Abstract: An antenna unit to be used by being installed so as to face window glass of a building, the antenna unit including a radiating element, a reflective member configured to reflect electromagnetic waves radiated from the radiating element toward outside of the building, and a support unit configured to removably support the reflective member. An antenna unit attachment method includes installing an antenna unit so as to face window glass for a building, the antenna unit having a radiating element and a support unit, and supporting a reflective member that reflects electromagnetic waves radiated from the radiating element by the support unit on an outdoor side relative to the radiating element.

Abstract: A glass sheet contains, as represented by mass percentage based on oxides, SiO2: 65-75%, Al2O3: 0-20%, MgO: 0-5%, CaO: 2-20%, Na2O: 5-20%, K2O: 0-10%, total iron in terms of Fe2O3 (t-Fe2O3): 0.2-1.0%, TiO2: 0.65-1.5%, and CeO2: 0.1-2.0%. A ratio of the content of MgO to RO is 0.20 or less, where RO is a total amount of MgO, CaO, SrO and BaO. Fe-redox is from 30 to 57%. The glass sheet has a visible light transmittance Tv_A of 65% or more, a solar transmittance Te of 50% or less, and a dominant wavelength Dw of transmitted light of from 508 to 580 nm, in terms of a 3.9-mm thickness of the glass sheet. A value of A=([t-Fe2O3]×Fe-redox)/[TiO2] is from 20 to 40, where [t-Fe2O3] is the content of t-Fe2O3 and [TiO2] is the content of TiO2.

Abstract: An antenna unit to be used by being installed so as to face window glass of a building, the antenna unit including a radiating element, a reflective member configured to reflect electromagnetic waves radiated from the radiating element toward outside of the building, and a support unit configured to removably support the reflective member. An antenna unit attachment method includes installing an antenna unit so as to face window glass for a building, the antenna unit having a radiating element and a support unit, and supporting a reflective member that reflects electromagnetic waves radiated from the radiating element by the support unit on an outdoor side relative to the radiating element.

Abstract: A glass sheet contains, as represented by mass percentage based on oxides, SiO2: 65 to 75%, Al2O3: 0 to 20%, MgO: 0 to 5%, CaO: 2 to 20%, Na2O: 5 to 20%, K2O: 0 to 10%, total iron in terms of Fe2O3: 0.2 to 1.0%, and TiO2: 0.65 to 1.5%. The glass sheet has a ratio of the content of MgO to RO of 0.20 or less denoting RO as a total amount of MgO, CaO, SrO and BaO, and a mass ratio of divalent iron in terms of Fe2O3 to the total iron in terms of Fe2O3 of from 30 to 57%. The glass sheet has a visible light transmittance Tv_A of 65% or more, a solar transmittance Te of 50% or less, and a dominant wavelength Dw of transmitted light of from 508 to 580 nm, in terms of a 3.9-mm thickness of the glass sheet.

Abstract: To provide a colored glass plate of which the mass ratio of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 can be stably maintained at a high level while amber coloring derived from salt cake (Na2SO4) is suppressed by reducing the amount of salt cake used as a refining agent, and which has less bubbles regardless of a small amount of total sulfur as calculated as SO3. A colored glass plate which is made of alkali-containing silica glass containing iron, tin and sulfur, wherein, as represented by mass % based on oxides, the proportion of total sulfur as calculated as SO3 is less than 0.025%, the proportion of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 is at least 45%, the proportion of divalent tin as calculated as SnO2 to total tin as calculated as SnO2 is at least 0.1% as represented by mol %, and ?-OH is at least 0.15 mm?1.

Abstract: A heat-absorbing glass plate containing iron, tin, selenium, cobalt and sulfur, where the mass ratio of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 is at least 55%, the ratio Tv/Te of the visible light transmittance Tv (by illuminant A, 2° visual field) as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate to the solar transmittance Te as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, is at least 1.5, the visible light transmittance Tv (by illuminant A, 2° visual field) is at most 65% as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, and the excitation purity Pe is at most 7% as defined in JIS Z8701 (1999) calculated as 4 mm thickness of the glass plate.

