ELECTRONIC ENDOSCOPE, AND ELECTRONIC ENDOSCOPE SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an electronic endoscope obtainable of an observation image having large contrast between a blood vessel and surrounding part in observing the surface of a subject in proximity to the same.;SOLUTION: A distal end portion 16a provided in the electronic endoscope includes a distal end body 25, a distal end protecting cap 26, an observation lens 27 and illumination lenses 28a, 28b. A blue light reflecting surface 32 is formed on a distal end surface 26c of the distal end protecting cap 26. The observation lens 27 and the illumination lenses 28a, 28b are attached to positions exposed from through-holes 26d-26f formed on the distal end protecting cap 26, and the surfaces thereof are positioned on the same plane as that of the blue light reflecting surface 32. Of the light reflected on the surface H of a subject, blue light is reflected again by the blue light reflecting surface 32. The surface H of the subject is irradiated again with the blue light selectively reflected on the blue light reflecting surface 32. An observation range of an observation optical system 36 is irradiated with illumination light containing a large amount of blue light.;COPYRIGHT: (C)2013,JPO&INPIT