Abstract: A light-emitting device suppresses chromatic aberration following reduction of the beam-interval relative to a plurality of beams to be combined. The device has a plurality of light sources 10 and a beam-interval reducing device 30, having a first optical element 31 to which a plurality of beams L is incident, a second optical element 32 to which a plurality of beams L emitted from the first optical element 31, specifies the beam-interval of the plurality of beams L emitted from the second optical element 32 to be narrower than the beam-interval of the plurality of beams L incident to the first optical element 31, emits a plurality of beams L and cancels respectively each the chromatic aberration that occurs when the first optical element 31 and the second optical element 32 pass through.

Abstract: Light from a direction (D) different from a predetermined direction is reflected by a tapered surface (21) so as to enter an optical fiber (4) for guiding light entering along the predetermined direction to an appliance. Light from the desired direction (D) may thereby be reflected by the tapered surface (21) according to the angle of the tapered surface (21) and may be made to enter the optical fiber (4). Accordingly, even in a case where the installation position of an optical measurement probe (1) is limited, if the angle of the tapered surface (21) is appropriately set, light from the desired direction (D) may be made to enter the optical fiber (4).

Abstract: An attaching loop member to mount a printing device on a belt-like member worn by a user includes: a device-side member connectable to the printing device; and an attaching-side member mountable on the belt-like member worn by the user. The device-side member includes: a device-side plate portion; a fixing portion fixable to the printing device; a shaft portion and an engaging portion provided on the device-side plate portion. The attaching-side member includes: a bearing portion engageable with the shaft portion; an engaged portion engageable with the engaging portion; and an open portion providing an open region between the bearing portion and the engaged portion to allow the belt-like member to penetrate through the open region. The engagement of the shaft portion with the bearing portion allows the device-side member to pivot relative to the attaching-side member to realize engagement and disengagement of the engaging portion relative to the engaged portion.

Abstract: An attaching loop member to mount a printing device on a belt-like member worn by a user includes: a device-side member connectable to the printing device; and an attaching-side member mountable on the belt-like member worn by the user. The device-side member includes: a device-side plate portion; a fixing portion fixable to the printing device; a shaft portion and an engaging portion provided on the device-side plate portion. The attaching-side member includes: a bearing portion engageable with the shaft portion; an engaged portion engageable with the engaging portion; and an open portion providing an open region between the bearing portion and the engaged portion to allow the belt-like member to penetrate through the open region. The engagement of the shaft portion with the bearing portion allows the device-side member to pivot relative to the attaching-side member to realize engagement and disengagement of the engaging portion relative to the engaged portion.

Abstract: There are provided a plug built-in type optical measurement probe capable of obtaining a more accurate measurement value, and an optical measurement device provided with the same. A spark section and a light receiving section are held by a plug main body while being arranged next to each other in a protruding manner such that an end face of a holder is arranged at a position where discharge light from the spark section does not enter the field of view of the light receiving section. Accordingly, the light receiving section can be held in a manner protruding from the plug main body, and entering of the discharge light from the spark section can be restricted by the holder of the light receiving section.