WO2018083941A1 - Composant de capuchon optique - Google Patents

Composant de capuchon optique Download PDF

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Publication number
WO2018083941A1
WO2018083941A1 PCT/JP2017/036375 JP2017036375W WO2018083941A1 WO 2018083941 A1 WO2018083941 A1 WO 2018083941A1 JP 2017036375 W JP2017036375 W JP 2017036375W WO 2018083941 A1 WO2018083941 A1 WO 2018083941A1
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WO
WIPO (PCT)
Prior art keywords
optical
cap component
glass
optical cap
component according
Prior art date
Application number
PCT/JP2017/036375
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English (en)
Japanese (ja)
Inventor
松下佳雅
佐藤史雄
Original Assignee
日本電気硝子株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP2017021009A external-priority patent/JP6788224B2/ja
Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Priority to CN201780067274.4A priority Critical patent/CN109923399B/zh
Priority to US16/342,003 priority patent/US20190248699A1/en
Publication of WO2018083941A1 publication Critical patent/WO2018083941A1/fr
Priority to US17/209,297 priority patent/US20210230046A1/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
    • C03C3/00—Glass compositions
    • C03C3/32—Non-oxide glass compositions, e.g. binary or ternary halides, sulfides or nitrides of germanium, selenium or tellurium
    • C03C3/321—Chalcogenide glasses, e.g. containing S, Se, Te
    • 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
    • C03C3/122—Silica-free oxide glass compositions containing oxides of As, Sb, Bi, Mo, W, V, Te as glass formers
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/06—Other methods of shaping glass by sintering, e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction
    • 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
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/001—General methods for coating; Devices therefor
    • 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
    • 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
    • C03C4/10—Compositions for glass with special properties for infrared transmitting 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
    • C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
    • C03C8/16—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions with vehicle or suspending agents, e.g. slip
    • 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
    • C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
    • C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
    • C03C8/20—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions containing titanium compounds; containing zirconium compounds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/113—Anti-reflection coatings using inorganic layer materials only
    • G02B1/115—Multilayers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/30—Collimators
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2204/00—Glasses, glazes or enamels with special properties
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/063—Illuminating optical parts
    • G01N2201/0638—Refractive parts
    • G01N2201/0639—Sphere lens

