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 has a ferrule comprises of a cylindrical body for supporting an optical fiber, and a flange member having an end portion connected to a first end of the cylindrical body and a flange part projecting from the end portion. A holding member supports the ferrule and has an engaging part. A rotation positioning part is formed in the flange part of the flange member for positioning the flange part relative to the holding member to provide a first clearance between the rotation positioning part and the engaging part of the holding member for restricting rotation of the ferrule about the fiber optical axis relative to the holding member. A rotation allowing part is formed in the flange part of the flange member and spaced from the engaging part of the holding member to provide a second clearance therebetween greater than the first clearance for allowing rotational movement of the ferrule so as to permit the ferrule to incline in a direction transverse to an axis of the optical connector.

Abstract: A cleaning tool for an optical connector includes a cylindrical cleaner and a holding member for holding a proximal portion of the cleaner. The cleaner has a main body with a ferrule insertion hole extending from a ferrule insertion port at its distal end face toward the proximal end of the cleaner. The ferrule insertion hole has an inner diameter substantially the same as an outer diameter of a ferrule. The ferrule insertion hole is surrounded by a rough surface so as to clean an outer surface of the ferrule which is to be inserted.

Abstract: The cleaning tool for optical fiber connectors has cleaning sheet laminated to the bottom surface of a front plate. A plurality of rows of slit shaped windows are opened through the front plate. Peel-off sheet is attached to the front plate to close off the windows. Peel-off sheet sealing off the windows is removed to open a window, an optical fiber connector is moved within the exposed window, and the connecting surface of the optical fiber connector is cleaned by the cleaning sheet.

Abstract: Provided is a PC connector to be removed of useless stress during attached/detached thus being stably attached/detached. A flange part is provided in a polygonal or disk form circumferentially projecting on the flange member at a tip side thereof. In a holding part holding the flange member, an engaging part is formed axially of the optical fiber and in a predetermined engaging width. The flange part has a predetermined clearance to the engaging part at an axial tip side thereof. A rotation positioning part restricts a movement in rotational direction of the flange part. A rotation allowing part is provided to form, on a rear-end side of the rotation positioning part, a clearance greater than the clearance of between the rotation positioning part and the engaging part.

Abstract: A cleaning tool for an optical connector cleans a connecting end face of a ferrule fixed to an optical connecting plug, and includes a cleaning sheet and a plug holding member. The cleaning sheet cleans the connecting end face of the ferrule. The plug holding member holds the optical connecting plug such that the connecting end face of the ferrule comes into contact with the cleaning sheet to be parallel to it.

Abstract: A cleaning tool for an optical connector cleans a connecting end face of a ferrule fixed to an optical connecting plug, and includes a cleaning sheet and a plug holding member. The cleaning sheet cleans the connecting end face of the ferrule. The plug holding member holds the optical connecting plug such that the connecting end face of the ferrule comes into contact with the cleaning sheet to be parallel to it.

Abstract: A cleaning tool for an optical connector includes a cylindrical cleaner and a holding member for holding a proximal portion of the cleaner. The cleaner has a main body with a ferrule insertion hole extending from a ferrule insertion port at its distal end face toward the proximal end of the cleaner. The ferrule insertion hole has an inner diameter substantially the same as an outer diameter of a ferrule. The ferrule insertion hole is surrounded by a rough surface so as to clean an outer surface of the ferrule which is to be inserted.

Abstract: A cleaning tool for cleaning optical fiber connectors exposes a cleaning sheet in a window of the case. A winding pulley is operable to wind the cleaning sheet upon rotation at a constant pitch. A rotation mechanism, that is operated by a lever, rotates the winding pulley. The case is constructed of a first front plate and a second front plate which are closed off by a perimeter wall along their outer circumference. The case has an open portion in a part of the perimeter wall, and the lever is disposed in the open portion in an inclined orientation.

Abstract: The cleaning tool for optical fiber connectors exposes the cleaning sheet in the window for cleaning of the case. The winding pulley winds the cleaning sheet with rotating in a constant pitch. A rotation mechanism operated by lever rotates the winding pulley. In the case, a first front plate and a second front plate is closed off by a perimeter walls along their outline. The case has the opened portion opening a part of the perimeter wall, and the lever is disposed in the opened portion to be able to incline.