Patents Assigned to Kabushiki Kaisha Ohara
  • Patent number: 7396786
    Abstract: A glass containing 5 to 25 mass % of P2O5, 0 to 15 mass % of B2O3, 0 to 5 mass % of SiO2+GeO2, 21 to 50 mass % of BaO+SrO, 0 to 3 mass % of Li2O+Na2O+K2O, and 35 to 65 mass % of Nb2O5, not substantially containing PbO, satisfying Nb2O5/(BaO+SrO)=0.85 to 2.20, having a dielectric constant of 15 or greater, a dielectric loss of 10.0×10?4 or less, and a resistivity of 1.0×1016 ?·cm or more.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: July 8, 2008
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Masaaki Miyata, Kazuo Ohara
  • Patent number: 7371703
    Abstract: An optical glass wherein an amount of change in refractive index (?n: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43 W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: May 13, 2008
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Akira Masumura, Muneo Nakahara, Satoru Matsumoto, Tatsuya Senoo
  • Patent number: 7368404
    Abstract: An optical glass having a refractive index (nd) and Abbe number (?d) within a range enclosed with a border line consisting of straight lines connecting point A (nd being 1.75 and ?d being 50.0), point B (nd being 1.80 and ?d being 46.0), point C (nd being 1.80 and ?d being 50.0) and point D (nd being 1.75 and ?d being 56.0) in the order of the point A, the point B, the point C, the point D and the point A in x-y rectangular coordinates in which x coordinate represents Abbe number (?d) and y coordinate represents refractive index (nd), including refractive index (nd) and Abbe number (?d) on the border line except for the straight line connecting the point A with the point D and the straight line connecting the point B with the point C, containing, as essential components, SiO2, B2O3, La2O3, Gd2O3, Li2O and F, and being substantially free of As2O3.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: May 6, 2008
    Assignee: Kabushiki Kaisha Ohara
    Inventor: Susumu Uehara
  • Patent number: 7335614
    Abstract: An optical glass having a refractive index (nd) and an Abbe number (vd) which are within an area surrounded by the straight lines which are drawn by connecting point A (nd=1.835, vd=46.5), point B (nd=1.90, vd=40.0), point C (nd=1.90, vd=35.0) and point D (nd=1.835, vd=38.0) in a sequence of A, B, C, D and A as border lines in x-y coordinates shown in FIG. 1, in which X-axis is the Abbe number (vd) and Y-axis is the refractive index (nd), the area including the border line. The optical glass has low glass transition temperature (Tg), and suitable for precision mold pressing.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: February 26, 2008
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Susumu Uehara, Koji Shimizu, Shinya Mashiko
  • Patent number: 7320949
    Abstract: An optical glass suitable for precision mold pressing has a refractive index (nd) of 1.88 or over and an Abbe number (? d) within a range from 22 to 28, comprises, in mass %, SiO2 15-25%? B2O3 0-5%? La2O3 0-5%? TiO2 5-15% ZrO2 0-10% Nb2O5 more than 30% and less than 50% WO3 0-5%? CaO 0-10% BaO 0-10% Li2O 3-12% Na2O 0-10% K2O 0-10% Bi2O3 0-15% Ta2O5 0-7%? and has a glass transition point (Tg) within a range from 500° C. to 580° C. The optical glass preferably has a yield point (At) within a range from 550° C. to 640° C.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: January 22, 2008
    Assignee: Kabushiki Kaisha Ohara
    Inventor: Susumu Uehara
  • Patent number: 7306879
    Abstract: A lithium ion secondary cell comprises a positive electrode, a negative electrode, a solid electrolyte and a fiber layer provided in an interface between the solid electrolyte and the positive electrode and/or in an interface between the solid electrolyte and the negative electrode.
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: December 11, 2007
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Yasushi Inda, Kazuo Ohara, Tetsuo Uchiyama, Morinobu Endo
  • Publication number: 20070259270
    Abstract: A lithium ion secondary cell comprises a positive electrode, a negative electrode, a solid electrolyte and a fiber layer provided in an interface between the solid electrolyte and the positive electrode and/or in an interface between the solid electrolyte and the negative electrode.
    Type: Application
    Filed: June 6, 2007
    Publication date: November 8, 2007
    Applicant: Kabushiki Kaisha Ohara
    Inventors: Yasushi Inda, Kazuo Ohara, Tetsuo Uchiyama, Morinobu Endo
  • Publication number: 20070197367
    Abstract: An optical glass has a refractive index (nd) of 1.60 or over and excellent transmittance and internal quality. The optical glass comprises 0.1-4 mass % of Ta2O5 to total mass of glass calculated on oxide basis, has ratio of 0.95<Ta2O5/(Ta2O5+(ZrO2)+TiO2+Nb2O5+WO3)×5)?1.00, and further comprises SiO2+B2O3+Al2O3+BaO in a total amount of 81% or over.