Definitions

  • the present invention relates to an optical cap component used for a gas sensor, a gas alarm, a gas concentration measuring device, and the like.
  • a metal case of a sleeve shape or a cap shape is attached to a light receiver, and an opening is formed on the upper surface thereof.
  • An external light transmissive window material is attached.
  • the window material sapphire, barium fluoride, silicon, germanium, or the like is used (for example, see Patent Document 1).
  • the present invention has been made in view of such a situation, and an object thereof is to provide an optical cap component capable of improving the sensitivity of an optical gas sensor using infrared light absorption.
  • An optical cap component of the present invention includes a window member made of a lens-shaped infrared light transmitting glass, and a cap member having a cylindrical side wall portion having openings on the distal end side and the proximal end side, and a window. The material is fixed so as to cover the opening on the tip side of the cap member.
  • Infrared light transmitting glass is more workable than crystalline materials such as sapphire, germanium, and silicon, and can be easily formed into a lens shape. By using the lens shape, it has an excellent light condensing capability, so that the sensitivity of the optical gas sensor using infrared light absorption can be improved.
  • the “infrared light transmitting glass” in the present invention means a glass having a thickness of 1 mm and a maximum transmittance of 30% or more in a wavelength range of 1 to 6 ⁇ m.
  • the infrared light transmitting glass is preferably tellurite glass. Quartz glass and borosilicate glass can only transmit infrared light up to a wavelength of about 3.0 ⁇ m, whereas tellurite glass can transmit up to about 6.0 ⁇ m and has excellent infrared transmission characteristics.
  • the tellurite-based glass has a composition of mol%, TeO 2 30 to 90%, ZnO 0 to 40%, RO (R is at least selected from Mg, Ca, Sr and Ba) 1 type) 0 to 30%, R ′ 2 O (R ′ is at least one selected from Li, Na and K) 0 to 30% are preferably contained.
  • the infrared light transmitting glass preferably has a maximum transmittance of 50% or more in a wavelength range of 1 to 6 ⁇ m with a thickness of 1 mm.
  • the infrared light transmitting glass preferably has a thermal expansion coefficient of 250 ⁇ 10 ⁇ 7 / ° C. or less in the range of 0 to 300 ° C. In this way, deformation due to temperature changes can be suppressed.
  • the window material is preferably fixed to the cap member with a bonding material.
  • the bonding material preferably contains 50 to 100% by volume of glass powder and 0 to 50% by volume of refractory filler powder.
  • the glass powder does not substantially contain PbO or halogen.
  • Halogen includes halides as well as fluorine, chlorine, bromine and iodine. Halides are fluoride, chloride, bromide, and iodide.
  • substantially no PbO and halogen means a case where the PbO and halogen contents in the glass composition are each 1000 ppm or less.
  • the optical cap component of the present invention preferably has an antireflection film formed on the surface of the window material. In this way, it is easy to improve the light transmittance in the infrared region.
  • the cap member has a thermal expansion coefficient of 250 ⁇ 10 ⁇ 7 / ° C. or less in the range of 0 to 300 ° C. In this way, deformation due to temperature changes can be suppressed.
  • the cap member includes an end wall portion connected to the tip of the side wall portion, and the opening portion is provided at the center of the end wall portion.
  • the ratio of the diameter of the opening of the end wall portion to the inner diameter of the side wall portion is preferably 10% or more.
  • the optical cap component of the present invention preferably has a flange portion extending radially outward on the base end side of the side wall portion.
  • the optical cap component of the present invention is preferably used for optical sensor applications.
  • an optical cap component that can improve the sensitivity of an optical gas sensor using infrared light absorption.
  • FIG. 2 is a schematic cross-sectional view of an optical cap component used in a simulation under condition 1.
  • FIG. 6 is a schematic cross-sectional view of an optical cap component used in a simulation under condition 2.
  • FIG. 1 is a schematic cross-sectional view showing an optical cap component according to a first embodiment of the present invention.
  • the optical cap component 1 includes a window member 2 made of a lens-shaped infrared light transmitting glass and a cap member 3.
  • a sensor light receiving unit 5 is provided immediately below the window member 2.
  • the cap member 3 includes a side wall portion 3c having openings at both ends. Specifically, the side wall 3c has a distal end and a proximal end, and an opening 3a is formed on the distal end side, and an opening 3b is formed on the proximal end side. Further, the side wall portion has a cylindrical shape having substantially the same inner diameter over the entire length, and the diameter of the opening on the distal end side and the proximal end side is substantially the same as the inner diameter of the side wall portion.
  • the window material 2 is fixed so as to cover the opening 3 a on the distal end side of the cap member 3.
