Connector with lateral and angular tolerance

Patent metadata

Field	Value
Publication number	US-9989708-B1
Application number	US-201715449522-A
Country	US
Kind code	B1
Filing date	Mar 3, 2017
Priority date	Mar 3, 2017
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A connector having a front and rear origination and configured to mate with a mating connector, said connector comprising a ferrule defining at least one borehole for receiving a fiber, and having a second diameter less than the opening of the housing through which it extends such that a gap is defined between said ferrule and said orifice to allow said ferrule to move within said orifice angularly and laterally with respect to said axis. A sleeve containing a lens is disposed around a portion of said ferrule forward of the opening of the housing and extends beyond the front end of the ferrule.

First claim

What is claimed is:

1. A connector having a front and rear origination and configured to mate with a mating connector, said connector comprising:
a housing having one or more cavities defined therein, and having a front face with one or more orifices defined therein, wherein each of said cavities has an axis, wherein each of said orifices corresponds to one of said cavities and has an inner first diameter;
an optical contact at least partially disposed in one of said cavities, and comprising at least,
a ferrule extending from said cavity and through the orifice corresponding to said cavity, said ferrule defining at least one borehole for receiving a fiber, and having a second diameter less than said first diameter such that a gap is defined between said ferrule and said orifice to allow said ferrule to move within said orifice angularly and laterally with respect to said axis, said second diameter being constant along the length of said ferrule;
a ferrule holder having a front end connected to said ferrule behind said orifice;
a sleeve disposed around a portion of said ferrule, said sleeve disposed in front of said front face and extending from a point forward of said orifice to beyond said front end of said ferrule; and
a lens disposed at least partially in said sleeve and forward of said front face.

2. The connector of claim 1 , further comprising at least one fiber disposed in said borehole.

3. The connector of claim 1 , wherein said ferrule holder defines a rearward facing shoulder and wherein said housing comprises a plurality of complaint finger having distal free ends that extend inwardly into said cavity and contact said shoulder so as to resist rearward movement of said ferrule holder and to compliantly align said optical contact axially with said axis.

4. The connector of claim 3 , wherein said shoulder comprises an annular surface essentially perpendicular to said borehole, said annular surface defining a band width from its inside perimeter to its outside perimeter, wherein said band width is sufficiently wide such that said distal ends move along said band width as said optical contact is moved laterally or angularly relative to said axis.

5. The connector of claim 4 , wherein, when said optical contact is axially aligned with said axis, each of said distal ends contacts said annular surface essentially in the middle of said band width such that each distal end is able to slide inwardly and outwardly as said optical contact is moved laterally and angularly relative to said axis.

6. The connector of claim 1 , wherein said point is sufficiently forward of said orifice such that said sleeve cannot contact said front face when said optical contact is angularly misaligned relative to said axis.

7. The connector of claim 1 , wherein said first diameter of said orifice is about the same as the outer diameter of said sleeve.

8. The connector of claim 1 , wherein said front face has a chamfer around the orifice to allow for annular misalignment of the optical contact in said cavity.

9. The connector of claim 1 , wherein said gap facilitates at least 5° angular movement of said optical contact from said axis.

10. The connector of claim 1 , wherein said gap and said band width facilitate at least 200 μm lateral movement of said optical contact from said axis.

11. The connector of claim 1 , wherein said lens is a ball lens.

12. The connector of claim 11 , wherein said ball lens contacts said fiber.

13. The connector of claim 1 , wherein said sleeve has a front edge which is chamfered.

14. The connector of claim 1 , further comprising an outer sleeve configured to receive said sleeve.

15. The connector of claim 14 , wherein said front edge of said sleeve and both ends of said outer sleeve are chamfered.

16. The connector of claim 1 , wherein said ferrule and said ferrule holder are discrete components.

17. A connector system comprising:
at least two connectors;
and an outer sleeve connecting said two connectors;
wherein each connector of said at least two connectors having a front and rear origination and configured to mate with a mating connector, each connector comprising at least:
a housing having one or more cavities defined therein, and having a front face with one or more orifices defined therein, wherein each of said cavities has an axis, wherein each of said orifices corresponds to one of said cavities and has an inner first diameter;
an optical contact at least partially disposed in one of said cavities, and comprising at least,
a ferrule extending from said cavity and through the orifice corresponding to said cavity, said ferrule defining at least one borehole for receiving a fiber, and having a second diameter less than said first diameter such that a gap is defined between said ferrule and said orifice to allow said ferrule to move within said orifice angularly and laterally with respect to said axis, said second diameter being constant along the length of said ferrule;
a ferrule holder having a front end connected to said ferrule behind said orifice;
a sleeve disposed around a portion of said ferrule, said sleeve disposed in front of said front face and extending from a point forward of said orifice to beyond said front end of said ferrule; and
a lens disposed at least partially in said sleeve and forward of said front face; and

wherein a portion of said sleeve of each connector is disposed in said outer sleeve such that said lens of each connector are optically coupled.

18. The connector system of claim 17 , wherein said outer sleeve is chamfered.

Assignees

• Te Connectivity Corp

Inventors

• Grinderslev Soren

Classifications

• G02B6/3818 Primary

  of a low-reflection-loss type (G02B6/3813 takes precedence) · CPC title

• G02B6/3875 Primary

  Floatingly supported sleeves · CPC title

• G02B6/3853

  Lens inside the ferrule (lensed connectors G02B6/32) · CPC title

• G02B6/3869

  Mounting ferrules to connector body, i.e. plugs · CPC title

• G02B6/32

  having lens focusing means {positioned between opposed fibre ends (with lens being an integral part of the single fibre end G02B6/262)} · CPC title