Endoscopic spectral illumination device having LEDS emitting different wavelengths of light

An endoscope tip or capsule endoscope comprising

• an illumination device configured to illuminate a scene and including a plurality of groups of light sources, each of the groups of light sources including a respective first light source configured to emit light with a first spectral distribution, and further including a respective second light source configured to emit light with a second spectral distribution;
• an optical imaging device configured to image the scene, wherein each of said light sources are arranged in a circular pattern around and at the same radial distance from a center of the optical imaging device;
• and
• a working channel outlet configured to accommodate an instrument therethrough, positioned adjacent to the optical imaging device and protruding into a path of the circular pattern such that an area between the working channel outlet and the optical imaging device is free of light sources, wherein:
• the first spectral distribution is different from the second spectral distribution;
• for each of the groups and for each two light sources A and B selected from the first light source of the respective group, the second light source of the respective group, the first light source of the group adjacent to the respective group, and the second light source of the group adjacent to the respective group, a clearance between the light sources A and B indicates a length of a shortest straight line segment which connects a point on the light source A with a point on the light source B;
• and
• at least one of the following conditions is satisfied:
• for each of the groups the clearance between the first light source of the respective group and the second light source of the respective group is smaller than or equal to the clearance between the first light source of the respective group and the first light source of a group that is adjacent to the respective group;
• and
• for each of the groups the clearance between the first light source of the respective group and the second light source of the respective group is smaller than the clearance between the second light source of the respective group and the second light source of the group that is adjacent to the respective group.