  • the window material 2 As a method of fixing the window material 2 to the cap member 3, there is a method of applying a bonding material 4 such as low melting point glass, adhesive, or solder between the window material 2 and the cap member 3. Further, the window material 2 itself may be melted and fused to the cap member 3. Alternatively, when the thermal expansion coefficient of the cap member 3 is higher than the thermal expansion coefficient of the window material 2, the heat of the cap member 3 and the window material 2 is obtained by heating and cooling after the window material 2 is stored in the cap member 3. The window member 2 can be fixed by tightening the window member 2 with the cap member 3 depending on the difference in shrinkage rate.
  • a bonding material 4 such as low melting point glass, adhesive, or solder
  • the window material 2 has a lens shape. Therefore, it has excellent light collecting ability, enables the area reduction of the sensor light receiving portion and the accompanying element miniaturization, and improves the sensitivity of the sensor because the light receiving intensity is improved.
  • the lens shape is not particularly limited, but considering a light collecting ability, a biconvex shape (for example, a spherical shape), a plano-convex shape, and a meniscus shape are preferable.
  • Window material 2 is made of infrared light transmitting glass.
  • the infrared light transmitting glass is preferably a tellurite-based glass that easily has good light transmittance in the infrared region.
  • the tellurite-based glass has a composition of mol%, TeO 2 30 to 90%, ZnO 0 to 40%, RO (R is at least one selected from Mg, Ca, Sr and Ba) 0 to 30%, R It is preferable to contain 0-30% of ' 2 O (R' is at least one selected from Li, Na and K). The reason for limiting the glass composition range in this way will be described below. In the following description of the content of each component, “%” means “mol%” unless otherwise specified.
  • TeO 2 is a component that forms a glass skeleton. It also has the effect of lowering the glass transition point and increasing the refractive index. When the glass transition point is lowered, the pressability is improved. When the refractive index is increased, the focal length is shortened and the optical sensor or the like is easily reduced in size.
  • the content of TeO 2 is preferably 30 to 90%, 40 to 80%, particularly 50 to 70%. When the content of TeO 2 is too small, it is difficult to vitrify. On the other hand, when the content of TeO 2 is too large, the light transmittance in the visible region is lowered, and it may not be used in applications where the light transmittance in the visible region is required from the viewpoint of design properties and the like.
  • ZnO is a component that enhances thermal stability.
  • the content of ZnO is preferably 0 to 40%, 10 to 35%, particularly preferably 15 to 30%. When there is too much content of ZnO, it will become difficult to vitrify.
  • RO is at least one selected from Mg, Ca, Sr, and Ba
  • the RO content is preferably 0 to 30%, 1 to 25%, 2 to 20%, particularly preferably 3 to 15%. When there is too much content of RO, it will become difficult to vitrify.
  • the contents of MgO, CaO, SrO and BaO are preferably 0-30%, 1-25%, 2-20%, particularly 3-15%, respectively.
  • BaO has the highest effect of increasing the stability of vitrification. Therefore, vitrification becomes easy by positively containing BaO as RO.
  • R ′ 2 O (R ′ is at least one selected from Li, Na, and K) is a component that improves the light transmittance in the visible region.
  • the content of R ′ 2 O is preferably 0 to 30%, 1 to 25%, 2 to 20%, particularly 3 to 15%. When R 'content 2 O is too large, it tends to decrease the chemical durability.
  • Li 2 O, Na 2 O and K 2 O are preferably 0-30%, 1-25%, 2-20%, particularly 3-15%, respectively.
  • La 2 O 3 , Gd 2 O 3 and Y 2 O 3 are components that increase the stability of vitrification by lowering the liquidus temperature without reducing the light transmittance in the infrared region.
  • the content of La 2 O 3 + Gd 2 O 3 + Y 2 O 3 is preferably 0 to 50%, 1 to 30%, particularly 1 to 15%. When there is too much these content, it will become difficult to vitrify. Moreover, the glass transition point also rises, and the press moldability tends to be lowered.
  • La 2 O 3 has the highest effect of increasing the stability of vitrification. Therefore, vitrification becomes easy by positively containing La 2 O 3 .
  • La 2 O 3 + Gd 2 O 3 + Y 2 O 3 means the total content of La 2 O 3 , Gd 2 O 3 and Y 2 O 3 .
  • the contents of La 2 O 3 , Gd 2 O 3 and Y 2 O 3 are preferably 0 to 50%, 0 to 30%, particularly 0.5 to 15%, respectively.
  • the content is preferably less than 1% each, and substantially contained More preferably not.
  • Ce, Pr, Nd, Sm, Eu, Tb, Ho, Er, Tm, Dy, Cr, Mn, Fe, Co, Cu, V, Mo, and Bi have a large absorption in the visible range of about 400 to 800 nm. Therefore, by substantially not containing these components, it becomes easy to obtain a glass having high light transmittance over a wide visible range.
  • a glass having the above composition tends to have a maximum transmittance of 50% or more, 60% or more, particularly 70% or more in a wavelength range of 1 to 6 ⁇ m at a thickness of 1 mm.
  • the thermal expansion coefficient of the infrared light transmitting glass is in the range of 0 to 300 ° C., 250 ⁇ 10 ⁇ 7 / ° C. or less, 220 ⁇ 10 ⁇ 7 / ° C. or less, 200 ⁇ 10 ⁇ 7 / ° C. or less, 180 ⁇ 10 ⁇ It is preferably 7 / ° C. or less, particularly 160 ⁇ 10 ⁇ 7 / ° C. or less. If the thermal expansion coefficient is too large, it is likely to be deformed due to a temperature change, the condensing ability is lowered, and the sensor sensitivity may be lowered.
