Asahi Glass Company, Limited

Agc Inc.

Seiki Ohara

Junko Miyasaka

Shotaro Takenobu

Shusaku Akiba

Qing Li

Suguru Murayama

Takahiro Sakagami

Kazutaka Ono

Tetsuya Nakashima

Kenta Kobayashi

Naoya Wada

Naoki Sugimoto

Kei Maeda

Yasumasa Nakao

Hiroyuki Hijiya

Tatsuo Nagashima

Toshihisa Okada

Satoko Noma

Shuji Yamazaki

Hideaki Hayashi

Yuki Kondo

Hiroyuki Ohkawa

Yutaka Kuroiwa

Junichiro Kase

Keisuke Hanashima

Yasuji Fukasawa

Kosho Akatsuka

Kazunari Tohyama

Kenji Kitaoka

Shunji Wachi

Hironobu Sato

Tomoharu Hasegawa

Katsuhiro Ochiai

Manuel Reyes

Manuel Reyes Diaz

Takeshi Hirose

The present invention relates to a chemically strengthened glass with a film, including: a chemically strengthened glass having a pair of main surfaces opposing each other; and a film formed on at least one of the main surfaces of the chemically strengthened glass, in which the chemically strengthened glass has two or less interference fringes observed under stress measurement utilizing surface propagation light having a wavelength of 365 nm, and the film has a refractive index lower than a refractive index of the chemically strengthened glass.

Chemically strengthened glass with a film and method for measuring surface stress of chemically strengthened glass

The present invention provides a polymer optical waveguide having a core, an under cladding and an over cladding, in which: the polymer optical waveguide has a first section on one end side in the light propagation direction where no portion of the over cladding exists and the core and the under cladding are exposed, and a second section on the other end side in the light propagation direction where the core is covered with the under cladding and the over cladding; and a relative refractive index difference among the core, the under cladding and the over cladding, a core width and core height in an end surface at the one end side of the first section, and a core width and core height in an end surface at the other end side of the second section satisfy predetermined relationships.

Polymer optical waveguide and composite optical waveguide

A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 80% of SiO, 13 to 18% of AlO, 0 to 5% of BO, 0.5 to 4% of PO, 4 to 10% of LiO, 5 to 14% of NaO, 0 to 2% of KO, 0 to 11% of MgO, 0 to 5% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO, and 0 to 2% of ZrO. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO&#xd7;329+AlO&#xd7;786+BO&#xd7;627+PO&#xd7;(&#x2212;941)+LiO&#xd7;927+NaO&#xd7;47.5+KO&#xd7;(&#x2212;371)+MgO&#xd7;1230+CaO&#xd7;1154+SrO&#xd7;733+ZrO&#xd7;51.8, by using the contents in mole percentage on an oxide basis of components.

Chemically strengthened glass, and glass for chemical strengthening

The present invention relates to a glass ceramic including crystals, and including, in mol % in terms of oxides: 65-75% of SiO; 3-6% of AlO; 15-25% of LiO; 0.2-4% of PO; 0.5-5% of ZrO; and 0.01-0.5% of HfO, in which the crystals include one or more kinds of crystals selected from the group consisting of &#x3b2;-spodumene crystals, petalite crystals, and eucryptite crystals.

Glass ceramic and chemically strengthened glass

The present invention relates to a polymer optical waveguide including: a core; an under-cladding; and an over-cladding, in which the polymer optical waveguide includes a coupling section and an optical waveguide section that are provided along a light propagation direction, the polymer optical waveguide includes portions having different core widths along the light propagation direction, and when a core width at a portion a having a narrowest core width is denoted Wa (&#x3bc;m) and a core height at the portion a is denoted Ha (&#x3bc;m), Ha is 1.3 &#x3bc;m or more and 4.5 &#x3bc;m or less, and Ha/Wa is 1.15 or less.

The present invention provides a polymer optical waveguide containing: a core; and a cladding having a refractive index lower than that of the core, provided around the core, in which the polymer optical waveguide has a core-coupling section where at least a part of the cladding is not present along a light propagation direction of the polymer optical waveguide and an application type removal film A provided so as to come into contact with the core of the core-coupling section.

