WO2013168579A1 - 光学ガラス及び光学素子 - Google Patents
光学ガラス及び光学素子 Download PDFInfo
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- WO2013168579A1 WO2013168579A1 PCT/JP2013/062163 JP2013062163W WO2013168579A1 WO 2013168579 A1 WO2013168579 A1 WO 2013168579A1 JP 2013062163 W JP2013062163 W JP 2013062163W WO 2013168579 A1 WO2013168579 A1 WO 2013168579A1
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- Prior art keywords
- glass
- optical
- content
- optical glass
- transmittance
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- 239000005304 optical glass Substances 0.000 title claims abstract description 36
- 230000003287 optical effect Effects 0.000 title claims abstract description 17
- 239000011521 glass Substances 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 5
- 229910052788 barium Inorganic materials 0.000 claims abstract description 4
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 4
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 4
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 4
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 4
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 4
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 3
- 238000012360 testing method Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 abstract 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 238000002834 transmittance Methods 0.000 description 24
- 238000004017 vitrification Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 8
- 239000005365 phosphate glass Substances 0.000 description 7
- 238000000465 moulding Methods 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- 229910018068 Li 2 O Inorganic materials 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 239000006060 molten glass Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000009477 glass transition Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910052776 Thorium Inorganic materials 0.000 description 2
- 229910052770 Uranium Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
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
- C03C3/00—Glass compositions
- C03C3/12—Silica-free oxide glass compositions
- C03C3/16—Silica-free oxide glass compositions containing phosphorus
- C03C3/17—Silica-free oxide glass compositions containing phosphorus containing aluminium or beryllium
-
- 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
- C03C3/16—Silica-free oxide glass compositions containing phosphorus
-
- 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
- C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
- C03C4/082—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths for infrared absorbing glass
-
- 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
- C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
- C03C4/085—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths for ultraviolet absorbing glass
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
-
- 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
- C03C2204/00—Glasses, glazes or enamels with special properties
Definitions
- the present invention relates to optical glasses and optical elements suitable for digital camera lenses, heat ray absorbing glass, IR / UV absorbing glass, and the like.
- phosphate glass has been widely used as optical glass used in electronic devices and the like.
- Phosphate glass has a high transmittance in the visible region and, depending on the composition, can absorb light in the near infrared to infrared region efficiently. Therefore, phosphate-based glass is widely used in the electronic field, such as digital camera lenses, heat ray absorbing glass, IR / UV absorbing glass.
- Patent Document 1 contains P 2 O 5 , SnO, ZnO, an alkali metal oxide, and an alkaline earth metal oxide as essential components, and has an annealing point in the temperature range of 300 ° C. to 340 ° C., about 1
- a substantially fluorine-free phosphate glass having a refractive index in the vicinity of .605 and a linear thermal expansion coefficient in the range of 145 to 170 ⁇ 10 ⁇ 7 / ° C. is described.
- Patent Document 2 contains P 2 O 5 , Al 2 O 3 , K 2 O or Li 2 O as essential components, a refractive index of 1.45 to 1.65, and an Abbe number of 65 or more.
- a phosphate optical glass having the following optical constant is described.
- the phosphate glass has low weather resistance, and its surface is likely to be eroded by burns or weathering during use over a long period of time.
- P 2 O 5 which is a raw material of phosphate glass tends to evaporate during melting, a composition with a high P 2 O 5 content makes it difficult to obtain a homogeneous glass and poor mass productivity. There is.
- an object of the present invention is to provide an optical glass having desired optical characteristics, excellent weather resistance, and excellent mass productivity.
- the present invention is based on the mol% of the oxide and the glass composition is P 2 O 5 5 to 40%, SO 3 1 to 35%, R ′ 2 O 10 to 30% (R ′ is Li, Na or K) , RO 20 to 50% (R is Mg, Ca, Sr, Ba or Zn) and CuO + Fe 2 O 3 + CoO + CeO 2 0.001 to 15%.
