CN117687138A - Optical filter and manufacturing method thereof - Google Patents
Optical filter and manufacturing method thereof Download PDFInfo
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- CN117687138A CN117687138A CN202410146187.XA CN202410146187A CN117687138A CN 117687138 A CN117687138 A CN 117687138A CN 202410146187 A CN202410146187 A CN 202410146187A CN 117687138 A CN117687138 A CN 117687138A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 239000011521 glass Substances 0.000 claims abstract description 78
- 239000003086 colorant Substances 0.000 claims abstract description 53
- 239000000203 mixture Substances 0.000 claims abstract description 29
- 239000011669 selenium Substances 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000012298 atmosphere Substances 0.000 claims abstract description 23
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 23
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 23
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims abstract description 22
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052711 selenium Inorganic materials 0.000 claims abstract description 22
- 239000011593 sulfur Substances 0.000 claims abstract description 22
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 22
- 238000010521 absorption reaction Methods 0.000 claims abstract description 18
- 239000011261 inert gas Substances 0.000 claims abstract description 16
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000002834 transmittance Methods 0.000 claims description 24
- 229910052783 alkali metal Inorganic materials 0.000 claims description 15
- 150000001340 alkali metals Chemical class 0.000 claims description 15
- 239000011734 sodium Substances 0.000 claims description 12
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 11
- 229910052796 boron Inorganic materials 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- 229910052788 barium Inorganic materials 0.000 claims description 10
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052712 strontium Inorganic materials 0.000 claims description 10
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 10
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 8
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 239000011575 calcium Substances 0.000 claims description 8
- 229910052700 potassium Inorganic materials 0.000 claims description 8
- 239000011591 potassium Substances 0.000 claims description 8
- 229910052708 sodium Inorganic materials 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 239000011701 zinc Substances 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- 229910052791 calcium Inorganic materials 0.000 claims description 5
- 239000001307 helium Substances 0.000 claims description 5
- 229910052734 helium Inorganic materials 0.000 claims description 5
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 5
- 229910052754 neon Inorganic materials 0.000 claims description 5
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 3
- 239000012300 argon atmosphere Substances 0.000 claims description 2
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 3
- 239000002994 raw material Substances 0.000 description 13
- 238000000411 transmission spectrum Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 230000003595 spectral effect Effects 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 4
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 3
- MARUHZGHZWCEQU-UHFFFAOYSA-N 5-phenyl-2h-tetrazole Chemical compound C1=CC=CC=C1C1=NNN=N1 MARUHZGHZWCEQU-UHFFFAOYSA-N 0.000 description 2
- 229910052810 boron oxide Inorganic materials 0.000 description 2
- 229940065285 cadmium compound Drugs 0.000 description 2
- 150000001662 cadmium compounds Chemical class 0.000 description 2
- AQCDIIAORKRFCD-UHFFFAOYSA-N cadmium selenide Chemical compound [Cd]=[Se] AQCDIIAORKRFCD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 2
- 229910001950 potassium oxide Inorganic materials 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- UFQXGXDIJMBKTC-UHFFFAOYSA-N oxostrontium Chemical compound [Sr]=O UFQXGXDIJMBKTC-UHFFFAOYSA-N 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Abstract
The invention relates to a manufacturing method of an optical filter, which comprises the following steps: mixing a white glass component and a colorant component, the colorant component comprising 0.2 to 3 wt% cadmium, 0.2 to 5 wt% sulfur, and 0.2 to 3 wt% selenium; sintering the mixture of the white glass component group and the colorant component group at a first temperature under an inert gas atmosphere to form a homogenized glass; and performing a heat treatment on the homogenized glass at a second temperature, wherein the second temperature is lower than the first temperature, and the heat treatment time is longer than 1 hour, so as to form the optical filter. The filter has a thickness of 0.5-mm and a predetermined absorption wavelength range of 10-25 nm.
Description
Technical Field
The present invention relates to an optical device, and more particularly, to an optical filter and a method for manufacturing the same.
Background
In general, acute cut filter (optical sharp cut off filter) has unique transmission characteristics. For example, a long-wave cut filter (long pass filter) has low transmittance in a short wavelength range, rises to high transmittance through a narrow spectral range, and maintains high transmittance in a long wavelength range. The sharp cut filter is a glass substrate to which a cadmium (Cd) compound, such as cadmium sulfide (CdS), cadmium selenide (CdSe), cadmium telluride (CdTe), or a mixture thereof, is added to satisfy the characteristic of high transmittance in the long wavelength range.
