Beam dump for particle counter or fluorescence detector

摘要

The present invention relates to a beam dump for a particle counter or a fluorescence detector that is mounted on one side of an optical chamber in such a manner as to be opposite to a beam-forming part mounted on the other side of the optical chamber, so as to dump the beam irradiated from the beam-forming part, the beam dump including: a body adapted to be fixed to the optical chamber; a focal lens assembly adapted to be fitted to an insertion hole penetrating into the center of the body; a pin hole assembly adapted to be inserted into a concave portion formed on the rear surface of the body in such a manner as to pass a light axis of the focal lens assembly through a pin hole; a housing adapted to be fixed to the rear surface of the pin hole assembly; and a light source output detector adapted to be fixed to the rear surface of the housing in such a manner as to be inclined to a given angle with respect to a reference plane perpendicular to the light axis of the focal lens assembly, wherein the pin hole assembly and the housing have a cavity formed in the center portions thereof, such that as the beam passed through the pin hole becomes gradually near the light source output detector, the width of the beam becomes spread.