Abstract: A heat-absorbing glass plate containing iron, tin, selenium, cobalt and sulfur, where the mass ratio of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 is at least 55%, the ratio Tv/Te of the visible light transmittance Tv (by illuminant A, 2° visual field) as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate to the solar transmittance Te as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, is at least 1.5, the visible light transmittance Tv (by illuminant A, 2° visual field) is higher than 65% as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, and the excitation purity Pe is at most 7% as defined in JIS Z8701 (1999) calculated as 4 mm thickness of the glass plate.

Abstract: To provide a heat-absorbing glass plate of which amber coloring is suppressed, and which satisfies both low solar transmittance and high visible light transmittance. The heat-absorbing glass plate of the present invention is one containing iron, tin and sulfur, wherein, as represented by mass % based on oxides, the MgO content is at most 4.5%, the amount of total tin as calculated as SnO2 is less than 0.4%, and the ratio (SnO2/SO3) of the amount of total tin to the amount of total sulfur as calculated as SO3 is from 0.2 to 100.

Abstract: A heat-absorbing glass plate containing iron, tin and sulfur, where, as represented by mass % based on oxides, the amount of total iron as calculated as Fe2O3 is at least 0.3%, the amount of total tin as calculated as SnO2 is less than 0.4%, and the ratio (SnO2/SO3) of the amount of total tin to the amount of total sulfur as calculated as SO3 is from 0.2 to 100.

Abstract: To provide a heat-absorbing glass plate of which amber coloring is suppressed, and which satisfies both low solar transmittance and high visible light transmittance. The heat-absorbing glass plate of the present invention is one containing iron, tin and sulfur, wherein, as represented by mass % based on oxides, the amount of total iron as calculated as Fe2O3 is at least 0.3%, the amount of total tin as calculated as SnO2 is less than 0.4%, and the ratio (SnO2/SO3) of the amount of total tin to the amount of total sulfur as calculated as SO3 is from 0.2 to 100.

Abstract: To provide a heat-absorbing glass plate having a low visible light transmittance, a solar transmittance sufficiently lower than the visible light transmittance, and a low excitation purity, and a process for its production. A heat-absorbing glass plate containing iron, tin, selenium, cobalt and sulfur, wherein the mass ratio of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 is at least 55%, the ratio Tv/Te of the visible light transmittance Tv (by illuminant A, 2° visual field) as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate to the solar transmittance Te as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, is at least 1.5, the visible light transmittance Tv (by illuminant A, 2° visual field) is at most 65% as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, and the excitation purity Pe is at most 7% as defined in JIS Z8701 (1999) calculated as 4 mm thickness of the glass plate.

Abstract: To provide a colored glass plate of which the mass ratio of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 can be stably maintained at a high level while amber coloring derived from salt cake (Na2SO4) is suppressed by reducing the amount of salt cake used as a refining agent, and which has less bubbles regardless of a small amount of total sulfur as calculated as SO3. A colored glass plate which is made of alkali-containing silica glass containing iron, tin and sulfur, wherein, as represented by mass % based on oxides, the proportion of total sulfur as calculated as SO3 is less than 0.025%, the proportion of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 is at least 45%, the proportion of divalent tin as calculated as SnO2 to total tin as calculated as SnO2 is at least 0.1% as represented by mol %, and ?-OH is at least 0.15 mm?1.

Abstract: To provide a heat-absorbing glass plate of which amber coloring is suppressed, and which satisfies both low solar transmittance and high visible light transmittance. The heat-absorbing glass plate of the present invention is one containing iron, tin and sulfur, wherein, as represented by mass % based on oxides, the MgO content is at most 4.5%, the amount of total tin as calculated as SnO2 is less than 0.4%, and the ratio (SnO2/SO3) of the amount of total tin to the amount of total sulfur as calculated as SO3 is from 0.2 to 100.