- the present inventors have included SO 3 in a phosphate-based optical glass and a predetermined amount of any one or more of CuO, Fe 2 O 3 , CoO, and CeO 2. It has been found that the weather resistance can be improved while achieving the desired optical properties, and the glass can be stabilized at the time of melting.
- CuO, Fe 2 O 3 , CoO, and CeO 2 each have a property of absorbing light in a predetermined wavelength range. Therefore, an optical glass element that absorbs light in a desired wavelength region can be obtained by appropriately containing these components.
- vitrification tends to become unstable.
- SO 3 sulfur trioxide
- the optical glass of the present invention is preferably grade 1 to 5 in the JOGIS water resistance test.
- the present invention relates to an optical element comprising any one of the above optical glasses.
- an optical glass having desired optical characteristics, excellent weather resistance, and excellent mass productivity.
- FIG. 4 and no. It is the photograph after a weather resistance test of 15 samples.
- FIG. 4 and no. 13 is a photograph after forming 13 molten glass.
- FIG. It is a graph which shows the transmittance
- FIG. 4 is a graph showing a transmittance curve of a sample No. 4;
- FIG. It is a graph which shows the transmittance
- composition of the optical glass of the present invention is limited as described above will be described below.
- % means “mol%” unless otherwise specified.
- P 2 O 5 is an essential component for forming a glass skeleton.
- the content of P 2 O 5 is 5 to 40%, preferably 10 to 30%, more preferably 15 to 25%, and still more preferably 15 to 20%.
- the content of P 2 O 5 is too small, there is a tendency for vitrification tends to be unstable.
- the content of P 2 O 5 is too large, the weather resistance tends to lower.
- SO 3 is an effective component for improving the weather resistance while maintaining the optical characteristics. There is also an effect of stabilizing vitrification.
- the SO 3 content is 1 to 35%, preferably 5 to 30%, more preferably 10 to 25%, and still more preferably 15 to 20%. If the content of SO 3 is too small, the above effect is difficult to obtain. On the other hand, when the content of SO 3 is too large, vitrification tends to become unstable.
- R ′ 2 O (R ′ is Li, Na, or K) is a component that stabilizes vitrification.
- the content of R ′ 2 O is 10 to 30%, preferably 12 to 28%, more preferably 15 to 23%.
- R ′ 2 O any one of Li 2 O, Na 2 O, and K 2 O may be contained, or two or more kinds may be contained. When 2 or more types are included, the total amount needs to satisfy the above range.
- the content of each component of R ′ 2 O is preferably as follows.
- the content of Li 2 O is preferably 0 to 5%, and more preferably 0 to 3%.
- the content of Li 2 O is too large, there is a tendency for vitrification becomes unstable and phase separation.
- Na 2 O is a component that gives the most stable vitrification region due to the influence of its ionic radius and ligand field. Therefore, it becomes easy to enjoy the effect of stabilizing vitrification by positively containing Na 2 O among R ′ 2 O. Therefore, the content of Na 2 O is preferably 5 to 30%, more preferably 12 to 28%, and still more preferably 15 to 23%.
- K 2 O can be contained for the purpose of adjusting the viscosity. However, if the content is too large, vitrification tends to be unstable and phase separation tends to occur. Therefore, the content of K 2 O is preferably 0 to 10%, more preferably 0 to 8%.
- RO is Mg, Ca, Sr, Ba or Zn
- the RO content is 20 to 50%, preferably 25 to 48%, and more preferably 30 to 45%. If the RO content is too small, vitrification tends to become unstable. Moreover, there exists a tendency to be inferior to a weather resistance. On the other hand, when there is too much content of RO, there exists a tendency for vitrification to become unstable rather.
- any one of MgO, CaO, SrO, BaO or ZnO may be contained, or two or more kinds may be contained. When 2 or more types are included, the total amount needs to satisfy the above range.
- the content of each component of RO is preferably as follows.
- the contents of CaO, SrO, BaO and MgO are each preferably 0 to 20%, more preferably 0 to 10%, and particularly preferably 0.1 to 8%.
