Endoscope coupler device

• US 4,844,071 A
• Filed: 03/31/1988
• Issued: 07/04/1989
• Est. Priority Date: 03/31/1988
• Status: Expired due to Term

• Current Assignee: Edwards Lifesciences Corporation
• Original Assignee: Baxter Travenol Laboratories Incorporated (Baxter International Inc.)
• Inventors: Chen, Chingfa, Pastrick, Danny L.
• Primary Examiner(s): Grieb, William H.
• Application Number:
  US07/175,937
• Time in Patent Office: 460 Days
• Field of Search: 128/3, 128/4, 128/5, 128/6, 128/7, 128/8, 604/905
• US Class Current: 600/112
• CPC Class Codes: A61B 1/00126 optical, e.g. for light supply cables
• CPC Class Codes: A61B 1/00128 mechanical, e.g. for tubes or pipes
• CPC Class Codes: A61B 1/042 characterised by a proximal camera, e.g. a CCD camera

Abstract

A coupler device for coupling an endoscope to a camera head includes a housing that defines an enclosed light path extending along an optical axis between first and second end portions of the housing together with mounting components for attaching the first end portion of the housing to an endoscope and the second end portion of the housing to a camera head so that the light path extends toward the camera head. A single lens mounted within the housing intermediate the first and second end portions magnifies an image from the endoscope in order to provide a magnified image to the camera head, the lens being a single refracting optical element for magnifying the image from the endoscope that is the sole refracting optical element for magnifying the image. A quick-release arrangement in one embodiment enables attachment of the endoscope by advancing the endoscope axially without a having to rotate it while a focusing ring enables fine focusing adjustments. An imaging system includes an imaging endoscope with a quick-release connector hub, a coupler device for attachment between the connector hub and a camera head, and an interchangeable eyepiece for interfacing the endoscope to a human eye.

Claims

1. A coupler device for coupling an endoscope to a camera head, comprising:

a housing defining a light path that extends along an optical axis between first and second end portions of the housing;

first mounting means for attaching the first end portion of the housing to an endoscope and for enabling a user to attach the endoscope to the housing by advancing a proximal end of the endoscope axially relative to the first end portion of the housing without having to rotate the endoscope;

second mounting means for attaching the second end portion of the housing to a camera head so that the light path extends toward the camera head; and

lens means mounted within the housing intermediate the first and second end portions for magnifying an image from the endoscope in order to provide a magnified image to the camera head;

the first mounting means including means for maintaining concentricity between a connector hub on the proximal end of the endoscope and the coupler device;

the means for maintaining concentricity including the first end portion of the housing being dimensioned and arranged to receive a tip portion of the connector hub and at least one radially extending member mounted on the first end portion that is arranged to extend radially inwardly to engage a circumferentially extending groove in the tip portion of the connector hub when the tip portion is inserted into the first end portion of the coupler device.

2. A device as recited in claim 1, wherein:

the first mounting means is configured to retain the first end portion of the housing adjacent the proximal end of an endoscope imaging fiber so that the proximal end of the endoscope imaging fiber faces into the housing along the light path.

3. A device as recited in claim 1, wherein the second mounting means includes:

a connector hub attached to the endoscope; and

quick-release means for enabling a user to attach the connector hub to and detach the connector hub from the first end portion of the housing by advancing the connector hub axially relative to the first end portion of the housing without having to rotate the connector hub.

4. A device as recited in claim 1, further comprising:

antirotation means for preventing rotation of the first end portion relative to the connector hub.

5. A device as recited in claim 1, wherein the second mounting means includes:

the second end portion of the housing having a threaded portion dimensioned and arranged to be screwed onto the camera head, the second end portion being configured for attachment to a conventional C mount.

6. A device as recited in claim 1, wherein:

the lens means includes a single refracting optical element for magnifying the image from the endoscope that is the sole refracting optical element for magnifying the image.

7. A device as recited in claim 6, further comprising:

focusing means for enabling a user to adjust the distance of the lens from the endoscope for focussing purposes.

