US20230322609A1 - Near-infrared absorbing glass and near-infrared cut filter - Google Patents

Near-infrared absorbing glass and near-infrared cut filter Download PDF

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Publication number
US20230322609A1
US20230322609A1 US18/013,977 US202118013977A US2023322609A1 US 20230322609 A1 US20230322609 A1 US 20230322609A1 US 202118013977 A US202118013977 A US 202118013977A US 2023322609 A1 US2023322609 A1 US 2023322609A1
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content
glass
wavelength
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US18/013,977
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English (en)
Inventor
Yuki Shiota
Masashi Kaneko
Koichi Sato
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Hoya Corp
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Hoya Corp
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Assigned to HOYA CORPORATION reassignment HOYA CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SATO, KOICHI, KANEKO, MASASHI, SHIOTA, YUKI
Publication of US20230322609A1 publication Critical patent/US20230322609A1/en
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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
    • C03C4/08—Compositions for glass with special properties for glass selectively absorbing radiation of specified wave lengths
    • 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
    • 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
    • C03C3/19—Silica-free oxide glass compositions containing phosphorus containing boron
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/226—Glass filters

Definitions

  • a near-infrared absorbing glass which exhibits excellent transmittance of light in the visible region (the violet region to the red region) and near-infrared cutting performance even if the thickness of the glass is reduced and which can suppress a decrease in weathering resistance.
  • a near-infrared cut filter comprised of the above near-infrared absorbing glass.
  • the term “near-infrared absorbing glass” means a glass having the property of absorbing at least light in all or part of the near-infrared wavelength region (wavelengths of 700 to 1200 nm).
  • the near-infrared absorbing glass according to one aspect of the present invention can be an oxide glass because the glass contains O ions as constituent ions.
  • An oxide glass is a glass in which the main network-forming components of the glass are oxides.
  • the near-infrared absorbing glass according to one aspect of the present invention can be a phosphate glass because the glass contains O ions (anions) and P ions (cations) as constituent ions.
  • O ions are anions of oxygen atoms, and are commonly referred to as oxide ions.
  • the valency of Cu is +2 in order for O 2 ⁇ and Cu contained in the chemical formula of the oxide CuO to be electrically neutral.
  • the above glass contains at least O ions as anions, and the content thereof is 90.0 anion % or more in the glass composition indicated by anion %.
  • the present inventors considered that if the O/P ratio is lowered in a glass containing mainly O ions as anions as described above, absorption by CuO in the red region can be shifted to the long wavelength side, and it is therefore possible to increase the content of CuO and improve near-infrared cutting performance without lowering the transmittance of light in the red region.
  • the content of O ions in the glass composition if expressed in terms of anion %, is 90.0% or more, preferably 95.0% or more, more preferably 98.0% or more, and further preferably 99.0% or more.
  • O(P) denotes the amount of oxygen that constitutes the oxide of P ions in the oxide-based glass composition
  • O(others) denotes the amount of oxygen determined by subtracting the value of O(P) from the amount of oxygen that constitutes the oxides of the main cations already mentioned in Glass 3 in the oxide-based glass composition
  • Cu denotes the content of CuO on a molar basis in the oxide-based glass composition.
  • the content of CuO in the oxide-based glass composition is preferably 10.0% or more, and is more preferably 10.5% or more, 11.0% or more, 11.5% or more, 12.0% or more, 12.5% or more, 13.0% or more, 13.5% or more, 14.0% or more, 14.5% or more, 15.0% or more, 15.5% or more, 16.0% or more, 16.5% or more, 17.0% or more, 17.5% or more, 18.0% or more, 18.5% or more, 19.0% or more, 19.5% or more, or 20.0% or more in that order.
  • the total content (Al 2 O 3 +La 2 O 3 +Y 2 O 3 +Gd 2 O 3 ) is preferably 8.0% or less, and is more preferably 7.0% or less, 6.5% or less, 6.0% or less, 5.5% or less, 5.0% or less, 4.5% or less, 4.0% or less, 3.5% or less, 3.0% or less, 2.5% or less, 2.0% or less, 1.5% or less or 1.0% or less in that order.