- ZnO is a component that is particularly effective in improving vitrification and improving weather resistance among ROs.
- the content of ZnO is preferably 10 to 50%, more preferably 20 to 48%, further preferably 25 to 48%, and particularly preferably 30 to 45%.
- CuO optical glass of the present invention by containing the Fe 2 O 3, CoO and any one or more of CeO 2, it is possible to absorb light in a specific wavelength range. Moreover, these components have the effect of strengthening the phosphate network of glass and improving weather resistance when coexisting with SO 3 .
- the total content of CuO, Fe 2 O 3 , CoO, and CeO 2 is 0.001 to 15%, preferably 0.01 to 12%, and preferably 0.1 to 10%. More preferably, it is 0.1 to 9%. If the content of these components is too small, it is difficult to obtain the above effect. On the other hand, when there are too many these components, vitrification tends to become unstable.
- the content of each component of CuO, Fe 2 O 3 , CoO and CeO 2 is preferably 0 to 15%, more preferably 0 to 12%, and 0.001 to 10%. Is more preferable, and 0.1 to 9% is particularly preferable.
- CuO is preferably 1 to 9% and more preferably 2 to 8% in order to obtain the optical characteristics described later.
- Metal elements in CuO, Fe 2 O 3 , CoO, and CeO 2 exist as ions in the glass, and each absorbs light in a specific wavelength region. Since the absorption wavelength region varies depending on the valence and coordination state of ions, it is necessary to control the valence and coordination state in the glass in order to impart a desired light absorption effect. Generally, these ions tend to have higher absorption intensity in the infrared region or the ultraviolet region as the oxidation number increases. Therefore, an oxidizing agent such as antimony (Sb) is added to the glass in order to obtain desired light absorption characteristics.
- the optical glass of the present invention is highly oxidizable, it has a feature that good light absorption characteristics can be obtained without adding an oxidizing agent. Therefore, an optical glass element that absorbs light in a desired wavelength region can be obtained by appropriately containing the above components.
- the optical glass of the present invention by including CuO in the optical glass of the present invention, light in the near infrared region can be sharply cut while maintaining high transmittance in the visible region. Therefore, it becomes an optical glass suitable as a near infrared cut filter. Specifically, an optical glass having a thickness of 2.5 mm, a transmittance of 70% or more at a wavelength of 500 nm, and a transmittance of 50% or less at a wavelength of 700 nm can be obtained.
- the wavelength ( ⁇ 50 ) having a thickness of 0.5 mm and showing a transmittance of 50% in the wavelength range of 500 to 700 nm is in the range of 590 to 650 nm (more preferably 600 to 630 nm), and the transmittance at 500 nm is 75%. It is possible to obtain an optical glass with a transmittance of 700% or less (more than 80%), 30% or less (more than 10%) at 700 nm and a transmittance of 1000% or less at 25% or less (more than 20%) It is.
- the optical glass of the present invention by containing the Fe 2 O 3, can be cut sharply the light in the ultraviolet region, it is suitable as a UV cut glass.
- the difference ( ⁇ 70 ⁇ 5 ) between the wavelength ⁇ 70 exhibiting a transmittance of 70% and the wavelength ⁇ 5 exhibiting a transmittance of 5% is 100 nm at a thickness of 2.5 mm. It becomes possible to obtain less optical glass.
- the optical glass of the present invention may contain the following components.
- Al 2 O 3 is a component that contributes to improvement of weather resistance when added in a small amount, and improves chemical durability such as acid resistance and water resistance.
- the content of Al 2 O 3 is preferably 0 to 10%, more preferably 0 to 5%.
- vitrification tends to be unstable.
- WO 3 is a component that stabilizes vitrification and improves weather resistance.
- the content of WO 3 is preferably 0 to 5%, more preferably 0 to 2%.
- vitrification becomes unstable easily devitrified, as a result, there is a tendency that the transmittance in the visible region is reduced.
