Line fiberoptic light control module

• US 5,101,468 A
• Filed: 04/08/1991
• Issued: 03/31/1992
• Est. Priority Date: 04/08/1991
• Status: Expired due to Fees

• Current Assignee: David Chiu
• Original Assignee: David Chiu
• Inventors: Chiu, David
• Primary Examiner(s): Ullah, Akm E.
• Application Number:
  US07/681,724
• Time in Patent Office: 358 Days
• Field of Search: 350/96.24-96.27, 128/4-6
• US Class Current: 385/115
• CPC Class Codes: A61B 1/00117 Optical cables in or with an endoscope
• CPC Class Codes: A61B 1/0646 with illumination filters
• CPC Class Codes: A61B 1/07 using light-conductive means, e.g. optical fibres
• CPC Class Codes: G02B 6/264 with optical elements between opposed fibre ends which perform a function other than beam splitting having lens focusing means G02B6/32; utilising prism or grating G02B6/34

Abstract

A light intensity control device for an endoscope or similar instrument comprising a light source, a fiberoptic cable connected at one to the light source, and a non-electrical diaphragm assembly connected between the end face of the fiberoptic cable and the end face of the fiberoptic bundle within the endoscope. The diaphragm assembly comprises an adjustable opening for receiving light from the end face of the cable for the transmission of light therethrough. A solid member of transparent material between the adjustable opening and the end face of the fiberoptic bundle within the endoscope transmits the light from the cable to the endoscope.

Claims

1. A light intensity control device for delivering and adjusting the intensity of light to an instrument containing a fiberoptic bundle for receiving light comprising a light source, a fiberoptic cable connected at one end to said light source and terminating in an end face at the other end thereof, and a non-electrical diaphragm assembly connected between the end face of said fiberoptic cable and the end face of the fiberoptic bundle entering said instrument, said diaphragm assembly comprising a mechanical adjustable opening means for receiving light from the end face of said cable for the transmission of light therethrough and a solid member of transparent material between said mechanical adjustable opening means and the end face of the fiberoptic bundle entering said instrument for transmitting the light from said cable to said bundle.

2. A light intensity control device for an instrument containing a fiberoptic bundle for receiving light comprising a light source, a fiberoptic cable connected at one end to said light source and terminating in an end face at the other end thereof, and a non-electrical diaphragm assembly connected between the end face of said fiberoptic cable and the end face of the fiberoptic bundle entering said instrument, said diaphragm assembly comprising adjustable opening means formed by a mechanical diaphragm for receiving light from the end face of said cable for the transmission of light therethrough and a solid member of transparent material between said adjustable opening means and the end face of the fiberoptic bundle entering said instrument for transmitting the light from said cable to said bundle, said diaphragm assembly comprising a hollow stationary cam means connected to the end face of said cable to receive light from said cable for passage through said cam means, hollow rotatable diaphragm seat means for permitting light to pass therethrough, said adjustable mechanical diaphragm being mounted between and connected to both said cam means and said rotatable diaphragm seat means so that rotation of the latter will cause the opening through said diaphragm to change in accordance with the direction of said rotation.

3. The light intensity control device of claim 2 including stationary assembly body means for enclosing said cam means, said diaphragm seat means and said solid body of transparent material, and having means for being attached to the end face of the instrument fiberoptic bundle so that said solid body is in light communication with the end face of the instrument fiberoptic bundle.

4. The light intensity control device of claim 3 having means for effecting the rotation of said diaphragm seat means comprising an outer, rotatable cylinder for enclosing said assembly body, said cylinder including set screw means for engaging said diaphragm seat means for rotating the latter, said assembly body means having a slot in the outer cirumference thereof to accomodate said set screw means.

5. The light intensity control device of claim 4 including stationary housing means for enclosing said rotatable cylinder and including thumbscrew means penetrating said housing for engaging said rotatable cylinder so that rotation of said thumbscrew means will adjust the opening through said mechanical diaphragm.

6. The light intensity control device of claim 4 wherein said mechanical diaphragm comprises a pair of leaves whose separation is controlled by the rotation of said hollow rotatable diaphragm seat means.

7. A non-electrical light intensity control device for an instrument containing a fiberoptic bundle for receiving light comprising a light source, a fiberoptic cable connected at one end to said light source and terminating in an end face at the other end thereof, said fiberoptic bundle extending out of said instrument and terminating in an end face, and means for adjusting the axial distance between said end faces to affect the amount of light being transmitted from said light source to said instrument.

8. The light intensity control device of claim 7 wherein said adjusting means comprises a first member for containing the end face of said cable adjacent the end face of said cable, a second member to support the end face of said fiberoptic bundle, and a third member engaged with said first and second members to permit the space between said fiberoptic bundle end face and the opposite end of said solid member to be varied.

9. The method of controlling the intensity of light delivered to an instrument containing a bundle of optical fibers comprising the steps of connecting one end of a fiberoptic cable to a source of light having an end face at the other end thereof, connecting between the end face of said cable and the end face of said bundle of optical fibers in said instrument a diaphragm assembly comprising adjustable opening means for receiving light from the end face of said cable for the transmission of light therethrough and a solid member of transparent material between said adjustable opening means and the end face of the fiberoptic bundle within said instrument for transmitting the light from said cable to said instrument, and adjusting the size of opening through said diaphragm assembly to control the amount of light passing therethrough.

10. The method of claim 9 wherein said adjustable opening means comprises an adjustable mechanical diaphragm.

11. The method of claim 10 wherein said diaphragm assembly comprises a hollow stationary cam means connected to the end face of said cable to receive light from said cable for passage through said cam means, hollow rotatable diaphragm seat means for permitting light to pass therethrough, said adjustable mechanical diaphragm being mounted between and connected to both said cam means and said rotatable diaphragm seat means so that rotation of the latter will cause the opening through said diaphragm to change in accordance with the direction of said rotation, and rotating said diaphragm seat means to adjust said opening.

12. The method of claim 11 including stationary assembly body means for enclosing said diaphragm cam drive means, said diaphragm seat means and said solid body of transparent material, and having means for being attached to the end face of the instrument fiberoptic bundle so that said solid body is in light communication with the end face of the instrument fiberoptic bundle.

13. The method of claim 12 having means for effecting the rotation of said diaphragm seat means comprising an outer, rotatable cylinder for enclosing said assembly body, said cylinder including set screw means for engaging said diaphragm seat means for rotating the latter, said assembly body means having a slot in the outer cirumference thereof to accomodate said set screw means.

14. The method of controlling the intensity of light delivered to an instrument containing a bundle of optical fibers having an end face to receive light comprising the steps of connecting one end of a fiberoptic cable to a source of light having an end face at the other end thereof, and adjusting the axial distance between said end faces to affect the intensity of light delivered to said instrument.