Endoscope having disposable illumination and camera module

• US 8,928,746 B1
• Filed: 10/18/2013
• Issued: 01/06/2015
• Est. Priority Date: 10/18/2013
• Status: Expired due to Fees

• Current Assignee: Stevrin & Partners
• Original Assignee: Stevrin & Partners
• Inventors: Stevrin, Peter Magnus, Khatabi, Siamak
• Primary Examiner(s): BAILEY, FREDERICK D
• Application Number:
  US14/058,036
• Time in Patent Office: 445 Days
• Field of Search: None
• US Class Current: 348/68
• CPC Class Codes: A61B 1/00096 Optical elements
• CPC Class Codes: A61B 1/00101 the distal tip features being detachable
• CPC Class Codes: A61B 1/00103 designed for single use
• CPC Class Codes: A61B 1/00194 adapted for three-dimensional imaging
• CPC Class Codes: A61B 1/053 being detachable
• CPC Class Codes: A61B 1/0607 for annular illumination
• CPC Class Codes: A61B 1/0684 using light emitting diodes [LED]
• CPC Class Codes: G02B 23/2461 Illumination
• CPC Class Codes: G02B 23/2476 Non-optical details, e.g. housings, mountings, supports
• CPC Class Codes: G02B 23/2484 Arrangements in relation to a camera or imaging device processing or control of video signals generated by an endoscope H04N23/60, H04N23/70
• CPC Class Codes: H04N 23/555 for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes
• CPC Class Codes: H04N 23/56 provided with illuminating means
• CPC Class Codes: H04N 23/57 Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices

Abstract

An endoscope having a single-use disposable illumination and camera module is provided in which an imaging element is disposed within an annular tube of optically transparent material having proximal and distal ends, wherein the proximal end is configured to engage a plurality of LEDS and the distal end has a cross-section in the form of an arc of a circle or ellipse, so that the annular tube serves as a light mixer and diffuser, providing uniform illumination within the field of view of the imaging element. Methods of analyzing and displaying the output of the endoscope also are provided.

Claims

1. A single-use, disposable illumination and camera module for an endoscope comprising:

a cable configured for insertion in a lumen of a body, the cable having a proximal end configured to be removably connected to endoscope circuitry and a distal region;

an annular light diffuser disposed on the distal region of the cable, the annular light diffuser having a proximal end, a distal end, a length of 6.0 mm or less, and a diameter of 5.0 mm or less, the distal end having a curved cross-section, the annular light diffuser comprising an optically transparent material;

a camera having an image sensor and a lens having a field of view, the image sensor disposed concentrically within the annular light diffuser; and

at least one light emitting diode optically coupled to the proximal end of the annular light diffuser,

wherein light emitted by the light emitting diode is projected through the curved-cross section of the distal end of the annular light diffuser to provide substantially uniform illumination within the field of view of the lens when disposed and activated within the lumen of the body.

2. The single-use, disposable illumination and camera module of claim 1, wherein the curved cross-section comprises an arc of a circle or an ellipse.

3. The single-use, disposable illumination and camera module of claim 1, further comprising a reflective coating disposed on one of an interior surface of the annular light diffuser or an exterior surface of the light diffuser.

4. The single-use, disposable illumination and camera module of claim 1, wherein the camera comprises a CMOS camera.

5. The single-use, disposable illumination and camera module of claim 1, wherein the image sensor and lens are disposed within a light shield.

6. The single-use, disposable illumination and camera module of claim 1, wherein the camera comprises an array of at least 400×

400 pixels.

7. The single-use, disposable illumination and camera module of claim 1, wherein the annular light diffuser comprises polycarbonate.

8. The single-use, disposable illumination and camera module of claim 1, wherein the field of view of the lens comprises at least 45 degrees.

9. The single-use, disposable illumination and camera module of claim 1, wherein the lens comprises a chromatically correcting coating.

10. The single-use, disposable illumination and camera module of claim 1, wherein the light emitting diode is coupled to the proximal end of the annular light diffuser with a glue having a desired transmissivity for a predetermined range of wavelengths.

11. An apparatus for imaging an inner surface of a lumen in a body, comprising:

a single-use, disposable capsule housing that is sized to readily pass through the lumen, the single-use, disposable capsule housing having a camera having an image detector and a lens, an optically transparent annular light diffuser having a proximal end, a distal end, a length of 6.0 mm or less, and a diameter of 5.0 mm or less, and a light source coupled to the proximal end of the annular light diffuser, wherein light emitted by the light source is projected through the distal end of the annular light diffuser having a curvature to provide substantially uniform illumination within a field of view of the lens when disposed within and activated in the lumen of the body, and wherein the image detector is disposed concentrically within the annular light diffuser; and

a flexible tether detachably connected to the single-use, disposable capsule housing, the flexible tether configured to extend proximally through a lumen to enable a force to be applied to the single-use, disposable capsule housing to control a movement of the single-use, disposable capsule housing within the lumen, and to permit retraction of the single-use, disposable capsule housing from the lumen.

12. The apparatus of claim 11, wherein the curvature comprises an arc of a circle or an ellipse.

13. The apparatus of claim 11, wherein the single-use, disposable capsule housing further comprises a reflective coating disposed on an interior surface of the annular light diffuser.

14. The apparatus of claim 11, wherein the image sensor comprises a CMOS image sensor.

15. The apparatus of claim 11, wherein the image sensor and lens are disposed within a light shield.

16. The apparatus of claim 11, wherein the tether includes at least one electrical lead that is coupled to the camera and conveys an electrical signal from the camera to a location that is outside of a lumen in a body.

17. The apparatus of claim 11, wherein the single-use, disposable capsule housing is sized and configured to be swallowed by a patient with the tether connected thereto and the tether includes a plurality of scale markings that serve to enable a user to measure a distance traveled by the single-use, disposable capsule housing into a lumen of a body.

18. The apparatus of claim 11, wherein the light source comprises at least one light emitting diode.

19. The apparatus of claim 11, further comprising a wireless chipset configured to wirelessly transmit video images output by the camera to a display.

20. The apparatus of claim 11, further comprising a processor programmed with software that accepts as input a plurality of still images generated by the camera and outputs for display a three-dimensional rendering of a body feature based on the plurality of still images.