Laser coagulation system.

摘要

A laser coagulation system adapted for use in an ophthalmological treatment comprises a laser source (40) capable of selectively producing one of a plurality of laser beams each different in wavelength, a slit image projector (20) for projecting a slit image into the eyeball to determine the selected portion to be coagulated in the eyeball, a laser beam projector (2l) for projecting the selected one of laser beams onto the selected portion to be coagulated, and an observation equipment (50) having an optical path to an observer for observing the slit image and laser beam projected onto the eyeball. A plurality of safety filters (76; 83, 84) each corresponding to one of the laser beams are mounted within the observation equipment (50) for absorbing the most energy relative to the corresponding laser beam, respectively. One of safety filters (76; 83, 84) is selected and brought into the observation optical path in response to the selection of either one of the laser beams to absorb the most energy which is generated by the selected laser beam and reflected back to the observation equipment.