endoscope

Abstract

The endoscope (10) has: a first fiber (61) of an optical fiber (60) provided at the front end with an exit angle formed at an angle smaller than 90 degrees relative to the longitudinal axis (61a). A first plane (61f) of illumination light; a tube (70) having a through-hole (71) in which the tip portion (61p) of the first fiber (61) is fixedly set, the tube ( 70) The front end surface (73) has a first surface (73a) that can be the same plane as the first plane (61f) and a second surface (73b) that is a plane perpendicular to the central axis (71a) of the through hole (71). ); and the front end structural part (30), which is formed with the blind hole (34) at the end of the front end side of the configuration pipe (70), and the second end of the pipe (70) is provided on the bottom surface side of the blind hole (34). A contact surface (38f2) on which at least a part of the surface (73b) contacts, and a concave part (37) located on the front end side of the contact surface (38f2) and constituting an illumination lens system for obtaining a predetermined light distribution .

Description

technical field [0001] The present invention relates to an endoscope configured such that an end portion having an output end surface of an optical fiber is fixedly installed in a concave portion corresponding to an illumination window portion formed of a transparent resin member. Background technique [0002] Endoscopes are widely used in the medical and industrial fields. An object of diagnosis or an object of observation by an endoscope is a living body, an inside of a mechanical device, or the like. Therefore, in an endoscope apparatus, a light source for illuminating a diagnosis object or an observation object is required. [0003] A general endoscope device includes an endoscope and a light source device as an external device of the endoscope. The light source device incorporates a light emitting source such as a lamp for emitting illumination light or a light emitting element. [0004] The illumination light emitted from the light emitting source is transmitted thr...

AI Technical Summary

Problems solved by technology

Therefore, the optical fiber surrounding the observation optical system may cause the outer diameter of the insertion part to become thicker.

In addition, since the tip of the optical fiber is brought into contact with the prevention part, part of the illumination light irradiated from the tip of the fiber directly enters the tip without passing through the lens system, which may adversely affect the optical performance.

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