摘要:
A P2O5—BaO—ZnO—Nb2O5 type optical glass contains 25-50 wt. % P2O5, 15-35 wt. % BaO, 1-25 wt. ZnO, and 3-10 wt. % Nb2O5. The optical glass has a high refractive index (particularly preferably the refractive index nd of 1.6 or more), low dispersion (an Abbe number υd of 42 or more), a low deformation point, and improved resistance to devitrification upon molding, and is suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure.
摘要翻译:P2O5-BaO-ZnO-Nb2O5型光学玻璃含有25〜50wt。 %P 2 O 5,15-35wt。 %BaO,1-25wt。 ZnO和3-10wt。 %Nb2O5。 光学玻璃具有高折射率(特别优选折射率nd为1.6以上),低色散(阿贝数为42以上),低变形点,成型时耐失透性提高,适合 用于精密模压成型或其它成型工艺,也适用于精细结构的转印。
摘要:
A P2O5—BaO—ZnO—Nb2O5 type optical glass contains 25-50 wt. % P2O5, 15-35 wt. % BaO, 1-25 wt. ZnO, and 3-10 wt. % Nb2O5. The optical glass has a high refractive index (particularly preferably the refractive index nd of 1.6 or more), low dispersion (an Abbe number υd of 42 or more), a low deformation point, and improved resistance to devitrification upon molding, and is suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure.
摘要翻译:P2O5-BaO-ZnO-Nb2O5型光学玻璃含有25〜50wt。 %P 2 O 5,15-35wt。 %BaO,1-25wt。 ZnO和3-10wt。 %Nb2O5。 光学玻璃具有高折射率(特别优选折射率nd为1.6以上),低色散(阿贝数为42以上),低变形点,成型时耐失透性提高,适合 用于精密模压成型或其它成型工艺,也适用于精细结构的转印。
摘要:
An optical glass having a high refractive index (particularly preferably a refractive index of 1.6 or more), low dispersion (an Abbe number of 45 or more), a low deformation point, and improved resistance to devitrification upon molding, and suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure is provided. The optical glass contains 1.0-4.5 wt. % SiO2, 30.5-50.0 wt. % B2O3, 1.1-8.0 wt. % Li2O, 10.1-19.5 wt. % BaO, 15.5-30.0 wt. % ZnO, 3.0-15.0 wt. % Y2O3, and 10.0-19.5 wt. % La2O3.
摘要:
An optical glass having a high refractive index (particularly preferably a refractive index of 1.6 or more), low dispersion (an Abbe number of 45 or more), a low deformation point, and improved resistance to devitrification upon molding, and suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure is provided. The optical glass contains 1.0-4.5 wt. % SiO2, 30.5-50.0 wt. % B2O3, 1.1-8.0 wt. % Li2O, 10.1-19.5 wt. % BaO, 15.5-30.0 wt. % ZnO, 3.0-15.0 wt. % Y2O3, and 10.0-19.5 wt. % La2O3.
摘要:
A process for producing a glass having a rod refractive index distribution, which includes pressing a glass at a temperature below the glass transition temperature to form a glass having a density increased towards the surface layer thereof, or alternatively includes heating a glass at a temperature around the transition temperature at the lowest to prepare glass having a uniformly enhanced density and heating the treated glass under a pressure lower than the applied pressure at a temperature below the glass transition temperature of the glass to prepare a rod glass having a density increased towards the central portion.
摘要:
A process for producing a rod glass having a refractive index distribution, which includes pressing a glass at a temperature below the glass transition temperature to form a glass having a density increased towards the surface layer thereof, or alternatively includes heating a glass at a temperature around the transition temperature at the lowest to prepare glass having a uniformly enhanced density and heating the treated glass under a pressure lower than the applied pressure at a temperature below the glass transition temperature of the glass to prepare a glass having a density increased towards the central portion.
摘要:
A linear polyimide is produced from mellophanic dianhydride, diamine (NH2-A-NH2), and a monofunctional acid anhydride and contains a repeating unit represented by the following general formula (3): wherein A represents a divalent aromatic diamine residue or aliphatic diamine residue, B represents a monofunctional acid anhydride residue, and n represents a degree of polymerization.
摘要:
A method for producing a polymerized hydrocarbon includes a step of a dehalogenation of a halogenated hydrocarbon with a magnesium-diene complex. Low-molecular-weight compounds, such as dimers or trimers of hydrocarbon units, oligomers of hydrocarbon units, or polymers of hydrocarbon units can be produced by this method while generating significantly less odor.
摘要:
A component installing device comprises: a tray component supply section (8) having a plurality of conjointly provided tray component supply mechanisms (7) for moving selected trays (4) from a storage position (5) to a component supply position (6), according to need, thereby providing the components (2) accommodated therein for use; and a cassette component supply section (13) having a plurality of mutually aligned component supply cassettes (12) for carrying components in a tape cassette or a bulk cassette, and transporting said components to a component supply position (11), one at a time, thereby providing said components for use. Components (2) accommodated in the respective trays (4) located at the component supply positions (6) of the respective tray component supply mechanisms (7) in the tray component supply section (8), and components (2) transported to the component supply positions (11) of the respective component supply cassettes (12) in the cassette component supply section (13), are variously handled and installed at prescribed positions on a circuit board (1) by means of an installing head (21).
摘要:
A method for preparing bromofluorenes includes a step of dispersing a compound selected from the group consisting of fluorene, fluorenone, and derivatives of fluorene and fluorenone in water to prepare a disperse system. Bromination is initiated by adding bromine Br2 into the disperse system. Thus, bromofluorenes can be efficiently and economically prepared without using any environmentally harmful organic solvent requiring a high cost to dispose of.