  • the total content of MgO, CaO, SrO and BaO, which are oxides of cations having a nominal valency of +2 is preferably such that the molar ratio relative to the content of Li 2 O ((MgO+CaO+SrO+BaO)/Li 2 O), which is an oxide of Li ions, which are essential cations, is 2.0 or less, and is more preferably 1.5 or less, 1.3 or less, 1.2 or less, 1.1 or less, 1.0 or less, 0.9 or less, 0.8 or less, 0.7 or less, 0.6 or less, 0.5 or less, 0.4 or less, 0.3 or less or 0.2 or less.
  • the components mentioned above are optional components that can be used together with some alkali components in order to adjust the half value.
  • the total content of Na 2 O, K 2 O and ZnO is preferably 30.0% or less, and is more preferably 25.0% or less, 20.0% or less, 15.0% or less, 12.0% or less, 10.0% or less, 9.0% or less, 8.0% or less, 7.0% or less, 6.0% or less, 5.0% or less, 4.0% or less, 3.0% or less, 2.0% or less, or 1.0% or less in that order.
  • the expression “(3 ⁇ Al 2 O 3 +Y 2 O 3 +La 2 O 3 +Gd 2 O 3 +BaO/3+(CaO+SrO)/6)” is the sum of a value calculated by multiplying the content of Al 2 O 3 by 3, the content of Y 2 O 3 , the content of La 2 O 3 , the content of Gd 2 O 3 , a value calculated by dividing the content of BaO by 3, and a value calculated by dividing the sum of the content of CaO and the content of SrO by 6, and units for the thus calculated value are % (mol %).
  • the content of CeO 2 is also expressed as an outer percentage. That is, if the total content as oxides of all glass components other than CeO 2 , Sb 2 O 3 , SnO 2 and SO 3 is taken to be 100.0 mass %, the content of CeO 2 is preferably less than 2.0 mass % or less than 1.0 mass %, and is more preferably 0.9 mass % or less, 0.8 mass % or less, 0.7 mass % or less, 0.6 mass % or less, 0.5 mass % or less, 0.4 mass % or less, 0.3 mass % or less, 0.2 mass % or less or less than 0.1 mass % in that order.
  • the content of CeO 2 may be 0 mass %. If the content of CeO 2 falls within the range mentioned above, it is possible to improve the clarity of the glass.
  • the above glass is suitable for use as a glass for a near-infrared cut filter.
  • transmittance means external transmittance including reflection losses, unless explicitly indicated otherwise.
  • the above near-infrared cut filter can exhibit both excellent near-infrared cutting performance and high transmittance of light in the visible region. According to this near-infrared cut filter, the color sensitivity of a semiconductor image element can be favorably corrected.
  • Example 1 1.45 0.00 306.788 42.994 263.794 6941.68 1688.85 6.40 20.58 22.37 1.5 1.14
  • Example 2 3.69 0.00 295.806 43.795 252.011 6754.81 1690.23 6.73 19.45 21.14 2.10 1.70
  • Example 3 1.50 0.00 300.1
  • Example 21 1.65 0.00 281.176 48.694 232.482 6928.89 1789.47 7.70 16.25 17.67 3.68 3.3
  • Example 22 2.40 0.00 281.176 48.694 232.482 6928.69 1798.6 7.74 16.2 17.67 3.72 3.37
  • Example 23 4.04 0.00 276.631 47.908 298.724 5581.61 1464.50 6.40 16.25 17.67 2.39 2.04
  • Example 24 4.04 0.00 276.631 47.908 228.724 6706.50 1763.95 7.71 16.25 17.67 3.70 3.35
  • Example 25 1.65 0.00 281.176 48.700 232.475 4984.27 1258.45 5.41 16.25 17.67 1.40 1.05
  • Example 26 1.65 0.00 281.176 48.700 232.475 5226.04 1323.27 5.69 16.25 17.67 1.68 1.33
  • Example 27 1.65 0.00 281.176 48.703 232.473 4826.13 123 .69 5.03 16.25 17.66 1.32 0.
  • Example 54 1.65 0.00 281.176 48.694 232.482 6323.59 2161.474 9.30 1 .25 17.67 5.28 4.9
  • Example 55 1.65 0.00 281.176 48.694 232.482 9021.03 2327.952 10.01 1 .25 17.67 6.00 5.65
  • Example 56 5.44 0.585 268.282 54.313 213.989 3029.4 28 .50 3.59 13.19 14.34 0.10 ⁇ 0.10
  • Example 57 4.35 1.179 264.610 53.447 211.103 3005.00 750.39 3.55 13.23 14.39 0.15 ⁇ 0.15
  • Example 58 3.24 2.1 7 260.892 52.570 208.322 2 0.18 732.77 .52 13.2 14.43 0.101 ⁇ 0.20
  • Example 59 7.05 0.00 267.943 46.411 221.532 5236.32 1411.74 6.37 16.25 17.66 2.3 2.01
  • Example 60 0.00 1.47 267.941 46.412 221.529 5236.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Glass Compositions (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Optical Filters (AREA)
US18/013,977 2020-07-10 2021-05-31 Near-infrared absorbing glass and near-infrared cut filter Pending US20230322609A1 (en)

Applications Claiming Priority (3)

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JP2020-119553 2020-07-10
JP2020119553 2020-07-10
PCT/JP2021/020579 WO2022009558A1 (ja) 2020-07-10 2021-05-31 近赤外線吸収ガラスおよび近赤外線カットフィルタ

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JP (2) JP7610603B2 (https=)
KR (2) KR102786048B1 (https=)
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JPWO2024106186A1 (https=) * 2022-11-18 2024-05-23
CN115598823B (zh) * 2022-12-12 2023-05-23 中国科学院长春光学精密机械与物理研究所 太阳空间望远镜的对日滤光镜组件及其热分析方法

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US20250320151A1 (en) 2025-10-16
CN115803295A (zh) 2023-03-14
CN120097627A (zh) 2025-06-06
JP2025038189A (ja) 2025-03-18
CN115803295B (zh) 2025-03-11
JPWO2022009558A1 (https=) 2022-01-13
JP7610603B2 (ja) 2025-01-08
WO2022009558A1 (ja) 2022-01-13
KR20250039510A (ko) 2025-03-20
KR102786048B1 (ko) 2025-03-24
KR20230022221A (ko) 2023-02-14
TW202206391A (zh) 2022-02-16

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