Abstract: A measurement system includes a measurement device including a light source, and a first power meter, and one or a plurality of connection members each configured to optically connect a pair of optical fiber lines of the plurality of optical fiber lines. A first optical fiber line of the pair of optical fiber lines includes a first end and a second end, a second optical fiber line of the pair of optical fiber lines includes a third end and a fourth end, the one or plurality of connection members optically connect the second end to the fourth end, the light source causes testing light to be incident on the first end, and the first power meter measures first intensity of first output light output from the third end by causing the testing light to propagate through the pair of optical fiber lines.

Abstract: A detection mechanism includes a light source disposed on a substrate, a condensing lens disposed between the substrate and light emitted from the light source, and a photodetector disposed on the substrate and under the condensing lens.

Abstract: A detection mechanism includes a light source disposed on a substrate, a condensing lens disposed between the substrate and light emitted from the light source, and a photodetector disposed on the substrate and under the condensing lens.

Abstract: A detection device according to an aspect of the invention, includes: a housing including an air intake port and an air discharge port; a platelike member having a first air ventilation port and a second air ventilation port, the platelike member being provided inside the housing; a first sensor provided on an air intake port side of the first air ventilation port on a front face of the platelike member; and a second sensor provided between the first air ventilation port and the second air ventilation port on a rear face of the platelike member.

Abstract: A detection mechanism includes a light source disposed on a substrate, a condensing lens disposed between the substrate and light emitted from the light source, and a photodetector disposed on the substrate and under the condensing lens.

Abstract: [Object] To provide a particle detection sensor that is compact-and-flat designed and manufacturable at low cost. [Solution] A particle detection sensor (1) includes light transmissive resin (5) that encapsulates a light emitting element (3) and a light receiving element (6), and a reflective surface (7) that is arranged on the light transmissive resin (5) and reflects output light (8) radiated from the light emitting element (3) toward an incident light field area (10).

Abstract: [Object] To provide a particle detection sensor that is compact-and-flat designed and manufacturable at low cost. [Solution] A particle detection sensor (1) includes light transmissive resin (5) that encapsulates a light emitting element (3) and a light receiving element (6), and a reflective surface (7) that is arranged on the light transmissive resin (5) and reflects output light (8) radiated from the light emitting element (3) toward an incident light field area (10).

Abstract: An exhaust flue includes an exhaust chimney body, and an open end multi-hole area. The exhaust chimney body defines a passage for discharging exhaust gas. The open end multi-hole area is an area in which multiple holes are defined around a total circumference of an open end of the exhaust chimney body.

Abstract: An exhaust flue (40) includes an exhaust chimney body (43), and an open end multi-hole area (51). The exhaust chimney body (43) is a passage for discharging exhaust gas. The open end multi-hole area (51) is an area in which multiple holes (50) have been opened around the total circumference of an open end (44) of the exhaust chimney body (43). The exhaust flue (40) is capable of minimizing the release of noises with low-frequency components to the outside by means of a simple construction in which holes (50) are opened in the exhaust chimney body (43).

Abstract: The present invention provides a coin depositing and dispensing machine 11 that can be continuously used without going out-of-service even if a failure occurs in a certain storing and dispensing portion. Among a plurality of storing and dispensing portions 22 to 27, denominations of coins to be stored are assigned to the storing and dispensing portions 22 to 25, respectively, and no denomination is assigned to the storing and dispensing portions 26 and 27. When a failure occurs in one of the storing and dispensing portions 22 to 25, the assignment of a denomination related to the failure is changed from the storing and dispensing portion in which the failure occurred to either one of the storing and dispensing portion 26 and 27 to which no denomination is assigned.

Abstract: To provide a vehicle rear-view mirror equipped with a display device, configured so that: a warning indication is easy to see from the driver and is hard to see from following vehicles and vehicles on the adjacent lanes; and when no warning is indicated, no discontinuities occur in the rear-area image reflected in the mirror and the warning symbol is unnoticeable. A mirror element 18 is configured by forming a semi-transmissive reflective film 24 or 56 formed of a dielectric multilayer film on the back or front surface of a transparent glass substrate 22. A dark color mask member 26 is arranged on the back surface of the mirror element 18. An opening 26a is formed on the mask member 26. A light-orienting tube 28 is arranged in such a manner that it protrudes in the backward direction of the mask member 26 so as to surround the opening 26a. The tube axis 28a of the light-orienting tube 28 is inclined in the direction toward the driver's viewpoint.

Abstract: The present invention provides a coin depositing and dispensing machine 11 that can be continuously used without going out-of-service even if a failure occurs in a certain storing and dispensing portion. Among a plurality of storing and dispensing portions 22 to 27, denominations of coins to be stored are assigned to the storing and dispensing portions 22 to 25, respectively, and no denomination is assigned to the storing and dispensing portions 26 and 27. When a failure occurs in one of the storing and dispensing portions 22 to 25, the assignment of a denomination related to the failure is changed from the storing and dispensing portion in which the failure occurred to either one of the storing and dispensing portion 26 and 27 to which no denomination is assigned.

Abstract: To provide a vehicle rear-view mirror equipped with a display device, configured so that: a warning indication is easy to see from the driver and is hard to see from following vehicles and vehicles on the adjacent lanes; and when no warning is indicated, no discontinuities occur in the rear-area image reflected in the mirror and the warning symbol is unnoticeable. A mirror element 18 is configured by forming a semi-transmissive reflective film 24 or 56 formed of a dielectric multilayer film on the back or front surface of a transparent glass substrate 22. A dark color mask member 26 is arranged on the back surface of the mirror element 18. An opening 26a is formed on the mask member 26. A light-orienting tube 28 is arranged in such a manner that it protrudes in the backward direction of the mask member 26 so as to surround the opening 26a. The tube axis 28a of the light-orienting tube 28 is inclined in the direction toward the driver's viewpoint.

