WO2010147072A1 - モールドプレス成形用光学ガラス - Google Patents
モールドプレス成形用光学ガラス Download PDFInfo
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- WO2010147072A1 WO2010147072A1 PCT/JP2010/060018 JP2010060018W WO2010147072A1 WO 2010147072 A1 WO2010147072 A1 WO 2010147072A1 JP 2010060018 W JP2010060018 W JP 2010060018W WO 2010147072 A1 WO2010147072 A1 WO 2010147072A1
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- WO
- WIPO (PCT)
- Prior art keywords
- glass
- mold press
- press molding
- refractive index
- optical glass
- Prior art date
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Classifications
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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
- C03C4/00—Compositions for glass with special properties
- C03C4/02—Compositions for glass with special properties for coloured glass
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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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/14—Silica-free oxide glass compositions containing boron
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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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/14—Silica-free oxide glass compositions containing boron
- C03C3/15—Silica-free oxide glass compositions containing boron containing rare earths
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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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/14—Silica-free oxide glass compositions containing boron
- C03C3/15—Silica-free oxide glass compositions containing boron containing rare earths
- C03C3/155—Silica-free oxide glass compositions containing boron containing rare earths containing zirconium, titanium, tantalum or niobium
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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
- C03C3/12—Silica-free oxide glass compositions
- C03C3/253—Silica-free oxide glass compositions containing germanium
Definitions
- the present invention relates to an optical glass for mold press molding. More specifically, the present invention relates to an optical glass for mold press molding that has a high refractive index and high dispersion and is suitable for an optical pickup lens of various optical disk systems, a video camera, a photographing lens of a general camera, and the like.
- optical pickup lens video camera, and general camera photographing lens of CD, MD, DVD, and other various optical disc systems are generally manufactured as follows.
- molten glass is dropped from the tip of the nozzle to produce droplet glass (droplet molding), and if necessary, grinding, polishing, and washing are performed to produce a preform glass.
- droplet molding droplet molding
- a molten glass is rapidly cast to produce a glass ingot, which is then ground, polished and washed to produce a preform glass.
- the preform glass is heated and softened, and pressure-molded with a precision-processed mold, and the surface shape of the mold is transferred to the glass to produce a lens.
- a molding method is generally called a mold press molding method.
- a glass having a glass transition point Tg as low as possible is required to precisely mold press mold the lens while suppressing deterioration of the mold.
- Tg glass transition point
- the present invention is (1) does not contain environmentally undesirable components, (2) easily achieves a low glass transition point, (3) has a high refractive index and high dispersion, and (4) has a visible light transmittance. It is an object of the present invention to provide an optical glass for mold press molding capable of satisfying all the demands that excellent glass is easily obtained and (5) excellent devitrification resistance at the time of preform molding.
- the refractive index nd is 1.925 or more
- the Abbe number ⁇ d is 10 to 30
- the mass% is Bi 2 O 3 20 to 90%
- B 2 O 3 10 to 30% GeO 2 0.
- the present invention relates to an optical glass for molding press molding characterized by containing a glass composition of ⁇ 5.5% and substantially free of lead component, arsenic component and F component.
- the optical glass for mold press molding of the present invention has high refractive index and high dispersion optical characteristics. Furthermore, when the refractive index is the same as that of a conventional glass, a glass having a higher transmittance can be produced. For this reason, it is possible to reduce the thickness of the lens and reduce the number of lenses, and it is possible to manufacture a higher definition optical device. This makes it possible to reduce the component cost and improve the performance.
- the mold for press molding an optical glass of the present invention which contains the Bi 2 O 3 in a large amount in the composition, it is easy to achieve a low glass transition point. Therefore, mold press molding is possible at a low temperature, and deterioration of the mold due to the volatiles of the glass component can be suppressed.
- the optical glass for mold press molding of the present invention has a feature that a devitrified substance that inhibits transparency is hardly generated during preform molding. Furthermore, since it does not substantially contain lead components, arsenic components, and F components, which are harmful components, it is an environmentally preferable glass.
- does not contain lead component, arsenic component, F component means that these components are not intentionally added to the glass, and means that unavoidable impurities are completely eliminated. is not. Objectively, it means that the content of these components including impurities is less than 0.1% by mass.