Polymer optical waveguide

The present invention relates to a resin optical waveguide including a core and a cladding having a refractive index lower than that of the core, in which the resin optical waveguide includes, along a light propagation direction, a coupling part at which at least a part of the core is exposed and an optical waveguide part where the whole circumference of the core is covered with the cladding, and the core has a width Wb at an end part of the coupling part at a side of the optical waveguide part being larger than a width Wa of the core at an end part of the coupling part at a side opposite to the optical waveguide part.

Resin optical waveguide and composite optical waveguide

Provided is a resin optical waveguide containing a core, under cladding and over cladding, in which the resin optical waveguide has portions having a core width varying along a light propagation direction, the maximum core width is 4 to 10 &#x3bc;m, and the minimum core width of 1 &#x3bc;m or more and less than 4 &#x3bc;m, when the length of a portion S at which the core width is 1 &#x3bc;m or more and less than 4 &#x3bc;m is LS and the length of a portion at which the core width is 4 to 10 &#x3bc;m is LL, the proportion of LS to the total length is 0.1 to 40%, and the portion S contains neither a certain bubble defect nor a certain defect inside the core and in a vicinity of a core-cladding interface.

Resin optical waveguide

A resin optical waveguide containing a core, an under cladding and an over cladding having refractive indices lower than that of the core, in which the resin optical waveguide has, at one end side of, a core-exposed section at which the over cladding is not present and the core and the under cladding nearby the core are exposed and, of the under cladding, a portion corresponding to the core-exposed section has a first layer and a second layer that satisfy a certain condition.

The present invention relates to a composite optical waveguide () containing a polymer optical waveguide and a silicon optical waveguide adiabatically coupled to each other, in which the polymer optical waveguide and the silicon optical waveguide are coupled to each other by an adhesive layer in an adiabatic-coupling portion where a core of the polymer optical waveguide and a core of the silicon optical waveguide are disposed to face each other, the adhesive layer is formed by using a photocurable adhesive having a glass transition point Tg being 125&#xb0; C. or higher after curing, and the adiabatic-coupling portion includes a region in which a spacing t between the core of the polymer optical waveguide and the silicon optical waveguide is 1.5 &#x3bc;m or less.

Composite optical waveguide

A glass for chemical strengthening contains, in mole percentage on an oxide basis, 58 to 72% of SiO, 7 to 18% of AlO, 1% or more of BO, 0 to 4% of PO, 5 to 16% of LiO, 0 to 7% of NaO, 0 to 2% of KO, 0 to 6% of MgO, 0 to 20% of CaO, 0 to 20% of SrO, 0 to 15% of BaO, 0 to 10% of ZnO, 0 to 1% of TiO, and 0 to 2% of ZrO. A value of X is 30000 or more. The value of X is calculated based on the formula, X=SiO&#xd7;329+AlO&#xd7;786+BO&#xd7;627+PO&#xd7;(&#x2212;941)+LiO&#xd7;927+NaO&#xd7;47.5+KO&#xd7;(&#x2212;371)+MgO&#xd7;1230+CaO&#xd7;1154+SrO&#xd7;733+ZrO&#xd7;51.8, by using the contents in mole percentage on an oxide basis of components.

A resin optical waveguide containing a core, an under cladding and an over cladding having refractive indices lower than that of the core, in which the resin optical waveguide has, at one end side thereof, a core-exposed section at which the over cladding is not present and the core is exposed and, of the under cladding, a portion corresponding to the core-exposed section has a core-neighboring region that satisfies the following (1) and (2): (1) the core-neighboring region is a region whose distance from the core is within x, and x is 5 &#x3bc;m or more and 20 &#x3bc;m or less; and (2) the core-neighboring region has a refractive index distribution that the refractive index at a side of an interface with the core is high and the refractive index at a far side from the interface with the core is low.

An object is to provide a glass for chemical toughening treatment satisfying low brittleness, low melt viscosity and high chemical toughening characteristics, and a chemically toughened glass using the same. Provided is a glass for chemical toughening treatment containing, in mass % in terms of oxides, SiO63 to 76, BO0 to 2, AlO2 to 10, MgO 2 to 12, CaO 0.1 to 8, NaO 14.5 to 19, KO 0 to 3, and FeO0 to 0.5, satisfying a total content of alkali earth metal oxides (RO) being from 5 to 15, satisfying 15&#xd7;MgO/RO&#x2212;RO&#x2265;3, and having a temperature Tat which a glass viscosity reaches 10dPa&#xb7;s being 1,600&#xb0; C. or lower.

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Tokyo, Japan

Seiki Ohara