Multi-camera endoscope

1. A multi-camera endoscope comprising:

an elongated shaft terminating with a tip section turnable by way of a bending section, wherein said tip section has an end surface and a side surface extending along its length and comprises:

a front-pointing camera and at least two discrete front illuminators associated therewith, wherein said front-pointing camera and the at least two discrete front illuminators are outwardly positioned to receive and emit light, respectively, through said end surface and wherein said front-pointing camera comprises a lens assembly providing a field of view of at least 120 degrees and a length over which an object remains in focus of approximately 3-100 millimeters;

a front fluid injector configured for cleaning at least one of said front-pointing camera and said at least two discrete front illuminators;

a first side-pointing camera and a discrete side illuminator associated therewith, wherein the first side-pointing camera and discrete side illuminator are outwardly positioned to receive and emit light, respectively, through the side surface wherein said first side-pointing camera comprises a lens assembly providing a field of view of at least 120 degrees and a length over which an object remains in focus of approximately 2-33 millimeters and wherein a center of said first side-pointing camera is positioned approximately 7 to 11 millimeters from the end surface;

a side fluid injector configured for cleaning at least one of said first side-pointing camera and said associated discrete side illuminator;

a second side-pointing camera opposing said first side-pointing camera, wherein said second side-pointing camera comprises a lens assembly providing a field of view of at least 120 degrees and a length over which an object remains in focus of approximately 2-33 millimeters and wherein a center of said second side-pointing camera is positioned approximately 7 to 11 millimeters from the end surface;

a working channel configured for insertion of a surgical tool;

an integrated circuit board adapted to supply the front-pointing camera, first side-pointing camera, and second side-pointing camera with electrical power and derive images from each of the front-pointing, first side-pointing camera, and second side-pointing camera, and

a pathway fluid injector for inflating and/or cleaning a body cavity into which the endoscope is inserted, wherein fields of view of said front-pointing camera and first side-pointing camera and fields of views of said front-pointing camera and second side-pointing camera are at least partially overlapping, such that an object of interest viewed via said first side-pointing camera remains in the field of view of said first side-pointing camera while said tip section is being turned towards the object, and at least until the object becomes visible through said front-pointing camera and such that an object of interest viewed via said second side-pointing camera remains in the field of view of said second side-pointing camera while said tip section is being turned towards the object, and at least until the object becomes visible through said front-pointing camera.

2. The multi-camera endoscope according to claim 1 , wherein said front-pointing camera and said first side-pointing camera are pointing at directions essentially perpendicular to one another.

3. The multi-camera endoscope according to claim 1 , wherein said front-pointing camera and said first side-pointing camera are pointing approximately 100 to 145 degrees relative to one another.

4. The multi-camera endoscope according to claim 1 , wherein each of said discrete front and side illuminators comprises a light-emitting diode (LED).

5. The multi-camera endoscope according to claim 4 , wherein at least one of said discrete front and side illuminators is configured to emit white light, ultraviolet light, infrared light, near-infrared light or any combination thereof.

6. The multi-camera endoscope according to claim 1 , wherein said discrete front and side illuminators are configured to emit light in different wavelengths.

7. The multi-camera endoscope according to claim 1 , wherein one of said at least two discrete front illuminators is configured to emit light having a different wavelength than the other of said at least two discrete front illuminators.

8. The multi-camera endoscope according to claim 7 , wherein said at least two discrete front illuminators are configured to simultaneously emit light, each at a different wavelength.

9. The multi-camera endoscope according to claim 1 , wherein the at least two discrete front illuminators share a common protective window.

10. The multi-camera endoscope according to claim 1 , wherein each of said front-pointing camera and said first side-pointing camera comprises a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor.

11. The multi-camera endoscope according to claim 1 , wherein said front and side fluid injectors are connected to a same fluid supply channel.

12. The multi-camera endoscope according to claim 11 , wherein said pathway fluid injector is connected to said fluid supply channel, together with said front and side fluid injectors.

13. The multi-camera endoscope according to claim 1 , wherein at least one of said front-pointing, first side-pointing and second side-pointing cameras comprises a lens assembly providing a field of view of 150 degrees or more.

14. The multi-camera endoscope according to claim 1 , wherein said endoscope is a colonoscope.

15. A multi-camera endoscopy system comprising:

an endoscope comprising a handle and an elongated shaft terminating with a tip section turnable by way of a bending section, wherein said tip section comprises:

a front-pointing camera and a discrete front illuminator associated therewith, wherein said front-pointing camera comprises a lens assembly providing a field of view of at least 120 degrees and having a length over which an object remains in focus of approximately 3-100 millimeters;

a front fluid injector configured for cleaning at least one of said front-pointing camera and said discrete front illuminator;

a first side-pointing camera and a discrete side illuminator associated therewith, wherein said first side-pointing camera comprises a lens assembly providing a field of view of at least 120 degrees and a length over which an object remains in focus of approximately 2-33 millimeters and wherein a center of said first side-pointing camera is positioned approximately 7 to 11 millimeters from a distal end of the tip section;

a side fluid injector configured for cleaning at least one of said first side-pointing camera and said discrete side illuminator;

a second side-pointing camera pointed in a direction opposite said first side-pointing camera, wherein said second side-pointing camera comprises a lens assembly providing a field of view of at least 120 degrees and a length over which an object remains in focus of approximately 2-33 millimeters and wherein a center of said second side-pointing camera is positioned approximately 7 to 11 millimeters from the distal end of the tip section;

a working channel configured for insertion of a surgical tool;

an integrated circuit board adapted to supply the front-pointing camera, first side-pointing camera, and second side-pointing camera with electrical power and derive images from each of the front-pointing, first side-pointing camera, and second side-pointing camera; and

a pathway fluid injector for inflating and/or cleaning a body cavity into which the endoscope is inserted;

a controller connected to said handle of said endoscope by way of a utility cable; and

a display connected to said controller and configured to display video streams received from said front and side-pointing cameras wherein fields of view of said front-pointing camera and first side-pointing camera and fields of views of said front-pointing camera and second side-pointing camera are at least partially overlapping, such that an object of interest viewed via said first side-pointing camera remains in the field of view of said first side-pointing camera while said tip section is being turned towards the object, and at least until the object becomes visible through said front-pointing camera and such that an object of interest viewed via said second side-pointing camera remains in the field of view of said second side-pointing camera while said tip section is being turned towards the object, and at least until the object becomes visible through said front-pointing camera.