CN110204194B - Optical glass and glass prefabricated member, element and instrument thereof - Google Patents

Optical glass and glass prefabricated member, element and instrument thereof Download PDF

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CN110204194B
CN110204194B CN201910576860.2A CN201910576860A CN110204194B CN 110204194 B CN110204194 B CN 110204194B CN 201910576860 A CN201910576860 A CN 201910576860A CN 110204194 B CN110204194 B CN 110204194B
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optical glass
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孙伟
匡波
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CDGM Glass Co Ltd
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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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements

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Abstract

The invention discloses an optical glass and a glass prefabricated member, an element and an instrument thereof, which comprises the following components in percentage by weight: SiO 22 40～60％；B2O3 1～15％；Rn2O 0～15％；RO 15～35％；ZnO 0～15％；Rn2O is selected from Na2O、K2O、Li2One or more of O, RO is selected from one or more of CaO, BaO, SrO and MgO; wherein, B2O3/SiO2Has a value of 0.14 or less, B2O3The value of/RO is 0.01 to 0.42. By mutual optimization of the composition and the proportion of chemical elements, the invention can also obtain higher weather resistance, high transmittance, better chemical stability, higher Knoop hardness and lower refractive index temperature coefficient on the premise of achieving the required refractive index and dispersion.

Description

Optical glass and glass prefabricated member, element and instrument thereof
Technical Field
The invention relates to the field of glass, in particular to optical glass, a glass prefabricated member, an element and an instrument thereof.
Background
From the optical properties, glasses with a refractive index of 1.54 to 1.62 and an Abbe number of 50 to 65, which are generally conventional crown glasses, are generally composed of SiO2-B2O3-RO-Rn2O component system, wherein RO means an alkaline earth metal oxide, Rn2O means an alkali metal oxide.
A comparison document CN1450010A (2002) discloses an optical glass based on silicic acid, the SiO of which2The content of (b) is 36 to 66 mol%, and it can be found by conversion of examples of this comparative document: SiO in this document239.41-48.32 wt%, and the glass has excellent environment test resistance, high transmittance, high expansion coefficient and Young's modulus, but relatively high transition temperature (Tg).
The glass with low transition temperature (Tg) can reduce the temperature during the die pressing, reduce the surface oxidation of the die, prolong the service life of the die and further reduce the manufacturing cost. Thus, patent CN101445322A (2008) discloses a P-free article2O5The dense crown optical glass avoids the corrosion of elements to a mold, has low transition temperature (Tg) and is suitable for precise pressure forming. The glass is mainly 20-50 wt% SiO2As the main component, by B2O3、ZnO、Li2O、Na2O and K2The content of O is adjusted to achieve the effect of lowering the transition temperature (Tg).
Although patent document CN101445322A (2008) discloses that the transition temperature can be lowered, the weather resistance is not significant, and thus CN 108975687 a is added with SiO2The content of (A) further achieves the effect of improving weather resistance, but in the case of improving SiO2The content of the glass powder is effective in improving weather resistance and also causes a problem of lowering melting property and refractive index. Thus, in the comparison document CN 108975687A, the inventors added Na2The contents of O, ZnO and CaO are reduced, and Li is reduced2O, BaO to improve the melting and refractive index.
However, in CN 108975687A, it is actually passed through SiO2The content increasing mode enables the weather resistance and the chemical resistance of the optical glass to be improved to a certain extent, but the improving effect is not obvious, and the chemical resistance and the Knoop hardness of the optical glass can not meet the requirements.
Meanwhile, the thermal phase difference caused by the fact that the refractive index of the existing optical glass is greatly changed along with the temperature in the application process has a large influence on the precision and accuracy of instruments operated in a high-temperature environment, particularly in an outdoor high-temperature environment, and the development of the optical crown glass suitable for the outdoor high-temperature environment is necessary.
Disclosure of Invention
The invention aims to provide optical glass with a new proportion, which can obtain higher weather resistance, high transmittance, better chemical stability, higher Knoop hardness and lower refractive index temperature coefficient on the premise of achieving the required refractive index and dispersion through mutual optimization of composition and proportion among chemical elements.
The invention is realized by the following technical scheme:
an optical glass comprising, in wt%:
Figure BDA0002112334130000021
Rn2o is selected from Na2O、K2O、Li2One or more of O, RO is selected from one or more of CaO, BaO, SrO and MgO;
wherein, B2O3/SiO2Has a value of 0.14 or less, B2O3The value of/RO is 0.01 to 0.42.
