Abstract: A welding torch includes a torch body including a flow path forming portion that forms a shielding gas flow path into which an inert gas flows and an outer gas flow path communicating with the shielding gas flow path, a first gas lens that straightens the inert gas in the shielding gas flow path and blows the inert gas out as a shielding gas, and a second gas lens that straightens the inert gas in the outer gas flow path and blows the inert gas out as an outer gas. Provided is an all-position welding device that performs butt welding of tubes, and includes the welding torch and a rotation mechanism for rotating the welding torch around the tube.

Abstract: A welding torch includes a gas lens of a lattice structure that straightens a shielding gas. The welding torch includes a non-consumable electrode, an electrode holder into which the non-consumable electrode is inserted, and a torch body including a sleeve that holds the electrode holder, a flow path forming portion that forms a shielding gas flow path around the sleeve, and a nozzle that forms a shielding gas guiding space around a distal end of the non-consumable electrode, the distal end extending from the electrode holder, in which the gas lens is provided so as to separate the shielding gas flow path from the shielding gas guiding space.

Abstract: In an ophthalmic examination system of one embodiment, an internal examiner terminal is used by an internal examiner in a facility where an ophthalmic examination apparatus is installed. An external examiner terminal is used by an external examiner outside the facility. A management apparatus includes a communication establishment unit, and an information transfer unit. The communication establishment unit is capable of establishing communication between at least two apparatuses selected from the ophthalmic examination apparatus, the internal examiner terminal, and the external examiner terminal. The information transfer unit is configured to transfer information sent from one of the at least two apparatuses whose communication has been established by the communication establishment unit. Each of the ophthalmic examination apparatus, the internal examiner terminal, and the external examiner terminal includes an output unit configured to output information transferred by the information transfer unit.

Abstract: A welding torch includes a gas lens of a lattice structure that straightens a shielding gas. The welding torch includes a non-consumable electrode, an electrode holder into which the non-consumable electrode is inserted, and a torch body including a sleeve that holds the electrode holder, a flow path forming portion that forms a shielding gas flow path around the sleeve, and a nozzle that forms a shielding gas guiding space around a distal end of the non-consumable electrode, the distal end extending from the electrode holder, in which the gas lens is provided so as to separate the shielding gas flow path from the shielding gas guiding space.

Abstract: A welding torch includes a torch body including a flow path forming portion that forms a shielding gas flow path into which an inert gas flows and an outer gas flow path communicating with the shielding gas flow path, a first gas lens that straightens the inert gas in the shielding gas flow path and blows the inert gas out as a shielding gas, and a second gas lens that straightens the inert gas in the outer gas flow path and blows the inert gas out as an outer gas. Provided is an all-position welding device that performs butt welding of tubes, and includes the welding torch and a rotation mechanism for rotating the welding torch around the tube.

Abstract: A welding device which performs butt welding of tubes includes a table. The table supports a rotary member of a circular-arc shape to which a welding torch is mounted, and a gear train that rotates the rotary member around a center axis of the tubes. The welding device includes a first movement mechanism that moves the table in a first direction perpendicular to the center axis of the tubes, and a second movement mechanism that moves the first movement mechanism in a second direction perpendicular to the center axis of the tubes and the first direction.

Abstract: The present invention provides an arc welding control system and method capable of simultaneously, sophisticatedly performing a weaving width control operation and a torch height control operation. Influence ratios (?w and ?z) of influences of a torch height deviation (?Ph) and a groove wall distance deviation (?Pd) with respect to a manipulated variable (?w) of a weaving width and a manipulated variable (?z) of a torch height are set in accordance with a groove angle (?) of a workpiece (5). A calculation unit (21) calculates the manipulated variables (?z and ?w) of actuators (13 and 14) regarding the torch height and the weaving width such that the influence ratios (?w and ?z) become large as the groove angle (?) becomes large.

Abstract: According to an ophthalmic examination system of an embodiment, a user interface of an examination instruction apparatus is used to enter an instruction for examination. A first communication unit sends the instruction to an ophthalmic examination apparatus in real time. An examination optical system of the ophthalmic examination apparatus includes an optical element applied to an eye and a projection system that projects an examination light beam onto the eye through the optical element. An information presentation optical system includes a display and a light guide system that guides a display light beam from the display to the eye through the optical element. A second communication unit receives the instruction from the examination instruction apparatus. A controller displays the instruction received by the second communication unit on the display in real time.

Abstract: In an ophthalmic examination system of one embodiment, an internal examiner terminal is used by an internal examiner in a facility where an ophthalmic examination apparatus is installed. An external examiner terminal is used by an external examiner outside the facility. A management apparatus includes a communication establishment unit, and an information transfer unit. The communication establishment unit is capable of establishing communication between at least two apparatuses selected from the ophthalmic examination apparatus, the internal examiner terminal, and the external examiner terminal. The information transfer unit is configured to transfer information sent from one of the at least two apparatuses whose communication has been established by the communication establishment unit. Each of the ophthalmic examination apparatus, the internal examiner terminal, and the external examiner terminal includes an output unit configured to output information transferred by the information transfer unit.