  • the lower limit of the thermal expansion coefficient is not particularly limited, but in reality, it is 50 ⁇ 10 ⁇ 7 / ° C. or higher.
  • the spherical aberration increases as the incident effective diameter increases and the incident angle on the window material 2 increases. If the focal length is the same, the higher the refractive index, the smaller the curvature of the window material 2 and the smaller the incident angle, and the smaller the spherical aberration.
  • the refractive index of the glass having the above composition is about 1.9 to about 2.1, which is higher than the refractive index of sapphire, quartz glass, borosilicate glass, about 1.5 to about 1.8. Spherical aberration tends to be small.
  • an antireflection film may be formed on the surface (light incident surface or light emitting surface) of the window material 2.
  • the structure of the antireflection film includes a multilayer film in which high refractive index layers and low refractive index layers are alternately laminated.
  • the material constituting the antireflection film include niobium oxide, titanium oxide, lanthanum oxide, tantalum oxide, yttrium oxide, gadolinium oxide, tungsten oxide, hafnium oxide, and aluminum oxide, magnesium fluoride, calcium fluoride, and the like.
  • examples thereof include nitrides such as fluoride and silicon nitride, silicon, germanium, and zinc sulfide.
  • a single layer film made of silicon oxide or the like can be used as the antireflection film.
  • Examples of the method for forming the antireflection film include vacuum deposition, ion plating, and sputtering.
  • the antireflection film may be formed after the window material 2 is fixed to the cap member 3, or after the antireflection film is formed on the window material 2, the window material 2 may be fixed to the cap member 3.
  • the antireflection film is likely to be peeled off in the fixing step, so the former is preferable.
  • Cap member 3 The material of the cap member 3 may be either metal or ceramic, but is preferably a metal such as Hastelloy (registered trademark), Inconel (registered trademark), or SUS in consideration of workability.
  • the thermal expansion coefficient of the cap member is 250 ⁇ 10 ⁇ 7 / ° C. or less at 0 to 300 ° C., 220 ⁇ 10 ⁇ 7 / ° C. or less, 200 ⁇ 10 ⁇ 7 / ° C. or less, 180 ⁇ 10 ⁇ 7 / ° C. or less, particularly 160 It is preferable that the temperature is 10 ⁇ 7 / ° C. or less. If the thermal expansion coefficient is too large, it is likely to be deformed due to a temperature change, the condensing ability is lowered, and the sensor sensitivity may be lowered.
  • the lower limit of the thermal expansion coefficient is not particularly limited, but in reality, it is 50 ⁇ 10 ⁇ 7 / ° C. or higher.
  • the bonding material 4 is preferably made of glass rather than resin.
  • the glass used for the bonding material silver oxide glass, phosphate glass, bismuth oxide glass, silver phosphate glass, or the like can be used.
  • silver phosphate glass has a low softening point and can be sealed at a lower temperature, it is suitable for sealing window materials that are susceptible to heat, such as tellurite glass.
  • PbO and a halogen are harmful
  • the bonding material 4 may contain a refractory filler in order to improve the mechanical strength or adjust the thermal expansion coefficient of the glass powder made of the glass.
  • the mixing ratio is 50 to 100% by volume of glass powder and 0 to 50% by volume of refractory filler, more preferably 70 to 99% by volume of glass powder and 1 to 30% by volume of refractory filler, and 80 to 95 volume of glass powder. %, More preferably 5 to 20% by volume of a refractory filler.
  • the refractory filler is not particularly limited, and various materials can be selected, but those that do not easily react with the glass powder are preferable.
  • titania, quartz glass, ⁇ -eucryptite, ⁇ -quartz, willemite, cordierite, NaZr 2 (PO 4 ) 3 type solid solution such as Sr 0.5 Zr 2 (PO 4 ) 3 can be used.
  • These refractory fillers may be used alone or in combination of two or more. Note that it is preferable to use a refractory filler having an average particle diameter D50 of about 0.2 to 20 ⁇ m.
  • the glass transition point of the bonding material 4 is preferably 300 ° C. or less, particularly preferably 250 ° C. or less. Furthermore, the softening point is preferably 350 ° C. or lower, particularly 310 ° C. or lower. If the glass transition point and the softening point are too high, the firing temperature (sealing temperature) increases, and the window material 2 may be deformed or deteriorated during firing.
  • the lower limits of the glass transition point and the softening point are not particularly limited, but in reality, the glass transition point is 130 ° C. or higher and the softening point is 180 ° C. or higher.
  • the thermal expansion coefficient of the bonding material 4 in the range of 30 to 150 ° C. is preferably 250 ⁇ 10 ⁇ 7 / ° C. or less, 230 ⁇ 10 ⁇ 7 / ° C. or less, particularly 200 ⁇ 10 ⁇ 7 / ° C. or less.
  • the lower limit of the thermal expansion coefficient is not particularly limited, but in reality, it is 50 ⁇ 10 ⁇ 7 / ° C. or higher.