Further, the
Figure BDA0002112334130000022
Further, the
Figure BDA0002112334130000023
Further, in the present invention,
Rn2o is 0 to 10% of Na2O and/or 0 to 10% of K2O, preferably, Rn2O is 1-10% of Na2O and/or 1-10% of K2O, more preferably, Rn2O is 1-5% of Na2O and/or 5 to 10% of K2O; and/or
RO is 0-15% CaO and/or 15-35% BaO, preferably RO is 0-5% CaO and/or 20-35% BaO, and more preferably RO is 25-35% BaO.
Further, in the present invention,
RO/(B2O3+SiO2) Has a value of 0.41 to 0.74, preferably RO/(B)2O3+SiO2) The value of (A) is 0.46 to 0.52; and/or
ZnO/(B2O3+SiO2) Has a value of 0.06 to 0.37, preferably, ZnO/(B)2O3+SiO2) The value of (A) is 0.13 to 0.31; and/or
B2O3/SiO2Has a value of 0.04 to 0.14, preferably, B2O3/SiO2Has a value of0.04～0.1；
B2O3The value of/RO is 0.06-0.38, preferably, B2O3The value of/RO is 0.14 to 0.35.
Further, the invention also contains 0-5% of TiO20 to 10% of Al2O30 to 2% of Sb2O3。
Further, TiO20 to 2%, preferably none; and/or
Al2O30 to 5%, preferably none; and/or
Sb2O30 to 1%, preferably none.
Furthermore, the refractive index nd of the glass is 1.50-1.60, preferably 1.53-1.60; abbe number vd50 to 60, preferably 54 to 62; the temperature coefficient of refractive index of the optical glass is 3.5 multiplied by 10-6Lower than DEG C, preferably 3.0X 10-6Below degree centigrade.
The glass of the invention has a stability RC against humid atmospheric effects of more than 2 types, preferably more than 1 type; stability against acid action DAIs 3 or more, preferably 2 or more; stability to Water action DWIs 2 or more, preferably 1 or more.
Further, lambda of the glasses of the invention80370nm or less, preferably 360nm or less; lambda of glass5Is 340nm or less, preferably 320nm or less. Furthermore, the glass of the invention has a transition temperature of 620 ℃ or lower, preferably 610 ℃ or lower; the density of the glass is 3.6g/cm3Hereinafter, it is preferably 3.4g/cm3The following.
The invention also discloses a glass prefabricated member, an optical element and an optical instrument, wherein the glass prefabricated member is made of the optical glass. The optical element is made of the optical glass or the glass prefabricated member. An optical instrument is manufactured by adopting the optical element.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. by mutual optimization of the composition and the proportion of chemical elements, on the premise of achieving the required refractive index and dispersion, the high-performance high-transmittance high-performance high-transmittance high-chemical-resistance high-hardness Knoop material can be obtained;
2. the temperature coefficient of the refractive index of the invention is 3.5 multiplied by 10-6Below/degree centigrade, it is more suitable for outdoor high temperature use.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention. In the present specification, the contents of the respective components (ingredients) are all expressed in terms of weight percentage with respect to the total amount of glass matter converted into the composition of oxides, if not specifically stated. Here, the "composition converted to oxides" means that when raw materials as the constituent components of the optical glass of the present invention are decomposed and converted to oxides when they are melted, the total amount of the oxides is 100%.
Unless otherwise indicated in a specific context, numerical ranges set forth herein include upper and lower values, and "above" and "below" include endpoints, all integers and fractions within the range, and are not limited to the specific values listed in the defined range. As used herein, "and/or" is inclusive, e.g., "A and/or B," and means A alone, B alone, or both A and B.
[ essential Components and optional Components ]
In the present invention, SiO2The glass is a network former of glass, which is a main component of the glass, and in the glass system of the present invention, when the content is more than 60%, the melting point of the glass is increased, the melting of the glass becomes difficult, the high-temperature viscosity is increased, and the refractive index of the glass is decreased; when the content is less than 40%, the chemical stability of the glass may be deteriorated and the weather resistance may be lowered. Thus, the SiO of the invention2The content of (B) is limited to 40 to 60%, preferably 45 to 58%, more preferably 45 to 54%.