- the optical glass for mold press molding of the present invention is preferably mass% and Bi 2 O 3 + B 2 O 3 is preferably 60 to 100%.
- the optical glass for mold press molding of the present invention preferably contains 0 to 10% of ZnO by mass%.
- the optical glass for mold press molding of the present invention preferably contains 0 to less than 3% of SiO 2 by mass%.
- the optical glass for mold press molding according to the present invention is preferably mass%, and La 2 O 3 + Gd 2 O 3 + Ta 2 O 5 is preferably 7.5 to 30%.
- “La 2 O 3 + Gd 2 O 3 + Ta 2 O 5 ” indicates the total amount of these components.
- the optical glass for mold press molding of the present invention preferably has a Bi 2 O 3 / B 2 O 3 ratio of 5 or less in terms of mass ratio.
- Bi 2 O 3 / B 2 O 3 indicates the ratio of the contents of these components.
- the optical glass for mold press molding of the present invention preferably contains 0.1 to 15% of TiO 2 by mass.
- Bi 2 O 3 + B 2 O 3 is preferably 99% or more.
- Bi 2 O 3 + B 2 O 3 + TiO 2 is preferably 99% or more.
- the optical glass for mold press molding of the present invention preferably has a glass coloring degree ⁇ 70 of 500 nm or less.
- coloring degree ⁇ 70 refers to a wavelength at which the transmittance is 70%.
- the glass coloring degree ⁇ 70 satisfies the above range, it has excellent transmittance in the visible region or near-ultraviolet region, and is suitable for various optical lenses.
- Bi 2 O 3 is an essential component that realizes high refraction and high dispersion, low Tg (glass transition point), improved chemical durability, and the like, and is also effective as a devitrification suppressing component of glass.
- the content of Bi 2 O 3 is preferably 20 to 90%, 20 to 85%, 20 to 83%, 25 to 80%, particularly preferably 30 to 75%.
- the content of Bi 2 O 3 is less than 20%, the glass becomes unstable and the devitrification resistance is deteriorated, and it is difficult to achieve desired optical characteristics and low Tg.
- Bi 2 O 3 has high volatility, if its content exceeds 90%, the mold is likely to deteriorate during mold press molding, and the glass is likely to be fused to the mold. Sex is reduced. Moreover, the transmittance tends to decrease.
- B 2 O 3 is a component constituting the skeleton of the glass. Moreover, it is a component which raises the transmittance
- the content of B 2 O 3 is preferably 10 to 30%, 12 to 28%, 14 to 27%, particularly preferably 17 to 27%. When the content of B 2 O 3 is less than 10%, it is difficult to obtain a glass with high transmittance.
- B 2 O 3 is a component that tends to increase the Abbe number, if its content exceeds 30%, it is difficult to obtain a highly dispersed glass, and it becomes difficult to obtain a glass having a high refractive index.
- the total amount of Bi 2 O 3 and B 2 O 3 is preferably 60 to 100%, 70 to 100%, and particularly preferably 80 to 99.99%. It should be noted that by increasing the total amount of Bi 2 O 3 and B 2 O 3 to 99% or more, particularly 99.9% or more, it is possible to obtain a glass particularly excellent in high refractive index and high dispersion characteristics. It becomes possible.
- the ratio of Bi 2 O 3 / B 2 O 3 is preferably 5 or less, 4.5 or less, particularly 4 or less. If the ratio of these components is 5 or more, it becomes difficult to maintain a glass having an excellent coloring degree.
- GeO 2 is a component for obtaining the optical characteristics of a high refractive index and high dispersion. However, if added in a large amount, the transmittance tends to decrease. Further, since GeO 2 is an expensive raw material, the glass cost increases when used in a large amount. Therefore, the content of GeO 2 is preferably 0 to 5.5%, 0 to 5%, 0 to 4.5%, particularly preferably 0.1 to 4.5%.
- the optical glass for mold press molding of the present invention can contain the following components in addition to the above components.
- ZnO is a component that can lower the glass viscosity without lowering the refractive index. Therefore, the glass transition point can be lowered, and glass that is difficult to fuse with the mold can be obtained. Furthermore, there is an effect of improving weather resistance. In addition, since the tendency to devitrification is not strong as compared with alkaline earth metal components (MgO, CaO, SrO, BaO), a homogeneous glass can be obtained even if contained in a large amount, and the component is difficult to be colored.