However, the thickness of the long-wave pass filter on the market is larger than 2mm (millimeter), and the common thickness is between 2mm and 4 mm. The thickness limitation of the optical long-wave pass filter is difficult to meet the light and thin trend of the current electronic devices such as intelligent mobile phones or wearable devices. Therefore, a thin-type acute cut-off filter with a long wavelength is needed to meet the current market demand.
Disclosure of Invention
In order to solve the above-mentioned problems, a main objective of the present invention is to provide a light filter and a manufacturing method thereof, wherein a thin light filter with a thickness of less than or equal to 0.5 and mm is formed by a specific colorant component and a specific processing step, so as to solve the problem that the thickness of the long-wave pass filter in the prior art cannot conform to the current trend of thinness.
In order to achieve the above object, the present invention provides a method for manufacturing an optical filter, comprising the steps of: mixing a white glass component and a colorant component, the colorant component comprising 0.2 to 3 wt% cadmium (Cd), 0.2 to 5 wt% sulfur (S), and 0.2 to 3 wt% selenium (Se); sintering the mixture of the white glass component group and the colorant component group at a first temperature under an inert gas atmosphere to form a homogenized glass; and performing a heat treatment on the homogenized glass at a second temperature, wherein the second temperature is lower than the first temperature, and the heat treatment time is longer than 1 hour, so as to form an optical filter. The thickness of the optical filter is less than or equal to 0.5mm, and the optical filter has a preset absorption wavelength range, wherein the preset absorption wavelength range is between 10nm and 25nm.
In order to achieve the above object, the present invention further provides an optical filter comprising a white glass component and a colorant component. The colorant component includes 0.2 to 3 wt% cadmium, 0.2 to 5 wt% sulfur, and 0.2 to 3 wt% selenium. After mixing the white glass component and the colorant component, sintering the mixture at a first temperature in an inert gas atmosphere to form homogenized glass, and performing heat treatment on the homogenized glass at a second temperature to form the optical filter, wherein the second temperature is smaller than the first temperature, and the heat treatment time is longer than 1 hour. The thickness of the filter is less than or equal to 0.5mm, and the filter has a preset absorption wavelength range, and the preset absorption wavelength range is between 10 and nm nm and 25nm.
According to an embodiment of the present invention, the white glass component includes 43 to 53 wt% silicon (Si), 0.5 to 3 wt% boron (B), 2 to 5 wt% strontium (Sr), 7 to 10 wt% barium (Ba), 28 to 30 wt% zinc (Zn), and 5 to 8 wt% alkali metal.
According to an embodiment of the invention, the white glass component group further comprises 0.1 to 5% by weight of calcium (Ca).
According to an embodiment of the present invention, the alkali metal includes lithium (Li), sodium (Na), or potassium (K).
According to an embodiment of the invention, the thickness of the filter is between 0.2 and mm and 0.5 and mm.
According to an embodiment of the present invention, the inert gas atmosphere includes a nitrogen (N) atmosphere, a helium (He) atmosphere, a neon (Ne) atmosphere, or an argon (Ar) atmosphere.
According to an embodiment of the invention, the first temperature is between 1200 ℃ and 1400 ℃.
According to an embodiment of the invention, the second temperature is between 400 ℃ and 700 ℃.
According to an embodiment of the invention, the time of the heat treatment is between 1 hour and 100 hours.
According to an embodiment of the invention, the transmittance of the filter for incident light with a wavelength greater than 420 and nm is greater than 80%.
According to an embodiment of the present invention, the half-transmission wavelength of the filter is between 390nm and 460 nm.
According to an embodiment of the invention, the colorant composition includes 2 to 3 wt% cadmium, 1 to 2 wt% sulfur, and 0.2 to 1 wt% selenium.
According to an embodiment of the present invention, the white glass component includes 43 to 53 wt% silicon, 1.3 to 1.8 wt% boron, 3 to 4 wt% strontium, 8 to 9 wt% barium, 28 to 30 wt% zinc, and 5 to 8 wt% alkali metal.