8. A coupler device for coupling an endoscope to a camera head, comprising:

a housing defining a light path that extends generally along an optical axis between first and second end portions of the housing;

first mounting means for receiving a connector hub on a proximal end of an endoscope so that the first end portion of the housing is retained adjacent a proximal end of an endoscope imaging fiber in a position such that the proximal end of the endoscope imaging fiber faces into the housing along the light path and for enabling a user to attach the endoscope to the coupler device by advancing a proximal end of the endoscope axially relative to the first end portion of the coupler device without having to rotate the endoscope;

second mounting means for mounting the second end portion of the housing on a camera head so that the light path extends toward the camera head; and

lens means mounted within the housing intermediate the first and second end portions for magnifying an image from the endoscope in order to provide a magnified image to the camera head;

the first mounting means including means for maintaining concentricity between a connector hub on the proximal end of the endoscope and the coupler device;

the means for maintaining concentricity including the coupler device having a first end portion dimenisioned and arranged to receive a tip portion of the connector hub and a plurality of radially extending members arranged to extend inwardly to engage a circumferentially extending groove in the tip portion of the connector hub when the tip portion is inserted into the first end portion of the coupler device.

9. An imaging system, comprising:

an imaging endoscope;

camera coupler means for coupling the endoscope directly to a camera head, the coupler means including a housing and the housing defining a light path that extends along an optical axis between first and second end portions of the housing;

first mounting means for attaching the first end portion of the housing to the endoscope and for enabling a user to attach the endoscope to and detach the endoscope from the first end portion of the housing by advancing a proximal end of the endoscope axially relative to the first end portion of the housing without having to rotate the endoscope; and

second mounting means for attaching the second end portion of the housing to a camera head so that the light path extends toward the camera head;

the second mounting means including the second end portion of the housing having a threaded portion dimensioned and arranged to be screwed onto the camera head, which second end portion is configured for attachment to a conventional C mount.

10. An imaging system as recited in claim 9, further comprising:

eyepiece means for interfacing the endoscope to a human eye, which eyepiece means is compatible with the quick-release means to enable interchangeable mounting on the endoscope of a selected one of the camera coupler means and the eyepiece means.

11. An imaging system as recited in claim 9, wherein the imaging endoscope includes:

a connector hub attached to the proximal end portion of the endoscope; and

a tip portion of the connector hub that is dimensioned and arranged to fit into the first end portion of the coupler device;

the tip portion defining a recess that is dimensioned and arranged to receive radially extending members attached to the first end portion for purposes of providing a quick-release attachment to the coupler device.

12. An imaging system as recited in claim 11, wherein:

the recess is in the form of a circumferentially extending groove in the tip portion.

13. An imaging system as recited in claim 11, wherein the connector hub includes:

antirotation means for preventing rotation of the connector hub relative to the coupler device.

14. An imaging system as recited in claim 13, wherein the antirotation means includes:

a circularly shaped flange portion of the connector hub that defines a plurality of spaced apart notches.

15. An imaging system, comprising:

an imaging endoscope having a proximal end portion and a connector hub attached to the proximal end portion;

a coupler device for coupling the endoscope to a camera head and an eyepiece device for interfacing the endoscope to an eye; and

quick-release means for enabling a user to attach the endoscope to a selected one of the coupler device and the eyepiece device by advancing a proximal end of the endoscope axially relative to a first end portion of the selected one without having to rotate the endoscope;

the quick-release means including means for maintaining concentricity between the connector hub and the selected one of the coupler device and the eyepiece device;

the means for maintaining concentricity including the coupler device having a first end portion, the eyepiece device having a first end portion, and the connector hub having a tip portion that is dimensioned and arranged to fit without the first end portion of the coupler device and the first end portion of the eyepiece device, a circumferentially extending groove in the tip portion, at least one radially extending member attached to the first end portion of the coupler device, and at least one radially extending member attached to the first end portion of the eyepiece device, which radially extending members are arranged to extend inwardly to engage the groove when the tip portion is inserted into the first end portion.

16. An imaging system as recited in claim 15, wherein each one of the radially extending members includes:

a screw extending through the first end portion of a respective one of the coupler device and the eyepiece device to a tip of the screw; and

a spring loaded ball arrangement attached to the tip of the screw.

