We have developed a compactportable ultraslim endoscope, which takes advantages of coupling lasersfibers. In this way, the footprint of the endoscopy illumination is greatly reduced. The image acquisition is implemented by synchronizing a monoCMOS camerathe switching of the RGB semiconductor lasers. Colorful images with higher spatial resolution, as well as NBI. This endoscope is expected to find applications including ductoscopy,blood vessel imaging.

The developed ultraslim endoscope prototype uses RGB semiconductor lasers as the illumination light source, which greatly facilitate the efficient coupling into illumination fibersthe reduction of illumination footprint in an endoscope. In this way, we have realized an ultraslim endoscope with the diameter as small as 0.49 mm.

The ultraslim endoscope uses RGB semiconductor lasers for illuminationis portable, which is widely applicable in many circumstances. When the surgical wound is less than 5 mm, there is no need for suturefree of scarring. The 0.49 mm ultraslim endoscope can be inserted into an injection needlemade to be disposable. We are aiming to develop an ultraslim endoscope to image the inside