Abstract: An optical communication apparatus in which bidirectional communication may be made over a sole optical fiber. A light emitting device (132) radiates light through an optical system (133) to an optical fiber (76). The light transmitted from the optical fiber (76) is received over optical system (133) by a light receiving device (136). In the optical system (133), such a relationship S?2QN?M>S/2Q?N is set, where M is the light volume of the stray light emitted, Q is the value of a Q-value representing the communication quality as required, S is the light volume of a received signal from a communication partner and N is the sum total of the Gaussian noise.

Abstract: A gas turbine exhaust passage is realized which may suppress the radiation of strong ultra low frequency noise to the outside without amplifying the turbulence of an high speed exhaust gas flow rate or a pressure pulsation generated in a gas turbine. At least a portion of a wall of a gas turbine exhaust passage (3, 5) is formed of an acoustically transmissive material (36, 56) for allowing a low frequency noise of several tens of Hz or less to pass therethrough sufficiently. Also, the acoustically transmissive material is made of one or more of a porous material, a porous heat insulating material, a mesh having a large flow resistance, cloth or film material. Further, the acoustically transmissive material is supported by a porous plate or a frame. In a case where an acoustically transmissive material is used only for an exhaust chimney (5), the exhaust chimney (5) is supported by a rack (11). Further, a soundproof panel (12) may be attached to the rack (11).

Abstract: A gas turbine exhaust passage is realized which may suppress the radiation of strong ultra low frequency noise to the outside without amplifying the turbulence of an high speed exhaust gas flow rate or a pressure pulsation generated in a gas turbine. At least a portion of a wall of a gas turbine exhaust passage (3, 5) is formed of an acoustically transmissive material (36, 56) for allowing a low frequency noise of several tens of Hz or less to pass therethrough sufficiently. Also, the acoustically transmissive material is made of one or more of a porous material, a porous heat insulating material, a mesh having a large flow resistance, cloth or film material. Further, the acoustically transmissive material is supported by a porous plate or a frame. In a case where an acoustically transmissive material is used only for an exhaust chimney (5), the exhaust chimney (5) is supported by a rack (11). Further, a soundproof panel (12) may be attached to the rack (11).

Abstract: A gas turbine exhaust passage is realized which may suppress the radiation of strong ultra low frequency noise to the outside without amplifying the turbulence of an high speed exhaust gas flow rate or a pressure pulsation generated in a gas turbine. At least a portion of a wall of a gas turbine exhaust passage (3, 5) is formed of an acoustically transmissive material (36, 56) for allowing a low frequency noise of several tens of Hz or less to pass therethrough sufficiently. Also, the acoustically transmissive material is made of one or more of a porous material, a porous heat insulating material, a mesh having a large flow resistance, cloth or film material. Further, the acoustically transmissive material is supported by a porous plate or a frame. In a case where an acoustically transmissive material is used only for an exhaust chimney (5), the exhaust chimney (5) is supported by a rack (11). Further, a soundproof panel (12) may be attached to the rack (11).

Abstract: In an optical receiver circuit chip, which constitutes an optical fiber link and converts a received optical signal into an electrical signal for communication, shutdown function is added to a bias circuit, which supplies power to an internal circuit such as a photodiode, amplifiers, a comparator and a buffer. Furthermore, a shutdown control circuit is provided in order to cause the bias circuit to perform a shutdown control in response to whether or not a plug for a transmission medium such as an optical fiber is inserted to a corresponding jack and in response to an shutdown signal inputted to a shutdown input terminal in accordance with user's operation. Therefore, the shutdown control can be realized with lower cost and smaller substrate space compared with a case where a regulator IC is separately used.

Abstract: A gas turbine exhaust passage is realized which may suppress the radiation of strong ultra low frequency noise to the outside without amplifying the turbulence of an high speed exhaust gas flow rate or a pressure pulsation generated in a gas turbine. At least a portion of a wall of a gas turbine exhaust passage (3, 5) is formed of an acoustically transmissive material (36, 56) for allowing a low frequency noise of several tens of Hz or less to pass therethrough sufficiently. Also, the acoustically transmissive material is made of one or more of a porous material, a porous heat insulating material, a mesh having a large flow resistance, cloth or film material. Further, the acoustically transmissive material is supported by a porous plate or a frame. In a case where an acoustically transmissive material is used only for an exhaust chimney (5), the exhaust chimney (5) is supported by a rack (11). Further, a soundproof panel (12) may be attached to the rack (11).

Abstract: A gas turbine exhaust passage is realized which may suppress the radiation of strong ultra low frequency noise to the outside without amplifying the turbulence of an high speed exhaust gas flow rate or a pressure pulsation generated in a gas turbine. At least a portion of a wall of a gas turbine exhaust passage (3, 5) is formed of an acoustically transmissive material (36, 56) for allowing a low frequency noise of several tens of Hz or less to pass therethrough sufficiently. Also, the acoustically transmissive material is made of one or more of a porous material, a porous heat insulating material, a mesh having a large flow resistance, cloth or film material. Further, the acoustically transmissive material is supported by a porous plate or a frame. In a case where an acoustically transmissive material is used only for an exhaust chimney (5), the exhaust chimney (5) is supported by a rack (11). Further, a soundproof panel (12) may be attached to the rack (11).