- the content of ZnO is preferably 0 to 10%, 0 to 8%, particularly preferably 0.1 to 5%. If the ZnO content exceeds 10%, the weather resistance tends to deteriorate. Moreover, it becomes difficult to obtain highly dispersed glass or highly refracted glass.
- ZrO 2 is a component that increases the refractive index and increases the Abbe number.
- a glass skeleton is formed as an intermediate oxide, devitrification resistance (suppression of devitrification materials formed of B 2 O 3 and La 2 O 3 ) is improved, and chemical durability is improved. There is also an effect.
- the content of ZrO 2 is preferably 0 to 10%, 0 to 7.5%, particularly preferably 0.1 to 5%.
- La 2 O 3 is a component that can increase the refractive index while suppressing a decrease in the transmittance of the glass, but it is better not to contain it in large amounts because devitrified substances are likely to precipitate.
- the content of La 2 O 3 is preferably 0 to 20%, preferably 0.1 to 10%. When the content of La 2 O 3 exceeds 20%, devitrification resistance is deteriorated and at the same time, a highly dispersed glass is hardly obtained.
- Gd 2 O 3 is a component that can increase the refractive index while suppressing a decrease in the transmittance of the glass.
- the content of Gd 2 O 3 is preferably 0 to 20%, 0 to 10%, particularly preferably 0.1 to 10%. When the content of Gd 2 O 3 exceeds 20%, devitrification resistance deteriorates and at the same time, a highly dispersed glass is hardly obtained.
- Ta 2 O 5 has the effect of increasing the refractive index and dispersion while suppressing a decrease in the transmittance of the glass.
- the content of Ta 2 O 5 is preferably 0 to 20%, 0 to 15%, particularly preferably 0.1 to 10%. If the content of Ta 2 O 5 exceeds 20%, the devitrification resistance of the glass tends to deteriorate.
- the total amount of these components is preferably 7.5 to 30%, 8 to 25%, particularly 10 to 20%. If the total amount of these components is less than 7.5%, it will be difficult to maintain a high refractive index. .
- the Bi 2 O 3 is small area, it is the case of 75% or less. In a region where there is a large amount of Bi 2 O 3 , if the total amount of La 2 O 3 + Gd 2 O 3 + Ta 2 O 5 is large, the transmittance is lowered. Therefore, the total amount is preferably 0 to 20%, 0 to 10%, particularly preferably 0 to 5%. Note that the Bi 2 O 3 is large area, which is not less than 75%.
- Nb 2 O 5 , WO 3 , and TiO 2 are components that have a large effect of increasing the refractive index, and also have an effect of increasing dispersion. Further, as compared with La 2 O 3, Gd 2 O 3, Ta 2 O 5, a large function of suppressing the devitrification resistance. However, since it is easy to reduce the transmittance, the content is preferably limited.
- the content of Nb 2 O 5 is preferably 0 to 10%, 0 to 5%, particularly preferably 0.1 to 5%.
- a devitrified material containing Nb 2 O 5 as a main component is likely to precipitate (surface devitrification) on the glass surface.
- the transmittance tends to decrease.
- WO 3 is the most effective component for improving the devitrification resistance of glass.
- the content of WO 3 is preferably 0 to 10%, 0 to 5%, particularly preferably 0.1 to 5%.
- WO 3 has a lower ratio of decreasing the transmittance than La 2 O 3 , Gd 2 O 3 , and Ta 2 O 5 , a relatively high transmittance can be maintained by actively adding WO 3.
- high refractive index and high dispersion optical characteristics are easily obtained.
- TiO 2 is particularly effective for obtaining high refractive index and high dispersion optical characteristics, and has an effect of improving weather resistance. Further, TiO 2 is effective component to improve the devitrification resistance of the glass is the most transmittance tends to lower component among these components. In particular, when a large amount of impurity Fe is contained in the glass, the transmittance is significantly reduced. Accordingly, the content of TiO 2 is preferably 0 to 15%, 0 to 10%, 0 to 5%, particularly preferably 0.1 to 5%. In order to obtain the above effect, the content of TiO 2 is preferably 0.1 to 15%. Note that when the Fe content of impurities is 20 ppm or more, a significant decrease in transmittance occurs.
