abbe number (vd) is the glass of 38-45 scope optical constant, this glass transmissivity excellence, glass transformation temperature is low, chemical stability is good, and is suitable for precision moulded formation.
The technical scheme that technical solution problem of the present invention is adopted is: high-refraction low-dispersion optical glass for mold pressing, have specific refractory power greater than 1.82 smaller or equal to 1.90, abbe number is the optical constant of 38-45 scope, contains SiO
2, B
2O
3, La
2O
3, Gd
2O
3, ZnO, Ta
2O
5As necessary component, transmittance reaches the wavelength of 70% o'clock correspondence below 385nm.
Further, described glass transformation temperature is below 620 ℃.
Further, described glass transformation temperature is below 620 ℃, and the glass acid resistance test result of carrying out based on the testing method of standard GB/T17129 is 1 grade to 2 grades.
Further, described glass transformation temperature is below 620 ℃, and the glass acid resistance test result of carrying out based on the testing method of standard GB/T17129 is 1 grade to 2 grades, and the linear expansivity of described glass is 80 * 10
-7Below/the K.
Further, its weight percent consists of: SiO
2: greater than 0-8%, B
2O
3: 5-20%, La
2O
3: 25-45%, Gd
2O
3: 3-18%, ZnO: greater than 10-20%, ZrO
2: 0-8%, Ta
2O
5: greater than 5-20%, Li
2O+Na
2O+K
2O:0-5%, Li
2O: be no more than 0.5%, WO
3: 0-10%, Sb
2O
3: be no more than 0.2%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
Further, its weight percent consists of: SiO
2: greater than 0 less than 8%, B
2O
3: 8-20%, La
2O
3: 25-45%, Gd
2O
3: 3-18%, ZnO:12-19%, ZrO
2: 0-8%, Ta
2O
5: greater than 8-20%, Li
2O+Na
2O+K
2O:0-5%, Li
2O: be no more than 0.5%, WO
3: 0-10%, Sb
2O
3: be no more than 0.2%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
Further, its weight percent consists of: SiO
2: 2-8%, B
2O
3: 8-20%, La
2O
3: 25-40%, Gd
2O
3: 5-18%, ZnO:12-19%, ZrO
2: 0-8%, Ta
2O
5: greater than 8-18%, Li
2O+Na
2O+K
2O:0-5%, Li
2O: be no more than 0.5%, WO
3: 0-10%, Sb
2O
3: be no more than 0.1%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
Further, its weight percent consists of: SiO
2: 2-8%, B
2O
3: 8-20%, La
2O
3: 25-40%, Gd
2O
3: 5-18%, ZnO:12-19%, ZrO
2: 0-8%, Ta
2O
5: 10-18%, Li
2O:0.05-0.4%, WO
3: 0-10%, Sb
2O
3: be no more than 0.05%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
High-refraction low-dispersion optical glass for mold pressing, its weight percent consists of: SiO
2: greater than 0 less than 8%, B
2O
3: 5-20%, La
2O
3: 25-45%, Gd
2O
3: 3-18%, ZnO: greater than 10-20%, ZrO
2: 0-8%, Ta
2O
5: greater than 5-20%, Li
2O+Na
2O+K
2O:0-5%, Li
2O: be no more than 0.5%, WO
3: 0-10%, Sb
2O
3: be no more than 0.2%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%, the specific refractory power of described opticglass is greater than 1.82 smaller or equal to 1.90, and abbe number is the 38-45 scope.
Further, its weight percent consists of: SiO
2: greater than 0 less than 8%, B
2O
3: 8-20%, La
2O
3: 25-45%, Gd
2O
3: 3-18%, ZnO:12-19%, ZrO
2: 0-8%, Ta
2O
5: greater than 8-20%, Li
2O+Na
2O+K
2O:0-5%, Li
2O: be no more than 0.5%, WO
3: 0-10%, Sb
2O
3: be no more than 0.2%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
Further, its weight percent consists of: SiO
2: 2-8%, B
2O
3: 8-20%, La
2O
3: 25-40%, Gd
2O
3: 5-18%, ZnO:12-19%, ZrO
2: 0-8%, Ta
2O
5: greater than 8-18%, Li
2O+Na
2O+K
2O:0-5%, Li
2O: be no more than 0.5%, WO
3: 0-10%, Sb
2O
3: be no more than 0.1%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
Further, its weight percent consists of: SiO
2: 2-8%, B
2O
3: 8-20%, La
2O
3: 25-40%, Gd
2O
3: 5-18%, ZnO:12-19%, ZrO
2: 0-8%, Ta
2O
5: 10-18%, Li
2O:0.05-0.4%, WO
3: 0-10%, Sb
2O
3: be no more than 0.05%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
Further, the transmittance of described opticglass reaches the wavelength of 70% o'clock correspondence below 385nm, and glass transformation temperature is below 620 ℃.