Abstract: To provide a heat-absorbing glass plate having a low solar transmittance, a high visible light transmittance and a low excitation purity, and a process for its production. A heat-absorbing glass plate containing iron, tin, selenium, cobalt and sulfur, wherein the mass ratio of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 is at least 55%, the ratio Tv/Te of the visible light transmittance Tv (by illuminant A, 2° visual field) as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate to the solar transmittance Te as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, is at least 1.5, the visible light transmittance Tv (by illuminant A, 2° visual field) is higher than 65% as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, and the excitation purity Pe is at most 7% as defined in JIS Z8701 (1999) calculated as 4 mm thickness of the glass plate.

Abstract: To provide glass having a favorable color tone, and its production process. Glass comprising, as represented by mass percentage based on oxides, at least 60% and at most 75% of SiO2, at least 8% and at most 20% of Na2O, at least 4.5% of MgO, at least 1% and at most 10% of CaO, and at least 0.01% and at most 0.5% of Er2O3.

Abstract: To provide a colored glass plate which, despite containing substantially no expensive cerium, simultaneously satisfies low solar transmittance, high visible light transmittance and low UV transmittance, while transmitted light has a green color tone. The colored glass plate comprises, as represented by mass percentage based on oxides, SiO2: from 65 to 75%, Al2O3: from 0 to 6%, MgO: from 2 to 6%, CaO: from 5 to 15%, total iron calculated as Fe2O3: from 0.3 to 1.2%, total titanium calculated as TiO2: from 0.2 to 1.1%, and total vanadium calculated as V2O5: from 0.02 to 0.3%, and contains substantially no cerium, cobalt, chromium or manganese.

Abstract: To provide a colored glass plate which, despite containing substantially no expensive cerium, simultaneously satisfies low solar transmittance, high visible light transmittance and low UV transmittance, while transmitted light has a green color tone, The colored glass plate comprises, as represented by mass percentage based on oxides, SiO2: from 65 to 75%, Al2O3: from 0 to 6%, MgO: at least 0% and less than 2%, CaO: from 5 to 15%, total iron calculated as Fe2O3: from 0.3 to 1.2%, total titanium calculated as TiO2: from 0.2 to 1.1%, and total vanadium calculated as V2O5: from 0.02 to 0.3%, and contains substantially no cerium, cobalt, chromium or manganese.

Abstract: To provide a colored glass plate which, despite the content of expensive cerium controlled to be low, simultaneously satisfies low solar transmittance, high visible light transmittance and low UV transmittance, while transmitted light has a green color tone. The colored glass plate comprises, as represented by mass percentage based on oxides, SiO2: from 65 to 75%, Al2O3: from 0 to 6%, MgO: from 0 to 6%, CaO: from 5 to 15%, total iron calculated as Fe2O3: from 0.3 to 1.2%, total titanium calculated as TiO2: from 0.2 to 1.1%, total vanadium calculated as V2O5: from 0.02 to 0.3%, and total cerium calculated as CeO2: from 0.01 to 0.5%, and contains substantially no cobalt, chromium or manganese.

Abstract: To provide a heat-absorbing glass plate which satisfies both low solar transmittance and high visible light transmittance, presents a green color as transmitted light and contains a small number of coloring components. The heat-absorbing glass plate of the present invention has a solar transmittance of at most 42% calculated as 4 mm thickness, has a visible light transmittance (by illuminant A, 2° visual field) of at least 70% calculated as 4 mm thickness, and provides a transmitted light having a dominant wavelength of from 492 to 520 nm, and it is made of soda lime silica glass having substantially the following composition, as represented by mass % based on oxides. SiO2: 65 to 75%, Al2O3: more than 3% and at most 6%, MgO: at least 0% and less than 2%, CaO: 7 to 10%, total iron as calculated as Fe2O3: 0.45 to 0.65%, and TiO2: 0.2 to 0.

Abstract: The present invention relates to a chemically strengthened glass for a display device, having a visible light transmittance Tva of 50% or more and less than 91% at a thickness of 1 mm using A light source, and an excitation purity Pe of less than 0.5% at a thickness of 1 mm.