Due to the application of the technical scheme, the manufacturing method of the optical filter and the optical filter manufactured by the manufacturing method comprise a white glass component group and a colorant component group. By defining the colorant composition to include 0.2 wt% to 3 wt% cadmium, 0.2 wt% to 5 wt% sulfur, and 0.2 wt% to 3 wt% selenium, and treating at a first temperature and a second temperature, respectively, the resulting filter has better optical characteristics when the thickness is less than or equal to 0.5mm, so as to meet the current demand of light and thin trend.
Drawings
Fig. 1 is a flowchart of a method for manufacturing an optical filter according to an embodiment of the invention.
Fig. 2 is a schematic diagram of an optical filter according to an embodiment of the invention.
Fig. 3 is a graph showing the transmission spectrum of the optical filter manufactured according to experimental example 1.
Fig. 4 is a graph showing the transmission spectrum of the optical filter manufactured according to experimental example 2.
Fig. 5 is a graph showing the transmission spectrum of the filter manufactured according to experimental example 3.
Detailed Description
In order to better understand the technical content of the present invention, the following description is given by way of specific preferred embodiments.
Fig. 1 is a flowchart of a method for manufacturing a filter according to an embodiment of the invention, and fig. 2 is a schematic diagram of a filter according to an embodiment of the invention, please refer to fig. 1 and 2. The filter 1 of the present embodiment is composed of a white glass component group and a colorant component group, that is, the filter 1 of the present embodiment includes a white glass component group and a colorant component group. The white glass component and the colorant component are element components obtained by sintering the optical filter 1. The details of the white glass component group and the colorant component group will be further described below with reference to the method for manufacturing the optical filter 1 shown in fig. 1.
Step S10: a white glass component and a colorant component are mixed.
First, the white glass component is a sintered element component of common transparent glass (clear glass), which can be, for example, but not limited to, silicon (Si), boron (B), aluminum (Al), zinc (Zn), magnesium (Mg),Sodium (Na), potassium (K), calcium (Ca), and the like. Thus, during the preparation, metalloid oxides, such as silica (SiO 2 ) Boron oxide (B) 2 O 3 ) The method comprises the steps of carrying out a first treatment on the surface of the Metal oxides, e.g. sodium oxide (Na 2 O), potassium oxide (K) 2 O), aluminum oxide (Al 2 O 3 ) Zinc oxide (ZnO), magnesium oxide (MgO); or carbonates, e.g. sodium carbonate (Na 2 CO 3 ) Potassium carbonate (K) 2 CO 3 ) Magnesium carbonate (MgCO) 3 ) Calcium carbonate (CaCO) 3 ) And the like.
In this embodiment, the white glass component includes silicon, boron, strontium (Sr), barium (Ba), zinc, alkali metal, and the like. Wherein the alkali metal may include lithium (Li), sodium, or potassium. Preferably, the white glass component of the present embodiment includes 43 to 53 weight percent (Wt%) silicon, 0.5 to 3 Wt% boron, 2 to 5 Wt% strontium, 7 to 10 Wt% barium, 28 to 30 Wt% zinc, and 5 to 8 Wt% alkali metal.
Thus, in the preparation, silica, boron oxide, strontium oxide (SrO), barium carbonate (BaCO) 3 ) Zinc oxide, sodium carbonate and potassium carbonate. Wherein, the raw materials of the alkali metal can also be sodium oxide and potassium oxide. Preferably, the white glass component group may further include 0.1 to 5% by weight of calcium (Ca), and the raw material may be calcium carbonate.
In this embodiment, the colorant composition includes cadmium (Cd), sulfur (S), and selenium (Se). Specifically, the colorant component includes 0.2 to 3 wt% cadmium, 0.2 to 5 wt% sulfur, and 0.2 to 3 wt% selenium. In preparation, cadmium sulfide (CdS) and cadmium selenide (CdSe) can be used as raw materials for the colorant component group.
The raw materials of the white glass component group and the raw materials of the colorant component group are uniformly mixed according to the above-mentioned ratio, and then placed in a crucible, and step S20 is performed.
Step S20: sintering the mixture of the white glass component group and the colorant component group at a first temperature under an inert gas atmosphere to form a homogenized glass.
The crucible containing the mixture of the white glass component group and the colorant component group is placed into an atmosphere furnace filled with inert gas, and the environment is controlled at a first temperature, so that the mixture of the white glass component group and the colorant component group can be sintered at the first temperature under the inert gas atmosphere. Wherein the inert gas may be, for example, but not limited to, nitrogen (N) 2 ) Helium (He), neon (Ne), or argon (Ar). In other words, the inert gas atmosphere may include a nitrogen atmosphere, a helium atmosphere, a neon atmosphere, or an argon atmosphere. In this embodiment, the first temperature is between 1200 ℃ and 1400 ℃.