- the ratio of TiO 2 / Bi 2 O 3 + TiO 2 is set to 0.048 or less, particularly 0.045. It is preferable to adjust to the following.
- the lead component (PbO), arsenic component (As 2 O 3 ) and F component (F 2 ) should be avoided in substantial glass for environmental reasons. Therefore, in the present invention, these components are not substantially contained.
- Li 2 O may contain Na 2 O, K 2 O.
- Such an alkali metal oxide (R ′ 2 O) is a component for lowering the softening point.
- Li 2 O has the greatest effect of lowering the softening point among R ′ 2 O.
- Li 2 O has a strong phase separation property, if the content is too large, the liquidus temperature rises (liquidus viscosity decreases), and devitrified substances are precipitated, which may deteriorate workability.
- the volatile matter generated at the time of mold press molding increases, or the glass is easily fused with the mold.
- Li 2 O is a component that lowers chemical durability or significantly lowers the refractive index, when it is contained in a large amount, it becomes difficult to obtain a glass having a high refractive index.
- the content is preferably 0 to 5%, 0 to 3%, particularly preferably 0.1 to 1.5%.
- Na 2 O has an effect of lowering the softening point similarly to Li 2 O.
- the content is too large, the refractive index is greatly reduced, or volatiles formed by B 2 O 3 and Na 2 O during glass melting tend to increase and promote the formation of striae. is there.
- the volatile matter generated at the time of mold press molding increases, or the glass is easily fused with the mold. Further, it is a component that greatly reduces the refractive index. Therefore, the content of Na 2 O is preferably 0 to 10%, particularly preferably 0.1 to 5%.
- K 2 O also has the effect of lowering the softening point, like Li 2 O.
- the content of K 2 O is preferably 0 to 10%, particularly preferably 0.1 to 5%.
- the optical glass for mold press molding of this invention can add various components in the range which does not impair the characteristic of the glass of this invention besides the said component.
- examples of such components include SiO 2 , Al 2 O 3 , CaO, BaO, SrO, Y 2 O 3 , Yb 2 O 3 , and a clarifying agent.
- SiO 2 is a component that can form a glass skeleton together with B 2 O 3 . Further, there is the effect of improving the weather resistance, is remarkable effect of suppressing in particular selectively eluted components such as B 2 O 3 and alkali metal oxides in the glass water.
- the content of SiO 2 is preferably 0 to 3%, particularly preferably 0.1 to 2%. If the content of SiO 2 exceeds 3%, the meltability of the glass deteriorates. For example, unmelting occurs at a low glass melting temperature of 1100 ° C. or less, and striae and bubbles remain in the glass. May not satisfy the required quality.
- Al 2 O 3 is a component capable of constituting a glass skeleton together with SiO 2 and B 2 O 3 . Further, there is the effect of improving the weather resistance, is remarkable effect of suppressing in particular selectively eluted components such as B 2 O 3 and alkali metal oxides in the glass water.
- the content of Al 2 O 3 is preferably 0 to 10%, particularly preferably 0.1 to 5%. If the content of Al 2 O 3 exceeds 10%, the glass tends to devitrify. In addition, the meltability of the glass deteriorates, and striae and bubbles remain in the glass, which may not satisfy the required quality as lens glass.
- the total amount of Bi 2 O 3, B 2 O 3, SiO 2, WO 3, TiO 2, Nb 2 O 5 is 95.5% or more, 96% or more, 97 % Or more, 98% or more, and particularly preferably 99% or more.
- Alkaline earth metal oxides such as CaO, SrO, and BaO act as a flux, and have the effect of not significantly reducing the refractive index and increasing the Abbe number.
- RO Alkaline earth metal oxides
- the total amount of CaO, SrO and BaO is preferably 0 to 20%, 0.1 to 10%, 0.1 to 5%, and particularly preferably 0.1 to 3%.
- CaO is a component that does not significantly reduce the refractive index without decreasing the Abbe number. Moreover, it is an active ingredient for improving weather resistance, and is highly effective in improving water resistance and alkali resistance. However, when the addition amount is increased, the glass is colored and the coloring degree is deteriorated.
- the CaO content is preferably 0 to 10%, particularly preferably 0.1 to 5%.