Further, the acid resistance test result that described opticglass carries out based on the testing method of standard GB/T17129 is 1 grade to 2 grades, expansion coefficient of glass thread 80 * 10
-7Below/the K.
Compression molding glass preform material comprises above-mentioned high-refraction low-dispersion optical glass for mold pressing.
Optical element comprises above-mentioned high-refraction low-dispersion optical glass for mold pressing.
Optical element is by above-mentioned compression molding is obtained with the compression molding of glass preform material.
The invention has the beneficial effects as follows: by containing the SiO of specified quantitative
2, B
2O
3, La
2O
3, Gd
2O
3, Ta
2O
3, ZnO, can obtain having above-mentioned optical constant, the transmissivity excellence, glass transformation temperature is low, chemical stability is good, and be suitable for the opticglass of precision moulded formation.
Embodiment
Below glass component of the present invention is described, under the situation that is not having to specify, the content of each component is for being the weight % of benchmark with the oxide compound.
SiO
2Composition is that the network that forms glass generates oxide body, adds a certain amount of SiO
2Can increase the high temperature viscosity of glass, improve the devitrification resistance and the chemical durability of glass.But if its amount is very few, then its effect is insufficient; And if its amount too much, then glass melting is understood variation, and bubble removes difficulties.Therefore, be preferably greater than 0, more preferably 2% and contain, preferably contain as the upper limit with 8% as lower limit.
B
2O
3Composition is to become the indispensable composition of branch as network former for the group of the lanthanides glass of the low chromatic dispersion of the high refraction of the present invention.But if its amount is very few, then devitrification resistance is insufficient; If its amount too much, then the specific refractory power of glass does not reach design objective.Therefore, can preferably contain as lower limit, preferably contain as the upper limit with 20% with 5%, more preferably 8%.
La
2O
3Composition can effectively improve the specific refractory power of glass, and the abbe number of not obvious reduction glass also is the indispensable composition of glass of the present invention with high-refractivity and low-dispersion.But if its amount is very few, above-mentioned effect is not obvious; If its amount too much, then the devitrification resistance variation.Therefore, preferably contain as lower limit with 25%; Preferably contain as the upper limit with 45%, more preferably 40%.
Gd
2O
3Composition also has the specific refractory power that improves glass, the effect that makes its low chromatic dispersionization, the use Gd of an amount of ratio
2O
3, help to improve the devitrification resistance energy of high refractive low dispersive glass.But if its amount is very few, then above-mentioned effect is insufficient; If its amount too much, then the devitrification resistance variation.Therefore, preferably contain as lower limit with 3%, more preferably 5%; Preferably contain as the upper limit with 18%.
Yb
2O
3, Y
2O
3Composition is to the specific refractory power that improves glass equally, increases the composition that abbe number effectively can add arbitrarily., when containing too in a large number sometimes, make the forthright deterioration of anti-devitrification.Therefore, both total upper content limit can be preferably 10%, and more preferably 5%, most preferably be less than 3%.
Ta
2O
5Composition has the effect that improves specific refractory power, improves chemical durability and devitrification resistance, also is the indispensable component of the present invention.But if its amount is very few, then effect is insufficient; If its amount too much, then be difficult to keep the optical constant of above-mentioned scope.Therefore, can be preferably with greater than 5%, contain as lower limit more preferably greater than 8%, most preferably 10%, preferably contain as the upper limit with 20%, more preferably 18%.
Nb
2O
5Component also can be used as any composition that improves glass refraction, improves chemical stability and devitrification resistance effect.But, if too much devitrification resistance deterioration on the contrary of content, glass transmitance variation, so preferable range 0-2%.
The ZnO composition can reduce glass transformation temperature in the present invention, and can improve the glass chemistry persistence.But if its amount too much, then the specific refractory power of glass can reduce.Therefore can be preferably to contain as lower limit greater than 10%, more preferably 12%; The upper limit is preferred 20%, and more preferably 19%.
ZrO
2Composition is to have any composition of adjusting optical constant, improving chemical durability and devitrification resistance effect.But if its amount too much, then the glass devitrification resistance is understood variation, in order easily to obtain the invention effect, preferred content 0-8%.