    Type: Application
    Filed: March 9, 2005
    Publication date: August 23, 2007
    Applicant: Kabushiki Kaisha Ohara
    Inventor: Michiko Ogino
  • Patent number: 7226881
    Abstract: There are provided glass-ceramics having an ultra low thermal expansion property and super flat surface capable of coping with lithography for the next generation LSI and component parts for semiconductor equipment such as masks, optical reflecting mirrors, wafer stages and reticle stages and various precision parts using such glass-ceramics. Glass-ceramics of the invention have an average linear thermal expansion coefficient within a range of 0.0±0.2×10?7/° C. within a temperature range from 0° C. to 50° C., have difference between the maximum value and the minimum value of ?L/L of 10×10?7 or below, and comprise SiO2, Al2O3 and P2O5 with the total amount thereof in mass % being within a range from 86.0% to 89.0%.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: June 5, 2007
    Assignee: Kabushiki Kaisha Ohara
    Inventor: Naoyuki Goto
  • Patent number: 7217672
    Abstract: An optical glass wherein an amount of change in refractive index (?n: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: May 15, 2007
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Akira Masumura, Muneo Nakahara, Satoru Matsumoto, Tatsuya Senoo
  • Patent number: 7211532
    Abstract: There are provided glass-ceramics having a high lithium ion conductivity which include in mol %: P2O5 38–40% TiO2 25–45% M2O3 (where M is Al or Ga) ?5–15% Li2O 10–20% and contain Li1+X(Al, Ga)XTi2?X(PO4)3 (where 0<X<0.8) as a main crystal phases. There are also provided glass-ceramics having a high lithium ion conductivity which include in mol %: P2O5 ?26–40% SiO2 0.5–12% TiO2 ?30–45% M2O3 (where M is Al or Ga) ??5–10% Li2O ?10–18% and contain Li1+X+YMXTi2?XSiYP3?YO12 (where 0<X?0.4 and 0<Y?0.6) as a main crystal phase. There are also provided solid electrolytes for an electric cell and a gas sensor using alkali ion conductive glass-ceramics, and a solid electric cell and a gas sensor using alkali ion conductive glass-ceramics as a solid electrolyte.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: May 1, 2007
    Assignee: Kabushiki Kaisha Ohara
    Inventor: Jie Fu
  • Patent number: 7196027
    Abstract: An optical glass wherein an amount of change in refractive index (?n: difference in refractive index between a state before radiation and a state after radiation) caused by radiation of laser beam at wavelength of 351 nm having average output power of 0.43 W, pulse repetition rate of 5 kHz and pulse width of 400 ns for one hour is 5 ppm or below is provided. The optical glass comprises a fluorine ingredient and/or a titanium oxide ingredient and/or an arsenic oxide ingredient. The optical glass suffers little change in refractive index by radiation of strong light having wavelengths of 300 nm to 400 nm such as ultraviolet laser.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: March 27, 2007
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Akira Masumura, Muneo Nakahara, Satoru Matsumoto, Tatsuya Senoo
  • Publication number: 20070048619
    Abstract: An all solid type lithium ion secondary battery which has high heat resistance and can be used over a broad temperature range, has a high battery capacity and an excellent charging discharging characteristic, and can be used stably for a long period of time includes an inorganic substance including a lithium ion conductive crystalline and is substantially free of an organic substance and an electrolytic solution. The inorganic substance comprising a lithium ion conductive crystalline preferably is lithium ion conductive glass-ceramics.
    Type: Application
    Filed: December 1, 2005
    Publication date: March 1, 2007
    Applicant: KABUSHIKI KAISHA OHARA
    Inventor: Yasushi Inda
  • Patent number: 7164481
    Abstract: A coefficient of linear expansion measuring apparatus includes: two reflection plates between which a sample is put, a container to house them, which is filled with a gas having known rate of a refractive index variation, a temperature regulating member to set a temperature in the container variably, a light source to irradiate an irradiating light to reflecting surfaces of the reflection plates, a light receiving element to receive reflected lights in which the lights interferes each other and detecting a light intensity thereof, and a calculating member to calculate a coefficient of linear expansion of the sample, wherein: the calculating member calculates an optical path length variation between the reflecting surfaces from an output variation of the light receiving element, and calculates a length variation of the sample by correcting a part of the optical path length variation derived from the refractive index variation of the gas caused by the temperature variation.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: January 16, 2007
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Nobuo Kawasaki, Toshihide Nakajima, Masahiko Daimon, Osamu Okajima
  • Patent number: 7148164