The mixture of the white glass component group and the colorant component group is sintered under an inert gas atmosphere at a temperature between 1200 ℃ and 1400 ℃ (i.e., a first temperature) to obtain a homogenized glass (referred to as homogenized glass in the present invention). Specifically, since the glass is sintered at the first temperature to avoid crystallization, the glass obtained in step S20 is referred to as homogenized glass. The homogenized glass has not yet had sharp cut-off characteristics, and step S30 is performed.
Step S30: the homogenized glass is heat treated at a second temperature, which is less than the first temperature, for a period of time greater than 1 hour to form a filter 1.
Next, the homogenized glass is placed in a heat treatment furnace, and the homogenized glass thereof is heat-treated at a second temperature. Wherein the second temperature is less than the first temperature. In this embodiment, the second temperature is between 400 ℃ and 700 ℃ and the time of the heat treatment is greater than 1 hour. Treating the homogenized glass at a second lower temperature (i.e. between 400 ℃ and 700 ℃) than the first temperature (i.e. between 1200 ℃ and 1400 ℃), may result in fine crystals of the homogenized glass, thereby forming the filter 1. The homogenized glass treated at the second temperature produced fine crystals that were not visible to the naked eye to form a specific glass color. That is, the second temperature treatment can make the manufactured filter 1 have the characteristic of allowing only the light of a specific wavelength to pass through.
Therefore, the heat treatment in step S30 is also a discoloration treatment for the homogenized glass. In this embodiment, the time of the heat treatment may be between 1 hour and 100 hours. Preferably, the heat treatment time may be 1 hour to 75 hours. More preferably, the heat treatment is carried out for a period of 1 hour to 60 hours. Most preferably, the heat treatment is carried out for a period of time ranging from 1 hour to 30 hours.
As described above, the filter 1 manufactured according to steps S10 to S30 includes a white glass component group and a colorant component group. The component ratios of the white glass component and the colorant component are directly referred to the description of step S10, and are not repeated here.
In this embodiment, the filter 1 is made to have a low transmittance in the short wavelength range, and to be raised to a high transmittance through a narrow spectral range, and to maintain a high transmittance in the long wavelength range by the aforementioned composition ratios of the white glass component group and the colorant component group, and the heat treatment at the two temperatures (i.e., the first and second temperatures). The narrow spectral range may be, for example, a range in which the transmittance of incident light increases from 10% to 80%, and may be between 10nm and 25nm. In this embodiment, the narrow spectral range is referred to as a predetermined absorption wavelength range. In other words, the filter 1 has a predetermined absorption wavelength range, and the predetermined absorption wavelength range is between 10nm and 25nm, so as to meet the optical characteristics of sharp cut-off. The predetermined absorption wavelength range includes two ends, 10nm and 25nm. Preferably, the predetermined absorption wavelength range of the filter 1 of the embodiment can be between 15 nm and 25nm, and includes two ends, 15 nm and 25nm.
For example, the transmittance of the filter 1 of the present embodiment for the incident light with the wavelength ranging from 400 nm to 420nm is increased from 10% to 80%, so the predetermined absorption wavelength range is the difference between 400 nm and 420nm, about 20 nm. In addition, the half-transmission wavelength (t50%) of the filter 1 of the present embodiment is also between 390nm and 460nm, preferably between 400 nm and 420 nm. The transmittance of the filter 1 of the present embodiment to the incident light having a wavelength of more than 420 and nm is more than 80%. That is, the transmittance spectrum curve of the filter 1 of the present embodiment has a transmittance of greater than 80% at a wavelength of greater than 420 and nm (refer to fig. 3). Therefore, the filter 1 of the present embodiment can be used as a long-pass filter. The thickness of the filter 1 manufactured by the manufacturing method described above may be 0.5 or less mm, and the filter may be a thin long-pass filter. Preferably, the thickness of the filter 1 is between 0.2mm and 0.5mm, and includes two ends, 0.2mm and 0.5 mm.
The optical characteristics of the optical filter 1 manufactured by the manufacturing method shown in fig. 1 will be specifically described below with reference to experimental examples 1 and 2.
Experimental example 1: filter 1 was prepared to have a thickness of 0.3. 0.3 mm.