- Bi 2 O 3 and La 2 O 3, Y 2 O 3, Gd 2 O 3, TeO 2, SiO 2, Ta 2 O 5, Nb 2 O 5, TiO 2, ZrO 2 or Sb 2 O 3, etc. May be contained within a range not impairing the effects of the present invention.
- the content of these components is preferably 0 to 3%, and more preferably 0 to 1%.
- the contents of U and Th in the optical glass of the present invention are each 20 ppb or less.
- the ⁇ dose emitted from the optical glass of the present invention is preferably 1.0 c / cm 2 ⁇ h or less.
- the optical glass of the present invention has a refractive index (nd) of about 1.5 to 1.7, more preferably about 1.52 to 1.65, and an Abbe number ( ⁇ d) of about 50 to 70, more preferably about 55 to 65. It is preferable to have.
- the optical glass of the present invention preferably satisfies a glass transition point (Tg) of 400 ° C. or lower, more preferably 350 ° C. or lower. Thereby, there exists an advantage that mold press molding becomes possible, for example at low temperature.
- Tg glass transition point
- the optical glass of the present invention is preferably grade 1-5 in the JOGIS water resistance test, and more preferably grade 1-4. Thereby, even if it exposes to a hot and humid environment for a long time, it becomes difficult to deteriorate.
- glass raw materials are prepared so as to have a desired composition and then melted in a glass melting furnace.
- the molten glass is rapidly cast to produce a glass block, and an optical element is obtained by grinding, polishing, and washing. Or you may produce the optical element which has a desired shape by carrying out mold press molding using the metal mold
- optical glass of this invention is demonstrated in detail based on an Example, this invention is not limited to these Examples.
- Table 1 shows examples (Nos. 1 to 11) of the present invention, and Table 2 shows comparative examples (Nos. 12 to 16).
- glass raw materials prepared so as to have the composition shown in each table were put into a platinum crucible and melted at 700 to 800 ° C. to be homogeneous.
- the molten glass was poured out on the carbon plate, cooled and solidified, and then annealed to prepare a sample.
- Refractive index (nd) is shown as a measured value for d-line (587.6 nm) of a helium lamp.
- the refractive index was measured using a refractometer (KPR-2000 manufactured by Kalnew). The same applies to the following measurements.
- the Abbe number ( ⁇ d) is obtained by using the values of the refractive index (nd), the refractive index nF of the F-line (486.13 nm) of the hydrogen lamp, and the refractive index nC of the C-line (656.27 nm) of the hydrogen lamp.
- the number ( ⁇ d) (nd ⁇ 1) / (nF ⁇ nC) was calculated from the equation.
- the glass transition point was determined from the intersection of the straight line in the low temperature region and the straight line in the high temperature region in the thermal expansion curve obtained with a thermal expansion measuring device (dilatometer).
- Weather resistance was evaluated as follows. A sample cut into a size of 25 ⁇ 30 ⁇ 5 mm was mirror-polished with cerium oxide powder to prepare a sample for weather resistance test. A sample for a weather resistance test was allowed to stand for 24 hours in an environment of a temperature of 60 ° C. and a humidity of 90%, and a decrease in transmittance at a wavelength of 400 nm before and after the test was determined. The case where the decrease in transmittance was less than 10% was evaluated as “ ⁇ ”, and the case where it was 10% or more was evaluated as “x”.
- the transmittance was measured using a UV3100PC manufactured by Shimadzu Corporation on samples of 25 ⁇ 30 ⁇ 2.5 mm and 25 ⁇ 30 ⁇ 0.5 mm whose surfaces were mirror-polished.
- ⁇ 70 - ⁇ 5 at a thickness of 2.5 mm is the difference between the wavelength ⁇ 70 at which the transmittance is 70 % and the wavelength ⁇ 5 at which the transmittance is 5% in the wavelength range of 300 to 500 nm in the obtained transmittance curve.
- ⁇ 50 at a thickness of 0.5 mm was a wavelength at which the transmittance was 50% in the wavelength range of 500 to 700 nm in the obtained transmittance curve.
