The invention relates to a brush grinding head (1) for a grinding machine (2), comprising an essentially roller-shaped carrier (3) and grinding lamellae (4), wherein the grinding lamellae (4) are arranged peripherally on the carrier (3) and are composed at least of, in particular bundled brushes (5) and an essentially strip-shaped grinding element (6) which is arranged adjacent thereto. The grinding element (6) comprises at least one abrasive layer (7) and an abrasive-free layer (8) which can be compressed while retaining its shape and is designed in such a way that a grinding fluid (27), in particular water, can be stored in it.

Provided is an optical fiber ferrule polishing jig capable of fixing an optical fiber ferrule and releasing the optical fiber ferrule. An optical fiber ferrule polishing jig 10A has; a base 12a having insertion holes 20 into which optical fiber ferrules 51 can be detachably inserted; pivoting rods 13 which are adjacent to the insertion holes 20 of the base 12a and rotatable around lower end portions 36; fixing pieces 14a installed in installation recesses 19a formed in the base 12a to fix the optical fiber ferrules 51 with respect to the insertion holes 20 by being moved as the rods are pivoted; and a plurality of coil springs 15a installed in the installation recesses 19a to bias the fixing pieces 14a so as to release fixing of the optical fiber ferrules 51 with respect to the insertion holes 20.

A method includes: (a) actively cooling an outer surface of a workpiece until the outer surface reaches a predetermined surface temperature; and (b) sanding the outer surface of the workpiece when the outer surface of the workpiece has reached the predetermined surface temperature.

A method includes: (a) actively cooling an outer surface of a workpiece until the outer surface reaches a predetermined surface temperature; and (b) sanding the outer surface of the workpiece when the outer surface of the workpiece has reached the predetermined surface temperature.

A polishing method and a polishing film are provided for automatically performing multi-stage batch polishing on an end surface of a workpiece. An end surface of a workpiece and a polishing plate are moved relative to each other while bringing the end surface of the workpiece into contact with a polishing film of the polishing plate. The end surface is moved in a circular motion with a diameter 2 R relative to the polishing film; the center of the circular motion is moved linearly by a distance S on the polishing film; the polishing film is provided with first, second, and third polishing surfaces; and the polishing film is further provided with cleaning surfaces between the polishing surfaces so that the range of the distance S in which one rotation in the circular motion crosses over different polishing surfaces is reduced, or does not cross over different polishing surfaces.

A polishing sheet capable of reducing recesses formed at the core of the end surface of an optical fiber, and a manufacturing method for an optical fiber connector using the polishing sheet are provided. The method includes a step of the final polishing of an optical fiber ferrule assembly in which an optical fiber protrudes from the end surface of a ferrule, the protruding optical fiber having a recess in the tip end core. During the final polishing step, the optical fiber having the recess in the core is inserted into a flocked portion of a flocked polishing sheet. The optical fiber ferrule assembly and the flocked polishing sheet are disposed opposite one another and moved relatively to each other in order to polish the optical fiber. Fibers constituting the flocked portion have silica particles with an average particle diameter from 0.01 m to 0.1 m adhered to the surface.

An optical sub-module comprises a lens and a optical fiber ferrule assembled with the lens, the lens comprises a receiving hole receiving the optical fiber ferrule; wherein the optical fiber ferrule includes a mating surface mating with the lens and a refractive index matching epoxy disposed on the mating surface for reducing optical return loss, and the mating surface has an APC-type end.

Carbon atoms of a single-crystal diamond and active abrasives are used to produce a chemical reaction to form carbides under a specific grinding condition of no higher than a graphitization temperature, and a hard abrasive is used to remove the carbides.

Carbon atoms of a single-crystal diamond and active abrasives are used to produce a chemical reaction to form carbides under a specific grinding condition of no higher than a graphitization temperature, and a hard abrasive is used to remove the carbides.

An optical fiber polishing machine includes at least one of a media exchange assembly and a cleaning assembly. The media exchange assembly comprises a media exchange platen configured and arranged to support polishing media and an exchange arm having a media engaging assembly configured and arranged to selectively engage the polishing media and configured and arranged to move between the media exchange platen and a polishing machine platen. The cleaning assembly comprises an arm, a housing operatively connected to the arm, a nozzle operatively connected to the housing, and at least one of a water inlet and an air inlet in communication with the nozzle. The arm is configured and arranged to move the housing between first and second positions. The second position is proximate the fixture so that at least one of water and air dispensed through the nozzle during a cleaning process contacts the fixture.