Swivelling optical connector for joining optical fiber to components and sensor including such connector

• US 5,095,517 A
• Filed: 02/19/1991
• Issued: 03/10/1992
• Est. Priority Date: 02/20/1990
• Status: Expired due to Fees

• Current Assignee: Pirelli Cavi S.p.A. (Pirelli & C SPA)
• Original Assignee: Pirelli Cavi S.p.A. (Pirelli & C SPA)
• Inventors: Monguzzi, Luigi, Moreni, Giancarlo, Simonelli, Francesco
• Primary Examiner(s): Healy, Brian
• Application Number:
  US07/657,425
• Time in Patent Office: 385 Days
• Field of Search: 350/96.20, 350/96.21, 350/96.18, 350/96.22, 250/227.11, 250/227.28, 385/33, 385/52, 385/74, 385/84, 385/12, 385/90, 385/91, 385/93, 385/25, 385/62, 385/66, 385/81, 385/71
• US Class Current: 385/90
• CPC Class Codes: G02B 6/32 having lens focusing means positioned between opposed fibre ends with lens being an integral part of the single fibre end G02B6/262
• CPC Class Codes: G02B 6/3644 the coupling means being through-holes or wall apertures
• CPC Class Codes: G02B 6/3656 the additional structures being micropositioning, with microactuating elements for fine adjustment, or restricting movement, into two dimensions, e.g. cantilevers, beams, tongues or bridges with associated MEMs
• CPC Class Codes: G02B 6/3843 with auxiliary facilities for movably aligning or adjusting the fibre within its ferrule, e.g. measuring position or eccentricity testing the alignment of axes, including eccentricity, G01B11/27

Abstract

Optical connectors adapted to join optical fibers to an optical component, each connector having an outer support to be fixedly secured to the component and provided with a housing receiving a movable element having a spherical-surface portion to which an optical fiber-holding body is connected. The spherical surface of the movable element is in contact with a mating surface of the outer support and permits pivoting or rotation of the movable element and the body housing the fiber about any axis passing through the center of the spherical surface itself. Tightening means for locking the movable element against the housing surface is provided, and such tightening means is adapted to prevent pivoting or rotation of the movable element itself by friction. The connector can be made entirely of dielectric materials.

Claims

1. A swivel connector for joining an optical fiber to an optical component having a body and for permitting orientation of the axis of the optical fiber, said connector comprising:

a movable element having an external surface at least part of which is defined by a sphere, said element having an opening with an axis co-incident with the center of said sphere;

a tubular element having a bore for receiving an optical fiber, said tubular element being connected to said movable element for movement with said movable element and with the axis of said bore passing through said center of said sphere;

a tubular housing receiving said movable element and adapted to be secured to the body of the optical component, said housing having an interior surface which engages said external surface of said movable element at least along a line peripherally of said axis of said opening in said movable element;

releasable tightening means acting between said tubular housing and said movable element for pressing said external surface of said movable element against said interior surface of said housing and thereby frictionally preventing relative movement between said external surface and said interior surface; and

a lens mounted on said tubular element in alignment with said bore of said tubular element for receiving light from an optical fiber within said bore whereby said lens moves with said tubular element and movement of said movable element.

2. A swivel connector as set forth in claim 1 wherein said housing has screw threads thereon and said tightening means is a locking nut with screw threads engaging said screw threads on said housing and which is disposed on the side of said movable element opposite from said interior surface, said locking nut having an engaging surface at the portion thereof nearer said external surface which engages said external surface at least along a line peripherally of said axis of said opening in said movable element.

3. A swivel connector as set forth in claim 2 wherein said engaging surface is conical.

4. A swivel connector as set forth in claim 2 wherein said engaging surface is in the shape of a portion of a sphere.

5. A swivel connector as set forth in claim 1 wherein said interior surface is defined by a cone having an axis which passes through said center of said sphere.

6. A swivel connector as set forth in claim 1 wherein said interior surface is defined by a sphere and the axis of said interior surface passes through said center of the first-mentioned said sphere.

7. A swivel connector as set forth in claim 1 wherein said tubular element is integral with said movable element.

8. A swivel connector as set forth in claim 1 wherein the end of said tubular element lies in a plane passing through said enter of said sphere.

9. A swivel connector as set forth in claim 1 wherein an end portion of said tubular element nearer said center of said sphere is spaced from said center of said sphere and wherein said lens is mounted on said end portion of said tubular element and disposed in said opening in said movable element with its focus axis coincident with said axis of said bore.

10. A swivel connector as set forth in claim 9 wherein said lens is spaced from said center of said sphere.

11. A swivel connector as set forth in claim 1 wherein said connector comprises only dielectric materials.

12. A swivel connector as set forth in claim 1 wherein at least said movable element, said tubular housing and said releasable tightening means are made of polymeric materials.

13. A swivel connector as set forth in claim 12 wherein said polymeric materials are selected from the group consisting of acetal resins and epoxy resins optionally containing mineral fillers.