Abstract: According to an ophthalmic examination system of an embodiment, a user interface of an examination instruction apparatus is used to enter an instruction for examination. A first communication unit sends the instruction to an ophthalmic examination apparatus in real time. An examination optical system of the ophthalmic examination apparatus includes an optical element applied to an eye and a projection system that projects an examination light beam onto the eye through the optical element. An information presentation optical system includes a display and a light guide system that guides a display light beam from the display to the eye through the optical element. A second communication unit receives the instruction from the examination instruction apparatus. A controller displays the instruction received by the second communication unit on the display in real time.

Abstract: A welding device which performs butt welding of tubes includes a table. The table supports a rotary member of a circular-arc shape to which a welding torch is mounted, and a gear train that rotates the rotary member around a center axis of the tubes. The welding device includes a first movement mechanism that moves the table in a first direction perpendicular to the center axis of the tubes, and a second movement mechanism that moves the first movement mechanism in a second direction perpendicular to the center axis of the tubes and the first direction.

Abstract: The present invention provides an arc welding control system and method capable of simultaneously, sophisticatedly performing a weaving width control operation and a torch height control operation. Influence ratios (?w and ?z) of influences of a torch height deviation (?Ph) and a groove wall distance deviation (?Pd) with respect to a manipulated variable (?w) of a weaving width and a manipulated variable (?z) of a torch height are set in accordance with a groove angle (?) of a workpiece (5). A calculation unit (21) calculates the manipulated variables (?z and ?w) of actuators (13 and 14) regarding the torch height and the weaving width such that the influence ratios (?w and ?z) become large as the groove angle (?) becomes large.

Abstract: The present invention provides an arc welding control system and method capable of simultaneously, sophisticatedly performing a weaving width control operation and a torch height control operation. Influence ratios (?w and ?z) of influences of a torch height deviation (?Ph) and a groove wall distance deviation (?Pd) with respect to a manipulated variable (?w) of a weaving width and a manipulated variable (?z) of a torch height are set in accordance with a groove angle (?) of a workpiece (5). A calculation unit (21) calculates the manipulated variables (?z and ?w) of actuators (13 and 14) regarding the torch height and the weaving width such that the influence ratios (?w and ?z) become large as the groove angle (?) becomes large.

Abstract: The present invention provides an arc welding control system and method capable of simultaneously, sophisticatedly performing a weaving width control operation and a torch height control operation. Influence ratios (?w and ?z) of influences of a torch height deviation (?Ph) and a groove wall distance deviation (?Pd) with respect to a manipulated variable (?w) of a weaving width and a manipulated variable (?z) of a torch height are set in accordance with a groove angle (?) of a workpiece (5). A calculation unit (21) calculates the manipulated variables (?z and ?w) of actuators (13 and 14) regarding the torch height and the weaving width such that the influence ratios (?w and ?z) become large as the groove angle (?) becomes large.

Abstract: Provided is an optometry apparatus capable of checking details of input operation performed by a person to be examined to smoothly perform an examination. The optometry apparatus includes: an optical head portion having a liquid crystal display device for indicating an index such as a Landolt ring to the left eye of the person to be examined; an optical head portion having a liquid crystal display device for indicating an index to the right eye of the person to be examined; a joystick lever for inputting a reply to the indices indicated by the liquid crystal display devices, which is operated by the person to be examined; and a control portion that causes the liquid crystal display devices to display operational detail information indicating operational details of the joystick lever operated by the person to be examined in addition to the indices.

Abstract: An optometric apparatus 2 according to the present invention comprises a body portion 5r provided with an optical system for a right eye for projecting a chart for the right eye in order to inspect visual function of both eye of an examinee and a body portion 5l provided with an optical system for a left eye for projecting a chart for the left eye, the optical systems for the right and left eyes projecting the same fusion patterns to perform fusion of the both eyes of the examinee.

Abstract: A visual acuity chart displaying apparatus, which is thin, has many indexes, including minutely small index. It includes a first index indicating mode for illuminating the film member having indexes from the rear lighting the liquid crystal display device, and a second mode for retreating the film member from the position located in front of the liquid crystal device and displaying the index pattern on the liquid crystal display device to project the index or index pattern on the eye to be examined, and a mode switching control unit of the CPU to switch between the first and second mode.

Abstract: Provided is an optometry apparatus capable of checking details of input operation performed by a person to be examined to smoothly perform an examination. The optometry apparatus includes: an optical head portion having a liquid crystal display device for indicating an index such as a Landolt ring to the left eye of the person to be examined; an optical head portion having a liquid crystal display device for indicating an index to the right eye of the person to be examined; a joystick lever for inputting a reply to the indices indicated by the liquid crystal display devices, which is operated by the person to be examined; and a control portion that causes the liquid crystal display devices to display operational detail information indicating operational details of the joystick lever operated by the person to be examined in addition to the indices.

Abstract: An optometric apparatus 2 according to the present invention comprises a body portion 5r provided with an optical system for a right eye for projecting a chart for the right eye in order to inspect visual function of both eye of an examinee and a body portion 5l provided with an optical system for a left eye for projecting a chart for the left eye, the optical systems for the right and left eyes projecting the same fusion patterns to perform fusion of the both eyes of the examinee.

Abstract: A standard white paint with good weather resistance and improvement of reflectivity characteristics for UV as well as adhesion to the substrate is provided. The white standard paint of the present invention contains barium sulfate, binder and solvent in which Polyvinyl alcohol is used as binder. The polymerization degree of the polyvinyl alcohol is ranging from 900 to 1100 and the saponification degree is ranging from 86 mol % to 90 mol %.