B2O3Is also one of the components constituting the glass skeleton, and can increase the glass refractive index, reduce the dispersion and improve the glass gloss, and at the same time, the B2O3The glass melting aid is a good cosolvent, and the addition of a proper amount can obviously improve the solubility of glass raw materials, so that the raw materials are easier to melt, and the glass stability is better. And, B2O3Different structures are formed at different contents of (A) and have a great influence on the weather resistance of the glass. In order to be able to achieve both good weathering resistance and low high-temperature viscosity in the systems according to the invention, B2O3The content of (B) is limited to 1 to 15%, preferably 2 to 10%, more preferably 2 to 8%.
When B is present2O3/SiO2If the value of (A) is too high or too low, the glass will have poor melting property and weather resistance, and the high-temperature viscosity of the glass will be increased, which is disadvantageous for glass molding. In the system of the invention, SiO is used2Increase of content and restriction of B2O3/SiO2The ratio of (A) to (B) can provide the premise of obtaining lower high-temperature viscosity and meeting the requirements of refractive index and dispersion and reduce the temperature coefficient of the refractive index of the glass under the condition of improving the weather resistance, and in the system of the invention, B2O3/SiO2The value of (A) is 0.14 or less, preferably 0.04 to 0.14, more preferably 0.04 to 0.1.
Rn2O is an alkali metal oxide including Na2O、K2O、Li2O and the like, and the proper amount of the additive can reduce the transition temperature of the glass, improve the meltability and weather resistance of the glass and reduce the high-temperature viscosity and the crystallization tendency; wherein Na2The content of O is too low, and the high-temperature viscosity of the glass can not reach the design target; if too high, the weatherability of the glass will be significantly reduced. K2O is largely destructive to the weatherability of the glass, so that its content cannot be too high, which affects the weatherability. Li2The capability of O to damage the glass network is strongest, the capability of reducing the high-temperature viscosity of the glass is most obvious, and if the content is too low, the effect of reducing the high-temperature viscosity is not obvious; if the content is too high, the devitrification resistance of the glass is lowered. Thus, Rn in the present invention2The content of O is limited to 0 to 15%, preferably 2 to 12%More preferably 5 to 12%. In some embodiments, Rn2O is selected from Na2O、K2O、Li2One or more of O; preferably 0 to 10% of Na2O and/or 0 to 10% of K2O; more preferably, Rn2O is 1-10% of Na2O and/or 1-10% of K2O; most preferably, Rn2O is 1-5% of Na2O and/or 5 to 10% of K2O。
RO is alkaline earth metal oxide, including CaO, BaO, MgO, etc., and proper amount of RO is added into glass to regulate the refractivity and dispersion of glass and balance the components of glass, so that the glass is stable and has raised weather resistance, devitrification resistance and chemical stability. In the system of the present invention, the content of RO is limited to 5 to 35%, preferably 20 to 35%, and more preferably 25 to 35%. In some embodiments, RO is selected from one or more of CaO, BaO, SrO, MgO; RO is 0-15% of CaO and/or 15-35% of BaO, and more preferably RO is 0-5% of CaO and/or 20-35% of BaO; most preferably, RO is 25-35% BaO.
In some embodiments, by controlling RO/(B)2O3+SiO2) The value of (A) is limited to 0.41-0.74, the meltability of the glass can be further improved, the proper high-temperature viscosity can be obtained, the forming and processing production are easy, and RO/(B) is preferred in some embodiments2O3+SiO2) The value of (A) is 0.46 to 0.52, and the transition temperature (Tg) of the optical glass can be further reduced.
Meanwhile, in order to ensure that the refractive index and the dispersion of the invention meet the requirements, reduce the transition temperature, improve the weather resistance of the glass, reduce the melting point of the glass, lower the melting temperature of the glass, reduce the production difficulty and the energy consumption, and reduce the coloring of the glass, the invention80And into5To reach the target value, B is added to the system of the invention2O3The value of/RO is limited to 0.01-0.42, preferably 0.06-0.38, more preferably 0.14-0.35, the glass can simultaneously satisfy the excellent performance, the temperature coefficient of refractive index of the glass is further reduced, and the glass is more suitable for outdoor high-temperature environment.