14. A swivel connector as set forth in claim 1 further comprising an adhesive between at least one of said tubular housing and said movable element, on the one hand, and said tubular element and said movable element, on the other hand, for maintaining said movable element in a fixed position after adjustment thereof.

15. An optical sensor comprising walls defining a passageway for the passage of light, said sensor having a light input opening and a light output opening, and connectors, one for each opening, at each opening and secured to said walls, each said connector comprising:

a movable element having an external surface at least part of which is defined by a sphere, said element having an opening with an axis co-incident with the center of said sphere;

a tubular element having a bore for receiving an optical fiber, said tubular element being connected to said movable element for movement with said movable element and with the axis of said bore passing through said center of said sphere;

a tubular housing receiving said movable element and adapted to be secured to the body of the optical component, said housing having an interior surface which engages said external surface of said movable element at least along a line peripherally of said axis of said opening in said movable element;

releasable tightening means acting between said tubular housing and said movable element for pressing said external surface of said movable element against said interior surface of said housing and thereby frictionally preventing relative movement between said external surface and said interior surface; and

a lens mounted on said tubular element in alignment with said bore of said tubular element for receiving light from an optical fiber within said bore whereby said lens moves with said tubular element and movement of said movable element.

16. An optical sensor as set forth in claim 15 wherein each said connector has an optical fiber in said bore of said tubular element and engaged by the wall of said bore.

17. An optical sensor as set forth in claim 15 wherein said sensor including said connectors comprises only dielectric materials.

18. A swivel connector for joining an optical fiber to an optical component having a body and for permitting orientation of the axis of the optical fiber, said connector comprising:

a movable element having an external surface at least part of which is defined by a sphere, said element having an opening with an axis co-incident with the center of said sphere;

a tubular element having a bore for receiving an optical fiber, said tubular element being connected to said movable element for movement with said movable element and with the axis of said bore passing through said center of said sphere, an end portion of said tubular element nearer said center of said sphere being spaced from said center of said sphere;

a tubular housing receiving said movable element and adapted to be secured to the body of the optical component, said housing having an interior surface which engages said external surface of said movable element at least along a line peripherally of said axis of said opening in said movable element;

releasable tightening means acting between said tubular housing and said movable element for pressing said external surface of said movable element against said interior surface of said housing and thereby frictionally preventing relative movement between said external surface and said interior surface; and

a lens disposed in said opening of said movable element at said center of said sphere and at said end portion of said tubular element with its focus axis co-incident with said axis of said bore.

19. A swivel connector for joining an optical fiber to an optical component having a body and for permitting orientation of the axis of the optical fiber, said connector comprising:

a movable element having an external surface at least part of which is defined by a sphere, said element having an opening with an axis co-incident with the center of said sphere;

a tubular element having a bore for receiving an optical fiber, said tubular element being connected to said movable element for movement with said movement element and with the axis of said bore passing through said center of said sphere, an end portion of said tubular element nearer said center of said sphere being spaced from said center of said sphere;

a tubular housing receiving said movable element and adapted to be secured to the body of the optical component, said housing having an interior surface which engages said external surface of said movable element at least along a line peripherally of said axis of said opening in said movable element;

releasable tightening means acting between said tubular housing and said movable element for pressing said external surface of said movable element against said interior surface of said housing and thereby frictionally preventing relative movement between said external surface of said interior surface;

a lens disposed in said opening between said movable element and said center of said sphere and said end portion of said tubular element with its focus axis co-incident with said axis of said bore; and

said tubular element being slidably connected to said movable element for slidable movement in the direction axially of said bore for permitting adjustment of the position of the end of a fiber in said bore with respect to said lens and further comprising locking means for locking said tubular element in a desired axial position.

20. A swivel connector for joining an optical fiber to an optical component having a body and for permitting orientation of the axis of the optical fiber, said connector comprising:

a movable element having an external surface at least part of which is defined by a sphere, said element having an opening with an axis co-incident with the center of said sphere;

a tubular element having a bore for receiving an optical fiber, said tubular element being connected to said movable element for movement with said movable element and with the axis of said bore passing through said center of said sphere;

a tubular housing receiving said movable element and adapted to be secured to the body of the optical component, said housing having an interior surface which engages said external surface of said movable element at least along a line peripherally of said axis of said opening in said movable element;

releasable tightening means acting between said tubular housing and said movable element for pressing said external surface of said movable element against said interior surface of said housing and thereby frictionally preventing relative movement between said external surface and said interior surface; and

an anisotropic element in said opening in said movable member.

21. A swivel connector for joining an optical fiber to an optical component having a body and for permitting orientation of the axis of the optical fiber, said connector comprising:

a movable element having an external surface at least part of which is defined by a sphere, said element having an opening with an axis co-incident with the center of said sphere;

a tubular element having a bore for receiving an optical fiber, said tubular element being connected to said movable element for movement with said movable element and with the axis of said bore passing through said center of said sphere;

a tubular housing receiving said movable element and adapted to be secured to the body of the optical component, said housing having an interior surface which engages said external surface of said movable element at least along a line peripherally of said axis of said opening in said movable element;

releasable tightening means acting between said tubular housing and said movable element for pressing said external surface of said movable element against said interior surface of said housing and thereby frictionally preventing relative movement between said external surface and said interior surface; and

said interior surface being between said external surface and said releasable tightening means, said tubular housing having an exterior surface at least part of which is defined by a further sphere having a diameter greater than the diameter of the first-mentioned said sphere, said further sphere being concentric with the first-mentioned said sphere, said tubular element has screw threads thereon and said releasable tightening means comprises a locking nut with screw threads engaging said screw threads on said tubular element and having a locking surface engageable with said exterior surface of said tubular housing.