- SrO is a component that increases the refractive index. Moreover, compared with CaO, the effect which improves the water resistance and alkali resistance of glass is high. Therefore, a product excellent in weather resistance can be obtained by positively using SrO. However, when the addition amount is increased, the glass is colored and the coloring degree is deteriorated.
- the SrO content is preferably 0 to 20%, 0 to 10%, particularly preferably 0.1 to 5%.
- BaO is a component that does not greatly decrease. Moreover, compared with CaO, the raise of liquidus temperature can be suppressed and the effect which improves the water resistance and alkali resistance of glass is high. However, when the addition amount is increased, the glass is colored and the coloring degree is deteriorated.
- the BaO content is preferably 0 to 20%, particularly preferably 0.1 to 5%.
- MgO may be contained as an RO component in order to increase the refractive index.
- the MgO content is preferably 0 to 10%, particularly preferably 0.1 to 5%. When the content of MgO exceeds 10%, devitrification tends to occur.
- Y 2 O 3 and Yb 2 O 3 are components that increase the refractive index, but are components that decrease the dispersion. Moreover, there exists an effect which suppresses a phase separation. Y 2 O 3 and Yb 2 O 3 can improve devitrification resistance by substitution with La 2 O 3 .
- the contents of Y 2 O 3 and Yb 2 O 3 are preferably 0 to 10% and 0.1 to 8%, respectively. If the content of Y 2 O 3 or Yb 2 O 3 exceeds 10%, devitrification tends to occur and the working temperature range tends to be narrowed. In addition, striae are likely to occur in the glass.
- Sb 2 O 3 or SnO 2 can be added as a clarifier.
- Sb 2 O 3 is effective for refining glass that melts at a low temperature, and can suppress coloring due to Fe, which is an impurity.
- the fining agent content is preferably 0 to 1%, preferably 0.001 to 0.1%.
- the refractive index (nd) of the optical glass for mold press molding of the present invention is 1.925 or more, preferably 1.93 or more, and particularly preferably 1.95 or more.
- the Abbe number ( ⁇ d) of the optical glass for mold press molding of the present invention is 10 to 30, preferably 12 to 28, particularly preferably 15 to 26.
- the coloring degree ⁇ 70 is preferably 500 nm or less, 450 nm or less, and particularly preferably 400 nm or less.
- the coloring degree ⁇ 70 exceeds 500 nm, the transmittance in the visible region or near-ultraviolet region is inferior, making it difficult to use it in various optical lenses.
- the ratio of Bi 2 O 3 / B 2 O 3 is adjusted, or the content of a component such as Nb 2 O 5 , WO 3 , TiO 2 or the like is decreased. It is effective to limit the amount.
- the material of the melting furnace is preferably one containing no platinum as much as possible.
- solubility can be improved by using a batch material having a small particle size or once vitrified, and mixing of undissolved impurities can be suppressed.
- the optical glass for mold press molding of the present invention preferably has a glass transition point of 650 ° C. or lower, 640 ° C. or lower, particularly 630 ° C. or lower.
- a glass transition point of 650 ° C. or lower, 640 ° C. or lower, particularly 630 ° C. or lower.
- glass raw materials are prepared so as to have a desired composition and then melted in a glass melting furnace.
- it is necessary to select an optimal glass raw material so as to have a predetermined composition, to suppress mixing of impurities, or to adjust the glass melting atmosphere.
- bismuth oxide tends to oxidize other components at the time of melting, or bismuth itself is reduced to metal bismuth, resulting in a decrease in transmittance. Therefore, it is preferable to melt in an oxidizing atmosphere.
- a raw material containing a large amount of nitric acid raw material, carbonic acid raw material, hydrate and the like for example, bismuth nitrate, lanthanum nitrate, gadolinium nitrate, and barium nitrate. Further, by introducing a gas containing a large amount of oxygen into the glass at the time of melting, a melting atmosphere in a more oxidizing direction can be achieved.
- the melting temperature is preferably as low as possible.
- the melting temperature is preferably 1200 ° C. or lower, 1150 ° C. or lower, particularly 1100 ° C. or lower.
- 700 degreeC or more, especially 800 degreeC or more are preferable.
- molten glass is dropped from the tip of the nozzle to produce droplet glass to obtain a preform glass.
