Apparatus for irradiating laser

An apparatus for irradiating a laser, comprising:

• a main body;
• a laser resonator located within the main body and configured to generate a laser beam and output the laser beam forwards;
• a beam barrel which is arranged in front of the laser resonator and in which a focusing lens is fixed;
• a beam barrel guiding unit located in front of the main body and configured to guide forward and backward movement of the beam barrel;
• a forward and backward moving means connected to an outer periphery of the beam barrel and configured to move the beam barrel forwards and backwards relative to an irradiation target portion in front of the beam barrel;
• a window barrel which is connected to the front of the beam barrel guiding unit and allows a laser beam passing through the beam barrel to pass therethrough,
• wherein the beam barrel includes:
• a sliding fixing part protruded from a central portion of the outer peripheral surface;
• a screw unit formed along the outer peripheral surface in front of the sliding fixing part;
• and
• a sliding protruding part protruded from the outer peripheral surface in the back of the sliding fixing part, extended forwards and backwards;
• and
• an anti-contamination cap which is connected to the front of the window barrel and configured to suppress contamination of the window,
• wherein the beam barrel guiding unit includes a sliding hole into which the beam barrel is inserted, and a sliding groove into which the sliding protruding part is inserted formed in the sliding hole, so that the beam barrel is guided to slidably move forwards and backwards and a rotation movement of the beam barrel is prevented,
• wherein the sliding fixing part is formed to have a greater diameter than the sliding hole to restrict a scope of movement to the back of the beam barrel,
• wherein a screw thread is formed corresponding to the screw unit of the beam barrel on an inner surface of the forward and backward moving means to rotate the forward and backward moving means, so that the beam barrel is slidably moved forwards and backwards with respect to the window barrel and the anti-contamination cap exposed to patients.