Abstract: An audio spot forming system (S) is an audio spot forming system which transmits an alert sound to a vehicle traveling on a road, the audio spot forming system including a first parametric speaker (1) configured to emit a sideband wave, and a second parametric speaker (2) configured to emit a carrier wave, in which the sideband wave and the carrier wave are caused to intersect with each other on the road to form an audio spot.

Abstract: In an audio spot formation device D including a speaker unit 1 and a support stand 2 that supports the speaker unit 1, the speaker unit 1 includes a plurality of parametric speakers 1a, 1b, 1c and 1d that divide a sound wave into a carrier wave and a sideband wave and radiate the carrier wave and the sideband wave, and a speaker disposition unit 10 in which the plurality of speakers 1a, 1b, 1c and 1d are disposed, the speaker disposition unit 10 is attached to the support stand 2 at a support unit P, at least one of a height of the support stand 2, an angle of attachment of the speaker disposition unit 10 at the support unit P and a direction of at least one parametric speaker of the plurality of parametric speakers 1a, 1b, 1c and 1d is adjustable, and a position at which an audio spot is formed is adjusted via the adjustment.

Abstract: A method of manufacturing an incorporated ferrule (13) with attenuation optical fiber comprising the step of cutting off a long capillary with an attenuation optical fiber (6) into a plurality of short capillaries (12) with attenuation optical fiber of specified lengths, and polishing the end faces (12a) and (12b) of the short capillaries (12) with attenuation optical fiber.

Abstract: An optical connector plug has a front housing 1, a rear housing 2, a ferrule 3, a coil spring 4 and an optical cord fixing member 5, and in addition to the ferrule 3 and the coil spring 4, the optical cord fixing member 5 for fixing a tension resistive member and a cord outer jacket is received and held within an internal through space defined when the front housing 1 and the rear housing 2 are coupled. Also, upon assembling the optical connector plug, assembling of these members 1 to 5 can be realized by movement in an axial direction as much as possible. Accordingly, assembling of the optical connector plug is facilitated and suitable for automatic assembling.

Abstract: A plug frame for an optical connector component comprising a ferrule for receiving an end portion of a core optical fiber of a fiber optic cable and a plug frame for floatingly supporting the ferrule. The plug frame is configured as a one-piece component. This allows reduction of the number of component parts and assembling steps, simplification of the assembling operations and reduction of the manufacturing cost.

Abstract: Disclosed is an optical connector component 31 comprising a ferrule 2 for receiving an end portion of a core optical fiber of a fiber optic cable, a flange 32 mounted on the peripheral of the ferrule 2, and a one-piece plug frame 33 for floatingly supporting the ferrule 2 having the flange 32 mounted thereon. The flange 32 and the plug frame 33 are provided with respective engagement portions 37, 50 that are mutually engaged. The flange 32 has such resiliency that it is reduced in diameter by a radial and inward force exerted through the engagement portions 37, 50 when the ferrule 2 is inserted into the plug frame 33 from one end thereof and the flange 32 is restored to the original condition present before the insertion when the engagement portions 37, 50 are mutually engaged.

Abstract: Disclosed is a plug frame 33 for an optical connector component 31 comprising a ferrule 2 for receiving an end portion of a core optical fiber of a fiber optic cable and a plug frame 33 for floatingly supporting the ferrule 2. According to the present invention the plug frame 33 is configured as a one-piece component. This allows reduction of the number of component parts and assembling steps, simplification of the assembling operations and reduction of the manufacturing cost.

Abstract: Disclosed is an optical connector component 31 comprising a ferrule 2 for receiving an end portion of a core optical fiber of a fiber optic cable, a flange 32 mounted on the peripheral of the ferrule 2, and a one-piece plug frame 33 for floatingly supporting the ferrule 2 having the flange 32 mounted thereon. The flange 32 and the plug frame 33 are provided with respective engagement portions 37, 50 that are mutually engaged. The flange 32 has such resiliency that it is reduced in diameter by a radial and inward force exerted through the engagement portions 37, 50 when the ferrule 2 is inserted into the plug frame 33 from one end thereof and the flange 32 is restored to the original condition present before the insertion when the engagement portions 37, 50 are mutually engaged.

Abstract: An optical connector plug has a front housing 1, a rear housing 2, a ferrule 3, a coil spring 4 and an optical cord fixing member 5, and in addition to the ferrule 3 and the coil spring 4, the optical cord fixing member 5 for fixing a tension resistive member and a cord outer jacket is received and held within an internal through space defined when the front housing 1 and the rear housing 2 are coupled. Also, upon assembling the optical connector plug, assembling of these members 1 to 5 can be realized by movement in an axial direction as much as possible. Accordingly, assembling of the optical connector plug is facilitated and suitable for automatic assembling.

Abstract: A plastic ferrule for an optical connector comprises a cylindrical portion having one insertion hole for fixing an optical fiber and directly related to connection, a holding portion for allowing the cylindrical portion to be stably held in an optical connector, and an guiding portion for allowing an optical fiber to be guided into the ferrule. The ferrule has a hollow, cylindrical hole centering around the insertion hole inside the cylindrical portion. Thus, the ferrule has excellent dimensional accuracy of the outer diameter, and achieves connection of single mode fibers excellent in connection reliability and economy.