WO2023189365A1 - 近赤外線カットフィルタ - Google Patents

近赤外線カットフィルタ Download PDF

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Publication number
WO2023189365A1
WO2023189365A1 PCT/JP2023/009108 JP2023009108W WO2023189365A1 WO 2023189365 A1 WO2023189365 A1 WO 2023189365A1 JP 2023009108 W JP2023009108 W JP 2023009108W WO 2023189365 A1 WO2023189365 A1 WO 2023189365A1
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WO
WIPO (PCT)
Prior art keywords
wavelength
infrared cut
cut filter
resin layer
glass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/009108
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English (en)
French (fr)
Japanese (ja)
Inventor
達也 藤井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoya Corp
Original Assignee
Hoya Corp
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Filing date
Publication date
Application filed by Hoya Corp filed Critical Hoya Corp
Priority to EP23779391.4A priority Critical patent/EP4502671A4/en
Publication of WO2023189365A1 publication Critical patent/WO2023189365A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/06—Joining glass to glass by processes other than fusing
    • C03C27/10—Joining glass to glass by processes other than fusing with the aid of adhesive specially adapted for that purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10082—Properties of the bulk of a glass sheet
    • B32B17/1011—Properties of the bulk of a glass sheet having predetermined tint or excitation purity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10082—Properties of the bulk of a glass sheet
    • B32B17/10119—Properties of the bulk of a glass sheet having a composition deviating from the basic composition of soda-lime glass, e.g. borosilicate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/1044—Invariable transmission
    • B32B17/10449—Wavelength selective transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10614—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising particles for purposes other than dyeing
    • B32B17/10633—Infrared radiation absorbing or reflecting agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10651—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising colorants, e.g. dyes or pigments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10706—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer being photo-polymerized
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
    • 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
    • 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
    • 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
    • G02B5/226—Glass filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10678—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising UV absorbers or stabilizers, e.g. antioxidants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10733—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing epoxy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10743—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing acrylate (co)polymers or salts thereof
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Definitions

  • the present invention relates to a near-infrared cut filter.
  • an inorganic film as a dielectric material is deposited on the surface of a transparent substrate, and among incident light, ultraviolet light and near-infrared light are selectively reflected by a reflective film, and near-infrared light is transmitted, allowing only visible light to pass through. Cut filters are known.
  • Patent Document 1 discloses an invention related to a near-infrared cut filter in which a resin layer that absorbs a specific wavelength is formed on the surface of a transparent base material made of glass.
  • Patent Document 1 it is possible to create a cut filter that transmits light in the visible light range without using a reflective film, but it sharply cuts both light in the longer wavelength range and shorter wavelength range, and There was a need for a cut filter that could extract only light.
  • the present invention has been made in view of these circumstances, and is directed to near-infrared rays that steeply absorbs light in both the long and short wavelength ranges and selectively transmits light in the visible light range.
  • the purpose is to provide a cut filter.
  • the near-infrared cut filter of the present invention includes a first glass base material that absorbs at least light in a wavelength range longer than the visible light range, and a second glass base material that absorbs at least light in a wavelength range shorter than the visible light range. and a resin layer that is interposed between the first glass base material and the second glass base material and absorbs light of a specific wavelength.
  • the resin layer determines the half-value wavelength on the long wavelength side of the transmittance curve of the near-infrared cut filter
  • the second glass substrate determines the half-value wavelength on the long wavelength side of the transmittance curve of the near-infrared cut filter. It is preferable to determine the half-value wavelength of the side.
  • the present invention it is possible to steeply absorb light in both the long wavelength range and the short wavelength range, and selectively transmit light in the visible light range. Furthermore, by sandwiching both sides of the resin layer containing the dye between glass substrates, it is possible to block the resin layer from the atmosphere and improve weather resistance.
  • FIG. 1 is a schematic cross-sectional view of a near-infrared cut filter in this embodiment.
  • FIG. 2 is a graph showing spectral transmittance curves of the glass substrate, the resin layer, and the near-infrared cut filter used in the near-infrared cut filter of this embodiment.
  • FIG. 3 is a graph showing a spectral transmittance curve of a glass substrate, a resin layer, and a near-infrared cut filter used in a near-infrared cut filter according to another embodiment.
  • FIG. 1 is a schematic cross-sectional view of a near-infrared cut filter 1 in this embodiment.
  • the near-infrared cut filter 1 includes a first glass base material 2, a resin layer 3, and a second glass base material 4.
