公开(公告)号：US20210001444A1

公开(公告)日：2021-01-07

申请号：US16978321

申请日：2018-03-06

Applicant: NTT Advanced Technology Corporation

Inventor： Naoki Sugita ,  Toshinori Kimura ,  Masaaki Konishi ,  Kenji Aoki

IPC: B24B41/06 ,  G02B6/38

Abstract: In a polishing apparatus, an optical connector polishing jig holds the MT ferrule provided at the connection end portion of the optical connector, the optical connector polishing jig includes: a cylinder base; a cylinder shaft held on the cylinder base to be capable of moving in the up-down direction; and a set block connected to an end of the cylinder shaft and having a hole into which the MT ferrule is inserted and in which fixing means for adjusting the pressing force and fixing the MT ferrule is inserted, and a surface of the fixing means that comes into contact with the MT ferrule has a protrusion that partially protrudes to apply a pressing force to the MT ferrule such that when the MT ferrule is fixed, an end surface of the MT ferrule is slightly deformed and a center portion of the end surface in a longitudinal direction swells.

公开(公告)号：US11602820B2

公开(公告)日：2023-03-14

申请号：US16978321

申请日：2018-03-06

Applicant: NTT Advanced Technology Corporation

Inventor： Naoki Sugita ,  Toshinori Kimura ,  Masaaki Konishi ,  Kenji Aoki

IPC: B24B41/06 ,  G02B6/38

Abstract: In a polishing apparatus an optical connector polishing jig holds the MT ferrule provided at the connection end portion of the optical connector, the optical connector polishing jig includes: a cylinder base; a cylinder shaft held on the cylinder base to be capable of moving in the up-down direction; and a set block connected to an end of the cylinder shaft and having a hole into which the MT ferrule is inserted and in which fixing means for adjusting the pressing force and fixing the MT ferrule is inserted, and a surface of the fixing means that comes into contact with the MT ferrule has a protrusion that partially protrudes to apply a pressing force to the MT ferrule such that when the MT ferrule is fixed, an end surface of the MT ferrule is slightly deformed and a center portion of the end surface in a longitudinal direction swells.

公开(公告)号：US20180345440A1

公开(公告)日：2018-12-06

申请号：US15970041

申请日：2018-05-03

Applicant: NTT Advanced Technology Corporation ,  Mipox Corporation

Inventor： Kenji Aoki ,  Naoki Sugita ,  Toshihiro Igawa ,  Mitsunobu Shishido

IPC: B24B19/22 ,  B24B21/00 ,  B24D11/04

CPC classification number: B24B19/00 ,  B24B21/00 ,  B24D11/04

Abstract: 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.

公开(公告)号：US20220219280A1

公开(公告)日：2022-07-14

申请号：US17296351

申请日：2020-08-20

Applicant: NTT Advanced Technology Corporation

Inventor： Kenji Aoki ,  Masaaki Konishi ,  Naoki Sugita

IPC: B24B19/22

Abstract: An embodiment of the invention of this application provides a polishing pad that eliminates a gap between an optical connector and a polishing film during polishing. A polishing pad of the embodiment is used by being placed between a polishing platen and a polishing sheet in a case of performing spherical polishing of an end surface of an optical connector including an optical fiber and a ferrule. The optical connector polishing pad of the embodiment has rebound resilience higher than 20%. The optical connector polishing pad of the embodiment can be formed from a urethane-based material.

公开(公告)号：US10981256B2

公开(公告)日：2021-04-20

申请号：US15970041

申请日：2018-05-03

Applicant: NTT Advanced Technology Corporation ,  Mipox Corporation

Inventor： Kenji Aoki ,  Naoki Sugita ,  Toshihiro Igawa ,  Mitsunobu Shishido

IPC: B24B19/22 ,  B24B19/00 ,  B24B21/00 ,  B24B51/00 ,  B24D11/04 ,  B24B47/12 ,  B24D13/14

Abstract: 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.