  • the raw material powder prepared to have a desired composition is melted at about 700 to 1600 ° C. for about 1 to 2 hours until a homogeneous glass is obtained.
  • the molten glass is formed into a film or the like, it is pulverized and classified to produce glass powder.
  • the average particle diameter D50 of the glass powder is preferably about 2 to 20 ⁇ m. If necessary, various refractory filler powders are added to the glass powder. In this way, the bonding material 4 is obtained.
  • the bonding material 4 can be used, for example, in the form of a sintered body (tablet) having a desired shape as described below.
  • an organic resin or an organic solvent is added to glass powder (or a mixed powder of glass powder and refractory filler powder) to form a slurry. Thereafter, this slurry is put into a granulator such as a spray dryer to produce granules. At that time, the granules are heat-treated at a temperature at which the organic solvent volatilizes (about 100 to 200 ° C.). Furthermore, the produced granule is put into a mold designed to have a predetermined size, and is dry press-molded into a ring shape to produce a pressed body.
  • the binder remaining in the press body is decomposed and volatilized in a heat treatment furnace such as a belt furnace, and sintered at a temperature about the softening point of the glass powder to produce a sintered body.
  • a heat treatment furnace such as a belt furnace
  • the sintering in the heat treatment furnace may be performed a plurality of times. When the sintering is performed a plurality of times, the strength of the sintered body is improved and the sintered body can be prevented from being broken or broken.
  • the organic resin is a component for bonding and granulating powders, and the amount added is 0 to 20% by mass with respect to 100% by mass of glass powder (or mixed powder of glass powder and refractory filler powder). It is preferable that As the organic resin, acrylic resin, ethyl cellulose, polyethylene glycol derivative, nitrocellulose, polymethylstyrene, polyethylene carbonate, methacrylic acid ester and the like can be used. In particular, an acrylic resin is preferable because of its good thermal decomposability.
  • the addition amount of the organic solvent is preferably 5 to 35% by mass with respect to 100% by mass of the sealing material.
  • toluene is preferable because it has good solubility in organic resin
  • the produced sintered body is placed on the opening 3 a of the cap member 3 and is later subjected to a sealing step between the window member 2 and the cap member 3.
  • the bonding material 4 may be used as a paste by adding a vehicle containing a solvent and a binder to glass powder (or a mixed powder of glass powder and refractory filler powder).
  • FIG. 2 is a schematic sectional view showing an optical cap component according to a second embodiment of the present invention.
  • the difference from the optical cap component according to the first embodiment is that, in the second embodiment, an annular end wall portion 3d continuous from the side wall portion 3c is further provided on the distal end side of the side wall portion 3c.
  • the window material 2 is fixed to the opening 3a existing at the center of the portion 3d.
  • the window material 2 can be easily fixed to the cap member 3.
  • the mechanical strength of the cap member 3 is improved, and the reliability as an optical cap component is increased.
  • the optical axes of the cap member 3 and the window material 2 can be easily aligned.
  • the ratio of the diameter of the opening 3a of the end wall 3d to the diameter of the cylindrical side wall 3c is 10% or more, 30% or more, 40% or more, 50% or more, 60% or more, particularly It is preferable that it is 70% or more. If the ratio is too small, the amount of light incident on the window material 2 tends to decrease, and the sensitivity of the sensor tends to decrease. In addition, in order to acquire the said effect, it is preferable that the upper limit of the said ratio is 95% or less, especially 90% or less.
  • FIG. 3 is a schematic cross-sectional view showing an optical cap component according to a third embodiment of the present invention.
  • the difference from the optical cap component according to the second embodiment is that, in the third embodiment, an annular flange portion 3e continuous from the side wall portion 3c is further extended outward on the base end side of the side wall portion 3c. It is the point that has taken out. In this way, the mechanical strength of the cap member 3 can be improved. Moreover, it becomes easy to fix the cap member 3 to the installation surface of the sensor body.
  • the simulation was performed with the following two patterns of condition 1 and condition 2 to investigate how much the light collecting ability changes depending on the form of the window material 2.
  • the index of the light collecting ability was (light quantity received by the sensor light receiving unit) / (light quantity of incident infrared light) ⁇ 100 (%).
  • the incident infrared light was collimated light.
  • FIG. 4 is a schematic cross-sectional view of the optical cap component used in the simulation under Condition 1.
  • FIG. 5 is a schematic cross-sectional view of the optical cap component used in the simulation under Condition 2.
  • loss such as light reflection on the window material surface is ignored.
  • condition 2 (the amount of light received by the sensor light receiving unit) / (the amount of incident infrared light) ⁇ 100 ⁇ 8.1 (%).