22. An optical sensor comprising walls defining a passageway for the passage of light, said sensor having a light input opening and a light output opening, and connectors, one for each opening, at each opening and secured to said walls, each said connector comprising:

a movement element having an external surface at least part of which is defined by a sphere, said element having an opening with an axis co-incident with the center of said sphere;

a tubular element having a bore for receiving an optical fiber, said tubular element being connected to said movable element for movement with said movable element and with the axis of said bore passing through said center of said sphere, an end portion of said tubular element nearer said center of said sphere being spaced from said center of said sphere;

a tubular housing receiving said movable element and adapted to be secured to the body of the optical component, said housing having an interior surface which engages said external surface of said movable element at least along a line peripherally of said axis of said opening in said movable element;

releasable tightening means acting between said tubular housing and said movable element for pressing said external surface of said movable element against said interior surface of said housing and thereby frictionally preventing relative movement between said external surface and said interior surface; and

a lens disposed in said opening of said movable element at said center of said sphere and at said end portion of said tubular element with its focus axis co-incident with said axis of said bore.

23. An optical sensor comprising walls defining a passageway for the passage of light, said sensor having a light input opening and a light output opening, and connectors, one for each opening, at each opening and secured to said walls, each said connector comprising:

a movable element having an external surface at least part of which is defined by a sphere, said element having an opening with an axis co-incident with the center of said sphere;

a tubular element having a bore for receiving an optical fiber, said tubular element being connected to said movable element for movement with said movable element and with the axis of said bore passing through said center of said sphere, an end portion of said tubular element nearer said center of said sphere being spaced from said center of said sphere;

a tubular housing receiving said movable element and adapted to be secured to the body of the optical component, said housing having an interior surface which engages said external surface of said movable element at least along a line peripherally of said axis of said opening in said movable element;

releasable tightening means acting between said tubular housing and said movable element for pressing said external surface of said movable element against said interior surface of said housing and thereby frictionally preventing relative movement between said external surface and said interior surface;

a lens disposed in said opening between said movable element and said center of said sphere and said end portion of said tubular element with its focus axis co-incident with said axis of said bore; and

said tubular element being slidably connected to said movable element for slidable movement in the direction axially of said bore for permitting adjustment of the position of the end of a fiber in said bore with respect to said lens and further comprising locking means for locking said tubular element in a desired axial position.

24. An optical sensor comprising walls defining a passageway for the passage of light, said sensor having a light input opening and a light output opening, and connectors, one for each opening, at each opening and secured to said walls, each said connector comprising:

a movable element having an external surface at least part of which is defined by a sphere, said element having an opening with an axis co-incident with the center of said sphere;

a tubular element having a bore for receiving an optical fiber, said tubular element being connected to said movable element for movement with said movable element and with the axis of said bore passing through said center of said sphere;

a tubular housing receiving said movable element and adapted to be secured to the body of the optical component, said housing having an interior surface which engages said external surface of said movable element at least along a line peripherally of said axis of said opening in said movable element;

releasable tightening mean acting between said tubular housing and said movable element for pressing said external surface of said movable element against said interior surface of said housing and thereby frictionally preventing relative movement between said external surface and said interior surface; and

an anisotropic element in said opening in said movable member.

25. An optical sensor comprising walls defining a passageway for the passage of light, said sensor having a light input opening and a light output opening, and connectors, one for each opening, at each opening and secured to said walls, each said connector comprising:

a movable element having an external surface at least part of which is defined by a sphere, said element having an opening with an axis co-incident with the center of said sphere;

a tubular element having a bore for receiving an optical fiber, said tubular element being connected to said movable element for movement with said movable element and with the axis of said bore passing through said center of said sphere;

a tubular housing receiving said movable element and adapted to be secured to the body of the optical component, said housing having an interior surface which engages said external surface of said movable element at least along a line peripherally of said axis of said opening in said movable element;

releasable tightening means acting between said tubular housing and said movable element for pressing said external surface of said movable element against said interior surface of said housing and thereby frictionally preventing relative movement between said external surface and said interior surface; and

said interior surface being between said external surface and said releasable tightening means, said tubular housing having an exterior surface at least part of which is defined by a further sphere having a diameter greater than the diameter of the first-mentioned said sphere, said further sphere being concentric with the first-mentioned said sphere, said tubular element has screw threads thereon and said releasable tightening means comprises a locking nut with screw threads engaging said screw threads on said tubular element and having a locking surface engageable with said exterior surface of said tubular housing.