- a molten glass is rapidly cast and a glass block is once produced, then ground, polished and washed to obtain a preform glass.
- the preform glass is put into a precision-worked mold and is pressure-formed while being heated until it becomes softened, and the surface shape of the mold is transferred to the preform glass. In this way, an optical pickup lens and a photographing lens can be obtained.
- Tables 1 to 7 show examples (Nos. 1 to 38, 42 to 57) and comparative examples (Nos. 39 to 41) of the present invention.
- glass raw materials were prepared so as to have the respective compositions shown in the table, and melted at 800 to 1050 ° C. for 1 hour using a gold crucible. After melting, the glass melt was poured onto a carbon plate, and after annealing, a sample suitable for each measurement was produced.
- Refractive index is indicated by a measured value for d-line (587.6 nm) of a helium lamp.
- the glass transition point was evaluated by a value measured by a thermal expansion measuring device (dilatometer).
- the degree of coloration was measured using a spectrophotometer for the optically polished glass sample having a thickness of 10 mm ⁇ 0.1 mm.
- the transmittance in the wavelength range of 200 to 800 nm was measured at 0.5 nm intervals, and the transmittance was 70%. It was evaluated by the wavelength indicating.
- the weather resistance is determined by changing the condition of the surface of the glass sample after standing for 168 hours at 60 ° C. and 90% constant temperature and humidity using an optically polished glass sample having a thickness of 10 mm ⁇ 0.1 mm using a constant temperature and humidity chamber. It was observed with an optical microscope and evaluated in three stages, ⁇ , ⁇ , and ⁇ . In the evaluation, ⁇ indicates that almost no alteration has been observed, ⁇ indicates that some alteration has been observed but the level is sufficiently usable, and ⁇ indicates that alteration such as cloudiness that cannot be removed is observed on the surface. .
- the optical glass for mold press molding of the present invention has a high refractive index and high dispersion and excellent transmittance, so that it can be used for optical pickup lenses, video cameras, and general cameras for CD, MD, DVD, and other various optical disk systems. Lenses and the like can be improved. It can also be used as a glass glass material produced by a molding method other than mold press molding.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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Abstract
Description
以下、本発明を実施例に基づいて詳細に説明するが、本発明はこれらの実施例に限定されるものではない。
Claims (10)
- 屈折率ndが1.925以上、アッベ数νdが10~30であり、質量%で、Bi2O3 20~90%、B2O3 10~30%、GeO2 0~5.5%のガラス組成を含有し、かつ、鉛成分、砒素成分、F成分を実質的に含有しないことを特徴とするモールドプレス成形用光学ガラス。
- 質量%で、Bi2O3+B2O3が60~100%であることを特徴とする請求項1に記載のモールドプレス成形用光学ガラス。
- 質量%で、ZnO 0~10%を含有することを特徴とする請求項1または2に記載のモールドプレス成形用光学ガラス。
- 質量%で、SiO2 0~3%未満を含有することを特徴とする請求項1~3のいずれかに記載のモールドプレス成形用光学ガラス。
- 質量%で、La2O3+Gd2O3+Ta2O5が7.5~30%であることを特徴とする請求項1~4のいずれかに記載のモールドプレス成形用光学ガラス。
- 質量比で、Bi2O3/B2O3が5以下であることを特徴とする請求項1~5のいずれかに記載のモールドプレス成形用光学ガラス。
- 質量%で、TiO2 0.1~15%を含有することを特徴とする請求項1~6のいずれかに記載のモールドプレス成形用光学ガラス。
- Bi2O3+B2O3が99%以上であることを特徴とする請求項1~7のいずれかに記載のモールドプレス成形用光学ガラス。
- Bi2O3+B2O3+TiO2が99%以上であることを特徴とする請求項1~8のいずれかに記載のモールドプレス成形用光学ガラス。