TiO
2Component can be adjusted the glass light mathematic(al) constant, if but content is too much, glass devitrification resistance variation then, and therefore, preferable range is: 0-0.5%.
GeO
2Composition is to the raising specific refractory power, improves the composition that devitrification resistance effectively can be added arbitrarily, but owing to be the high price raw material, does not preferably add.
RO composition (being selected from the composition more than a kind or a kind of MgO, CaO, SrO and BaO composition) is effective for adjusting optical constant.But if its amount too much, then glass is easy to crystallization, and optical constant does not reach target call.Therefore, can preferably contain as the upper limit with 5%.
R
2The O composition (is selected from Li
2O, Na
2O and K
2The composition more than a kind or a kind of O composition) can reduce the transition temperature of glass.But if its amount too much, then anti-devitrification ability worsens, and significantly reduces the specific refractory power of glass simultaneously.Therefore, can preferably contain as the upper limit with 5%.Li wherein
2O contains on a small quantity and can effectively reduce glass transformation temperature and keep the not obvious increase of average coefficient of linear expansion, and glass chemistry stability is not to show to reduce, its content preferably be no more than 0.5%, more preferably content is that 0.05-0.4% contains as the upper limit.
WO
3Composition has the optical constant kept, improves the effect of devitrification of glass, but too high levels can make the glass transmitance reduce, the light transmittance variation in the short wavelength zone of visible region, and crystallization property degenerates.Therefore, can preferably contain as the upper limit with 10%.
In addition, Al
2O
3The purpose that also can be used as the chemical durability that improves glass adds, and preferably contains as the upper limit with 5%, and the occasion that worsens at stability, glass is promising good not contain.
Sb
2O
3Deaeration when composition can be used for glass melting and at random adding, if but its amount too much, the transmissivity variation in the short wavelength zone of visible region then.Therefore, can be preferably to contain as the upper limit less than 0.2%, more preferably 0.1%, most preferably 0.05%.
SnO
2Also be to use, but its clarifying effect to glass is not so good as Sb as finings
2O
3, when its usage quantity is big, can cause glass coloring simultaneously, so its usage quantity is defined as 0-1%, preferably do not use.
Lu
2O
3Composition can be added in the compositional system of the present invention by trace and improve devitrification resistance, but because the raw material costliness, preferred 1% content contains as the upper limit, does not more preferably contain.
Below, the performance of opticglass of the present invention is described
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 ".
Degree of staining (λ 70/ λ 5) is determined by the following method: thickness of sample 10mm ± 0.1mm, λ 70 is wavelength that the glass transmittance reaches 70% o'clock correspondence, is unit representation with 10nm.
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 ℃ of the every rising of temperature, on the expansion curve of sample, low-temperature region and the extension of high-temperature area straight line portion are intersected the pairing temperature of its intersection point.
Press the water-fast effect stability DW of GB/T 17129 method tested glass.
Press the acidproof effect stability of the glass DA of GB/T17192 method test.
Thermalexpansioncoefficient is meant the raise elongation of glass per unit length 1 ℃ time of temperature in the certain temperature range, press the method measurement of GB/T7962.16-1987 regulation.Provided the mean thermal expansion coefficients of 20-120 ℃ and 100-300 ℃ in table 1, the table 2
Opticglass of the present invention can be used as pressure forming glass preshaping body material, perhaps also can be directly with the melten glass pressure forming.Manufacture method and thermoforming process during as the glass preshaping body do not have special restriction, can use known manufacture method and forming method.
In addition, also can carry out press working, make optical element, perhaps also can adopt directly fusion, remollescent opticglass are carried out press working, make optical element the glass preshaping body that opticglass of the present invention is made.
In addition, optical element can be used as for example various lens such as biconvex, concave-concave, plano-convex, plano-concave, meniscus, speculum, prism, diffraction grating etc.
Embodiment
Below, describe for embodiments of the invention, but the present invention is not subjected to the qualification of these embodiment.
The opticglass of 14 embodiment of the present invention shown in the table 1-2 can followingly make, it is optics glass raw materials usually such as weighing oxide compound, oxyhydroxide, carbonate, nitrate, reach the ratio that each embodiment forms shown in the table 1-2, put in the platinum crucible after the mixing, according to forming the meltbility that produces, at 1200-1400 ℃ of following fusion 3-5 hour, refining, stirring, after homogenizing, be injected in the mold and slowly cool off promptly.With the composition of 14 embodiment of opticglass of the present invention with the specific refractory power of these glass, abbe number, transition temperature, acidproofly be shown in table 1 and the table 2 with water resistance and thermal expansivity, the composition of each component is represented with weight %.
