Light irradiating device, scanning endoscopic device, manufacturing method of light irradiating device, and manufacturing method of scanning endoscopic device

摘要

In a light irradiating device of a scanning endoscopic device, a proximal end of a lens optical system is located apart from a distal end of an optical fiber in directions parallel to the longitudinal axis, and a lens-side facing portion faces a fiber-side facing portion apart from the fiber-side facing portion by a second dimension smaller than a first dimension between the distal end of the optical fiber and the proximal end of the lens optical system in the directions parallel to the longitudinal axis. The proximal end of the lens optical system and the distal end of the optical fiber are located between a distal end and a proximal end of the window in the directions parallel to the longitudinal axis.

主权项

1. A light irradiating device in a scanning endoscopic device which is configured to scan a subject to generate an image of the subject, the light irradiating device comprising:
an optical fiber which is extended along an longitudinal axis, and which is configured to emit, from a distal end thereof, light guided from a proximal direction to a distal direction; a lens optical system which is disposed so that a proximal end thereof is located apart from the distal end of the optical fiber in directions parallel to the longitudinal axis, and which is configured to collect the light emitted from the optical fiber to the subject; a cylindrical unit, the cylindrical unit including a fiber-side cylindrical portion to which the optical fiber is attached so that the movement of the optical fiber along the longitudinal axis is regulated, and a lens-side cylindrical portion to which the lens optical system is fixed and which is provided coaxially with the fiber-side cylindrical portion; a fiber-side facing portion which is provided in the fiber-side cylindrical portion so that the fiber-side facing portion faces in the distal direction; a lens-side facing portion which is provided in the lens-side cylindrical portion so that the lens-side facing portion faces in the proximal direction, and which faces the fiber-side facing portion apart from the fiber-side facing portion by a second dimension smaller than a first dimension between the distal end of the optical fiber and the proximal end of the lens optical system in the directions parallel to the longitudinal axis; and a window defining portion which defines a window provided along diametrical directions from an outer portion to an inner portion of the cylindrical unit, the window defining portion defining the window so that the proximal end of the lens optical system and the distal end of the optical fiber are located between a distal end and a proximal end of the window in the directions parallel to the longitudinal axis.