RETINA PHOTOCOAGULATION LASER SYSTEM

摘要

PURPOSE: To reduce chance in damage to corneas as caused by the absorption of energy from a laser while enabling selecting of the wavelength and the intensity of laser radiation and a contact lens to match any specified treating purpose. CONSTITUTION: This system has a device 10 for generating a beam of laser radiation and a device 24 to irradiate the surface of a retina with the laser beam. The irradiator contains a lens system which changes the spot size of the beam on the surface of the retina to let it be freely operated in two change modes over a given range of the spot size. In one mode, the size of the spot is changed keeping the beam concentrated in the retina and in the other mode, the size of the spot in the retina is changed by varying the focus.