Table 1
Table 2
Because the opticglass of 14 embodiment of the present invention all has the optical constant (specific refractory power and abbe number) in the above-mentioned scope; Transmittance reaches the wavelength of 70% o'clock correspondence below 385nm, the transmitance excellence; Glass transition temp (Tg) is below 620 ℃, therefore is suitable for sticking close die forming; And owing to powder method water tolerance, powder method acid resistance reach the 1-2 level, so chemical durability is also excellent, can stably produce; The coefficient of expansion reaches 80 * 10
-7Below, be suitable for mold pressing.
Claims (17)
1. high-refraction low-dispersion optical glass for mold pressing is characterized in that, have specific refractory power greater than 1.82 smaller or equal to 1.90, abbe number is the optical constant of 38-45 scope, contains SiO
2, B
2O
3, La
2O
3, Gd
2O
3, ZnO, Ta
2O
5As necessary component, transmittance reaches the wavelength of 70% o'clock correspondence below 385nm.
2. high-refraction low-dispersion optical glass for mold pressing as claimed in claim 1 is characterized in that, described glass transformation temperature is below 620 ℃.
3. high-refraction low-dispersion optical glass for mold pressing as claimed in claim 1 is characterized in that, described glass transformation temperature is below 620 ℃, and the glass acid resistance test result of carrying out based on the testing method of standard GB/T17129 is 1 grade to 2 grades.
4. high-refraction low-dispersion optical glass for mold pressing as claimed in claim 1, it is characterized in that, described glass transformation temperature is below 620 ℃, and the glass acid resistance test result of carrying out based on the testing method of standard GB/T17129 is 1 grade to 2 grades, and the linear expansivity of described glass is 80 * 10
-7Below/the K.
5. as the described high-refraction low-dispersion optical glass for mold pressing of the arbitrary claim of claim 1-4, it is characterized in that its weight percent consists of:
SiO
2: greater than 0-8%, B
2O
3: 5-20%, La
2O
3: 25-45%, Gd
2O
3: 3-18%, ZnO: greater than 10-20%, ZrO
2: 0-8%, Ta
2O
5: greater than 5-20%, Li
2O+Na
2O+K
2O:0-5%, Li
2O: be no more than 0.5%, WO
3: 0-10%, Sb
2O
3: be no more than 0.2%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
6. roll over the high-refraction low-dispersion optical glass for mold pressing of stating as the arbitrary claim of claim 1-4, it is characterized in that, its weight percent consists of:
SiO
2: greater than 0 less than 8%, B
2O
3: 8-20%, La
2O
3: 25-45%, Gd
2O
3: 3-18%, ZnO:12-19%, ZrO
2: 0-8%, Ta
2O
5: greater than 8-20%, Li
2O+Na
2O+K
2O:0-5%, Li
2O: be no more than 0.5%, WO
3: 0-10%, Sb
2O
3: be no more than 0.2%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
7. as the described high-refraction low-dispersion optical glass for mold pressing of the arbitrary claim of claim 1-4, it is characterized in that its weight percent consists of:
SiO
2: 2-8%, B
2O
3: 8-20%, La
2O
3: 25-40%, Gd
2O
3: 5-18%, ZnO:12-19%, ZrO
2: 0-8%, Ta
2O
5: greater than 8-18%, Li
2O+Na
2O+K
2O:0-5%, Li
2O: be no more than 0.5%, WO
3: 0-10%, Sb
2O
3: be no more than 0.1%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
8. as the described high-refraction low-dispersion optical glass for mold pressing of the arbitrary claim of claim 1-4, it is characterized in that its weight percent consists of:
SiO
2: 2-8%, B
2O
3: 8-20%, La
2O
3: 25-40%, Gd
2O
3: 5-18%, ZnO:12-19%, ZrO
2: 0-8%, Ta
2O
5: 10-18%, Li
2O:0.05-0.4%, WO
3: 0-10%, Sb
2O
3: be no more than 0.05%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
9. high-refraction low-dispersion optical glass for mold pressing is characterized in that, its weight percent consists of:
SiO
2: greater than 0 less than 8%, B
2O
3: 5-20%, La
2O
3: 25-45%, Gd
2O
3: 3-18%, ZnO: greater than 10-20%, ZrO
2: 0-8%, Ta
2O
5: greater than 5-20%, Li
2O+Na
2D+K
2O:0-5%, Li
2O: be no more than 0.5%, WO
3: 0-10%, Sb
2O
3: be no more than 0.2%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%, the specific refractory power of described opticglass is greater than 1.82 smaller or equal to 1.90, and abbe number is the 38-45 scope.