  • the first glass substrate 2 is formed in close contact with one main surface of the resin layer 3, and the second glass substrate 4 is formed in close contact with the other main surface of the resin layer 3. be done. It is possible to interpose a light absorption layer or the like different from the resin layer 3 between the first glass base material 2 and the resin layer 3 and between the second glass base material 4 and the resin layer 3. However, in particular, it is possible to directly bring the first glass base material 2 and the resin layer 3 into close contact with each other, and directly bring the second glass base material 4 and the resin layer 3 into close contact with each other without providing another light absorption layer. can.
  • the near-infrared cut filter 1 shown in FIG. 1 has, for example, a rectangular plate-like or circular appearance, but the shape is not particularly limited.
  • the first glass substrate 2 absorbs at least light in a wavelength range longer than the visible light range. "Absorbing light in a long wavelength range” has a characteristic that the spectral transmission curve falls on the long wavelength side beyond the visible light range.
  • the half-value wavelength (NIR_ ⁇ 50) on the longer wavelength side of the transmittance curve in the first glass substrate 2 is preferably in the range of 650 to 800 nm, more preferably in the range of 670 to 770 nm, and more preferably in the range of 670 to 750 nm. More preferably, it is within the range.
  • the "half-value wavelength on the long wavelength side (NIR_ ⁇ 50)" refers to the wavelength at which the transmittance becomes 50% at the falling edge of the transmittance curve.
  • the first glass substrate 2 has a spectral transmittance of 800 nm or more of 25% or less, a spectral transmittance of 850 nm or more of 15% or less, and a spectral transmittance of 900 nm or more. It is preferable that the ratio is 10% or less.
  • the short wavelength side of the spectral transmittance curve of the first glass substrate 2 is not particularly specified, it is preferable to transmit ultraviolet rays (particularly long wavelength ultraviolet rays), for example, the half-value wavelength on the short wavelength side.
  • UV_ ⁇ 50 is preferably in the range of 300 to 360 nm, more preferably in the range of 310 to 350 nm, even more preferably in the range of 320 to 340 nm.
  • the "half-value wavelength on the short wavelength side (UV_ ⁇ 50)" refers to the wavelength at which the transmittance becomes 50% at the rising edge of the spectral transmittance curve.
  • the first glass substrate 2 is an absorption glass substrate made of phosphate glass.
  • the thickness of the first glass substrate 2 is not particularly limited, but is preferably in the range of 0.01 to 3.00 mm, more preferably 0.01 to 2.00 mm, and more preferably 0.01 to 1.50 mm. is even more preferable.
  • the phosphate glass is a glass containing P and O as essential components and other optional components, and those containing Fe 2 O 3 are particularly preferable. When the phosphate glass contains Fe 2 O 3 , near-infrared light can be absorbed more effectively.
  • examples of other optional components of the phosphate glass include Ca, Mg, Sr, Ba, Li, Na, K, and Cs.
  • the specific composition of the phosphate glass is P 2 O 5 : 30-75% by mass, Al 2 O 3 : 1-20% by mass, RO: 1-10% by mass, Fe 2 O 3 : 0 More preferably, it contains .5 to 25% by mass.
  • the first glass substrate 2 may be a fluorophosphate glass.
  • FIG. 2 shows a spectral transmittance curve of a phosphate-based glass (model number HA50: manufactured by HOYA Corporation) as the first glass substrate 2. As shown in FIG. 2, it can be seen that it absorbs infrared rays (wavelengths of 780 nm or more) and has high transmittance in the visible light range of about 410 nm to 600 nm.
  • the transmittance of phosphate glass gradually begins to decrease when the wavelength exceeds about 600 nm, and the transmittance drops below 10% at about 900 nm. As described above, there is a tendency for the transmittance to gradually decrease between wavelengths of 600 nm to 900 nm. On the other hand, it can be seen that some wavelengths of ultraviolet rays also have high transmittance on the short wavelength side.
  • the second glass substrate 4 absorbs at least light in a wavelength range shorter than the visible light range. "Absorbing light in a short wavelength range” has the property that a spectral transmission curve rises on the shorter wavelength side than the visible light range.
  • the half-value wavelength (UV_ ⁇ 50) of the transmittance curve in the second glass base material 4 is preferably in the range of 380 to 430 nm, more preferably in the range of 390 to 420 nm, and more preferably in the range of 400 to 420 nm. It is even more preferable.
