Abstract: A glass laminate includes a glass substrate; and an anti-reflection layer laminated on the glass substrate and a minimum of absorbances of the glass laminate in wavelengths of 380 to 780 nm is 0.01 or more.

Abstract: A cover member includes at least a chemically strengthened glass. The chemically strengthened glass has a Young's modulus of 60 GPa or higher. The chemically strengthened glass includes a first surface and a second surface facing the first surface. The chemically strengthened glass has a thickness t of 0.4 mm or less.

Abstract: A cover member that protects at least one protection object includes a thin portion and a thick portion. The thin portion is formed by providing a concave portion on a back surface of the cover member. The thick portion is connected to the thin portion. A front surface of the thick portion is planar and a front surface of the thin portion is curved.

Abstract: There are provided a glass composition suitable for an optical conversion member containing phosphor particles low in heat resistance, an optical conversion member using the glass composition, and an illumination light source using the optical conversion member. A glass composition comprising, in mol % based on oxides, 5 to 35% of Bi2O3, 22 to 80% of B2O3, 10 to 48% of ZnO, and 0 to 4% of Al2O3, and not substantially containing SiO2, wherein a total amount of the Bi2O3 and the ZnO being 15% or more and less than 70%, an optical conversion member using the glass composition, an illumination light source using the optical conversion member, and a liquid crystal display device using the illumination light source are provided.

Abstract: The glass optical waveguide body contains an optical waveguide and has undergone a chemical strengthening, and when it is used as a cover glass or the like, the glass optical waveguide body has high resistance against scratching and cracking and can enhance its design qualities by displaying an image by the optical waveguide in a state of floating.

Abstract: In a machine tool, a column base (12) is supported on a bed (11) movably in a horizontal direction, and a column (13) is installed vertically on the column base (12). A saddle (14) is supported on a side of the column (13) movably in a vertical direction, and a ram stock (15) is supported on the saddle (14) movably in a horizontal direction. A main spindle (16) is rotatably supported by the ram stock (15). A weight (22) is supported in the column (13) movably in a direction parallel to the ram stock (15), so that the weight (22) can be moved horizontally by a servo motor (23). An NC device (25) moves the weight (22) by the servo motor (23) synchronously with a movement of the ram stock (15), to adjust balance of the column (13), thereby enabling to reduce the size of an apparatus and realize space saving.

Abstract: In a machine tool or a processing method, a column base (12) is supported on a bed (11) movably in a horizontal direction, and a column (13) is installed vertically on the column base (12). A saddle (14) is supported on a side of the column (13) movably in a vertical direction, and a ram stock (15) is supported on the saddle (14) movably in a horizontal direction. A spindle (16) is rotatably supported by the ram stock (15), a damper (21) is provided on the ram stock (15), and an O-ring (22) is provided between the ram stock (15) and the damper (21), so that the O-ring (22) can be deformed by a pressing member (23). An NC device (24) can adjust a deformation degree of the O-ring (22) by the pressing member (23) depending on a mass of an attachment (17). Therefore, vibration of a tool can be effectively damped by changing a natural frequency according to replacement or movement of the attachment.

Abstract: In a machine tool, a column base (12) is supported on a bed (11) movably in a horizontal direction, and a column (13) is installed vertically on the column base (12). A saddle (14) is supported on a side of the column (13) movably in a vertical direction, and a ram stock (15) is supported on the saddle (14) movably in a horizontal direction. A main spindle (16) is rotatably supported by the ram stock (15). A weight (22) is supported in the column (13) movably in a direction parallel to the ram stock (15), so that the weight (22) can be moved horizontally by a servo motor (23). An NC device (25) moves the weight (22) by the servo motor (23) synchronously with a movement of the ram stock (15), to adjust balance of the column (13), thereby enabling to reduce the size of an apparatus and realize space saving.

Abstract: A non-lead optical glass consisting essentially of, as represented by mol %, from 45 to 75% of Bi2O3, from 12 to 45% of B2O3, from 1 to 20% of Ga2O3, from 1 to 20% of In2O3, from 0 to 20% of ZnO, from 0 to 15% of BaO, from 0 to 15% of SiO2+Al2O3+GeO2, from 0 to 15% of MgO+CaO+SrO, from 0 to 10% of SnO2+TeO2+TiO2+ZrO2+Ta2O3+Y2O3+WO3 and from 0 to 5% of CeO2, wherein Ga2O3+In2O3+ZnO?5%. An optical fiber comprising the above non-lead optical glass as a core.

Abstract: To provide a process for producing an air cladding type optical fiber by a method other than extrusion molding. A process for producing an optical fiber comprising a hollow glass fiber with an optical transmission glass held to extend in its axial direction at its center, which process comprises a step of heating and drawing a glass rod having three or more holes with an equal diameter provided around its center axis to extend in its axial direction where the distance between each hole and the axis is mutually equal and the distance between adjacent holes is mutually equal, and a portion surrounded by such holes will constitute said optical transmission glass, while applying pressure to expand the holes with one end of the rod closed, to form a preform wherein glass between the holes is in a plate form, and subjecting the preform to wire drawing to form an optical fiber in which said optical transmission glass is held by plate glass.

Abstract: A nonlinear fiber having a third-order nonlinear coefficient of at least 30 W?1km?1, and its cladding containing Er or Tm at a portion within 3 ?m from the interface with its core. A wavelength conversion method of making a signal light having a wavelength ?S and an intensity IS and a pump light having a wavelength ?P which is shorter than 2?S and an intensity higher than IS enter a nonlinear fiber 1, and generating a converted light having a wavelength ?C of ?S?P/(2?S??P) and an intensity IC by four wave mixing, wherein Er or Tm is present in the cladding at a portion with a diameter in the nonlinear fiber 1 of at most the mode field diameter, and the converted light is generated by four wave mixing while Er or Tm is excited by an excitation light.

Abstract: A nonlinear fiber having a third-order nonlinear coefficient of at least 30 W?1km?1, and its cladding containing Er or Tm at a portion within 3 ?m from the interface with its core. A wavelength conversion method of making a signal light having a wavelength ?S and an intensity IS and a pump light having a wavelength ?P which is shorter than 2?S and an intensity higher than IS enter a nonlinear fiber 1, and generating a converted light having a wavelength ?C of ?S?P/(2?S??P) and an intensity IC by four wave mixing, wherein Er or Tm is present in the cladding at a portion with a diameter in the nonlinear fiber 1 of at most the mode field diameter, and the converted light is generated by four wave mixing while Er or Tm is excited by an excitation light.

Abstract: A non-lead optical glass consisting essentially of, as represented by mol %, from 45 to 75% of Bi2O3, from 12 to 45% of B2O3, from 1 to 20% of Ga2O3, from 1 to 20% of In2O3, from 0 to 20% of ZnO, from 0 to 15% of BaO, from 0 to 15% of SiO2+Al2O3+GeO2, from 0 to 15% of MgO+CaO+SrO, from 0 to 10% of SnO2+TeO2+TiO2+ZrO2+Ta2O3+Y2O3+WO3 and from 0 to 5% of CeO2, wherein Ga2O3+In2O3+ZnO?5%. An optical fiber comprising the above non-lead optical glass as a core.

Abstract: An electromagnetic contactor having normally open and normally closed contact pairs 22, 26 includes a movable crossbar 12 having apertures 14 with sloping guide surface 18', 18" for guiding movable contact members 16 disposed in the apertures. These sloping surfaces serve to jam the crossbar against the base 10 of the contactor when the crossbar is moved in a direction to open fused contact pairs, to thereby prevent the normally open and normally closed contact pairs from being closed at the same time.