- ガラスの着色度λ70が500nm以下であることを特徴とする請求項1~9のいずれかに記載のモールドプレス成形用光学ガラス。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN2010800264137A CN102459106A (zh) | 2009-06-15 | 2010-06-14 | 模压成型用光学玻璃 |
US13/320,755 US8697589B2 (en) | 2009-06-15 | 2010-06-14 | Optical glass for mold press forming |
US14/055,929 US8951926B2 (en) | 2009-06-15 | 2013-10-17 | Optical glass for mold press forming |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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JP2009142043 | 2009-06-15 | ||
JP2009-142043 | 2009-06-15 | ||
JP2009218254 | 2009-09-22 | ||
JP2009-218254 | 2009-09-22 | ||
JP2010-106306 | 2010-05-06 | ||
JP2010106306A JP5843125B2 (ja) | 2009-06-15 | 2010-05-06 | モールドプレス成形用光学ガラス |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US13/320,755 A-371-Of-International US8697589B2 (en) | 2009-06-15 | 2010-06-14 | Optical glass for mold press forming |
US14/055,929 Continuation US8951926B2 (en) | 2009-06-15 | 2013-10-17 | Optical glass for mold press forming |
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WO2010147072A1 true WO2010147072A1 (ja) | 2010-12-23 |
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PCT/JP2010/060018 WO2010147072A1 (ja) | 2009-06-15 | 2010-06-14 | モールドプレス成形用光学ガラス |
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US (2) | US8697589B2 (ja) |
JP (1) | JP5843125B2 (ja) |
CN (1) | CN102459106A (ja) |
WO (1) | WO2010147072A1 (ja) |
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CN102765881A (zh) * | 2011-05-02 | 2012-11-07 | 株式会社小原 | 光学玻璃、预成型体、及光学元件 |
JP2012224496A (ja) * | 2011-04-18 | 2012-11-15 | Ohara Inc | 光学ガラス、プリフォーム、及び光学素子 |
JP2019119646A (ja) * | 2018-01-04 | 2019-07-22 | 日本電気硝子株式会社 | 光学素子の製造方法 |
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JP5770973B2 (ja) * | 2009-12-25 | 2015-08-26 | 株式会社住田光学ガラス | 光学ガラスおよび光学素子 |
JP5704503B2 (ja) * | 2010-09-28 | 2015-04-22 | 日本電気硝子株式会社 | 光学ガラス |
JP2013256426A (ja) * | 2012-06-14 | 2013-12-26 | Nippon Electric Glass Co Ltd | 光学ガラス |
JP2014015384A (ja) * | 2012-06-15 | 2014-01-30 | Ohara Inc | 光学ガラス、プリフォーム、及び光学素子 |
JP2014015383A (ja) * | 2012-06-15 | 2014-01-30 | Ohara Inc | 光学ガラス、プリフォーム、及び光学素子 |
WO2014188920A1 (ja) * | 2013-05-23 | 2014-11-27 | 旭硝子株式会社 | ガラス組成物、ガラスの製造方法、光変換部材、光変換部材の製造方法、照明光源および液晶表示装置 |
CA3117892A1 (en) | 2018-11-26 | 2020-06-04 | Owens Corning Intellectual Capital, Llc | High performance fiberglass composition with improved elastic modulus |
KR20210096138A (ko) | 2018-11-26 | 2021-08-04 | 오웬스 코닝 인텔렉츄얼 캐피탈 엘엘씨 | 비탄성률이 향상된 고성능 섬유 유리 조성물 |
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Cited By (5)
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JP2012224496A (ja) * | 2011-04-18 | 2012-11-15 | Ohara Inc | 光学ガラス、プリフォーム、及び光学素子 |
CN102765881A (zh) * | 2011-05-02 | 2012-11-07 | 株式会社小原 | 光学玻璃、预成型体、及光学元件 |
JP2012232874A (ja) * | 2011-05-02 | 2012-11-29 | Ohara Inc | 光学ガラス、プリフォーム、及び光学素子 |
JP2019119646A (ja) * | 2018-01-04 | 2019-07-22 | 日本電気硝子株式会社 | 光学素子の製造方法 |
JP7001999B2 (ja) | 2018-01-04 | 2022-01-20 | 日本電気硝子株式会社 | 光学素子の製造方法 |
Also Published As
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US20140045675A1 (en) | 2014-02-13 |
US20120065051A1 (en) | 2012-03-15 |
JP5843125B2 (ja) | 2016-01-13 |
US8951926B2 (en) | 2015-02-10 |
CN102459106A (zh) | 2012-05-16 |
JP2011088806A (ja) | 2011-05-06 |
US8697589B2 (en) | 2014-04-15 |
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