  • “Half-value wavelength (UV_ ⁇ 50)” refers to the wavelength at which the transmittance becomes 50% at the rising edge of the transmittance curve.
  • the wavelength gradient width defined by the interval between the wavelength value at which the spectral transmittance is 72% and the wavelength value at 5% is 50 nm or less, preferably 30 nm or less, and more preferably 20 nm or less, Even more preferably it is 10 nm or less.
  • the transmittance curve of the second glass substrate 4 draws a curve that rises steeply on the short wavelength side.
  • the rise of the transmittance curve of the second glass base material 4 changes more steeply than the fall of the transmittance curve of the first glass base material 2.
  • the second glass substrate 4 is called a sharp cut filter.
  • the thickness of the second glass base material 4 is not particularly limited, but preferably ranges from 0.01 to 3.00 mm, more preferably from 0.01 to 2.00 mm, and from 0.01 to 1.50 mm. is even more preferable.
  • the second glass substrate 4 contains, for example, SiO 2 , Al 2 O 3 , Li 2 O, Na 2 O, K 2 O, CeO 2 , TiO 2 and the like.
  • SiO 2 is a basic component of glass and is an important component for the thermal stability and chemical durability of glass.
  • the content of SiO 2 is preferably 50 to 70%, more preferably 55 to 65%.
  • Al 2 O 3 is an effective component for suppressing phase separation and devitrification of glass, and the content of Al 2 O 3 is preferably 0 to 5%, more preferably 0 to 2%.
  • Li 2 O is a component that improves the meltability of glass, and the content of Li 2 O is preferably 0 to 10%, more preferably 0 to 5%.
  • Na 2 O is a component that improves the meltability of glass, and the content of Na 2 O is preferably 0 to 20%, more preferably 5 to 15%.
  • K 2 O is a component that improves the meltability of glass, and the content of K 2 O is preferably 0 to 20%, more preferably 5 to 15%.
  • the total content of Li 2 O+Na 2 O+K 2 O is preferably 10 to 30%, more preferably 15 to 25%.
  • RO MgO, CaO, SrO, BaO, ZnO
  • the total RO content is preferably 5-20%, more preferably 13-18%.
  • CeO 2 is an essential component for absorbing ultraviolet light.
  • the content of CeO 2 is preferably 1 to 5%, more preferably 1.0 to 3%.
  • TiO 2 is an effective component for preventing UV deterioration when combined with CeO 2 .
  • the content of TiO 2 is preferably 0 to 5%, more preferably 1.0 to 3%.
  • FIG. 2 shows a spectral transmittance curve of a sharp cut filter glass (model number L42: manufactured by HOYA Corporation) as the second glass substrate 4. As shown in FIG. 2, it can be seen that the sharp cut filter glass (model number L42) absorbs ultraviolet rays and transmits light with longer wavelengths.
  • a sharp cut filter glass model number L42: manufactured by HOYA Corporation
  • the spectral transmittance of sharp-cut filter glass rises steeply at wavelengths of about 410 nm to 420 nm. Therefore, the wavelength tilt width is extremely narrow, and the wavelength tilt width is about 10 nm or less.
  • the resin layer 3 is interposed between the first glass base material 2 and the second glass base material 4, and absorbs light of a specific wavelength.
  • the resin layer 3 is a layer composed of a dye and resin that absorbs light of a specific wavelength.
  • the resin layer 3 contains, for example, a near-infrared absorbing dye and a transparent resin, and is preferably formed by uniformly dissolving or dispersing the dye in the transparent resin.
  • the thickness of the resin layer 3 is not particularly limited, but is approximately several ⁇ m, which is sufficiently thinner than that of the first glass base material 2 and the second glass base material 4.
  • Examples of near-infrared absorbing dyes constituting the resin layer 3 include cyanine dyes, polymethine dyes, squarylium dyes, porphyrin dyes, metal dithiol complex dyes, phthalocyanine dyes, diimonium dyes, and inorganic oxide particles.
  • cyanine dyes polymethine dyes, squarylium dyes, porphyrin dyes, metal dithiol complex dyes, phthalocyanine dyes, diimonium dyes, and inorganic oxide particles.
  • One or more selected ones can be used, and among these, one or more selected from squarylium dyes, cyanine dyes, and phthalocyanine dyes are more preferable.
  • an adhesive for bonding glass substrates can be used, and preferably a UV curing adhesive.
  • a crosslinked structure is formed by a reaction between oligomers and monomers having polymerization ability, such as vinyl groups, acryloyl groups, and epoxy groups, using radicals and cations generated by ultraviolet irradiation as initiating species.
