Multi-camera endoscope

1. A tip section of a multi-camera endoscope, wherein said tip section is defined by a housing having a cylindrical wall and a distal face and wherein the distal face is perpendicular to the cylindrical wall, the tip section comprising:

a front-pointing camera positioned on said distal face, wherein the front-pointing camera has a field of view of at least 120 degrees, a front-pointing image sensor, and a front lens assembly, and a discrete front illuminator associated therewith;

a first side-pointing camera positioned on said cylindrical wall and within an aperture in the cylindrical wall, wherein said first side-pointing camera has a field of view of at least 120 degrees, a first side-pointing image sensor, and a first side lens assembly, pointing in a first side direction, and positioned in proximity to the distal face of said tip section, wherein the aperture is in a depression in the cylindrical wall;

a second side-pointing camera positioned on said cylindrical wall, wherein said second side-pointing camera has a field of view of at least 120 degrees, a second side-pointing image sensor, and a second side lens assembly, pointing in a direction essentially opposite to the first side direction and positioned in proximity to said distal face of said tip section,

a fluid injector positioned on said cylindrical wall and within the depression in the cylindrical wall;

wherein each of said side-pointing cameras has a discrete side illuminator associated therewith, wherein the fields of view of the front-pointing camera and first side-pointing camera are at least partially overlapping, such that an object of interest viewed via the first side-pointing camera remains in the field of view of the first side-pointing camera while the tip section is being turned towards the object, and at least until the object becomes visible through the front-pointing camera and wherein the fields of view of the front-pointing camera and second side-pointing camera are at least partially overlapping, such that an object of interest viewed via the second side-pointing camera remains in the field of view of the second side-pointing camera while the tip section is being turned towards the object, and at least until the object becomes visible through the front-pointing camera; and

a working channel configured for insertion of a surgical tool, wherein the working channel extends through the tip section and has an exit opening on said distal face.

2. The tip section according to claim 1 , wherein the fluid injector is a first fluid injector, and the tip section further comprises a second fluid injector for inflating and/or cleaning a body cavity into which the endoscope is inserted, wherein the second fluid injector has an exit opening on said distal face.

3. The tip section according to claim 1 , wherein the fluid injector is a first fluid injector, and the tip section further comprises a second fluid injector configured for cleaning at least one of said front-pointing camera and said discrete front illuminator, wherein the second fluid injector has an exit opening on said distal face.

4. The tip section according to claim 1 , further comprising one or more additional fluid injectors configured for cleaning the second side-pointing camera and said discrete side illuminators.

5. The tip section according to claim 1 , comprising three or more side-pointing cameras positioned essentially at equal distances from each other along the cylindrical wall of said tip section.

6. The tip section according to claim 1 , wherein said discrete front illuminator comprises a light-emitting diode (LED).

7. The tip section according to claim 1 , wherein each of said discrete side illuminators comprises a light-emitting diode (LED).

8. The tip section according to claim 1 , wherein each of said discrete front and side illuminators comprises a light-emitting diode (LED).

9. The tip section according to claim 1 , wherein said endoscope is a colonoscope.

10. A multi-camera endoscope comprising:

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

a housing having a cylindrical wall and a distal face, wherein the distal face is perpendicular to the cylindrical wall;

a front-pointing camera positioned on said distal face, wherein the front-pointing camera has a field of view of at least 120 degrees, a front-pointing image sensor, and a front lens assembly, and a discrete front illuminator associated therewith;

a first side-pointing camera positioned on said cylindrical wall and within an aperture in the cylindrical wall, wherein the first side-pointing camera has a field of view of at least 120 degrees, a first side-pointing image sensor, and a first side lens assembly, pointing in a first side direction, and positioned in proximity to the distal face of said tip section, wherein the aperture is in a depression in the cylindrical wall;

a second side-pointing camera positioned on said cylindrical wall, wherein the second side-pointing camera has a field of view of at least 120 degrees, a second side-pointing image sensor, and a second side lens assembly, pointing in a direction essentially opposite to the first side direction and positioned in proximity to the distal face of said tip section, wherein each of said side-pointing cameras has a discrete side illuminator associated therewith,

a fluid injector positioned on said cylindrical wall and within the depression in the cylindrical wall,

wherein the fields of view of the front-pointing camera and first side-pointing camera are at least partially overlapping, such that an object of interest viewed via the first side-pointing camera remains in the field of view of the first side-pointing camera while the tip section is being turned towards the object, and at least until the object becomes visible through the front-pointing camera and wherein the fields of view of the front-pointing camera and second side-pointing camera are at least partially overlapping, such that an object of interest viewed via the second side-pointing camera remains in the field of view of the second side-pointing camera while the tip section is being turned towards the object, and at least until the object becomes visible through the front-pointing camera; and

a working channel configured for insertion of a surgical tool, wherein the working channel extends through the tip section and has an exit opening on said distal face; and

a display configured to display images from each of the front-pointing camera, first side-pointing camera, and second side-pointing camera.

11. The endoscope according to claim 10 , wherein the fluid injector is a first fluid injector, and wherein said tip section further comprises a second fluid injector for inflating and/or cleaning a body cavity into which the endoscope is inserted, wherein the second fluid injector extends through the tip section and has an exit opening on said distal face.

12. The endoscope according to claim 10 , wherein the fluid injector is a first fluid injector, and wherein said tip section further comprises a second fluid injector configured for cleaning at least one of said front-pointing camera and said discrete front illuminator wherein the second fluid injector extends through the tip section and has an exit opening on said distal face.

13. The endoscope according to claim 10 , wherein said tip section further comprises at least one additional side fluid injector configured for cleaning the second side-pointing camera and/or said discrete side illuminators.

14. The endoscope according to claim 10 , wherein said tip section comprises three or more side-pointing cameras positioned essentially at equal distances from each other along the perimeter of said tip section.

15. The endoscope according to claim 10 , wherein said discrete front illuminator comprises a light-emitting diode (LED).

16. The endoscope according to claim 10 , wherein each of said discrete side illuminators comprises a light-emitting diode (LED).

17. The endoscope according to claim 10 , wherein each of said discrete front and side illuminators comprises a light-emitting diode (LED).

18. The endoscope according to claim 10 , wherein said endoscope is a colonoscope.