- Sample No. 4 showed no surface degradation after the weather resistance test.
- the 15 samples were confirmed to have surface deterioration after the weather resistance test.
- FIG. Sample No. 4 was vitrified without devitrification after molding. Sample 13 was not vitrified at the time of molding and became a lump with metallic luster.
- the optical glass of the present invention is used for a lens of a digital camera, a CCD cover glass, a heat ray absorbing glass used for a CCD or a CMOS, and an optical filter such as an IR / UV absorbing glass, a visibility correction filter, a color adjustment filter, etc. Is possible.
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Abstract
Description
表1は本発明の実施例(No.1~11)、表2は比較例(No.12~16)を示す。
得られた試料について、屈折率(nd)、アッベ数(νd)、ガラス転移点(Tg)、耐候性、耐水性、透過率を以下の方法により測定または評価した。結果を表1および表2に示す。また、No.4およびNo.15の試料の耐候性試験後の写真を図1に、No.4およびNo.13の溶融ガラス成形後の写真を図2に、No.2、No.4およびNo.11の各試料の透過率曲線を図3~5にそれぞれ示す。
実施例であるNo.1~11の試料は所望の光学特性を有しつつ、耐候性および耐水性に優れていた。一方、比較例であるNo.12、15、16の試料は耐候性および耐水性に劣っていた。また、No.15の試料は、波長300~500nmの範囲において、λ70-λ5が100nmより大きく、紫外域の吸収特性に劣っていた。No.13、14の試料はガラス化しなかった。
Claims (3)
- 酸化物基準のモル%で、ガラス組成として、P2O5 5~40%、SO3 1~35%、R’2O 10~30%(R’はLi、NaまたはK)、RO 20~50%(RはMg、Ca、Sr、BaまたはZn)およびCuO+Fe2O3+CoO+CeO2 0.001~15%を含有することを特徴とする光学ガラス。
- JOGIS耐水性試験において1~5級であることを特徴とする請求項1に記載の光学ガラス。
- 請求項1または2に記載の光学ガラスからなることを特徴とする光学素子。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN201380016244.2A CN104203853B (zh) | 2012-05-07 | 2013-04-25 | 光学玻璃和光学元件 |
JP2013519656A JP6048403B2 (ja) | 2012-05-07 | 2013-04-25 | 光学ガラス及び光学素子 |
US14/397,258 US9169153B2 (en) | 2012-05-07 | 2013-04-25 | Optical glass and optical element |
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JP2012-105618 | 2012-05-07 | ||
JP2012105618 | 2012-05-07 |
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WO2013168579A1 true WO2013168579A1 (ja) | 2013-11-14 |
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US (1) | US9169153B2 (ja) |
JP (1) | JP6048403B2 (ja) |
CN (1) | CN104203853B (ja) |
WO (1) | WO2013168579A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015001944A1 (ja) * | 2013-07-05 | 2015-01-08 | 日本電気硝子株式会社 | Irカットフィルタ用ガラス |
JP2016018092A (ja) * | 2014-07-09 | 2016-02-01 | 日本電気硝子株式会社 | 赤外線カットフィルタ |
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JP2006518696A (ja) * | 2003-02-25 | 2006-08-17 | ショット アクチエンゲゼルシャフト | 抗微生物作用性スルホリン酸ガラス |
JP2005082406A (ja) * | 2003-09-04 | 2005-03-31 | Hoya Corp | 精密プレス成形用プリフォームおよびその製造方法並びに光学素子およびその製造方法 |
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JP2016018092A (ja) * | 2014-07-09 | 2016-02-01 | 日本電気硝子株式会社 | 赤外線カットフィルタ |
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US9169153B2 (en) | 2015-10-27 |
CN104203853B (zh) | 2016-07-06 |
JP6048403B2 (ja) | 2016-12-21 |
US20150041737A1 (en) | 2015-02-12 |
CN104203853A (zh) | 2014-12-10 |
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