Abstract: A connector mating structure includes a male connector and a female connector mated with each other. The female connector includes a mating securing member. In a state where the male connector and the female connector of the connector mating structure are in a mating state and the mating securing member is positioned in a mating securing position, a forward end of a female locking section is positioned between an upper locking protrusion and a protrusion of an upper locking section. In this manner, assembling instability between a male housing, a female housing and the mating securing member in a forward-rearward direction is suppressed. Furthermore, a short circuit spring is in elastic contact with a short circuit release section and thus presses the female housing upward. In this manner, assembling instability between the male housing, the female housing and the mating securing member in an upward-downward direction is suppressed.

Abstract: An optical fiber that has no bubbles in the ultraviolet ray curable resin filled inside the air holes to seal the end parts thereof, an end part processing method of the optical fiber, and an end part processing apparatus of the optical fiber, are provided. In an end part processing method of an optical fiber that is comprised of a core and a cladding formed around the core, the cladding having a refraction index lower than that of the core and has a plurality of air holes formed therein along the axis of the core, wherein the end part process of the optical fiber is to form sealed portions on the ends of the air holes by sealing them with ultraviolet ray curable resin, the method is characterized in that the sealed portion is formed by heating the end of the optical fiber.

Abstract: A bond layer 11 is formed by thermally spraying a Ni—Al alloy on a worn portion of a member 10, and thereafter, a buildup layer 12 is formed by thermally spraying a stainless steel onto the bond layer 11.

Abstract: An optical fiber that has no bubbles in the ultraviolet ray curable resin filled inside the air holes to seal the end parts thereof, an end part processing method of the optical fiber, and an end part processing apparatus of the optical fiber, are provided. In an end part processing method of an optical fiber that is comprised of a core and a cladding formed around the core, the cladding having a refraction index lower than that of the core and has a plurality of air holes formed therein along the axis of the core, wherein the end part process of the optical fiber is to form sealed portions on the ends of the air holes by sealing them with ultraviolet ray curable resin, the method is characterized in that the sealed portion is formed by heating the end of the optical fiber.