    Abstract: There are provided low expansion transparent glass-ceramics obtained by heat treating a base glass produced at a relatively low melting temperature of 1530° C. or below. The glass-ceramics have an average linear thermal expansion coefficient within a range from +6×10?7/° C. to +35×10?7/° C., 80% transmittance wavelength (T80) of 700 nm or below, internal transmittance of 75% or over at light wavelength of 1550 nm, heat resisting temperature of 800° C. or over and Young's modulus of 90 GPa or over. The glass-ceramics comprise SiO2, Al2O3, MgO, CaO, BaO, ZnO, Li2O, TiO2 and ZrO2 and contain ?-quartz or ?-quartz solid solution as a predominant crystal phase. There are also provided optical waveguide elements and an arrayed waveguide grating (AWG) type planar lightwave circuit utilizing these glass-ceramics.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: December 12, 2006
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Hiroyuki Minamikawa, Kazuo Ohara, Naoyuki Goto
  • Patent number: 7138349
    Abstract: An optical glass having a refractive index (nd) and an Abbe number (vd) which are within an area surrounded by the straight lines which are drawn by connecting point A (nd=1.835, vd=46.5), point B (nd=1.90, vd=40.0), point C, (nd=1.90, vd=35.0) and point D (nd=1.835, vd=38.0) in a sequence of A, B, C, D and A as border lines in x-y coordinates shown in FIG. 1, in which X-axis is the Abbe number (vd) and Y-axis is the refractive index (nd), the area including the border line. The optical glass has low glass transition temperature (Tg), and suitable for precision mold pressing. The optical glass which has the refractive index (nd) and Abbe number (vd) within the above-described area, where the area includes the border lines, has the composition of SiO2—B2O3—La2O3—Gd2O3—Li2O—F system, the transition temperature (Tg) of 550 to 650° C., and is free from lead, cadmium, thorium, Y2O3, P2O5 and TeO2.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: November 21, 2006
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Susumu Uehara, Koji Shimizu, Shinya Mashiko
  • Patent number: 7138348
    Abstract: An optical glass has optical constants which are an refractive index (nd) of 1.70–1.75 and an Abbe number (vd) of 45.0–54.0; a glass transformation temperature (Tg) of 500–580° C. The glass has the following composition in mass percent of: SiO2 more than 5–15%; B2O3 20-less than 30%; a total amount of SiO2+B2O3 more than 25–40%; La2O3 more than 21-less than 30%; Y2O3 more than 5–15%; Gd2O3 0-less than 10%; ZrO2 1–8%; Nb2O5 0.1–5%; Ta2O5 more than 5–12%; a total amount of ZrO2+Nb2O5+Ta2O5 7–20%; ZnO 0–10%; CaO 0–10%; SrO 0–5%; BaO 0–10%; a total amount of ZnO+CaO+SrO+BaO 5–15%; Li2O 1–8%; Sb2O3 0–1%; and As2O3 0–1%. The glass is substantially free of Yb2O3 and Al2O3. Devitrification is not generated when the optical glass is kept at a temperature of 920° C. for two hours.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: November 21, 2006
    Assignee: Kabushiki Kaisha Ohara
    Inventor: Susumu Uehara
  • Publication number: 20060229186
    Abstract: An optical glass having a refractive index (nd) and an Abbe number (?d) which are within an area surrounded by the straight lines which are drawn by connecting point A (nd=1.835, ?d=46.5), point B (nd=1.90, ?d=40.0), point C, (nd=1.90, ?d=35.0) and point D (nd=1.835, ?d=38.0) in a sequence of A, B, C, D and A as border lines in x-y coordinates shown in FIG. 1, in which X-axis is the Abbe number (?d) and Y-axis is the refractive index (nd), the area including the border line. The optical glass has low glass transition temperature (Tg), and suitable for precision mold pressing.
    Type: Application
    Filed: June 12, 2006
    Publication date: October 12, 2006
    Applicant: KABUSHIKI KAISHA OHARA
    Inventors: Susumu Uehara, Koji Shimizu, Shinya Mashiko
  • Patent number: 7101625
    Abstract: Glass for a light filter capable of preventing variation of refractive index in a band-pass filter has a coefficient of thermal expansion within a range from 90×10?7/° C. to 120×10?7/° C. within a temperature range from ?20° C. to +70° C. and, preferably, Young's modulus of 75 GPa or over and Vickers hardness of 550 or over, and light transmittance for plate thickness of 10 mm of 90% or over within a wavelength range from 950 nm to 1600 nm.
    Type: Grant
    Filed: April 28, 2004
    Date of Patent: September 5, 2006
    Assignee: Kabushiki Kaisha Ohara
    Inventor: Naoyuki Goto
  • Patent number: RE39437
    Abstract: A negative thermal expansion glass ceramic having a negative coefficient of thermal expansion, which is a sufficiently large absolute value in a temperature range of ?40° C. to +160° C. and a method for producing the same are provided. The negative thermal expansion glass ceramic has a coefficient of thermal expansion of ?25 to ?100×10?7/° C. in the temperature range of ?40° C. to +160° C., and comprises main crystalline phases which are one or more types selected from a group consisting of ?-eucryptite solid solution (?-Li2O•Al2O3•2SiO2 solid solution), ?-eucryptite (?-Li2O•Al2O3•2SiO2), ?-quartz solid solution (?-SiO2) solid solution), and ?-quartz (?-SiO2), wherein a total amount of crystals of the main crystalline phases can be 70 to 100% in mass percent.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: December 19, 2006
    Assignee: Kabushiki Kaisha Ohara
    Inventors: Ayako Yamaguchi, Naoyuki Goto