10. high-refraction low-dispersion optical glass for mold pressing as claimed in claim 9 is characterized in that, its weight percent consists of:
SiO
2: greater than 0 less than 8%, B
2O
3: 8-20%, La
2O
3: 25-45%, Gd
2O
3: 3-18%, ZnO:12-19%, ZrO
2: 0-8%, Ta
2O
5: greater than 8-20%, Li
2O+Na
2O+K
2O:0-5%, Li
2O: be no more than 0.5%, WO
3: 0-10%, Sb
2O
3: be no more than 0.2%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
11. mold pressing high-refraction low-dispersion optical glass for mold as claimed in claim 9 is characterized in that, its weight percent consists of:
SiO
2: 2-8%, B
2O
3: 8-20%, La
2O
3: 25-40%, Gd
2O
3: 5-18%, ZnO:12-19%, ZrO
2: 0-8%, Ta
2O
5: greater than 8-18%, Li
2O+Na
2O+K
2O:0-5%, Li
2O: be no more than 0.5%, WO
3: 0-1 0%, Sb
2O
3: be no more than 0.1%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
12. high-refraction low-dispersion optical glass for mold pressing as claimed in claim 9 is characterized in that, its weight percent consists of:
SiO
2: 2-8%, B
2O
3: 8-20%, La
2O
3: 25-40%, Gd
2O
3: 5-18%, ZnO:12-19%, ZrO
2: 0-8%, Ta
2O
5: 10-18%, Li
2O:0.05-0.4%, WO
3: 0-10%, Sb
2O
3: be no more than 0.05%, Nb
2O
5: 0-2%, TiO
2: 0-0.5%.
13. high-refraction low-dispersion optical glass for mold pressing as claimed in claim 9 is characterized in that, the transmittance of described opticglass reaches the wavelength of 70% o'clock correspondence below 385nm, and glass transformation temperature is below 620 ℃.
14. high-refraction low-dispersion optical glass for mold pressing as claimed in claim 13 is characterized in that, the acid resistance test result that described opticglass carries out based on the testing method of standard GB/T17129 is 1 grade to 2 grades, expansion coefficient of glass thread 80 * 10
-7Below/the K.
15. compression molding glass preform material is characterized in that, comprises the arbitrary described high-refraction low-dispersion optical glass for mold pressing of claim 1-4,9-12.
16. optical element is characterized in that, comprises claim 1-4,9 12 arbitrary described high-refraction low-dispersion optical glass for mold pressing.
17. optical element is characterized in that, by the described compression molding of claim 15 is obtained with the compression molding of glass preform material.
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| CN102424523A (en) * | 2011-09-08 | 2012-04-25 | 成都光明光电股份有限公司 | Optical glass, prefabricated member for mould pressing and optical element |
| CN106698926A (en) * | 2016-09-30 | 2017-05-24 | 成都光明光电股份有限公司 | Optical glass, glass prefabricated part, optical element and optical instrument |
| CN109081578A (en) * | 2018-09-28 | 2018-12-25 | 成都光明光电股份有限公司 | Optical glass, its prefabricated component, optical element and optical instrument |
| CN110407458A (en) * | 2018-04-26 | 2019-11-05 | Hoya株式会社 | Optical glass and optical element |
| CN112028473A (en) * | 2020-09-07 | 2020-12-04 | 成都光明光电股份有限公司 | Optical glass for precision mould pressing |
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| CN101423328A (en) * | 2007-10-30 | 2009-05-06 | 日本电气硝子株式会社 | Optical glass for pressure forming |
| CN101386469B (en) * | 2008-10-16 | 2011-05-11 | 成都光明光电股份有限公司 | High refraction and low dispersion optical glass |
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| CN109081578B (en) * | 2018-09-28 | 2020-02-07 | 成都光明光电股份有限公司 | Optical glass, preform thereof, optical element and optical instrument |
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| CN112028473A (en) * | 2020-09-07 | 2020-12-04 | 成都光明光电股份有限公司 | Optical glass for precision mould pressing |
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