Table one: raw material components and proportions of white glass component group and colorant component group.
According to the raw material components and the proportions thereof described in Table I, the raw materials of the mixed white glass component group and the colorant component group are uniformly mixed and then placed in a crucible (i.e., step S10). Next, the crucible is placed in an atmosphere furnace into which nitrogen gas (i.e., inert gas) is introduced, and the environment is controlled to be between 1200 ℃ and 1400 ℃ (i.e., first temperature) to obtain homogenized glass (i.e., step S20). Finally, the homogenized glass is placed in a heat treatment furnace and heat treated at 400 ℃ to 700 ℃ (i.e. the second temperature). After heat treatment for 1 to 30 hours, filter 1 of the present experimental example having a thickness of 0.3 mm was obtained. The proportions of the respective molecular components included in the filter 1 are shown in table two.
And (II) table: molecular components and proportions of the filter 1 prepared in experimental example 1.
The weight percentages (i.e., wt%) of the respective element components in table two are obtained by conversion based on the weight percentages of the respective raw material components and the molecular weights of the elements in table one. As can be seen from table two, the optical filter 1 prepared in experimental example 1 includes a white glass component group and a colorant component group. The white glass component includes 45 wt% silicon (Si), 1.57 wt% boron (B), 3.83 wt% strontium (Sr), 8.96 wt% barium (Ba), 29.52 wt% zinc (Zn), 2.18 wt% sodium (Na), and 4.27 wt% potassium (K). Wherein, 2.18 weight percent of sodium and 4.27 weight percent of potassium are 6.45 weight percent of alkali metal. The colorant composition included 2.62 wt.% cadmium (Cd), 1.36 wt.% sulfur (S), and 0.69 wt.% selenium (Se).
Therefore, the composition of the filter 1 manufactured in this experimental example is in accordance with the white glass composition group defined in the previous embodiment, and includes 43 to 53 wt% of silicon, 0.5 to 3 wt% of boron, 2 to 5 wt% of strontium, 7 to 10 wt% of barium, 28 to 30 wt% of zinc, and 5 to 8 wt% of alkali metals (i.e., sodium and potassium); and the colorant component comprises 0.2 to 3 wt% cadmium, 0.2 to 5 wt% sulfur, and 0.2 to 3 wt% selenium.
Fig. 3 is a graph showing the transmission spectrum of the optical filter manufactured according to experimental example 1. According to the transmission spectrum graph shown in fig. 3, the transmission of 10% corresponds to a wavelength of about 400 nm, and the transmission of 80% corresponds to a wavelength of about 420 nm. In other words, the transmittance of the filter 1 according to the experimental example 1 for the incident light with the wavelength ranging from 400 nm to 420nm is increased from 10% to 80%. Thus, the predetermined absorption wavelength range is about 20nm, between 10nm and 25nm, and meets the optical characteristics of an acute cut-off. In addition, the optical filter 1 manufactured according to experimental example 1 had a transmittance of more than 80% for the incident light having a wavelength of more than 420nm, and a transmittance of more than 90% for the incident light having a wavelength of more than 440 nm, which corresponds to the optical characteristics of the long-pass filter. The filter 1 produced in accordance with experimental example 1 had a thickness of 0.3. 0.3 mm and was able to be used as a thin long-pass filter.
Experimental example 2: three types of filters 1, 1a, 1b having a thickness of 0.3 mm were prepared.
Table three: the molecular components and proportions of the filters 1, 1a, and 1b (the three tables are abbreviated as filters 1, 1a, and 1 b) prepared in experimental example 2.
The filter 1 in table three is the filter 1 prepared in experimental example 1. The filters 1a and 1b are elemental components in different proportions, and the weight percentage of the raw material (raw material as shown in table one) can be obtained by conversion from the weight percentages and the molecular weights of the elements shown in table three. After the components and weight percentages of the raw materials were obtained, filters 1a and 1b were produced under the same conditions as in experimental example 1.
As shown in table three, the colorant composition of the filter 1a includes 0.1 wt% cadmium (Cd), 0.1 wt% sulfur (S), and 0.1 wt% selenium (Se). The colorant composition of the filter 1b includes 6 wt% cadmium (Cd), 6 wt% sulfur (S), and 6 wt% selenium (Se). In other words, the filters 1a, 1b of experimental example 2 do not conform to the elemental proportions of the colorant component groups defined in the present invention (i.e., 0.2 to 3 wt% cadmium, 0.2 to 5 wt% sulfur, and 0.2 to 3 wt% selenium).
