Abstract: A laser light waveguide device includes laser light provision units that oscillate and cause laser light to exit; a laser light waveguide path formed of an optical fiber capable of guiding the laser light; and a control unit that controls the laser light provision units. The control unit detects an illumination spot (output of the visible laser light) based on a captured image, captured by an image capturing unit, of a laser light illumination area and an area close thereto illuminated with the laser light, and controls exit of the infrared laser light by the infrared laser light provision unit based on a result of detection of the illumination spot (output of the visible laser light).

Abstract: A laser light waveguide device includes laser light provision units that oscillate and cause laser light to exit; a laser light waveguide path formed of an optical fiber capable of guiding the laser light; and a control unit that controls the laser light provision units. The control unit detects an illumination spot (output of the visible laser light) based on a captured image, captured by an image capturing unit, of a laser light illumination area and an area close thereto illuminated with the laser light, and controls exit of the infrared laser light by the infrared laser light provision unit based on a result of detection of the illumination spot (output of the visible laser light).

Abstract: A dental laser radiation chip includes an optical fiber including a fiber center section having a core and a clad and also including a jacket for covering the fiber center section. The dental laser radiation chip radiates a laser light having a wavelength of around 3 ?m. A tip section of the dental laser radiation chip has a shape of frustum tapering forward in an axial direction. The shape of frustum includes a tip face from which forward laser light is to be radiated forward in the axial direction and an inclining side face from which side laser light is to be radiated in a radial direction with respect to the axial direction. The tip face is mirror-surface-finished to have a surface roughness of 0.008 ?m. The inclining side face is rough-surface-finished to have a surface roughness of 0.4 ?m.

Abstract: A dental laser radiation chip includes an optical fiber including a fiber center section having a core and a clad and also including a jacket for covering the fiber center section. The dental laser radiation chip radiates a laser light having a wavelength of around 3 ?m. A tip section of the dental laser radiation chip has a shape of frustum tapering forward in an axial direction. The shape of frustum includes a tip face from which forward laser light is to be radiated forward in the axial direction and an inclining side face from which side laser light is to be radiated in a radial direction with respect to the axial direction. The tip face is mirror-surface-finished to have a surface roughness of 0.008 ?m. The inclining side face is rough-surface-finished to have a surface roughness of 0.4 ?m.