Multiple-fiber connector inspection

Patent metadata

Field	Value
Publication number	US-10175142-B2
Application number	US-201615193180-A
Country	US
Kind code	B2
Filing date	Jun 27, 2016
Priority date	Jul 2, 2015
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

An inspection system for inspecting a multiple-fiber connector is provided. The inspection system includes a microscope probe and a probe tip configured to provide an optical path between the microscope probe and the multiple-fiber connector. The probe tip and microscope probe are configured so that the field of view of the microscope probe is sufficiently large to cover a portion of the connector surface encompassing a plurality of the optical fiber endfaces. The system further includes a shifting mechanism operable to shift the field of view of the microscope probe between at least two discrete positions over the connector surface. Each discrete position encompasses a different subset of the multiple optical fiber endfaces and optionally at least one positioning reference. A probe tip and a method of inspection are also provided.

First claim

The invention claimed is:

1. An inspection system for inspecting a multiple-fiber connector comprising an array of optical fiber endfaces over a connector surface, the system comprising:
a microscope probe having a field of view;
a probe tip configured to provide an optical path between the microscope probe and the multiple-fiber connector, and comprising a mating interface configured to interface with the multiple-fiber connector, the probe tip and microscope probe being configured such that the field of view of the microscope probe at the mating interface is sufficiently large to cover a portion of the connector surface encompassing a plurality of the optical fiber endfaces; and
a shifting mechanism operable to shift the field of view of the microscope probe between at least two discrete positions over the connector surface when the mating interface of the probe tip is interfaced with the multiple-fiber connector, each of the at least two discrete positions encompassing a different subset of the multiple optical fiber endfaces, one or more of the at least two discrete positions further encompassing at least one positioning reference.

2. The inspection system according to claim 1 , wherein one or more of the at least two discrete positions further encompassing at least one positioning reference.

3. The inspection system according to claim 2 , wherein the positioning reference is a portion of the connector surface adjacent the array of optical fiber endfaces.

4. The inspection system according to claim 1 , wherein the at least two discrete positions consist of two discrete positions covering respective half portions of the connector surface.

5. The inspection system according to claim 1 , wherein the at least two discrete positions respectively cover end portions of the connector surface and at least one intermediate portion therebetween.

6. The inspection system according to claim 1 , wherein the at least two discrete positions consist of four discrete positions covering respective quadrant portions of the connector surface.

7. The inspection system according to claim 1 , wherein the shifting mechanism comprises:
An optical element in said optical path between the microscope probe and the multiple-fiber connector;
An optical element support mounted in the probe tip and receiving the optical element therein and movable to move the optical element so as to shift the field of view of the microscope probe between the at least two discrete positions.

8. The inspection system according to claim 7 , wherein the optical element support is rotatable between pre-set angular positions about a rotation axis substantially normal to the mating interface.

9. The inspection system according to claim 8 , wherein the optical element and optical element support are configured such that an optical axis of said optical element extends parallel to and offset the rotation axis of the optical element support.

10. The inspection system according to claim 7 , wherein the shifting mechanism further comprises a push-pull mechanism cooperating with the movable support to rotate the same.

11. The inspection system according to claim 10 , wherein the push-pull mechanism comprises:
a rotatable cylindrical housing in which is mounted the at least one optical element, the cylindrical housing having an outer surface provided with a groove defining a path;
an inner sleeve integral with or rigidly affixed to the mating interface of the probe tip and receiving the cylindrical housing therein;
an outer sleeve rigidly connected to the microscope probe and surrounding the inner sleeve, the outer housing having one or more guiding pins projecting inwardly and engaged in the groove of the cylindrical housing, the guiding pin extending through a slit in the inner sleeve; and
a resilient element biasing the outer sleeve against the inner sleeve.

12. The inspection system according to claim 1 , wherein the shifting mechanism comprises:
a cylindrical housing in which is mounted the at least one element;
an inner sleeve integral with or rigidly affixed to the mating interface of the probe tip, the inner sleeve defining a cavity having a cavity wall and receiving the cylindrical housing therein;
an outer sleeve provided in a sliding engagement over the inner sleeve;
at least one pairs of alignment guides provided transversally through the outer sleeve and the inner sleeve, the alignment guides of each pair being disposed opposite each other and have corresponding extremities projecting inside the cavity equidistantly with respect to the cavity wall;

wherein the cylindrical housing has a profiled outer surface defining matching curved shapes on opposite transversal sides of the cylindrical housing in alignment with each pair of alignment guides.

13. The inspection system according to claim 1 , wherein the shifting mechanism comprises a swivel coupler allowing a relative rotation between the microscope probe and the multiple-fiber connector.

14. A probe tip connectable to a microscope probe for inspecting a multiple-fiber connector comprising an array of optical fiber endfaces over a connector surface, the microscope probe having a field of view, the probe tip comprising:
a mating interface configured to interface with the multiple-fiber connector, the probe tip being configured so that the field of view of the microscope probe at the mating interface is sufficiently large to cover a portion of the connector surface encompassing a plurality of the optical fiber endfaces; and
a shifting mechanism operable to shift the field of view of the microscope probe between at least two discrete positions over the connector surface when the mating interface is interfaced with the multiple-fiber connector, each of the at least two discrete positions encompassing a different subset of the multiple optical fiber endfaces.

15. The probe tip according to claim 14 , wherein one or more of the at least two discrete positions further encompassing at least one positioning reference.

16. The probe tip according to claim 15 , wherein the positioning reference is a portion of the connector surface adjacent the array of optical fiber endfaces.

17. The probe tip according to claim 14 , wherein the at least two discrete positions consist of two discrete positions covering respective half portions of the connector surface.

18. The probe tip according to claim 14 , wherein the at least two discrete positions respectively cover end portions of the connector surface and at least one intermediate portion therebetween.

19. The probe tip according to claim 14 , wherein the at least two discrete positions consist of four discrete positions covering respective quadrant portions of the connector surface.

20. A method for inspecting a multiple-fiber connector comprising an array of optical fiber endfaces over a connector surface, the method comprising:
acquiring an image of a portion of the connector surface of the multiple-fiber connector using an inspection system comprising a microscope probe and having a field of view on the connector surface, the imaged portion being defined by a first discrete position of the field of view of the microscope probe and encompassing a plurality of the optical fiber endfaces;
shifting the field of view of the microscope probe to a second discrete position over the connector surface, each of the first and second discrete positions encompassing a different subset of the multiple optical fiber endfaces; and
acquiring an image of another portion of the

Assignees

• Exfo Inc

Inventors

• Lafrance Denis
• Ruchet Bernard
• Baribault Robert

Classifications

• H04B10/25

  Arrangements specific to fibre transmission · CPC title

• G02B21/0016 Primary

  Technical microscopes, e.g. for inspection or measuring in industrial production processes · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/555

  for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes · CPC title

• G06T2207/10056

  Microscopic image · CPC title