Fiber-optic test probe and connector adapter for testing fiber-optic connector harnesses

• US 5,940,559 A
• Filed: 07/17/1996
• Issued: 08/17/1999
• Est. Priority Date: 07/17/1996
• Status: Expired due to Term

• Current Assignee: Glenair Incorporated
• Original Assignee: Glenair Incorporated
• Inventors: Noll, Gregory Bruce
• Primary Examiner(s): Ullah, Akm E.
• Application Number:
  US08/682,096
• Time in Patent Office: 1,126 Days
• Field of Search: 385/58, 385/59, 385/69, 385/88-92
• US Class Current: 385/53
• CPC Class Codes: G01M 11/33 with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
• CPC Class Codes: G02B 6/3807 Dismountable connectors, i.e. comprising plugs
• CPC Class Codes: G02B 6/3821 with axial spring biasing or loading means G02B6/3847 takes precedence
• CPC Class Codes: G02B 6/3825 with an intermediate part, e.g. adapter, receptacle, linking two plugs
• CPC Class Codes: G02B 6/3869 Mounting ferrules to connector body, i.e. plugs
• CPC Class Codes: G02B 6/3874 using tubes, sleeves to align ferrules
• CPC Class Codes: G02B 6/3877 Split sleeves
• CPC Class Codes: G02B 6/3878 comprising a plurality of ferrules, branching and break-out means
• CPC Class Codes: G02B 6/38875 Protection from bending or twisting
• CPC Class Codes: G02B 6/3894 Screw-lock type

Abstract

A fiber-optic test probe and connector adapter for testing fiber-optic terminations, for example, in fiber optic connector assemblies. A single andmulti-channel connector adapter is provided that is adapted to be attached to the fiber-optic connector to be tested. In one embodiment of the invention, the connector adapter includes an alignment sleeve that enables the terminus of the fiber-optic connector to be tested to be axially aligned with the terminus of the test probe. In order to eliminate air gaps between the respective termini, the fiber-optic test probe and connector adapter are configured to provide axial compression forces between the mating termini in a test position in order to eliminate air gaps therebetween and thus reduce transmission losses. The test probe may be provided with strain relief and anti-bending boot, which prevents radial forces from misaligning the termini. The test probe includes a release sleeve that allows the test probe to be quickly released from its locked position. In an alternate embodiment of the invention, the alignment sleeve may be formed as part of the test probe. A probe calibration adapter, or feed-through adapter, is also provided, which enables two test probes to be coupled together for purposes of calibration. The feed-through adapter is configured to provide precise alignment between the respective termini of the test probe termini, while providing axial compression forces therebetween, similar to the adapter to reduce transmission losses and thus improve performance while providing good repeatability of the test measurements.

Claims

1. A fiber optic test probe for testing termini in a fiber optic connector, the fiber optic test probe comprising:

a probe body for carrying a terminus;

a retention washer disposed on said terminus;

a first compression spring for biasing said retention washer relative to said probe body;

a removal sleeve mounted for axial movement for receiving said probe body, said removal sleeve adapted to move toward said retention washer in a release position and spaced away from said retention washer in a locked position; and

a second compression spring for biasing said removal sleeve away from said retention washer.

2. A fiber optic test probe as recited in claim 1, further including an alignment sleeve.

3. A feed through adapter for calibrating fiber optic test probes;

a generally cylindrical body;

a bore formed in said cylindrical body for receiving test probes at each end of said generally cylindrical body; and

a pair of probe retention clips with one or more resilient fingers, said spring retention clips disposed at each end of said bore to lock said test probes in place.

4. A feed through adapter as recited in claim 3, further excluding an alignment sleeve for aligning the respective termini of said test probes.

5. A fiber test probe for testing termini in a fiber optic connector, the fiber optic connector test probe comprising:

a terminus mounted for axial movement;

biasing means for biasing said test probe in an axial direction; and

means for carrying said terminus and said biasing means.

6. A fiber optic test probe for testing termini in a fiber optic connector, said fiber optic test probe adapted to be received in a connector adapter and coupled to said fiber optic connector to be tested, said connector adapter including one or more axial bores adapted to aligned with the fiber optic connector to be tested, said one or more axial bores including a probe retention clip for locking fiber optic test probe relative to said connector adapter when said fiber optic test probe is in a locked position and releasing said fiber optic test probe relative to said connector adapter when said fiber optic connector is in a release position, the fiber optic test probe comprising:

a terminus assembly;

a retention washer mounted on said terminus assembly;

a compression spring carried by said terminus assembly, axially retained by said terminus assembly and said retention washer;

a removal sleeve mounted for axial movement relative to said retention washer, said removal sleeve adapted to be spaced away from said retention washer in a locked position to enable said retention washer to be captured by said probe retention clip in said connector adapter, said compression being compressed in said locked position and providing axial forces on said terminus, said removal sleeve adapted to release said retention washer from said probe retention clip in a release position to enable said test probe to be withdrawn from said connector adapter; and

a first housing for housing said test probes.

7. The fiber optic test probe as recited in claim 6, further including a second housing for partially receiving said terminus assembly, sid second housing adapted to be received within said removal sleeve to enable axial movement of said removal sleeve relative to said second housing.

8. The fiber optic test probe as recited in claim 7, wherein said second housing is mounted as formed with an increased diameter portion which forms a spring retainer and said removal sleeve is formed with an annular shoulder, further including a second compression spring disposed between said annular shoulder and said increased diameter portion.

9. The fiber optic test probe as recited in claim 8, further including a strain relief boot coupled to said first housing for protecting said test probe from radial forces.

10. The fiber optic test probe as recited in claim 6, wherein said terminus assembly includes a ferrule and a terminus body.

11. The fiber optic test probe as recited in claim 10, wherein said terminus body is formed with a cup-like structure on one end for receiving said ferrule.

12. The fiber optic test probe as recited in claim 10, further including a coupling device for coupling said ferrule and said terminus body.

13. The fiber optic test probe as recited in claim 12, wherein said test probe includes an alignment sleeve.

14. The fiber optic test probe as recited in claim 12, wherein said alignment is received over said ferrule, said alignment sleeve adapted to be seated against said coupling device in an axial direction.

15. The fiber optic test probe as recited in claim 14, wherein further including a protective cover, for protecting said alignment sleeve during shipping.

16. The fiber optic test probe as recited in claim 15, wherein said coupling device is provided with a threaded portion and said protective cover is provided with a mating threaded portion to enable said protective cover to be secured to said coupling device.

17. A fiber optic test probe for testing termini in a fiber optic connector, said fiber optic test probe adapted to be received in a connector adapter and coupled to said fiber optic connector to be tested, said connector adapter including one or more axial bores adapted to aligned with in the fiber optic connector to be tested, said one or more axial bores including a probe retention clip for locking fiber optic test probe relative to said connector adapter when said fiber optic test probe is in a locked position and releasing said fiber optic test probe relative to said connector adapter when said fiber optic connector is in a release position, the fiber optic test probe comprising:

a terminus assembly; and

means for biasing said terminus assembly in an axial direction when said test probe is in a locked position and means for locking said connector adapter defining a locked position; and

means for releasing said test probe relative to said connector adapter.