The glass is added with a proper amount of ZnO, so that the transition temperature can be obviously reduced, and the anti-crystallization performance of the glass is improved. . However, if the amount of ZnO added is too large, the devitrification resistance of the glass is lowered, and other properties cannot be satisfied at the same time, and if it is too small, a good transition temperature cannot be obtained. In the glass system of the present invention, the content of ZnO is limited to 0 to 15%, preferably 5 to 15%, and more preferably 8 to 15%.
In the system of the invention, ZnO and B are reacted2O3+SiO2The ratio of the components is optimized, the requirements of refractive index and dispersion can be effectively met, simultaneously, the weather resistance and chemical stability of the glass are further improved, the high-temperature viscosity is reduced, and the hardness of the glass is improved2O3+SiO2) The value of (A) is set to 0.06 to 0.37, preferably ZnO/(B)2O3+SiO2) The value of (A) is 0.13 to 0.31.
TiO2The glass belongs to high-refraction oxide, and the addition of the oxide into the glass can obviously improve the refractive index and dispersion of the glass and can also improve the weather resistance of the glass. However, if TiO2 is added to the glass excessively, the glass is liable to be colored80And into5。TiO2The amount of (B) is limited to 0 to 5%, preferably 0 to 2%, and more preferably not contained.
Al2O3The introduction of (2) can reduce devitrification property of the glass and improve thermal stability and chemical stability, but too much addition thereof brings difficulty in melting the glass and a risk of lowering devitrification property, and also increases the specific gravity of the glass to be disadvantageous for weight reduction of the product, so that in the glass system, Al is contained2O3The amount of (B) is limited to 0 to 10%, preferably 0 to 5%, and more preferably not contained.
Sb2O3After the glass is added, bubbles can be eliminated more easily, and the refractive index and the dispersion of the glass are improved better. Sb2O3The amount of addition is limited to 0 to 2%, preferably 0 to 1%, and more preferably none.
In the present invention, "not including", "not containing", "not introducing" and "0%" mean that the compound, molecule, element or the like is not intentionally added to the glass of the present invention as a raw material; however, it is also within the scope of the present invention that certain impurities or components, which are not intentionally added, may be present as raw materials and/or equipment for producing the glass, and may be present in small or trace amounts in the final glass.
The performance and the test method of the fluorophosphate glass of the present invention will be described below.
1. Degree of coloration (. lamda.)80/λ5)
Coloring degree (. lamda.) for short-wave transmission spectral characteristics of the glass of the present invention80/λ5) And (4) showing. Lambda [ alpha ]80Refers to the wavelength, lambda, corresponding to a glass having a transmittance of 80%5Refers to the wavelength corresponding to the glass transmittance of 5%, wherein80Was measured using a glass having a thickness of 10. + -. 0.1mm with two opposing planes parallel to each other and optically polished, measuring the spectral transmittance in the wavelength region from 280nm to 700nm and showing a wavelength of transmittance of 80%. The spectral transmittance or transmittance is the intensity I of light incident perpendicularly to the surface of the glassinLight transmitted through the glass and having an intensity I emitted from a planeoutIn the case of light of (1) through (I)out/IinThe quantity expressed and also the transmission of the surface reflection losses on the above-mentioned surface of the glass. The higher the refractive index of the glass, the greater the surface reflection loss.
The spectral transmittance was measured using a glass sample having a thickness of 10. + -. 0.1mm with two optically polished planes opposed to each other, and calculated from the result thereof.
In the optical glass of the present invention, λ80A small value of (b) means that the glass itself is less colored. The optical glass of the present invention has a wavelength (lambda) corresponding to 80% transmittance80) Is not more than 370nm, preferably not more than 360 nm; wavelength (lambda) corresponding to a glass transmittance of 5%5) Not more than 340nm, preferably not more than 320 nm.
2. Transition temperature Tg
Temperature change deviceDegree TgMeans that the temperature of the glass sample is raised from room temperature to the sag temperature TsAnd the temperature corresponding to the intersection point where the extensions of the straight portions of the low temperature region and the high temperature region intersect. Transition temperature TgThe measurement was carried out according to the method specified in GB/T7962.16-2010.
The glass transition temperature is 620 ℃ or lower, preferably 610 ℃ or lower.
3. Refractive index and Abbe number
The refractive index and Abbe number were measured according to the method specified in GB/T7962.1-2010.
The refractive index nd of the glass is 1.50-1.60, preferably 1.53-1.60; abbe number vd50 to 60, preferably 54 to 62.