  • the resin layer 3 contains a polymerizable oligomer, a polymerizable monomer, a photopolymerization initiator, and various additives.
  • the materials of the polymerizable oligomer, polymerizable monomer, and photopolymerization initiator differ depending on photoradical polymerization or photocationic polymerization.
  • photo-radical polymerization it is preferable to use an acrylic resin, and in the case of photo-cationic polymerization, it is preferable to use an epoxy resin.
  • polyester acrylate, urethane acrylate, etc. can be used as the polymerizable oligomer, acrylate monomer, etc.
  • polymerizable monomer can be used as the polymerizable monomer, and benzophenone type, acetophenone type, etc. can be used as the photopolymerization initiator.
  • photo-cationic polymerization alicyclic epoxy or glycidyl-type epoxy is used as a polymerizable oligomer, a vinyl ether monomer is used as a polymerizable monomer, and a sulfonium salt type or iodonium salt type is used as a photopolymerization initiator. Can be used.
  • color tone correction dyes in addition to the above-mentioned near-infrared absorbing dyes and transparent resins, color tone correction dyes, leveling agents, antistatic agents, heat stabilizers, light stabilizers, and antioxidants may be added to the extent that the effects of the present invention are not impaired.
  • a dispersant, a flame retardant, a lubricant, a plasticizer, and other optional components may be contained.
  • the other glass base material is bonded and ultraviolet rays are irradiated. do.
  • a thermosetting resin formed by dehydration condensation dehydration condensation does not occur properly even if the resin layer 3 is thermally cured with the glass substrates 2 and 4 sandwiched between both sides, and the resin layer 3 and each glass substrate 2, 4 cannot be effectively bonded. Therefore, in this embodiment, a UV-curable resin is used as the resin layer 3, and the glass substrates 2 and 4 are placed on both sides of the resin layer 3, and UV-curing is performed. Since the second glass substrate 4 absorbs ultraviolet rays, it is preferable to irradiate the ultraviolet rays from the first glass substrate 2 side to UV-cure the resin layer 3.
  • the resin layer 3 is a layer configured to absorb light of a specific wavelength, and by setting the absorption wavelength according to the spectral transmittance characteristics of each glass substrate 2, 4. , it is possible to extract light in the desired visible light range.
  • the resin layer 3 may contain a near-infrared absorbing dye having a maximum absorption wavelength of 650 to 760 nm. Further, the resin layer 3 can further include a near-infrared absorbing dye having a maximum absorption wavelength in a range of 800 to 1200 nm.
  • the resin layer shown in FIG. 2 contains a near-infrared absorbing dye having a maximum absorption wavelength of 650 to 760 nm, and when the wavelength exceeds about 600 nm, the transmittance becomes steeper than that of the first glass substrate 2. You can see it start to go down.
  • the rise of the transmittance curve of the near-infrared cut filter 1 can be determined by the half-value wavelength on the short wavelength side of the spectral transmittance curve of the second glass substrate 4, but the rise of the spectral transmittance of the near-infrared cut filter 1
  • the half-value wavelength on the long wavelength side of the transmittance curve of the near-infrared cut filter 1 was determined in the resin layer 3. That is, the resin layer 3 includes at least a near-infrared absorbing dye, so that the fall of the transmittance curve of the near-infrared cut filter 1 is made steeper than the fall of the spectral transmittance of the first glass substrate 2. I adjusted it so that
  • the half-value wavelength on the long wavelength side of the transmittance curve of the near-infrared cut filter 1 is set in the vicinity of 600 nm to 700 nm.
  • the fall of the spectral transmittance of the near-infrared cut filter 1 can be made steeper than the fall of the spectral transmittance of the first glass substrate 2.
  • the extent to which the near-infrared absorbing dye having the maximum absorption wavelength is included in the resin layer 3 can be variously adjusted by setting the fall of the spectral transmittance in which wavelength range.
  • the spectral transmittance curve is at the half-value wavelength on the short wavelength side of the transmittance curve.
  • UV_ ⁇ 50 is 380 to 430 nm
  • the half-value wavelength on the long wavelength side (NIR_ ⁇ 50) is 600 to 700 nm
  • the visible light range (within the range of 420 nm to 650 nm) can be selectively transmitted with high precision. It becomes possible to have characteristics close to .