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Glass Compositions (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention concerne un composant de capuchon optique permettant d'obtenir une excellente sensibilité d'un capteur de gaz optique à l'aide d'une absorption infrarouge. Ce composant de capuchon optique est caractérisé en ce qu'il est pourvu : d'un matériau de fenêtre formé d'un verre de transmission infrarouge en forme de lentille ; et d'un élément de capuchon qui est pourvu d'une section de paroi latérale cylindrique présentant des ouvertures sur le côté d'extrémité avant et le côté d'extrémité de base. Le composant de capuchon optique est également caractérisé en ce que le matériau de fenêtre est fixé de sorte que l'ouverture sur le côté d'extrémité avant de l'élément de capuchon soit recouverte du matériau de fenêtre.
PCT/JP2017/036375 2016-11-02 2017-10-05 Composant de capuchon optique WO2018083941A1 (fr)

Priority Applications (3)

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CN201780067274.4A CN109923399B (zh) 2016-11-02 2017-10-05 光学用盖部件
US16/342,003 US20190248699A1 (en) 2016-11-02 2017-10-05 Optical cap component
US17/209,297 US20210230046A1 (en) 2016-11-02 2021-03-23 Optical cap component

Applications Claiming Priority (4)

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JP2016215161 2016-11-02
JP2016-215161 2016-11-02
JP2017-021009 2017-02-08
JP2017021009A JP6788224B2 (ja) 2016-11-02 2017-02-08 光学用キャップ部品

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US17/209,297 Continuation US20210230046A1 (en) 2016-11-02 2021-03-23 Optical cap component

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WO2020022002A1 (fr) * 2018-07-25 2020-01-30 日本電気硝子株式会社 Composant optique

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Publication number Priority date Publication date Assignee Title
WO2020022002A1 (fr) * 2018-07-25 2020-01-30 日本電気硝子株式会社 Composant optique
JP2020016519A (ja) * 2018-07-25 2020-01-30 日本電気硝子株式会社 光学部品

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