4. Chemical stability (D)W、DA、RC)
The ability of a polished surface of an optical glass element to resist the action of various corrosive media such as water, acid and the like during the manufacturing and use thereof is called the chemical stability of the optical glass, and it mainly depends on the chemical composition of the glass. Testing the stability to Water action according to GB/T17129 test method DwStability against acid action DA(ii) a The resistance to humid atmospheric effects, RC, was tested according to the test method of GB/T7962.15-2010.
The glass of the invention has a stability RC against humid atmospheric effects of more than 2 types, preferably more than 1 type; stability against acid action DAIs 3 or more, preferably 2 or more; the water resistance stability Dw is 2 or more, preferably 1 or more.
5. Weather resistance
The sample is placed in a test box in a saturated water vapor environment with the relative humidity of 90 percent, and is alternately circulated at 40-50 ℃ every 1h for 15 periods. The weather resistance is classified according to the amount of change in turbidity before and after the sample is left, wherein turbidity means that a deteriorated layer such as "white spot" or "haze" is formed on the surface of the colorless optical glass after the colorless optical glass is corroded by the atmosphere. The degree of erosion of the glass surface was determined by measuring the difference in turbidity before and after the erosion of the sample. The turbidity measurements were performed using an integrating sphere turbidimeter with haze indications within ± 5% of relative error. Table 1 below is a weather resistance classification:
TABLE 1
Figure BDA0002112334130000071
The glass of the present invention has a weatherability not less than grade 2, preferably not less than grade 1.
6. Temperature coefficient of refractive index
And testing the temperature coefficient of the refractive index according to a method specified in GB/T7962.4-2010, and determining the temperature coefficient of the refractive index at-40-80 ℃.
The temperature coefficient of refractive index of the glass of the invention is 3.5 x 10-6Lower than DEG C, preferably 3.0X 10-6Below degree centigrade.
7. Knoop hardness Hk
The Knoop hardness Hk was tested according to the method specified in GB/T7962.18-2010.
The Knoop hardness Hk of the invention is 510X 107Pa or more, preferably 520X 107Pa or above.
Examples
An optical glass having the composition and properties shown in tables 2 to 4 in terms of wt%.
TABLE 2
Figure BDA0002112334130000072
Figure BDA0002112334130000081
TABLE 3
Figure BDA0002112334130000082
Figure BDA0002112334130000091
TABLE 4
Figure BDA0002112334130000092
Figure BDA0002112334130000101
The optical element formed by the optical glass can be used for manufacturing optical instruments such as photographic equipment, camera equipment, display equipment, monitoring equipment and the like. By using the optical element having excellent performance in the optical instrument, the customer experience of the optical instrument can be improved. It should be noted that the features and advantages described above for the optical element apply equally to the optical instrument and are not described in detail here.

Claims (22)

1. An optical glass, characterized by comprising, in wt%:
SiO2 40～60%；
B2O3 1～15%；
Rn2O 0～15%；
RO 15～35%；
ZnO 0～15%；
Rn2o is selected from Na2O、K2O、Li2One or two of O, RO is selected from one or more of CaO, BaO, SrO and MgO;
wherein, B2O3/ SiO2Has a value of 0.04 to 0.1, B2O3The value of/RO is 0.01-0.35;
the temperature coefficient of refractive index of the optical glass is 2.7 multiplied by 10 under the condition of 60-80 DEG C-6Below degree centigrade.
2. An optical glass as defined in claim 1, wherein said glass is characterized in that, in wt.%
SiO245-58%; and/or
B2O32-10%; and/or
Rn2O2-12%; and/or
20-35% of RO; and/or
ZnO 5～15%。
3. An optical glass as defined in claim 1, wherein said glass is characterized in that, in wt.%
SiO253-60%; and/or
B2O32-8%; and/or
Rn25-12% of O; and/or
RO 25-35%; and/or
ZnO 8～15%。
4. An optical glass according to claim 1,
Rn2o is 0 to 10% of Na2O and/or 0 to 10% of K2O; and/or
RO is 0-15% CaO and/or 15-35% BaO.
5. An optical glass according to claim 4,
Rn2o is 1-10% of Na2O and/or 1-10% of K2O, and/or
RO is 0-5% CaO and/or 20-35% BaO.
6. An optical glass according to claim 5,
Rn2o is 1-5% of Na2O and/or 5 to 10% of K2O; and/or
RO is 25-35% BaO.