  • FIG. 2 shows a near-infrared cut filter 1 (L42/resin layer/HA50) having a three-layer structure of second glass base material 4 (L42)/resin layer 3/first glass base material 2 (HA50).
  • a spectral transmittance curve is illustrated. As shown in Figure 2, it has excellent transmittance in the visible light range (within the range of approximately 420 nm to 600 nm), and has a steep change in transmittance in both the short and long wavelength ranges on both sides of the visible light range. can be seen. As is clear from FIG.
  • the second glass substrate 4 (L42) determines the half-value wavelength (UV_ ⁇ 50) on the shorter wavelength side of the transmittance curve in the near-infrared cut filter 1, and the resin layer It can be seen that the half-value wavelength (NIR_ ⁇ 50) on the longer wavelength side of the transmittance curve of No. 1 is determined (controlled).
  • the application of the near-infrared cut filter 1 of this embodiment is not limited, it can be used, for example, in imaging devices, automobile-related (windshield glass, etc.), architectural glass, and the like.
  • the imaging device using the near-infrared cut filter 1 of this embodiment can obtain images with excellent color reproducibility because the occurrence of ghosts is suppressed.
  • the near-infrared cut filter of the present invention can be a near-infrared cut filter that absorbs light in both the long wavelength range and the short wavelength range more steeply and selectively transmits light in the visible light range.
  • the near-infrared cut filter of this embodiment can be preferably applied to an imaging device, etc., and can exhibit characteristics close to human visibility.

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PCT/JP2023/009108 2022-03-31 2023-03-09 近赤外線カットフィルタ Ceased WO2023189365A1 (ja)

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WO2007020792A1 (ja) * 2005-08-16 2007-02-22 Asahi Glass Company, Limited 赤外線反射ガラス板および車両窓用合わせガラス
JP2016222507A (ja) * 2015-06-01 2016-12-28 コニカミノルタ株式会社 合わせガラス用中間膜、それを用いた合わせガラスおよびその製造方法
WO2017155066A1 (ja) * 2016-03-11 2017-09-14 日本板硝子株式会社 ウインドシールド
WO2018173386A1 (ja) * 2017-03-22 2018-09-27 日本板硝子株式会社 紫外線及び赤外線吸収性組成物並びに紫外線及び赤外線吸収フィルタ
WO2018221359A1 (ja) * 2017-05-30 2018-12-06 Ａｇｃ株式会社 波長選択透過性ガラス物品
JP2021015269A (ja) 2019-07-11 2021-02-12 Hoya株式会社 近赤外線カットフィルタ及びそれを備える撮像装置
JP2021014400A (ja) * 2014-05-08 2021-02-12 日本板硝子株式会社 ウインドシールド
JP2022059699A (ja) 2020-10-02 2022-04-14 信越化学工業株式会社 ６－ヒドロキシ－３－ヘキセニル＝アルコキシメチル＝エーテル化合物及びそれを用いた３，１３－オクタデカジエン－１－オール化合物の製造方法

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JP2005075677A (ja) * 2003-08-29 2005-03-24 Hoya Corp シャープカットフィルター用ガラスおよびシャープカットフィルター
WO2007020792A1 (ja) * 2005-08-16 2007-02-22 Asahi Glass Company, Limited 赤外線反射ガラス板および車両窓用合わせガラス
JP2021014400A (ja) * 2014-05-08 2021-02-12 日本板硝子株式会社 ウインドシールド
JP2016222507A (ja) * 2015-06-01 2016-12-28 コニカミノルタ株式会社 合わせガラス用中間膜、それを用いた合わせガラスおよびその製造方法
WO2017155066A1 (ja) * 2016-03-11 2017-09-14 日本板硝子株式会社 ウインドシールド
WO2018173386A1 (ja) * 2017-03-22 2018-09-27 日本板硝子株式会社 紫外線及び赤外線吸収性組成物並びに紫外線及び赤外線吸収フィルタ
WO2018221359A1 (ja) * 2017-05-30 2018-12-06 Ａｇｃ株式会社 波長選択透過性ガラス物品
JP2021015269A (ja) 2019-07-11 2021-02-12 Hoya株式会社 近赤外線カットフィルタ及びそれを備える撮像装置
JP2022059699A (ja) 2020-10-02 2022-04-14 信越化学工業株式会社 ６－ヒドロキシ－３－ヘキセニル＝アルコキシメチル＝エーテル化合物及びそれを用いた３，１３－オクタデカジエン－１－オール化合物の製造方法

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See also references of EP4502671A4

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