Fig. 4 is a graph of transmission spectrum of the filter manufactured according to experimental example 2, please refer to fig. 4. Specifically, the colorant composition of the filter 1a includes 0.1 wt% cadmium, 0.1 wt% sulfur, and 0.1 wt% selenium, which is less than the lower limit of the colorant composition defined in the present invention (i.e., 0.2 wt% cadmium, 0.2 wt% sulfur, and 0.2 wt% selenium). As can be seen from the transmission spectrum graph shown in fig. 4, the transmittance of the filter 1a for the incident light with the wavelength of 350 nm is about 45%, and the slope of the transmission spectrum graph is gentle. Therefore, the filter 1a cannot satisfy the optical characteristics of the long-pass filter and the sharp cut-off.
In general, in order to satisfy the characteristics of simultaneously achieving a thin profile and maintaining a high transmittance in a long wavelength range, it is considered to increase the ratio of the cadmium compound. For example, the colorant composition of filter 1b includes 6 wt% cadmium, 6 wt% sulfur, and 6 wt% selenium, which is greater than the upper limit of the colorant composition defined by the present invention (i.e., 3 wt% cadmium, 5 wt% sulfur, and 3 wt% selenium). However, increasing the ratio of the cadmium compound causes crystallization of the glass, so that the optical characteristics of the manufactured filter 1b do not satisfy the preferred range defined in the present invention.
Specifically, as can be seen from the transmission spectrum graph shown in fig. 4, the transmittance of the optical filter 1b for the incident light with the wavelength ranging from 580 nm to 680 nm is increased from 10% to 80%, so that the predetermined absorption wavelength range is about 100 nm. Although the filter 1b meets the general optical characteristics of sharp cut-off, the predetermined absorption wavelength range defined by the present invention is within the range of 10nm to 25nm. In addition, the half-transmission wavelength (t50%) of the filter 1b is about 655 nm, and the preferred range of the half-transmission wavelength between 390nm and 460nm is not satisfied in the present invention. Therefore, it can be seen that the upper limit of the colorant component group defined in the present invention (i.e., 3 wt% cadmium, 5 wt% sulfur, and 3 wt% selenium) is also of substantial significance.
It should be noted that the white glass component in experimental example 2 is mainly used to form the whole structure of the filter, the colorant component is mainly used to adjust the spectral characteristics of the filter (such as the transmittance of the filter to light with a specific wavelength and the slope of the spectral curve, etc.), and if the colorant component is not added, the white glass is made to have a substantially full-band high transmittance, so that the spectral characteristics are not affected although the white glass component contents of the three filters, i.e., the filter 1a, and the filter 1b, are different.
Experimental example 3: thin filters 1, 1c, 1d, 1e were prepared with thicknesses of 0.3 mm, 0.2mm, 0.4 mm, 0.5mm, respectively.
Referring to the above table, the raw materials are uniformly mixed and placed in a crucible (i.e., step S10). Then, sintering is performed in a nitrogen atmosphere (i.e., inert gas atmosphere) at a temperature between 1200 ℃ and 1400 ℃ (i.e., first temperature) to obtain homogenized glass (i.e., step S20). Finally, the heat treatment is carried out at 400 ℃ to 700 ℃ (namely, the second temperature) for 1 hour to 30 hours. Finally, filters 1c, 1d, and 1e having thicknesses of 0.2mm, 0.3 nm, 0.4 mm, and 0.5mm in this experimental example were obtained by polishing.
Fig. 5 is a graph showing the transmission spectrum of the filter manufactured according to experimental example 3. As can be seen from the transmission spectrum graph shown in fig. 5, the transmittance of the optical filters 1, 1c, 1d, 1e for the incident light with the wavelengths between 400 nm and 420nm is increased from 10% to 80%, and the optical characteristics of sharp cut-off are met. The transmittance of each of the filters 1, 1c, 1d, and 1e to the incident light having a wavelength of more than 420nm is more than 80%, and the optical characteristics of the long-pass filter are satisfied. As is clear from experimental example 3, the thickness of the filters 1, 1c, 1d, 1e manufactured according to the manufacturing method shown in fig. 1 is less than 0.5. 0.5mm, and thus the filters can be used as thin long-pass filters. The thickness of the filters 1, 1c, 1d, 1e may be between 0.2 and mm and 0.5 and mm, and include two ends, 0.2 and mm and 0.5 and mm.
