# US 5,349,784 A · Optical fiber polishing apparatus

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- Number: US 5,349,784 A
- Document ID: US5349784A
- Status: Granted
- Kind: A
- Application number: 07/911,837
- Filed: 1992-07-10
- Granted: 1994-09-27
- Earliest claimed: 1992-07-10
- Assignees: Molex Incorporated
- Inventors: Igor Grois; Ilya Makhlin; Mark Margolin
- Web page: https://patentgrep.com/patent/US5349784A

## CPC

- B24B 19/226: {of the ends of optical fibres}
- B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS

## Abstract

An apparatus is provided for polishing the end face of an optical fiber encapsulated within a ferrule portion of a fiber optic connector device which terminates the optical fiber. The end of the optical fiber projects from the ferrule portion. A mounting plate has a forward surface and a receptacle for mounting the connector device, with the end of the optical fiber projecting from the forward surface, to permit the end face to be polished by moving the mounting plate over an appropriate polishing surface. A polishing plate forms a substrate having a recess in a forward surface thereof. A polishing film is adhered to the substrate, spanning the recess, to define an air space beneath the film in the recess. Therefore, the mounting plate can be positioned over the polishing plate to align the end of the optical fiber with the recess, in engagement with the polishing film spanning the recess, to permit the end face of the optical fiber to be polished by moving the forward surfaces of the mounting plate and the polishing plate relative to each other.

## Claims

### Claim 1

An apparatus for polishing an end face of an optical fiber located within a ferrule portion of a fiber optic connector device the end face located on an end of the optical fiber projecting from the ferrule portion, comprising:
mounting means having a forward surface and a receptacle for mounting the connector device with the end of the optical fiber projecting from the forward surface to permit the end face to be polished by moving the mounting means over an appropriate polishing surface, wherein said receptacle is configured for receiving and holding the ferrule portion of the fiber optic connector device and comprises a resilient sleeve, wherein said sleeve is generally cylindrical and is at least in part axially and radially slit to provide resiliency for gripping the ferrule portion; and
polishing means including a substrate having a recess in a forward surface thereof, and a polishing film on the substrate the polishing film having adhesive means on a back side thereof for adhering to the forward surface of the substrate, spanning the recess to define an air space in the recess beneath the film confining air present in the recess,
whereby the mounting means can be positioned over the polishing means to align the end of the optical fiber with the recess, in engagement with the polishing film spanning the recess, to permit the end face of the optical fiber to be polished by moving the forward surfaces of the mounting means and the polishing means relative to each other.

### Claim 2 (depends on 1)

The apparatus of claim 1 wherein said polishing film has a lapping compound on a forward side thereof for engagement by the end face of the optical fiber.

### Claim 3 (depends on 1)

The apparatus of claim 1 wherein said mounting means include spring means for spring loading the receptacle to permit yielding of the receptacle and of the end of the optical fiber on engagement with the polishing film.

### Claim 4 (depends on 1)

The apparatus of claim 1 wherein said mounting means include spring means effective to spring load the resilient sleeve to permit yielding of the resilient sleeve and of the end of the optical fiber on engagement with the polishing film.

### Claim 5

In an apparatus for polishing an end face of an optical fiber located within a ferrule of a fiber optic connector device, the end face located on an end of the optical fiber projecting from the ferrule, the apparatus including mounting means having a forward surface and receptacle means for mounting the connector device with the end of the optical fiber projecting from the forward surface to permit the end face to be polished by moving the mounting means over an appropriate polishing surface, wherein the improvement comprises said receptacle means including a resilient sleeve wherein said sleeve is generally cylindrical and is at least in part axially and radially slit to provide resiliency therefor for gripping the ferrule of the connector device.