Patent ID: 9179829
Filing Date: 2015-11-10
Classification: A61B

Abstract:
1. An endoscope comprising: an insertion portion to be inserted into a subject; an operation portion provided at a proximal end of the insertion portion, the operation portion including operation means; a first light source section provided inside the operation portion, the first light source section being configured to generate first light with which the subject is irradiated; a light guiding section including an entrance portion provided on a proximal end side of the insertion portion and an emitting portion provided in a distal end portion of the insertion portion, the light guiding section being configured to attenuate light in a narrow wavelength band which is within a range of wavelength band of the first light entering the entrance portion and which is narrower than the wavelength band of the first light, and to emit the light from the emitting portion; a second light source section provided at the distal end portion of the insertion portion, the second light source being configured to generate the light in the narrow wavelength band within the range of wavelength band of the first light, the light being attenuated by the light guiding section, as second light; and an optical element provided at the distal end portion of the insertion portion, the optical element combining light emitted from the emitting portion of the light guiding section and the second light and emitting the resulting light from an illuminating window provided at the distal end portion.