In summary, the method for manufacturing the optical filter and the optical filter manufactured by the method according to the invention comprise a white glass component group and a colorant component group. The thickness of the manufactured optical filter is less than or equal to 0.5mm by defining the colorant composition to comprise 0.2 to 3 wt% cadmium, 0.2 to 5 wt% sulfur and 0.2 to 3 wt% selenium, and respectively treating at a first temperature and a second temperature, so as to meet the current demand of light and thin trend.
It should be noted that the above-mentioned embodiments are presented for the purpose of illustration and that the scope of the invention is not limited to the above-mentioned embodiments, but rather the scope of the invention is defined by the claims.
Claims (26)
1. A method of manufacturing an optical filter, comprising the steps of:
mixing a white glass component group and a colorant component group, the colorant component group comprising 0.2 to 3 wt% cadmium, 0.2 to 5 wt% sulfur, and 0.2 to 3 wt% selenium;
sintering the mixture of the white glass component group and the colorant component group at a first temperature under an inert gas atmosphere to form a homogenized glass; and
and carrying out heat treatment on the homogenized glass at a second temperature, wherein the second temperature is lower than the first temperature, the heat treatment time is longer than 1 hour, so as to form an optical filter, the thickness of the optical filter is less than or equal to 0.5mm, and the optical filter has a preset absorption wavelength range, and the preset absorption wavelength range is between 10nm and 25nm.
2. The method of manufacturing a filter according to claim 1, wherein: wherein the white glass composition comprises 43 to 53 wt% silicon, 0.5 to 3 wt% boron, 2 to 5 wt% strontium, 7 to 10 wt% barium, 28 to 30 wt% zinc, and 5 to 8 wt% alkali metal.
3. The method of manufacturing a filter according to claim 2, wherein: wherein the white glass component group further comprises 0.1 to 5 wt% calcium.
4. The method of manufacturing a filter according to claim 2, wherein: wherein the alkali metal comprises lithium, sodium, or potassium.
5. The method of manufacturing a filter according to claim 1, wherein: wherein the thickness of the filter is between 0.2mm and 0.5 mm.
6. The method of manufacturing a filter according to claim 1, wherein: wherein the inert gas atmosphere comprises a nitrogen atmosphere, a helium atmosphere, a neon atmosphere or an argon atmosphere.
7. The method of manufacturing a filter according to claim 1, wherein: wherein the first temperature is between 1200 ℃ and 1400 ℃.
8. The method of manufacturing a filter according to claim 1, wherein: wherein the second temperature is between 400 ℃ and 700 ℃.
9. The method of manufacturing a filter according to claim 1, wherein: wherein the time of the heat treatment is between 1 hour and 100 hours.
10. The method of manufacturing a filter according to claim 1, wherein: wherein the optical filter has a transmittance of greater than 80% for incident light having a wavelength greater than 420 nm.
11. The method of manufacturing a filter according to claim 1, wherein: wherein the half-penetration wavelength of the filter is between 390nm and 460 nm.
12. The method of manufacturing a filter according to claim 1, wherein: the colorant composition includes 2 to 3 wt% cadmium, 1 to 2 wt% sulfur, and 0.2 to 1 wt% selenium.
13. The method of manufacturing a filter according to claim 2, wherein: the white glass component includes 43 to 53 wt% silicon, 1.3 to 1.8 wt% boron, 3 to 4 wt% strontium, 8 to 9 wt% barium, 28 to 30 wt% zinc, and 5 to 8 wt% alkali metal.
14. An optical filter, comprising:
a white glass composition group; and
A colorant component comprising 0.2 to 3 wt% cadmium, 0.2 to 5 wt% sulfur, and 0.2 to 3 wt% selenium;
after the white glass component and the colorant component are mixed, sintering the mixture at a first temperature in an inert gas atmosphere to form homogenized glass, and performing heat treatment on the homogenized glass at a second temperature to form the optical filter, wherein the second temperature is less than the first temperature, and the heat treatment time is more than 1 hour;
the thickness of the optical filter is less than or equal to 0.5 and mm, and the optical filter has a preset absorption wavelength range, and the preset absorption wavelength range is between 10nm and 25nm.
