Endoscope

摘要

An endoscope includes: a distal end portion provided at a distal end of an insertion portion; a front-view observation window for observing an insertion direction of the distal end portion, which is provided facing toward the insertion direction; a lateral-view observation window for observing a circumferential direction of the distal end portion, which is formed along the outer circumferential lateral surface and has a lateral observation field of view; a light-emitting member having an emission end surface for emitting light in a distal end direction of the distal end portion; a groove portion formed on the outer circumferential lateral surface of the distal end portion so as to be longer than the emission end surface of the light-emitting member along the circumferential direction of the outer circumferential lateral surface of the distal end portion and opposed to the emission end surface, on a proximal end side with respect to the lateral-view observation window; a plurality of particles for scattering light arranged in the groove portion; and a transparent infill filled between the plurality of particles.

主权项

1. An endoscope comprising:
a distal end portion provided at a distal end of an insertion portion, and including a distal end surface which faces an insertion direction of the insertion portion and an outer circumferential lateral surface which faces a circumferential direction of the insertion portion; a front-view observation window for observing an insertion direction of the distal end portion, which is provided so as to face toward the insertion direction and has a front observation field of view; a lateral-view observation window for observing a circumferential direction of the distal end portion, which is formed along the outer circumferential lateral surface and has a lateral observation field of view; a cylindrical portion provided in a cylindrical shape at a predetermined part of the distal end portion; a light-guiding member for guiding light from a proximal end side of the insertion portion to the cylindrical portion, the light-guiding member including an emitting end surface from which the light is emitted; a groove portion including a groove for guiding light emitted from the light-guiding member, the groove being formed along an outer circumferential lateral surface of the cylindrical portion; an illumination reflection portion which is opposed to the emission end surface of the light-guiding member and provided in the groove portion, the illumination reflection portion reflecting light from the light-guiding member to an outer circumferential side of the cylindrical portion; and a lateral-view illumination window which his provided on the outer circumferential lateral surface of the cylindrical portion, the lateral-view illumination window emitting the light reflected by the illumination reflection portion in a circumferential direction of the cylindrical portion.