17. An imaging system as recited in claim 15, wherein the coupler device includes:

a housing defining a light path that extends along an optical axis between first and second end portions of the housing;

first mounting means for attaching the first end portion of the housing to an endoscope;

second mounting means for attaching the second end portion of the housing to a camera head so that the light path extends toward the camera head; and

lens means mounted within the housing intermediate the first and second end portions for magnifying an image from the endoscope in order to provide a magnified image to the camera head.

18. An imaging system as recited in claim 17, wherein the first mounting means includes:

means for retaining the first end portion of the housing adjacent the proximal end of an endoscope imaging fiber so that the proximal end of the endoscope imaging fiber faces into the housing along the light path.

19. An imaging system as recited in claim 18, further comprising:

antirotation means for preventing rotation of the first end portion relative to the connector hub.

20. An imaging system as recited in claim 17, wherein the second mounting means includes:

the second end portion of the housing having a threaded portion dimensioned and arranged to be screwed onto the camera head, which second end portion is configured for attachment to a conventional C mount.

21. An imaging system as recited in claim 17, further comprising:

focusing means for enabling a user to adjust the distance of the lens from the endoscope for focusing purposes.

22. An imaging system as recited in claim 21, wherein the focusing means includes:

a ring circumscribing the housing, which ring is mounted on the housing to enable a user to rotate the ring about the optical axis; and

means for causing the lens to move axially as the ring is rotated.

23. An imaging system as recited in claim 15, wherein the coupler device includes:

a housing for unitary construction defining a light path that extends generally along an optical axis between first and second end portions of the housing;

first mounting means for receiving the connector hub so that the first end portion of the housing is retained adjacent the proximal end of an imaging fiber of the imaging endoscope in a position such that the proximal end of the imaging fiber faces into the housing along the light path;

second mounting means for mounting the second end portion of the housing on a camera head so that the light path extends toward the camera head; and

lens means mounted within the housing intermediate the first and second end portions for magnifying an image from the endoscope in order to provide a magnified image to the camera head.

24. An optical interfacing device for use with an endoscope of the type which has a proximal end, a connector hub connected to the endoscope adjacent the proximal end, a circumferentially extending groove in the connector hub, and means for transmitting an image proximally, said optical interfacing device comprising:

a housing having first and second end portions and a passage extending between the first and second end portions, said housing defining a light path that extends along an optical axis through the passage;

said passage opening at said first end portion to receive the connector hub;

a radially movable element biased radially inwardly into said passage adjacent said first end portion and being receivable in the groove of the connector hub to releasably attach the endoscope to the housing; and

a lens mounted on said housing within said passage and along the optical axis.

25. An optical interfacing device as defined in claim 24 including means on the housing for interfacing the housing to an eye of a user when the eye of the user is placed closely proximate the second end portion.

26. An optical interfacing device as defined in claim 25 including mounting means for attaching the second end portion of the housing to a camera head so that the light path extends toward the camera head.

27. An imaging system, comprising:

an endoscope having a proximal end portion and a connector hub attached to the proximal end portion;

an eyepiece device for interfacing the endoscope to an eye; and

quick-release means for enablig a user to attach the endoscope to the eyepiece device by advancing a proximal end of the endoscope axially relative to the eyepiece without having to rotate the endoscope;

the eyepiece device including a housing having first and second end portions and a passage extending between the first and second end portions, said housing defining a light path that extends along an optical axis through the passage;

said passage opening at said first end portion to receive the connector hub; and

the quick-release means including a radially movable element mounted on the housing that is biased radially inwardly into said passage adjacent said first end portion and being receivable in the groove of the connector hub to releasably attach the endoscope to the housing.

28. An imaging system as recited in claim 27, wherein the eyepiece device includes:

a lens mounted on said housing within said passage and along the optical axis.

29. An imaging system as recited in claim 27, further comprising:

a coupler device for coupling the endoscope to a camera head, which coupler device includes quick-release means for enabling a user to attach the endoscope to the coupler device by advancing the proximal end portion of the endoscope axially relative to the coupler device without having to rotate the endoscope.