15. The filter of claim 14, wherein: wherein the white glass composition comprises 43 to 53 wt% silicon, 0.5 to 3 wt% boron, 2 to 5 wt% strontium, 7 to 10 wt% barium, 28 to 30 wt% zinc, and 5 to 8 wt% alkali metal.
16. The filter of claim 15, wherein: wherein the white glass component group further comprises 0.1 to 5 wt% calcium.
17. The filter of claim 15, wherein: wherein the alkali metal comprises lithium, sodium, or potassium.
18. The filter of claim 14, wherein: wherein the thickness of the filter is between 0.2mm and 0.5 mm.
19. The filter of claim 14, wherein: wherein the inert gas atmosphere comprises a nitrogen gas, a helium gas, a neon gas or an argon gas.
20. The filter of claim 14, wherein: wherein the first temperature is between 1200 ℃ and 1400 ℃.
21. The filter of claim 14, wherein: wherein the second temperature is between 400 ℃ and 700 ℃.
22. The filter of claim 14, wherein: wherein the time of the heat treatment is between 1 hour and 100 hours.
23. The filter of claim 14, wherein: wherein the optical filter has a transmittance of greater than 80% for incident light having a wavelength greater than 420 nm.
24. The filter of claim 14, wherein: wherein the half-penetration wavelength of the filter is between 390nm and 460 nm.
25. The filter of claim 14, wherein: the colorant composition includes 2 to 3 wt% cadmium, 1 to 2 wt% sulfur, and 0.2 to 1 wt% selenium.
26. The filter of claim 15, wherein: the white glass component includes 43 to 53 wt% silicon, 1.3 to 1.8 wt% boron, 3 to 4 wt% strontium, 8 to 9 wt% barium, 28 to 30 wt% zinc, and 5 to 8 wt% alkali metal.
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| US3785722A (en) * | 1972-06-20 | 1974-01-15 | Corning Glass Works | USE OF SiO{11 -NB{11 O{11 {11 AND/OR Ta{11 O{11 {11 GLASSES AS ULTRAVIOLET FILTERS |
| US3806349A (en) * | 1969-05-28 | 1974-04-23 | Hoya Glass Works Ltd | Cds,se containing infrared transmitting zinc silicate glass |
| CN1340035A (en) * | 1999-02-12 | 2002-03-13 | 康宁股份有限公司 | Colourless inorganic glasses with a sharp optical absorption cut off between 370 and 425 nm, products from said glasses |
| CN1406894A (en) * | 2001-08-22 | 2003-04-02 | 舱壁玻璃公司 | Color optical glass and use thereof and sharp cutoff optical filter |
| CN1406895A (en) * | 2001-08-22 | 2003-04-02 | 舱壁玻璃公司 | Color optical glass and its use and optical sharp cutoff filter |
| JP2006182584A (en) * | 2004-12-27 | 2006-07-13 | Asahi Techno Glass Corp | Filter glass for cutting near-infrared ray |
| US20230286852A1 (en) * | 2022-03-09 | 2023-09-14 | Schott Ag | Filter glass |
-
2024
- 2024-02-02 CN CN202410146187.XA patent/CN117687138A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3806349A (en) * | 1969-05-28 | 1974-04-23 | Hoya Glass Works Ltd | Cds,se containing infrared transmitting zinc silicate glass |
| US3785722A (en) * | 1972-06-20 | 1974-01-15 | Corning Glass Works | USE OF SiO{11 -NB{11 O{11 {11 AND/OR Ta{11 O{11 {11 GLASSES AS ULTRAVIOLET FILTERS |
| CN1340035A (en) * | 1999-02-12 | 2002-03-13 | 康宁股份有限公司 | Colourless inorganic glasses with a sharp optical absorption cut off between 370 and 425 nm, products from said glasses |
| CN1406894A (en) * | 2001-08-22 | 2003-04-02 | 舱壁玻璃公司 | Color optical glass and use thereof and sharp cutoff optical filter |
| CN1406895A (en) * | 2001-08-22 | 2003-04-02 | 舱壁玻璃公司 | Color optical glass and its use and optical sharp cutoff filter |
| JP2006182584A (en) * | 2004-12-27 | 2006-07-13 | Asahi Techno Glass Corp | Filter glass for cutting near-infrared ray |
| US20230286852A1 (en) * | 2022-03-09 | 2023-09-14 | Schott Ag | Filter glass |
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