7. An optical glass according to claim 1,
RO/（B2O3+SiO2) The value of (A) is 0.41 to 0.74; and/or
ZnO/（B2O3+SiO2) The value of (A) is 0.06 to 0.37; and/or
B2O3The value of/RO is 0.06-0.35.
8. An optical glass according to claim 7,
RO/（B2O3+SiO2) The value of (A) is 0.46 to 0.52; and/or
ZnO/（B2O3+SiO2) The value of (A) is 0.13 to 0.31; and/or
B2O3The value of/RO is 0.14 to 0.35.
9. An optical glass according to claim 1, further comprising 0 to 5% by weight of TiO20 to 10% of Al2O30 to 2% of Sb2O3。
10. An optical glass according to claim 9, characterised in that the glass, in wt.%,
TiO20 to 2 percent; and/or
Al2O30 to 5 percent; and/or
Sb2O30 to 1%.
11. An optical glass according to claim 10,
not containing TiO2(ii) a And/or
Does not contain Al2O3(ii) a And/or
Do not contain Sb2O3。
12. An optical glass according to any one of claims 1 to 11, wherein the glass has a refractive index nd of 1.50 to 1.60; abbe number vdIs 50 to 60.
13. An optical glass as defined in claim 12, which is characterized in thatCharacterized in that the refractive index nd of the glass is 1.53 to 1.60; abbe number vdIs 54 to 60.
14. An optical glass according to any one of claims 1 to 11, wherein the glass has a stability to humid atmospheric effects RC of class 2 or more; stability against acid action DAIs more than 3 types; stability to Water action DWIs more than 2 types.
15. An optical glass according to claim 14, wherein the glass has a stability to humid atmospheric effects RC of class 1 or more; stability against acid action DAIs more than 2 types; stability to Water action DWIs more than 1 type.
16. An optical glass according to any one of claims 1 to 11, wherein the glass has a lambda80Is below 370 nm; lambda of glass5Is 340nm or less.
17. An optical glass as claimed in claim 16, characterized in that the lambda of the glass80Is less than 360 nm; lambda of glass5Is 320nm or less.
18. An optical glass according to any one of claims 1 to 11, wherein the glass has a transition temperature of 620 ℃ or lower; the density of the glass is 3.6g/cm3The following.
19. An optical glass according to claim 18, wherein the glass has a transition temperature of 610 ℃ or lower; the density of the glass is 3.4g/cm3The following.
20. A glass preform made of the optical glass according to any one of claims 1 to 19.
21. An optical element produced from the optical glass according to any one of claims 1 to 19 or the glass preform according to claim 20.
22. An optical device fabricated using the optical element of claim 21.
CN201910576860.2A 2019-06-28 2019-06-28 Optical glass and glass prefabricated member, element and instrument thereof Active CN110204194B (en)

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WO2002072492A1 (en) * 2001-03-08 2002-09-19 Nippon Electric Glass Co., Ltd. Mantle tube for fluorescent lamp
JP2004026510A (en) * 2001-06-12 2004-01-29 Nippon Electric Glass Co Ltd Substrate glass for multilayered film filter and multilayered film filter
CN1450010A (en) * 2002-04-09 2003-10-22 碧悠国际光电股份有限公司 Optical glass
JP2004075456A (en) * 2002-08-19 2004-03-11 Nippon Electric Glass Co Ltd Optical glass for mold press molding
JP2004256389A (en) * 2003-02-25 2004-09-16 Carl-Zeiss-Stiftung Aluminosilicate glass
JP2004292306A (en) * 2003-03-12 2004-10-21 Nippon Electric Glass Co Ltd Optical glass for mold press molding
JP2005200296A (en) * 2003-12-18 2005-07-28 Nippon Electric Glass Co Ltd Glass for mold press forming
JP2008266140A (en) * 2005-04-28 2008-11-06 Ohara Inc Optical glass
JP2009073674A (en) * 2006-09-04 2009-04-09 Nippon Electric Glass Co Ltd Method for producing glass
JP2010024101A (en) * 2008-07-18 2010-02-04 Ohara Inc Optical glass, glass molded product and optical device
CN101445322A (en) * 2008-12-30 2009-06-03 成都光明光电股份有限公司 Dense crown optical glass
CN108975687A (en) * 2015-06-24 2018-12-11 成都光明光电股份有限公司 Optical glass

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